[PATCH v7 1/1] pwm: mediatek: add MT2712/MT7622 support

[Sean Wang]

Hi, Zhi

The patch have already got merged in 4.15 rc1 as

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=424268c7494c2ae24c95565b9047bbf30309e88a


	Sean

On Mon, 2017-11-13 at 20:39 +0800, Zhi Mao wrote:
> Hi Thierry,
> 
> Just have a ping for this patch.
> 
> Regards
> Zhi
> 
> 
> On Wed, 2017-10-25 at 18:11 +0800, Zhi Mao wrote:
> > Add support to MT2712 and MT7622.
> > Due to register offset address of pwm7 for MT2712 is not fixed 0x40,
> > add mtk_pwm_reg_offset array for pwm register offset.
> > 
> > Reviewed-by: Claudiu Beznea <claudiu.beznea at microchip.com>
> > Reviewed-by: Matthias Brugger <matthias.bgg at gmail.com>
> > Signed-off-by: Zhi Mao <zhi.mao at mediatek.com>
> > ---
> > changee in v7:
> > - adjust the commit message
> > 
> > Changes in v6:
> > - remove "struct mtk_pwm_platform_data" member from "mtk_pwm_chip". 
> > 
> > Changes in v5:
> > - Add NULL pointer checking for "data"
> > 
> >  drivers/pwm/pwm-mediatek.c |   53 ++++++++++++++++++++++++++++++++++++--------
> >  1 file changed, 44 insertions(+), 9 deletions(-)
> > 
> > diff --git a/drivers/pwm/pwm-mediatek.c b/drivers/pwm/pwm-mediatek.c
> > index 1d78ab1..cdd4d31 100644
> > --- a/drivers/pwm/pwm-mediatek.c
> > +++ b/drivers/pwm/pwm-mediatek.c
> > @@ -16,6 +16,7 @@
> >  #include <linux/module.h>
> >  #include <linux/clk.h>
> >  #include <linux/of.h>
> > +#include <linux/of_device.h>
> >  #include <linux/platform_device.h>
> >  #include <linux/pwm.h>
> >  #include <linux/slab.h>
> > @@ -40,11 +41,19 @@ enum {
> >  	MTK_CLK_PWM3,
> >  	MTK_CLK_PWM4,
> >  	MTK_CLK_PWM5,
> > +	MTK_CLK_PWM6,
> > +	MTK_CLK_PWM7,
> > +	MTK_CLK_PWM8,
> >  	MTK_CLK_MAX,
> >  };
> >  
> > -static const char * const mtk_pwm_clk_name[] = {
> > -	"main", "top", "pwm1", "pwm2", "pwm3", "pwm4", "pwm5"
> > +static const char * const mtk_pwm_clk_name[MTK_CLK_MAX] = {
> > +	"main", "top", "pwm1", "pwm2", "pwm3", "pwm4", "pwm5", "pwm6", "pwm7",
> > +	"pwm8"
> > +};
> > +
> > +struct mtk_pwm_platform_data {
> > +	unsigned int num_pwms;
> >  };
> >  
> >  /**
> > @@ -59,6 +68,10 @@ struct mtk_pwm_chip {
> >  	struct clk *clks[MTK_CLK_MAX];
> >  };
> >  
> > +static const unsigned int mtk_pwm_reg_offset[] = {
> > +	0x0010, 0x0050, 0x0090, 0x00d0, 0x0110, 0x0150, 0x0190, 0x0220
> > +};
> > +
> >  static inline struct mtk_pwm_chip *to_mtk_pwm_chip(struct pwm_chip *chip)
> >  {
> >  	return container_of(chip, struct mtk_pwm_chip, chip);
> > @@ -103,14 +116,14 @@ static void mtk_pwm_clk_disable(struct pwm_chip *chip, struct pwm_device *pwm)
> >  static inline u32 mtk_pwm_readl(struct mtk_pwm_chip *chip, unsigned int num,
> >  				unsigned int offset)
> >  {
> > -	return readl(chip->regs + 0x10 + (num * 0x40) + offset);
