// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Rockchip IO Voltage Domain driver
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*
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* Copyright 2014 MundoReader S.L.
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* Copyright 2014 Google, Inc.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/err.h>
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#include <linux/mfd/syscon.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/regulator/consumer.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/regulator/of_regulator.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/machine.h>
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#include <linux/rockchip/cpu.h>
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#include "../../regulator/internal.h"
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#define MAX_SUPPLIES 16
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/*
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* The max voltage for 1.8V and 3.3V come from the Rockchip datasheet under
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* "Recommended Operating Conditions" for "Digital GPIO". When the typical
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* is 3.3V the max is 3.6V. When the typical is 1.8V the max is 1.98V.
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*
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* They are used like this:
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* - If the voltage on a rail is above the "1.8" voltage (1.98V) we'll tell the
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* SoC we're at 3.3.
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* - If the voltage on a rail is above the "3.3" voltage (3.6V) we'll consider
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* that to be an error.
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*/
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#define MAX_VOLTAGE_1_8 1980000
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#define MAX_VOLTAGE_3_3 3600000
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#define PX30_IO_VSEL 0x180
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#define PX30_IO_VSEL_VCCIO6_SRC BIT(0)
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#define PX30_IO_VSEL_VCCIO6_SUPPLY_NUM 1
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#define RK3288_SOC_CON2 0x24c
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#define RK3288_SOC_CON2_FLASH0 BIT(7)
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#define RK3288_SOC_FLASH_SUPPLY_NUM 2
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#define RK3308_SOC_CON0 0x300
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#define RK3308_SOC_CON0_VCCIO3 BIT(8)
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#define RK3308_SOC_VCCIO3_SUPPLY_NUM 3
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#define RK3328_SOC_CON4 0x410
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#define RK3328_SOC_CON4_VCCIO2 BIT(7)
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#define RK3328_SOC_VCCIO2_SUPPLY_NUM 1
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#define RK3368_SOC_CON15 0x43c
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#define RK3368_SOC_CON15_FLASH0 BIT(14)
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#define RK3368_SOC_FLASH_SUPPLY_NUM 2
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#define RK3399_PMUGRF_CON0 0x180
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#define RK3399_PMUGRF_CON0_VSEL BIT(8)
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#define RK3399_PMUGRF_VSEL_SUPPLY_NUM 9
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#define RK3568_PMU_GRF_IO_VSEL0 (0x0140)
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#define RK3568_PMU_GRF_IO_VSEL1 (0x0144)
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#define RK3568_PMU_GRF_IO_VSEL2 (0x0148)
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struct rockchip_iodomain;
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struct rockchip_iodomain_supply {
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struct rockchip_iodomain *iod;
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struct regulator *reg;
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struct notifier_block nb;
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int idx;
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};
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struct rockchip_iodomain_soc_data {
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int grf_offset;
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const char *supply_names[MAX_SUPPLIES];
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void (*init)(struct rockchip_iodomain *iod);
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int (*write)(struct rockchip_iodomain_supply *supply, int uV);
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};
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struct rockchip_iodomain {
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struct device *dev;
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struct regmap *grf;
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const struct rockchip_iodomain_soc_data *soc_data;
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struct rockchip_iodomain_supply supplies[MAX_SUPPLIES];
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int (*write)(struct rockchip_iodomain_supply *supply, int uV);
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};
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static int rk3568_iodomain_write(struct rockchip_iodomain_supply *supply, int uV)
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{
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struct rockchip_iodomain *iod = supply->iod;
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u32 is_3v3 = uV > MAX_VOLTAGE_1_8;
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u32 val0, val1;
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int b;
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switch (supply->idx) {
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case 0: /* pmuio1 */
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break;
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case 1: /* pmuio2 */
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b = supply->idx;
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val0 = BIT(16 + b) | (is_3v3 ? 0 : BIT(b));
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b = supply->idx + 4;
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val1 = BIT(16 + b) | (is_3v3 ? BIT(b) : 0);
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regmap_write(iod->grf, RK3568_PMU_GRF_IO_VSEL2, val0);
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regmap_write(iod->grf, RK3568_PMU_GRF_IO_VSEL2, val1);
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break;
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case 3: /* vccio2 */
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break;
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case 2: /* vccio1 */
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case 4: /* vccio3 */
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case 5: /* vccio4 */
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case 6: /* vccio5 */
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case 7: /* vccio6 */
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case 8: /* vccio7 */
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b = supply->idx - 1;
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val0 = BIT(16 + b) | (is_3v3 ? 0 : BIT(b));
