leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

pwm: mediatek: Use pwm_mediatek as common prefix

Browse Source 
Use pwm_mediatek as common prefix to match the filename. No functional
change intended.

Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Sam Shih <sam.shih@mediatek.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
This commit is contained in:
Sam Shih 2019-09-20 06:49:05 +08:00 committed by Thierry Reding
parent efecdeb82f
commit 2503781c97
1 changed files with 60 additions and 57 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

117
drivers/pwm/pwm-mediatek.c
View File

@ -35,13 +35,13 @@
#define PWM_CLK_DIV_MAX 7
struct mtk_pwm_platform_data {
struct pwm_mediatek_of_data {
unsigned int num_pwms;
bool pwm45_fixup;
};
/**
* 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
@ -49,27 +49,29 @@ struct mtk_pwm_platform_data {
* @clk_pwms: the clock used by each PWM channel
* @clk_freq: the fix clock frequency of legacy MIPS SoC
*/
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;
ret = clk_prepare_enable(pc->clk_top);
@ -94,45 +96,46 @@ disable_clk_top:
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);
clk_disable_unprepare(pc->clk_pwms[pwm->hwpwm]);
clk_disable_unprepare(pc->clk_main);
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 clk *clk = pc->clk_pwms[pwm->hwpwm];
struct pwm_mediatek_chip *pc = to_pwm_mediatek_chip(chip);
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;
/* Using resolution in picosecond gets accuracy higher */
resolution = (u64)NSEC_PER_SEC * 1000;
do_div(resolution, clk_get_rate(clk));
do_div(resolution, clk_get_rate(pc->clk_pwms[pwm->hwpwm]));
cnt_period = DIV_ROUND_CLOSEST_ULL((u64)period_ns * 1000, resolution);
while (cnt_period > 8191) {
@ -143,7 +146,7 @@ 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;
}
@ -158,22 +161,22 @@ 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;
@ -184,28 +187,28 @@ 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 mtk_pwm_chip *pc;
struct pwm_mediatek_chip *pc;
struct resource *res;
unsigned int i;
int ret;
@ -256,7 +259,7 @@ 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 = pc->soc->num_pwms;
@ -269,39 +272,39 @@ 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 = {
.num_pwms = 8,
.pwm45_fixup = false,
};
static const struct mtk_pwm_platform_data mt7622_pwm_data = {
static const struct pwm_mediatek_of_data mt7622_pwm_data = {
.num_pwms = 6,
.pwm45_fixup = false,
};
static const struct mtk_pwm_platform_data mt7623_pwm_data = {
static const struct pwm_mediatek_of_data mt7623_pwm_data = {
.num_pwms = 5,
.pwm45_fixup = true,
};
static const struct mtk_pwm_platform_data mt7628_pwm_data = {
static const struct pwm_mediatek_of_data mt7628_pwm_data = {
.num_pwms = 4,
.pwm45_fixup = true,
};
static const struct mtk_pwm_platform_data mt8516_pwm_data = {
static const struct pwm_mediatek_of_data mt8516_pwm_data = {
.num_pwms = 5,
.pwm45_fixup = 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 },
@ -309,17 +312,17 @@ static const struct of_device_id mtk_pwm_of_match[] = {
{ .compatible = "mediatek,mt8516-pwm", .data = &mt8516_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");