> > +	return readl(chip->regs + mtk_pwm_reg_offset[num] + offset);
> >  }
> >  
> >  static inline void mtk_pwm_writel(struct mtk_pwm_chip *chip,
> >  				  unsigned int num, unsigned int offset,
> >  				  u32 value)
> >  {
> > -	writel(value, chip->regs + 0x10 + (num * 0x40) + offset);
> > +	writel(value, chip->regs + mtk_pwm_reg_offset[num] + offset);
> >  }
> >  
> >  static int mtk_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
> > @@ -185,6 +198,7 @@ static void mtk_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)
> >  
> >  static int mtk_pwm_probe(struct platform_device *pdev)
> >  {
> > +	const struct mtk_pwm_platform_data *data;
> >  	struct mtk_pwm_chip *pc;
> >  	struct resource *res;
> >  	unsigned int i;
> > @@ -194,15 +208,22 @@ static int mtk_pwm_probe(struct platform_device *pdev)
> >  	if (!pc)
> >  		return -ENOMEM;
> >  
> > +	data = of_device_get_match_data(&pdev->dev);
> > +	if (data == NULL)
> > +		return -EINVAL;
> > +
> >  	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> >  	pc->regs = devm_ioremap_resource(&pdev->dev, res);
> >  	if (IS_ERR(pc->regs))
> >  		return PTR_ERR(pc->regs);
> >  
> > -	for (i = 0; i < MTK_CLK_MAX; i++) {
> > +	for (i = 0; i < data->num_pwms + 2; i++) {
> >  		pc->clks[i] = devm_clk_get(&pdev->dev, mtk_pwm_clk_name[i]);
> > -		if (IS_ERR(pc->clks[i]))
> > +		if (IS_ERR(pc->clks[i])) {
> > +			dev_err(&pdev->dev, "clock: %s fail: %ld\n",
> > +				mtk_pwm_clk_name[i], PTR_ERR(pc->clks[i]));
> >  			return PTR_ERR(pc->clks[i]);
> > +		}
> >  	}
> >  
> >  	platform_set_drvdata(pdev, pc);
> > @@ -210,7 +231,7 @@ static int mtk_pwm_probe(struct platform_device *pdev)
> >  	pc->chip.dev = &pdev->dev;
> >  	pc->chip.ops = &mtk_pwm_ops;
> >  	pc->chip.base = -1;
> > -	pc->chip.npwm = 5;
> > +	pc->chip.npwm = data->num_pwms;
> >  
> >  	ret = pwmchip_add(&pc->chip);
> >  	if (ret < 0) {
> > @@ -228,9 +249,23 @@ static int mtk_pwm_remove(struct platform_device *pdev)
> >  	return pwmchip_remove(&pc->chip);
> >  }
> >  
> > +static const struct mtk_pwm_platform_data mt2712_pwm_data = {
> > +	.num_pwms = 8,
> > +};
> > +
> > +static const struct mtk_pwm_platform_data mt7622_pwm_data = {
> > +	.num_pwms = 6,
> > +};
> > +
> > +static const struct mtk_pwm_platform_data mt7623_pwm_data = {
> > +	.num_pwms = 5,
> > +};
> > +
> >  static const struct of_device_id mtk_pwm_of_match[] = {
> > -	{ .compatible = "mediatek,mt7623-pwm" },
> > -	{ }
> > +	{ .compatible = "mediatek,mt2712-pwm", .data = &mt2712_pwm_data },
> > +	{ .compatible = "mediatek,mt7622-pwm", .data = &mt7622_pwm_data },
> > +	{ .compatible = "mediatek,mt7623-pwm", .data = &mt7623_pwm_data },
> > +	{ },
> >  };
> >  MODULE_DEVICE_TABLE(of, mtk_pwm_of_match);
> >  
> 
>