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val1 = BIT(16 + b) | (is_3v3 ? BIT(b) : 0);
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regmap_write(iod->grf, RK3568_PMU_GRF_IO_VSEL0, val0);
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regmap_write(iod->grf, RK3568_PMU_GRF_IO_VSEL1, val1);
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break;
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default:
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return -EINVAL;
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};
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return 0;
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}
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static int rockchip_iodomain_write(struct rockchip_iodomain_supply *supply,
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int uV)
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{
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struct rockchip_iodomain *iod = supply->iod;
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u32 val;
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int ret;
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/* set value bit */
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val = (uV > MAX_VOLTAGE_1_8) ? 0 : 1;
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val <<= supply->idx;
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/* apply hiword-mask */
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val |= (BIT(supply->idx) << 16);
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ret = regmap_write(iod->grf, iod->soc_data->grf_offset, val);
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if (ret)
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dev_err(iod->dev, "Couldn't write to GRF\n");
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return ret;
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}
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static int rockchip_iodomain_notify(struct notifier_block *nb,
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unsigned long event,
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void *data)
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{
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struct rockchip_iodomain_supply *supply =
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container_of(nb, struct rockchip_iodomain_supply, nb);
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int uV;
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int ret;
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/*
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* According to Rockchip it's important to keep the SoC IO domain
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* higher than (or equal to) the external voltage. That means we need
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* to change it before external voltage changes happen in the case
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* of an increase.
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*
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* Note that in the "pre" change we pick the max possible voltage that
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* the regulator might end up at (the client requests a range and we
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* don't know for certain the exact voltage). Right now we rely on the
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* slop in MAX_VOLTAGE_1_8 and MAX_VOLTAGE_3_3 to save us if clients
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* request something like a max of 3.6V when they really want 3.3V.
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* We could attempt to come up with better rules if this fails.
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*/
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if (event & REGULATOR_EVENT_PRE_VOLTAGE_CHANGE) {
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struct pre_voltage_change_data *pvc_data = data;
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uV = max_t(unsigned long, pvc_data->old_uV, pvc_data->max_uV);
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} else if (event & (REGULATOR_EVENT_VOLTAGE_CHANGE |
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REGULATOR_EVENT_ABORT_VOLTAGE_CHANGE)) {
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uV = (unsigned long)data;
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} else {
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return NOTIFY_OK;
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}
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dev_dbg(supply->iod->dev, "Setting to %d\n", uV);
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if (uV > MAX_VOLTAGE_3_3) {
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dev_err(supply->iod->dev, "Voltage too high: %d\n", uV);
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if (event == REGULATOR_EVENT_PRE_VOLTAGE_CHANGE)
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return NOTIFY_BAD;
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}
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ret = supply->iod->write(supply, uV);
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if (ret && event == REGULATOR_EVENT_PRE_VOLTAGE_CHANGE)
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return NOTIFY_BAD;
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dev_dbg(supply->iod->dev, "Setting to %d done\n", uV);
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return NOTIFY_OK;
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}
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static void px30_iodomain_init(struct rockchip_iodomain *iod)
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{
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int ret;
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u32 val;
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/* if no VCCIO6 supply we should leave things alone */
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if (!iod->supplies[PX30_IO_VSEL_VCCIO6_SUPPLY_NUM].reg)
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return;
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/*
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* set vccio6 iodomain to also use this framework
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* instead of a special gpio.
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*/
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val = PX30_IO_VSEL_VCCIO6_SRC | (PX30_IO_VSEL_VCCIO6_SRC << 16);
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ret = regmap_write(iod->grf, PX30_IO_VSEL, val);
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if (ret < 0)
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dev_warn(iod->dev, "couldn't update vccio6 ctrl\n");
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}
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static void rk3288_iodomain_init(struct rockchip_iodomain *iod)
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{
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int ret;
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u32 val;
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/* if no flash supply we should leave things alone */
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if (!iod->supplies[RK3288_SOC_FLASH_SUPPLY_NUM].reg)
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return;
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/*
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* set flash0 iodomain to also use this framework
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* instead of a special gpio.
