support multiple chip(MT2712, MT7622, MT7623)
Signed-off-by: Zhi Mao <zhi.mao@xxxxxxxxxxxx>
---
drivers/pwm/pwm-mediatek.c | 63 +++++++++++++++++++++++++++++++++++---------
1 file changed, 51 insertions(+), 12 deletions(-)
diff --git a/drivers/pwm/pwm-mediatek.c b/drivers/pwm/pwm-mediatek.c
index c803ff6..d520356 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>
@@ -30,6 +31,8 @@
#define PWMDWIDTH 0x2c
#define PWMTHRES 0x30
+#define PWM_CLK_DIV_MAX 7
+
enum {
MTK_CLK_MAIN = 0,
MTK_CLK_TOP,
@@ -38,11 +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_com_pwm_data {
+ unsigned int pwm_nums;
};
/**
@@ -55,6 +66,11 @@ struct mtk_pwm_chip {
struct pwm_chip chip;
void __iomem *regs;
struct clk *clks[MTK_CLK_MAX];
+ const struct mtk_com_pwm_data *data;
+};
+
+static const unsigned long mtk_pwm_com_reg[] = {
+ 0x0010, 0x0050, 0x0090, 0x00d0, 0x0110, 0x0150, 0x0190, 0x0220
};
static inline struct mtk_pwm_chip *to_mtk_pwm_chip(struct pwm_chip *chip)
@@ -99,14 +115,14 @@ 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_com_reg[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_com_reg[num] + offset);
}
static int mtk_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
@@ -125,8 +141,10 @@ static int mtk_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
clkdiv++;
}
- if (clkdiv > 7)
+ if (clkdiv > PWM_CLK_DIV_MAX) {
+ dev_err(chip->dev, "period %d not supported\n", period_ns);
return -EINVAL;
+ }
mtk_pwm_writel(pc, pwm->hwpwm, PWMCON, BIT(15) | clkdiv);
mtk_pwm_writel(pc, pwm->hwpwm, PWMDWIDTH, period_ns / resolution);
@@ -181,23 +199,28 @@ 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->pwm_nums + 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, "[PWM] 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);
-
pc->chip.dev = &pdev->dev;
pc->chip.ops = &mtk_pwm_ops;
pc->chip.base = -1;
- pc->chip.npwm = 5;
+ pc->chip.npwm = pc->data->pwm_nums;
+
+ platform_set_drvdata(pdev, pc);
ret = pwmchip_add(&pc->chip);
if (ret < 0) {
@@ -215,9 +238,25 @@ static int mtk_pwm_remove(struct platform_device *pdev)
return pwmchip_remove(&pc->chip);
}
+/*==========================================*/
+static const struct mtk_com_pwm_data mt2712_pwm_data = {
+ .pwm_nums = 8,
+};
+
+static const struct mtk_com_pwm_data mt7622_pwm_data = {
+ .pwm_nums = 6,
+};
+
+static const struct mtk_com_pwm_data mt7623_pwm_data = {
+ .pwm_nums = 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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