@@ -1,12 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
/*
- * Mediatek Pulse Width Modulator driver
+ * MediaTek Pulse Width Modulator driver
*
* Copyright (C) 2015 John Crispin <blogic@openwrt.org>
* Copyright (C) 2017 Zhi Mao <zhi.mao@mediatek.com>
*
- * This file is licensed under the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
*/
#include <linux/err.h>
@@ -35,41 +33,43 @@
#define PWM_CLK_DIV_MAX 7
-struct mtk_pwm_platform_data {
+struct pwm_mediatek_of_data {
unsigned int fallback_npwms;
bool pwm45_fixup;
bool has_clks;
};
/**
- * struct mtk_pwm_chip - struct representing PWM chip
+ * struct pwm_mediatek_chip - struct representing PWM chip
* @chip: linux PWM chip representation
* @regs: base address of PWM chip
* @clk_top: the top clock generator
* @clk_main: the clock used by PWM core
* @clk_pwms: the clock used by each PWM channel
*/
-struct mtk_pwm_chip {
+struct pwm_mediatek_chip {
struct pwm_chip chip;
void __iomem *regs;
struct clk *clk_top;
struct clk *clk_main;
struct clk **clk_pwms;
- const struct mtk_pwm_platform_data *soc;
+ const struct pwm_mediatek_of_data *soc;
};
-static const unsigned int mtk_pwm_reg_offset[] = {
+static const unsigned int pwm_mediatek_reg_offset[] = {
0x0010, 0x0050, 0x0090, 0x00d0, 0x0110, 0x0150, 0x0190, 0x0220
};
-static inline struct mtk_pwm_chip *to_mtk_pwm_chip(struct pwm_chip *chip)
+static inline struct pwm_mediatek_chip *
+to_pwm_mediatek_chip(struct pwm_chip *chip)
{
- return container_of(chip, struct mtk_pwm_chip, chip);
+ return container_of(chip, struct pwm_mediatek_chip, chip);
}
-static int mtk_pwm_clk_enable(struct pwm_chip *chip, struct pwm_device *pwm)
+static int pwm_mediatek_clk_enable(struct pwm_chip *chip,
+ struct pwm_device *pwm)
{
- struct mtk_pwm_chip *pc = to_mtk_pwm_chip(chip);
+ struct pwm_mediatek_chip *pc = to_pwm_mediatek_chip(chip);
int ret;
if (!pc->soc->has_clks)
@@ -97,9 +97,10 @@ static int mtk_pwm_clk_enable(struct pwm_chip *chip, struct pwm_device *pwm)
return ret;
}
-static void mtk_pwm_clk_disable(struct pwm_chip *chip, struct pwm_device *pwm)
+static void pwm_mediatek_clk_disable(struct pwm_chip *chip,
+ struct pwm_device *pwm)
{
- struct mtk_pwm_chip *pc = to_mtk_pwm_chip(chip);
+ struct pwm_mediatek_chip *pc = to_pwm_mediatek_chip(chip);
if (!pc->soc->has_clks)
return;
@@ -109,30 +110,30 @@ static void mtk_pwm_clk_disable(struct pwm_chip *chip, struct pwm_device *pwm)
clk_disable_unprepare(pc->clk_top);
}
-static inline u32 mtk_pwm_readl(struct mtk_pwm_chip *chip, unsigned int num,
- unsigned int offset)
+static inline u32 pwm_mediatek_readl(struct pwm_mediatek_chip *chip,
+ unsigned int num, unsigned int offset)
{
- return readl(chip->regs + mtk_pwm_reg_offset[num] + offset);
+ return readl(chip->regs + pwm_mediatek_reg_offset[num] + offset);
}
-static inline void mtk_pwm_writel(struct mtk_pwm_chip *chip,
- unsigned int num, unsigned int offset,
- u32 value)
+static inline void pwm_mediatek_writel(struct pwm_mediatek_chip *chip,
+ unsigned int num, unsigned int offset,
+ u32 value)
{
- writel(value, chip->regs + mtk_pwm_reg_offset[num] + offset);
+ writel(value, chip->regs + pwm_mediatek_reg_offset[num] + offset);
}
-static int mtk_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
- int duty_ns, int period_ns)
+static int pwm_mediatek_config(struct pwm_chip *chip, struct pwm_device *pwm,
+ int duty_ns, int period_ns)
{
- struct mtk_pwm_chip *pc = to_mtk_pwm_chip(chip);
+ struct pwm_mediatek_chip *pc = to_pwm_mediatek_chip(chip);
struct clk *clk = pc->soc->has_clks ? pc->clk_pwms[pwm->hwpwm] : NULL;
u32 clkdiv = 0, cnt_period, cnt_duty, reg_width = PWMDWIDTH,
reg_thres = PWMTHRES;
u64 resolution;
int ret;
- ret = mtk_pwm_clk_enable(chip, pwm);
+ ret = pwm_mediatek_clk_enable(chip, pwm);
if (ret < 0)
return ret;
@@ -149,7 +150,7 @@ static int mtk_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
}
if (clkdiv > PWM_CLK_DIV_MAX) {
- mtk_pwm_clk_disable(chip, pwm);
+ pwm_mediatek_clk_disable(chip, pwm);
dev_err(chip->dev, "period %d not supported\n", period_ns);
return -EINVAL;
}
@@ -164,22 +165,22 @@ static int mtk_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
}
cnt_duty = DIV_ROUND_CLOSEST_ULL((u64)duty_ns * 1000, resolution);