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*/
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val = RK3288_SOC_CON2_FLASH0 | (RK3288_SOC_CON2_FLASH0 << 16);
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ret = regmap_write(iod->grf, RK3288_SOC_CON2, val);
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if (ret < 0)
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dev_warn(iod->dev, "couldn't update flash0 ctrl\n");
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}
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static void rk3308_iodomain_init(struct rockchip_iodomain *iod)
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{
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int ret;
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u32 val;
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/* if no vccio3 supply we should leave things alone */
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if (!iod->supplies[RK3308_SOC_VCCIO3_SUPPLY_NUM].reg)
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return;
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/*
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* set vccio3 iodomain to also use this framework
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* instead of a special gpio.
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*/
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val = RK3308_SOC_CON0_VCCIO3 | (RK3308_SOC_CON0_VCCIO3 << 16);
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ret = regmap_write(iod->grf, RK3308_SOC_CON0, val);
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if (ret < 0)
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dev_warn(iod->dev, "couldn't update vccio3 vsel ctrl\n");
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}
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static void rk3328_iodomain_init(struct rockchip_iodomain *iod)
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{
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int ret;
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u32 val;
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/* if no vccio2 supply we should leave things alone */
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if (!iod->supplies[RK3328_SOC_VCCIO2_SUPPLY_NUM].reg)
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return;
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/*
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* set vccio2 iodomain to also use this framework
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* instead of a special gpio.
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*/
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val = RK3328_SOC_CON4_VCCIO2 | (RK3328_SOC_CON4_VCCIO2 << 16);
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ret = regmap_write(iod->grf, RK3328_SOC_CON4, val);
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if (ret < 0)
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dev_warn(iod->dev, "couldn't update vccio2 vsel ctrl\n");
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}
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static void rk3368_iodomain_init(struct rockchip_iodomain *iod)
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{
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int ret;
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u32 val;
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/* if no flash supply we should leave things alone */
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if (!iod->supplies[RK3368_SOC_FLASH_SUPPLY_NUM].reg)
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return;
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/*
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* set flash0 iodomain to also use this framework
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* instead of a special gpio.
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*/
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val = RK3368_SOC_CON15_FLASH0 | (RK3368_SOC_CON15_FLASH0 << 16);
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ret = regmap_write(iod->grf, RK3368_SOC_CON15, val);
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if (ret < 0)
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dev_warn(iod->dev, "couldn't update flash0 ctrl\n");
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}
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static void rk3399_pmu_iodomain_init(struct rockchip_iodomain *iod)
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{
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int ret;
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u32 val;
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/* if no pmu io supply we should leave things alone */
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if (!iod->supplies[RK3399_PMUGRF_VSEL_SUPPLY_NUM].reg)
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return;
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/*
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* set pmu io iodomain to also use this framework
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* instead of a special gpio.
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*/
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val = RK3399_PMUGRF_CON0_VSEL | (RK3399_PMUGRF_CON0_VSEL << 16);
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ret = regmap_write(iod->grf, RK3399_PMUGRF_CON0, val);
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if (ret < 0)
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dev_warn(iod->dev, "couldn't update pmu io iodomain ctrl\n");
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}
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static const struct rockchip_iodomain_soc_data soc_data_px30 = {
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.grf_offset = 0x180,
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.supply_names = {
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NULL,
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"vccio6",
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"vccio1",
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"vccio2",
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"vccio3",
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"vccio4",
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"vccio5",
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"vccio-oscgpi",
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},
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.init = px30_iodomain_init,
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};
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static const struct rockchip_iodomain_soc_data soc_data_px30_pmu = {
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.grf_offset = 0x100,
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.supply_names = {
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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"pmuio1",
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"pmuio2",
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},
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};
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/*
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* On the rk3188 the io-domains are handled by a shared register with the
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* lower 8 bits being still being continuing drive-strength settings.
