From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/drivers/pwm/pwm-hibvt.c | 61 ++++++++++++++++++++----------
1 files changed, 41 insertions(+), 20 deletions(-)
diff --git a/kernel/drivers/pwm/pwm-hibvt.c b/kernel/drivers/pwm/pwm-hibvt.c
index 27c107e..286e9b1 100644
--- a/kernel/drivers/pwm/pwm-hibvt.c
+++ b/kernel/drivers/pwm/pwm-hibvt.c
@@ -1,20 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* PWM Controller Driver for HiSilicon BVT SoCs
*
* Copyright (c) 2016 HiSilicon Technologies Co., Ltd.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/bitops.h>
@@ -49,15 +37,30 @@
struct clk *clk;
void __iomem *base;
struct reset_control *rstc;
+ const struct hibvt_pwm_soc *soc;
};
struct hibvt_pwm_soc {
u32 num_pwms;
+ bool quirk_force_enable;
};
-static const struct hibvt_pwm_soc pwm_soc[2] = {
- { .num_pwms = 4 },
- { .num_pwms = 8 },
+static const struct hibvt_pwm_soc hi3516cv300_soc_info = {
+ .num_pwms = 4,
+};
+
+static const struct hibvt_pwm_soc hi3519v100_soc_info = {
+ .num_pwms = 8,
+};
+
+static const struct hibvt_pwm_soc hi3559v100_shub_soc_info = {
+ .num_pwms = 8,
+ .quirk_force_enable = true,
+};
+
+static const struct hibvt_pwm_soc hi3559v100_soc_info = {
+ .num_pwms = 2,
+ .quirk_force_enable = true,
};
static inline struct hibvt_pwm_chip *to_hibvt_pwm_chip(struct pwm_chip *chip)
@@ -143,17 +146,28 @@
value = readl(base + PWM_CTRL_ADDR(pwm->hwpwm));
state->enabled = (PWM_ENABLE_MASK & value);
+ state->polarity = (PWM_POLARITY_MASK & value) ? PWM_POLARITY_INVERSED : PWM_POLARITY_NORMAL;
}
static int hibvt_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
- struct pwm_state *state)
+ const struct pwm_state *state)
{
+ struct hibvt_pwm_chip *hi_pwm_chip = to_hibvt_pwm_chip(chip);
+
if (state->polarity != pwm->state.polarity)
hibvt_pwm_set_polarity(chip, pwm, state->polarity);
if (state->period != pwm->state.period ||
- state->duty_cycle != pwm->state.duty_cycle)
+ state->duty_cycle != pwm->state.duty_cycle) {
hibvt_pwm_config(chip, pwm, state->duty_cycle, state->period);
+
+ /*
+ * Some implementations require the PWM to be enabled twice
+ * each time the duty cycle is refreshed.
+ */
+ if (hi_pwm_chip->soc->quirk_force_enable && state->enabled)
+ hibvt_pwm_enable(chip, pwm);
+ }
if (state->enabled != pwm->state.enabled) {
if (state->enabled)
@@ -198,6 +212,7 @@
pwm_chip->chip.npwm = soc->num_pwms;
pwm_chip->chip.of_xlate = of_pwm_xlate_with_flags;
pwm_chip->chip.of_pwm_n_cells = 3;
+ pwm_chip->soc = soc;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
pwm_chip->base = devm_ioremap_resource(&pdev->dev, res);
@@ -250,8 +265,14 @@
}
static const struct of_device_id hibvt_pwm_of_match[] = {
- { .compatible = "hisilicon,hi3516cv300-pwm", .data = &pwm_soc[0] },
- { .compatible = "hisilicon,hi3519v100-pwm", .data = &pwm_soc[1] },
+ { .compatible = "hisilicon,hi3516cv300-pwm",
+ .data = &hi3516cv300_soc_info },
+ { .compatible = "hisilicon,hi3519v100-pwm",
+ .data = &hi3519v100_soc_info },
+ { .compatible = "hisilicon,hi3559v100-shub-pwm",
+ .data = &hi3559v100_shub_soc_info },
+ { .compatible = "hisilicon,hi3559v100-pwm",
+ .data = &hi3559v100_soc_info },
{ }
};
MODULE_DEVICE_TABLE(of, hibvt_pwm_of_match);
--
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