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Subject[PATCH v4 1/1] pwm: mediatek: add MT2712/MT7622 support
Date
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.

Signed-off-by: Zhi Mao <zhi.mao@mediatek.com>
---
drivers/pwm/pwm-mediatek.c | 51 ++++++++++++++++++++++++++++++++++++--------
1 file changed, 42 insertions(+), 9 deletions(-)

diff --git a/drivers/pwm/pwm-mediatek.c b/drivers/pwm/pwm-mediatek.c
index 1d78ab1..ccd86e7 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 +208,20 @@ static int mtk_pwm_probe(struct platform_device *pdev)
if (!pc)
return -ENOMEM;

+ pc->data = of_device_get_match_data(&pdev->dev);
+
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 +229,7 @@ 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 +247,23 @@ 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);

--
1.7.9.5
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