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*/
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static const struct rockchip_iodomain_soc_data soc_data_rk3188 = {
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.grf_offset = 0x104,
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.supply_names = {
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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"ap0",
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"ap1",
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"cif",
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"flash",
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"vccio0",
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"vccio1",
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"lcdc0",
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"lcdc1",
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},
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};
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static const struct rockchip_iodomain_soc_data soc_data_rk3228 = {
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.grf_offset = 0x418,
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.supply_names = {
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"vccio1",
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"vccio2",
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"vccio3",
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"vccio4",
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},
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};
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static const struct rockchip_iodomain_soc_data soc_data_rk3288 = {
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.grf_offset = 0x380,
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.supply_names = {
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"lcdc", /* LCDC_VDD */
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"dvp", /* DVPIO_VDD */
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"flash0", /* FLASH0_VDD (emmc) */
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"flash1", /* FLASH1_VDD (sdio1) */
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"wifi", /* APIO3_VDD (sdio0) */
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"bb", /* APIO5_VDD */
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"audio", /* APIO4_VDD */
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"sdcard", /* SDMMC0_VDD (sdmmc) */
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"gpio30", /* APIO1_VDD */
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"gpio1830", /* APIO2_VDD */
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},
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.init = rk3288_iodomain_init,
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};
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static const struct rockchip_iodomain_soc_data soc_data_rk3308 = {
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.grf_offset = 0x300,
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.supply_names = {
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"vccio0",
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"vccio1",
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"vccio2",
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"vccio3",
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"vccio4",
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"vccio5",
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},
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.init = rk3308_iodomain_init,
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};
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static const struct rockchip_iodomain_soc_data soc_data_rk3328 = {
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.grf_offset = 0x410,
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.supply_names = {
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"vccio1",
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"vccio2",
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"vccio3",
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"vccio4",
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"vccio5",
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"vccio6",
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"pmuio",
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},
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.init = rk3328_iodomain_init,
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};
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static const struct rockchip_iodomain_soc_data soc_data_rk3368 = {
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.grf_offset = 0x900,
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.supply_names = {
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NULL, /* reserved */
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"dvp", /* DVPIO_VDD */
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"flash0", /* FLASH0_VDD (emmc) */
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"wifi", /* APIO2_VDD (sdio0) */
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NULL,
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"audio", /* APIO3_VDD */
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"sdcard", /* SDMMC0_VDD (sdmmc) */
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"gpio30", /* APIO1_VDD */
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"gpio1830", /* APIO4_VDD (gpujtag) */
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},
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.init = rk3368_iodomain_init,
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};
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static const struct rockchip_iodomain_soc_data soc_data_rk3368_pmu = {
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.grf_offset = 0x100,
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.supply_names = {
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NULL,
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NULL,
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NULL,
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NULL,
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"pmu", /*PMU IO domain*/
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"vop", /*LCDC IO domain*/
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},
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};
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static const struct rockchip_iodomain_soc_data soc_data_rk3399 = {
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.grf_offset = 0xe640,
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.supply_names = {
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"bt656", /* APIO2_VDD */
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"audio", /* APIO5_VDD */
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"sdmmc", /* SDMMC0_VDD */
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"gpio1830", /* APIO4_VDD */
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},
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};
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static const struct rockchip_iodomain_soc_data soc_data_rk3399_pmu = {
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.grf_offset = 0x180,
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.supply_names = {
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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"pmu1830", /* PMUIO2_VDD */
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},
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.init = rk3399_pmu_iodomain_init,
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};
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static const struct rockchip_iodomain_soc_data soc_data_rk3568_pmu = {
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.grf_offset = 0x140,
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.supply_names = {
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"pmuio1",
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"pmuio2",
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"vccio1",
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"vccio2",
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"vccio3",
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"vccio4",
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"vccio5",
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"vccio6",
