From 9d77db3c730780c8ef5ccd4b66403ff5675cfe4e Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 13 May 2024 10:30:14 +0000
Subject: [PATCH] modify sin led gpio
---
kernel/drivers/iio/dac/ad5758.c | 126 ++++++++++++++++++++++-------------------
1 files changed, 67 insertions(+), 59 deletions(-)
diff --git a/kernel/drivers/iio/dac/ad5758.c b/kernel/drivers/iio/dac/ad5758.c
index bd36333..bd9ac83 100644
--- a/kernel/drivers/iio/dac/ad5758.c
+++ b/kernel/drivers/iio/dac/ad5758.c
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0+
+// SPDX-License-Identifier: GPL-2.0
/*
* AD5758 Digital to analog converters driver
*
@@ -11,7 +11,10 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/property.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/spi/spi.h>
+#include <linux/gpio/consumer.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
@@ -71,8 +74,6 @@
#define AD5758_DCDC_CONFIG1_DCDC_VPROG_MODE(x) (((x) & 0x1F) << 0)
#define AD5758_DCDC_CONFIG1_DCDC_MODE_MSK GENMASK(6, 5)
#define AD5758_DCDC_CONFIG1_DCDC_MODE_MODE(x) (((x) & 0x3) << 5)
-#define AD5758_DCDC_CONFIG1_PROT_SW_EN_MSK BIT(7)
-#define AD5758_DCDC_CONFIG1_PROT_SW_EN_MODE(x) (((x) & 0x1) << 7)
/* AD5758_DCDC_CONFIG2 */
#define AD5758_DCDC_CONFIG2_ILIMIT_MSK GENMASK(3, 1)
@@ -83,21 +84,13 @@
/* AD5758_DIGITAL_DIAG_RESULTS */
#define AD5758_CAL_MEM_UNREFRESHED_MSK BIT(15)
+/* AD5758_ADC_CONFIG */
+#define AD5758_ADC_CONFIG_PPC_BUF_EN(x) (((x) & 0x1) << 11)
+#define AD5758_ADC_CONFIG_PPC_BUF_MSK BIT(11)
+
#define AD5758_WR_FLAG_MSK(x) (0x80 | ((x) & 0x1F))
#define AD5758_FULL_SCALE_MICRO 65535000000ULL
-
-/**
- * struct ad5758_state - driver instance specific data
- * @spi: spi_device
- * @lock: mutex lock
- * @out_range: struct which stores the output range
- * @dc_dc_mode: variable which stores the mode of operation
- * @dc_dc_ilim: variable which stores the dc-to-dc converter current limit
- * @slew_time: variable which stores the target slew time
- * @pwr_down: variable which contains whether a channel is powered down or not
- * @data: spi transfer buffers
- */
struct ad5758_range {
int reg;
@@ -105,9 +98,22 @@
int max;
};
+/**
+ * struct ad5758_state - driver instance specific data
+ * @spi: spi_device
+ * @lock: mutex lock
+ * @gpio_reset: gpio descriptor for the reset line
+ * @out_range: struct which stores the output range
+ * @dc_dc_mode: variable which stores the mode of operation
+ * @dc_dc_ilim: variable which stores the dc-to-dc converter current limit
+ * @slew_time: variable which stores the target slew time
+ * @pwr_down: variable which contains whether a channel is powered down or not
+ * @d32: spi transfer buffers
+ */
struct ad5758_state {
struct spi_device *spi;
struct mutex lock;
+ struct gpio_desc *gpio_reset;
struct ad5758_range out_range;
unsigned int dc_dc_mode;
unsigned int dc_dc_ilim;
@@ -116,7 +122,7 @@
__be32 d32[3];
};
-/**
+/*
* Output ranges corresponding to bits [3:0] from DAC_CONFIG register
* 0000: 0 V to 5 V voltage range
* 0001: 0 V to 10 V voltage range
@@ -313,6 +319,18 @@
{
int ret;
+ /*
+ * The ENABLE_PPC_BUFFERS bit must be set prior to enabling PPC current
+ * mode.
+ */
+ if (mode == AD5758_DCDC_MODE_PPC_CURRENT) {
+ ret = ad5758_spi_write_mask(st, AD5758_ADC_CONFIG,
+ AD5758_ADC_CONFIG_PPC_BUF_MSK,
+ AD5758_ADC_CONFIG_PPC_BUF_EN(1));
+ if (ret < 0)
+ return ret;
+ }
+
ret = ad5758_spi_write_mask(st, AD5758_DCDC_CONFIG1,
AD5758_DCDC_CONFIG1_DCDC_MODE_MSK,
AD5758_DCDC_CONFIG1_DCDC_MODE_MODE(mode));
@@ -442,23 +460,6 @@
AD5758_CAL_MEM_UNREFRESHED_MSK);
}
-static int ad5758_fault_prot_switch_en(struct ad5758_state *st, bool enable)
-{
- int ret;
-
- ret = ad5758_spi_write_mask(st, AD5758_DCDC_CONFIG1,
- AD5758_DCDC_CONFIG1_PROT_SW_EN_MSK,
- AD5758_DCDC_CONFIG1_PROT_SW_EN_MODE(enable));
- if (ret < 0)
- return ret;
- /*
- * Poll the BUSY_3WI bit in the DCDC_CONFIG2 register until it is 0.
