| Message ID | 1508759828-22974-1-git-send-email-zhi.mao@mediatek.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 10/23/2017 01:57 PM, 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. > Add NULL pointer checking for "pc->data". > > Signed-off-by: Zhi Mao <zhi.mao@mediatek.com> > --- Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com> > 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..867cc74 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; > }; > > /** > @@ -57,6 +66,11 @@ struct mtk_pwm_chip { > struct pwm_chip chip; > void __iomem *regs; > struct clk *clks[MTK_CLK_MAX]; > + const struct mtk_pwm_platform_data *data; > +}; > + > +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) > @@ -103,14 +117,14 @@ 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, > @@ -194,15 +208,22 @@ static int mtk_pwm_probe(struct platform_device *pdev) > if (!pc) > return -ENOMEM; > > + pc->data = of_device_get_match_data(&pdev->dev); > + if (pc->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 < pc->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 = pc->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); > >
diff --git a/drivers/pwm/pwm-mediatek.c b/drivers/pwm/pwm-mediatek.c index 1d78ab1..867cc74 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; }; /** @@ -57,6 +66,11 @@ struct mtk_pwm_chip { struct pwm_chip chip; void __iomem *regs; struct clk *clks[MTK_CLK_MAX]; + const struct mtk_pwm_platform_data *data; +}; + +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) @@ -103,14 +117,14 @@ 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, @@ -194,15 +208,22 @@ static int mtk_pwm_probe(struct platform_device *pdev) if (!pc) return -ENOMEM; + pc->data = of_device_get_match_data(&pdev->dev); + if (pc->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 < pc->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 = pc->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);
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. Add NULL pointer checking for "pc->data". Signed-off-by: Zhi Mao <zhi.mao@mediatek.com> --- drivers/pwm/pwm-mediatek.c | 53 ++++++++++++++++++++++++++++++++++++-------- 1 file changed, 44 insertions(+), 9 deletions(-)