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"vccio7",
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},
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.write = rk3568_iodomain_write,
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};
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static const struct rockchip_iodomain_soc_data soc_data_rv1108 = {
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.grf_offset = 0x404,
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.supply_names = {
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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"vccio1",
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"vccio2",
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"vccio3",
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"vccio5",
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"vccio6",
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},
|
|
};
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static const struct rockchip_iodomain_soc_data soc_data_rv1108_pmu = {
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.grf_offset = 0x104,
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.supply_names = {
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"pmu",
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},
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};
|
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static const struct rockchip_iodomain_soc_data soc_data_rv1126_pmu = {
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.grf_offset = 0x140,
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.supply_names = {
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NULL,
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"vccio1",
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"vccio2",
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"vccio3",
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"vccio4",
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"vccio5",
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"vccio6",
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"vccio7",
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"pmuio0",
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"pmuio1",
|
},
|
};
|
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static const struct of_device_id rockchip_iodomain_match[] = {
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#ifdef CONFIG_CPU_PX30
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{
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.compatible = "rockchip,px30-io-voltage-domain",
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.data = (void *)&soc_data_px30
|
},
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{
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.compatible = "rockchip,px30-pmu-io-voltage-domain",
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.data = (void *)&soc_data_px30_pmu
|
},
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#endif
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#ifdef CONFIG_CPU_RK3188
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{
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.compatible = "rockchip,rk3188-io-voltage-domain",
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.data = &soc_data_rk3188
|
},
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#endif
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#ifdef CONFIG_CPU_RK322X
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{
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.compatible = "rockchip,rk3228-io-voltage-domain",
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.data = &soc_data_rk3228
|
},
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#endif
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#ifdef CONFIG_CPU_RK3288
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{
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.compatible = "rockchip,rk3288-io-voltage-domain",
|
.data = &soc_data_rk3288
|
},
|
#endif
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#ifdef CONFIG_CPU_RK3308
|
{
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.compatible = "rockchip,rk3308-io-voltage-domain",
|
.data = &soc_data_rk3308
|
},
|
#endif
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#ifdef CONFIG_CPU_RK3328
|
{
|
.compatible = "rockchip,rk3328-io-voltage-domain",
|
.data = &soc_data_rk3328
|
},
|
#endif
|
#ifdef CONFIG_CPU_RK3368
|
{
|
.compatible = "rockchip,rk3368-io-voltage-domain",
|
.data = &soc_data_rk3368
|
},
|
{
|
.compatible = "rockchip,rk3368-pmu-io-voltage-domain",
|
.data = &soc_data_rk3368_pmu
|
},
|
#endif
|
#ifdef CONFIG_CPU_RK3399
|
{
|
.compatible = "rockchip,rk3399-io-voltage-domain",
|
.data = &soc_data_rk3399
|
},
|
{
|
.compatible = "rockchip,rk3399-pmu-io-voltage-domain",
|
.data = &soc_data_rk3399_pmu
|
},
|
#endif
|
#ifdef CONFIG_CPU_RK3568
|
{
|
.compatible = "rockchip,rk3568-pmu-io-voltage-domain",
|
.data = &soc_data_rk3568_pmu
|
},
|
#endif
|
#ifdef CONFIG_CPU_RV1108
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{
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.compatible = "rockchip,rv1108-io-voltage-domain",
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.data = &soc_data_rv1108
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},
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{
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.compatible = "rockchip,rv1108-pmu-io-voltage-domain",
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.data = &soc_data_rv1108_pmu
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},
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#endif
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#ifdef CONFIG_CPU_RV1126
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{
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.compatible = "rockchip,rv1126-pmu-io-voltage-domain",
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.data = &soc_data_rv1126_pmu
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},
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#endif
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{ /* sentinel */ },
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};
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MODULE_DEVICE_TABLE(of, rockchip_iodomain_match);
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#ifndef MODULE
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static const char *rdev_get_name(struct regulator_dev *rdev)
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{
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if (rdev->constraints && rdev->constraints->name)
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return rdev->constraints->name;
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else if (rdev->desc->name)
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return rdev->desc->name;
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else
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return "";
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}
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static struct device_node *of_get_child_regulator(struct device_node *parent,
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const char *prop_name)
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{
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struct device_node *regnode = NULL;
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struct device_node *child = NULL;
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for_each_child_of_node(parent, child) {
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regnode = of_parse_phandle(child, prop_name, 0);
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if (!regnode) {
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regnode = of_get_child_regulator(child, prop_name);
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if (regnode)
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return regnode;
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} else {
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return regnode;
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}
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}
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return NULL;
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}
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static struct device_node *of_get_regulator(struct device *dev, const char *supply)