- mtk_pwm_writel(pc, pwm->hwpwm, PWMCON, BIT(15) | clkdiv);
- mtk_pwm_writel(pc, pwm->hwpwm, reg_width, cnt_period);
- mtk_pwm_writel(pc, pwm->hwpwm, reg_thres, cnt_duty);
+ pwm_mediatek_writel(pc, pwm->hwpwm, PWMCON, BIT(15) | clkdiv);
+ pwm_mediatek_writel(pc, pwm->hwpwm, reg_width, cnt_period);
+ pwm_mediatek_writel(pc, pwm->hwpwm, reg_thres, cnt_duty);
- mtk_pwm_clk_disable(chip, pwm);
+ pwm_mediatek_clk_disable(chip, pwm);
return 0;
}
-static int mtk_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
+static int pwm_mediatek_enable(struct pwm_chip *chip, struct pwm_device *pwm)
{
- struct mtk_pwm_chip *pc = to_mtk_pwm_chip(chip);
+ struct pwm_mediatek_chip *pc = to_pwm_mediatek_chip(chip);
u32 value;
int ret;
- ret = mtk_pwm_clk_enable(chip, pwm);
+ ret = pwm_mediatek_clk_enable(chip, pwm);
if (ret < 0)
return ret;
@@ -190,29 +191,29 @@ static int mtk_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
return 0;
}
-static void mtk_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)
+static void pwm_mediatek_disable(struct pwm_chip *chip, struct pwm_device *pwm)
{
- struct mtk_pwm_chip *pc = to_mtk_pwm_chip(chip);
+ struct pwm_mediatek_chip *pc = to_pwm_mediatek_chip(chip);
u32 value;
value = readl(pc->regs);
value &= ~BIT(pwm->hwpwm);
writel(value, pc->regs);
- mtk_pwm_clk_disable(chip, pwm);
+ pwm_mediatek_clk_disable(chip, pwm);
}
-static const struct pwm_ops mtk_pwm_ops = {
- .config = mtk_pwm_config,
- .enable = mtk_pwm_enable,
- .disable = mtk_pwm_disable,
+static const struct pwm_ops pwm_mediatek_ops = {
+ .config = pwm_mediatek_config,
+ .enable = pwm_mediatek_enable,
+ .disable = pwm_mediatek_disable,
.owner = THIS_MODULE,
};
-static int mtk_pwm_probe(struct platform_device *pdev)
+static int pwm_mediatek_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
- struct mtk_pwm_chip *pc;
+ struct pwm_mediatek_chip *pc;
struct resource *res;
unsigned int npwms;
int ret;
@@ -269,7 +270,7 @@ static int mtk_pwm_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, pc);
pc->chip.dev = &pdev->dev;
- pc->chip.ops = &mtk_pwm_ops;
+ pc->chip.ops = &pwm_mediatek_ops;
pc->chip.base = -1;
pc->chip.npwm = npwms;
@@ -282,55 +283,55 @@ static int mtk_pwm_probe(struct platform_device *pdev)
return 0;
}
-static int mtk_pwm_remove(struct platform_device *pdev)
+static int pwm_mediatek_remove(struct platform_device *pdev)
{
- struct mtk_pwm_chip *pc = platform_get_drvdata(pdev);
+ struct pwm_mediatek_chip *pc = platform_get_drvdata(pdev);
return pwmchip_remove(&pc->chip);
}
-static const struct mtk_pwm_platform_data mt2712_pwm_data = {
+static const struct pwm_mediatek_of_data mt2712_pwm_data = {
.fallback_npwms = 8,
.pwm45_fixup = false,
.has_clks = true,
};
-static const struct mtk_pwm_platform_data mt7622_pwm_data = {
+static const struct pwm_mediatek_of_data mt7622_pwm_data = {
.fallback_npwms = 6,
.pwm45_fixup = false,
.has_clks = true,
};
-static const struct mtk_pwm_platform_data mt7623_pwm_data = {
+static const struct pwm_mediatek_of_data mt7623_pwm_data = {
.fallback_npwms = 5,
.pwm45_fixup = true,
.has_clks = true,
};
-static const struct mtk_pwm_platform_data mt7628_pwm_data = {
+static const struct pwm_mediatek_of_data mt7628_pwm_data = {
.fallback_npwms = 4,
.pwm45_fixup = true,
.has_clks = false,
};
-static const struct of_device_id mtk_pwm_of_match[] = {
+static const struct of_device_id pwm_mediatek_of_match[] = {
{ .compatible = "mediatek,mt2712-pwm", .data = &mt2712_pwm_data },
{ .compatible = "mediatek,mt7622-pwm", .data = &mt7622_pwm_data },
{ .compatible = "mediatek,mt7623-pwm", .data = &mt7623_pwm_data },
{ .compatible = "mediatek,mt7628-pwm", .data = &mt7628_pwm_data },
{ },
};
-MODULE_DEVICE_TABLE(of, mtk_pwm_of_match);
+MODULE_DEVICE_TABLE(of, pwm_mediatek_of_match);
-static struct platform_driver mtk_pwm_driver = {
+static struct platform_driver pwm_mediatek_driver = {
.driver = {
- .name = "mtk-pwm",
- .of_match_table = mtk_pwm_of_match,
+ .name = "pwm-mediatek",
+ .of_match_table = pwm_mediatek_of_match,
},
- .probe = mtk_pwm_probe,
- .remove = mtk_pwm_remove,
+ .probe = pwm_mediatek_probe,
+ .remove = pwm_mediatek_remove,
};
-module_platform_driver(mtk_pwm_driver);
+module_platform_driver(pwm_mediatek_driver);
MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");