- * This allows the 3-wire interface communication to complete.
- */
- return ad5758_wait_for_task_complete(st, AD5758_DCDC_CONFIG2,
- AD5758_DCDC_CONFIG2_BUSY_3WI_MSK);
-}
-
static int ad5758_internal_buffers_en(struct ad5758_state *st, bool enable)
{
int ret;
@@ -472,6 +473,21 @@
/* Wait to allow time for the internal calibrations to complete */
return ad5758_wait_for_task_complete(st, AD5758_DIGITAL_DIAG_RESULTS,
AD5758_CAL_MEM_UNREFRESHED_MSK);
+}
+
+static int ad5758_reset(struct ad5758_state *st)
+{
+ if (st->gpio_reset) {
+ gpiod_set_value(st->gpio_reset, 0);
+ usleep_range(100, 1000);
+ gpiod_set_value(st->gpio_reset, 1);
+ usleep_range(100, 1000);
+
+ return 0;
+ } else {
+ /* Perform a software reset */
+ return ad5758_soft_reset(st);
+ }
}
static int ad5758_reg_access(struct iio_dev *indio_dev,
@@ -568,8 +584,8 @@
{
struct ad5758_state *st = iio_priv(indio_dev);
bool pwr_down;
- unsigned int dcdc_config1_mode, dc_dc_mode, dac_config_mode, val;
- unsigned long int dcdc_config1_msk, dac_config_msk;
+ unsigned int dac_config_mode, val;
+ unsigned long int dac_config_msk;
int ret;
ret = kstrtobool(buf, &pwr_down);
@@ -577,24 +593,10 @@
return ret;
mutex_lock(&st->lock);
- if (pwr_down) {
- dc_dc_mode = AD5758_DCDC_MODE_POWER_OFF;
+ if (pwr_down)
val = 0;
- } else {
- dc_dc_mode = st->dc_dc_mode;
+ else
val = 1;
- }
-
- dcdc_config1_mode = AD5758_DCDC_CONFIG1_DCDC_MODE_MODE(dc_dc_mode) |
- AD5758_DCDC_CONFIG1_PROT_SW_EN_MODE(val);
- dcdc_config1_msk = AD5758_DCDC_CONFIG1_DCDC_MODE_MSK |
- AD5758_DCDC_CONFIG1_PROT_SW_EN_MSK;
-
- ret = ad5758_spi_write_mask(st, AD5758_DCDC_CONFIG1,
- dcdc_config1_msk,
- dcdc_config1_mode);
- if (ret < 0)
- goto err_unlock;
dac_config_mode = AD5758_DAC_CONFIG_OUT_EN_MODE(val) |
AD5758_DAC_CONFIG_INT_EN_MODE(val);
@@ -768,13 +770,18 @@
{
int regval, ret;
+ st->gpio_reset = devm_gpiod_get_optional(&st->spi->dev, "reset",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(st->gpio_reset))
+ return PTR_ERR(st->gpio_reset);
+
/* Disable CRC checks */
ret = ad5758_crc_disable(st);
if (ret < 0)
return ret;
- /* Perform a software reset */
- ret = ad5758_soft_reset(st);
+ /* Perform a reset */
+ ret = ad5758_reset(st);
if (ret < 0)
return ret;
@@ -819,11 +826,6 @@
return ret;
}
- /* Enable the VIOUT fault protection switch (FPS is closed) */
- ret = ad5758_fault_prot_switch_en(st, 1);
- if (ret < 0)
- return ret;
-
/* Power up the DAC and internal (INT) amplifiers */
ret = ad5758_internal_buffers_en(st, 1);
if (ret < 0)
@@ -852,7 +854,6 @@
mutex_init(&st->lock);
- indio_dev->dev.parent = &spi->dev;
indio_dev->name = spi_get_device_id(spi)->name;
indio_dev->info = &ad5758_info;
indio_dev->modes = INDIO_DIRECT_MODE;
@@ -882,9 +883,16 @@
};
MODULE_DEVICE_TABLE(spi, ad5758_id);
+static const struct of_device_id ad5758_of_match[] = {
+ { .compatible = "adi,ad5758" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, ad5758_of_match);
+
static struct spi_driver ad5758_driver = {
.driver = {
.name = KBUILD_MODNAME,
+ .of_match_table = ad5758_of_match,
},
.probe = ad5758_probe,
.id_table = ad5758_id,
--
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