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{
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struct device_node *regnode = NULL;
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char prop_name[256];
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dev_dbg(dev, "Looking up %s-supply from device tree\n", supply);
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snprintf(prop_name, sizeof(prop_name), "%s-supply", supply);
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regnode = of_parse_phandle(dev->of_node, prop_name, 0);
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if (!regnode) {
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regnode = of_get_child_regulator(dev->of_node, prop_name);
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if (regnode)
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return regnode;
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dev_dbg(dev, "Looking up %s property in node %pOF failed\n",
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prop_name, dev->of_node);
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return NULL;
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}
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return regnode;
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}
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static void rockchip_iodomain_dump(const struct platform_device *pdev,
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struct rockchip_iodomain_supply *supply)
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{
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struct rockchip_iodomain *iod = supply->iod;
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const char *name = iod->soc_data->supply_names[supply->idx];
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struct device *dev = iod->dev;
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struct device_node *node;
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struct regulator_dev *r = NULL;
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node = of_get_regulator(dev, name);
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if (node) {
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r = of_find_regulator_by_node(node);
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if (!IS_ERR_OR_NULL(r))
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dev_info(&pdev->dev, "%s(%d uV) supplied by %s\n",
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name, regulator_get_voltage(supply->reg),
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rdev_get_name(r));
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}
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}
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#else
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static inline void
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rockchip_iodomain_dump(const struct platform_device *pdev,
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struct rockchip_iodomain_supply *supply)
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{
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}
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#endif
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static int rv1126_iodomain_notify(struct notifier_block *nb,
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unsigned long event,
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void *data)
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{
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struct rockchip_iodomain_supply *supply =
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container_of(nb, struct rockchip_iodomain_supply, nb);
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int uV;
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int ret;
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if (event & REGULATOR_EVENT_PRE_VOLTAGE_CHANGE) {
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struct pre_voltage_change_data *pvc_data = data;
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uV = max_t(unsigned long, pvc_data->old_uV, pvc_data->max_uV);
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} else if (event & (REGULATOR_EVENT_VOLTAGE_CHANGE |
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REGULATOR_EVENT_ABORT_VOLTAGE_CHANGE)) {
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uV = (unsigned long)data;
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} else if (event & REGULATOR_EVENT_DISABLE) {
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uV = MAX_VOLTAGE_3_3;
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} else if (event & REGULATOR_EVENT_ENABLE) {
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if (!data)
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return NOTIFY_BAD;
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uV = (unsigned long)data;
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} else {
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return NOTIFY_OK;
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}
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if (uV <= 0) {
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dev_err(supply->iod->dev, "Voltage invalid: %d\n", uV);
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return NOTIFY_BAD;
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}
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dev_dbg(supply->iod->dev, "Setting to %d\n", uV);
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if (uV > MAX_VOLTAGE_3_3) {
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dev_err(supply->iod->dev, "Voltage too high: %d\n", uV);
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if (event == REGULATOR_EVENT_PRE_VOLTAGE_CHANGE)
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return NOTIFY_BAD;
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}
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ret = supply->iod->write(supply, uV);
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if (ret && event == REGULATOR_EVENT_PRE_VOLTAGE_CHANGE)
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return NOTIFY_BAD;
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dev_dbg(supply->iod->dev, "Setting to %d done\n", uV);
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return NOTIFY_OK;
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}
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static int rockchip_iodomain_probe(struct platform_device *pdev)
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{
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struct device_node *np = pdev->dev.of_node;
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const struct of_device_id *match;
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struct rockchip_iodomain *iod;
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struct device *parent;
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int i, ret = 0;
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if (!np)
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return -ENODEV;
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iod = devm_kzalloc(&pdev->dev, sizeof(*iod), GFP_KERNEL);
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if (!iod)
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return -ENOMEM;
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iod->dev = &pdev->dev;
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platform_set_drvdata(pdev, iod);
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|
match = of_match_node(rockchip_iodomain_match, np);
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iod->soc_data = match->data;
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|
if (iod->soc_data->write)
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iod->write = iod->soc_data->write;
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else
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iod->write = rockchip_iodomain_write;
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parent = pdev->dev.parent;
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if (parent && parent->of_node) {
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iod->grf = syscon_node_to_regmap(parent->of_node);
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} else {
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dev_dbg(&pdev->dev, "falling back to old binding\n");
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iod->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
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}
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if (IS_ERR(iod->grf)) {
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dev_err(&pdev->dev, "couldn't find grf regmap\n");
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return PTR_ERR(iod->grf);
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}
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for (i = 0; i < MAX_SUPPLIES; i++) {
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const char *supply_name = iod->soc_data->supply_names[i];
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struct rockchip_iodomain_supply *supply = &iod->supplies[i];
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struct regulator *reg;
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int uV;
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if (!supply_name)
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continue;
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/* PX30s pmuio1 not support 1v8 mode switch. */
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if (soc_is_px30s() && (!strcmp(supply_name, "pmuio1")))
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continue;
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reg = devm_regulator_get_optional(iod->dev, supply_name);
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if (IS_ERR(reg)) {
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ret = PTR_ERR(reg);
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/* If a supply wasn't specified, that's OK */
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if (ret == -ENODEV)
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continue;
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else if (ret != -EPROBE_DEFER)
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dev_err(iod->dev, "couldn't get regulator %s\n",
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supply_name);
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goto unreg_notify;
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}
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/* set initial correct value */
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uV = regulator_get_voltage(reg);
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/* must be a regulator we can get the voltage of */
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if (uV < 0) {
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dev_err(iod->dev, "Can't determine voltage: %s\n",
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supply_name);
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ret = uV;
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goto unreg_notify;
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}
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if (uV > MAX_VOLTAGE_3_3) {
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dev_crit(iod->dev,
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"%d uV is too high. May damage SoC!\n",
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uV);
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ret = -EINVAL;
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goto unreg_notify;
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}
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/* setup our supply */
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supply->idx = i;
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supply->iod = iod;
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supply->reg = reg;
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supply->nb.notifier_call = rockchip_iodomain_notify;
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if (IS_ENABLED(CONFIG_CPU_RV1126))
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supply->nb.notifier_call = rv1126_iodomain_notify;
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ret = iod->write(supply, uV);
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if (ret) {
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supply->reg = NULL;
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goto unreg_notify;
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}
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/* register regulator notifier */
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ret = regulator_register_notifier(reg, &supply->nb);
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if (ret) {
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dev_err(&pdev->dev,
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"regulator notifier request failed\n");
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supply->reg = NULL;
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goto unreg_notify;
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}
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rockchip_iodomain_dump(pdev, supply);
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}
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if (iod->soc_data->init)
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iod->soc_data->init(iod);
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return 0;
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unreg_notify:
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for (i = MAX_SUPPLIES - 1; i >= 0; i--) {
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struct rockchip_iodomain_supply *io_supply = &iod->supplies[i];
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if (io_supply->reg)
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regulator_unregister_notifier(io_supply->reg,
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&io_supply->nb);
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}
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return ret;
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}
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static int rockchip_iodomain_remove(struct platform_device *pdev)
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{
|
struct rockchip_iodomain *iod = platform_get_drvdata(pdev);
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int i;
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for (i = MAX_SUPPLIES - 1; i >= 0; i--) {
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struct rockchip_iodomain_supply *io_supply = &iod->supplies[i];
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if (io_supply->reg)
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regulator_unregister_notifier(io_supply->reg,
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&io_supply->nb);
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}
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return 0;
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}
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static struct platform_driver rockchip_iodomain_driver = {
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.probe = rockchip_iodomain_probe,
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.remove = rockchip_iodomain_remove,
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.driver = {
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.name = "rockchip-iodomain",
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.of_match_table = rockchip_iodomain_match,
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},
|
};
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|
static int __init rockchip_iodomain_driver_init(void)
|
{
|
return platform_driver_register(&rockchip_iodomain_driver);
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}
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fs_initcall(rockchip_iodomain_driver_init);
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|
static void __exit rockchip_iodomain_driver_exit(void)
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{
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platform_driver_unregister(&rockchip_iodomain_driver);
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}
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module_exit(rockchip_iodomain_driver_exit);
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MODULE_DESCRIPTION("Rockchip IO-domain driver");
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MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>");
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MODULE_AUTHOR("Doug Anderson <dianders@chromium.org>");
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MODULE_LICENSE("GPL v2");
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