1 files changed, 44 insertions, 39 deletions

diff --git a/drivers/pwm/pwm-fsl-ftm.c b/drivers/pwm/pwm-fsl-ftm.c
index 96982da52d86..0f2cc7ef7784 100644
--- a/drivers/pwm/pwm-fsl-ftm.c
+++ b/drivers/pwm/pwm-fsl-ftm.c
@@ -18,6 +18,7 @@
 #include <linux/of_address.h>
 #include <linux/platform_device.h>
 #include <linux/pwm.h>
+#include <linux/regmap.h>
 #include <linux/slab.h>
 
 #define FTM_SC          0x00
@@ -82,7 +83,7 @@ struct fsl_pwm_chip {
         unsigned int cnt_select;
         unsigned int clk_ps;
 
-        void __iomem *base;
+        struct regmap *regmap;
 
         int period_ns;
 
@@ -218,10 +219,11 @@ static unsigned long fsl_pwm_calculate_duty(struct fsl_pwm_chip *fpc,
                                             unsigned long period_ns,
                                             unsigned long duty_ns)
 {
-        unsigned long long val, duty;
+        unsigned long long duty;
+        u32 val;
 
-        val = readl(fpc->base + FTM_MOD);
-        duty = duty_ns * (val + 1);
+        regmap_read(fpc->regmap, FTM_MOD, &val);
+        duty = (unsigned long long)duty_ns * (val + 1);
         do_div(duty, period_ns);
 
         return (unsigned long)duty;
@@ -231,7 +233,7 @@ static int fsl_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
                           int duty_ns, int period_ns)
 {
         struct fsl_pwm_chip *fpc = to_fsl_chip(chip);
-        u32 val, period, duty;
+        u32 period, duty;
 
         mutex_lock(&fpc->lock);
 
@@ -256,11 +258,9 @@ static int fsl_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
                         return -EINVAL;
                 }
 
-                val = readl(fpc->base + FTM_SC);
-                val &= ~FTM_SC_PS_MASK;
-                val |= fpc->clk_ps;
-                writel(val, fpc->base + FTM_SC);
-                writel(period - 1, fpc->base + FTM_MOD);
+                regmap_update_bits(fpc->regmap, FTM_SC, FTM_SC_PS_MASK,
+                                   fpc->clk_ps);
+                regmap_write(fpc->regmap, FTM_MOD, period - 1);
 
                 fpc->period_ns = period_ns;
         }
@@ -269,8 +269,9 @@ static int fsl_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
 
         duty = fsl_pwm_calculate_duty(fpc, period_ns, duty_ns);
 
-        writel(FTM_CSC_MSB | FTM_CSC_ELSB, fpc->base + FTM_CSC(pwm->hwpwm));
-        writel(duty, fpc->base + FTM_CV(pwm->hwpwm));
+        regmap_write(fpc->regmap, FTM_CSC(pwm->hwpwm),
+                     FTM_CSC_MSB | FTM_CSC_ELSB);
+        regmap_write(fpc->regmap, FTM_CV(pwm->hwpwm), duty);
 
         return 0;
 }
@@ -282,31 +283,28 @@ static int fsl_pwm_set_polarity(struct pwm_chip *chip,
         struct fsl_pwm_chip *fpc = to_fsl_chip(chip);
         u32 val;
 
-        val = readl(fpc->base + FTM_POL);
+        regmap_read(fpc->regmap, FTM_POL, &val);
 
         if (polarity == PWM_POLARITY_INVERSED)
                 val |= BIT(pwm->hwpwm);
         else
                 val &= ~BIT(pwm->hwpwm);
 
-        writel(val, fpc->base + FTM_POL);
+        regmap_write(fpc->regmap, FTM_POL, val);
 
         return 0;
 }
 
 static int fsl_counter_clock_enable(struct fsl_pwm_chip *fpc)
 {
-        u32 val;
         int ret;
 
         if (fpc->use_count != 0)
                 return 0;
 
         /* select counter clock source */
-        val = readl(fpc->base + FTM_SC);
-        val &= ~FTM_SC_CLK_MASK;
-        val |= FTM_SC_CLK(fpc->cnt_select);
-        writel(val, fpc->base + FTM_SC);
+        regmap_update_bits(fpc->regmap, FTM_SC, FTM_SC_CLK_MASK,
+                           FTM_SC_CLK(fpc->cnt_select));
 
         ret = clk_prepare_enable(fpc->clk[fpc->cnt_select]);
         if (ret)
@@ -326,13 +324,10 @@ static int fsl_counter_clock_enable(struct fsl_pwm_chip *fpc)
 static int fsl_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
 {
         struct fsl_pwm_chip *fpc = to_fsl_chip(chip);
-        u32 val;
         int ret;
 
         mutex_lock(&fpc->lock);
-        val = readl(fpc->base + FTM_OUTMASK);
-        val &= ~BIT(pwm->hwpwm);
-        writel(val, fpc->base + FTM_OUTMASK);
+        regmap_update_bits(fpc->regmap, FTM_OUTMASK, BIT(pwm->hwpwm), 0);
 
         ret = fsl_counter_clock_enable(fpc);
         mutex_unlock(&fpc->lock);
@@ -342,8 +337,6 @@ static int fsl_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
 
 static void fsl_counter_clock_disable(struct fsl_pwm_chip *fpc)
 {
-        u32 val;
-
         /*
          * already disabled, do nothing
          */
@@ -355,9 +348,7 @@ static void fsl_counter_clock_disable(struct fsl_pwm_chip *fpc)
                 return;
 
         /* no users left, disable PWM counter clock */
-        val = readl(fpc->base + FTM_SC);
-        val &= ~FTM_SC_CLK_MASK;
-        writel(val, fpc->base + FTM_SC);
+        regmap_update_bits(fpc->regmap, FTM_SC, FTM_SC_CLK_MASK, 0);
 
         clk_disable_unprepare(fpc->clk[FSL_PWM_CLK_CNTEN]);
         clk_disable_unprepare(fpc->clk[fpc->cnt_select]);
@@ -369,14 +360,12 @@ static void fsl_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)
         u32 val;
 
         mutex_lock(&fpc->lock);
-        val = readl(fpc->base + FTM_OUTMASK);
-        val |= BIT(pwm->hwpwm);
-        writel(val, fpc->base + FTM_OUTMASK);
+        regmap_update_bits(fpc->regmap, FTM_OUTMASK, BIT(pwm->hwpwm),
+                           BIT(pwm->hwpwm));
 
         fsl_counter_clock_disable(fpc);
 
-        val = readl(fpc->base + FTM_OUTMASK);
-
+        regmap_read(fpc->regmap, FTM_OUTMASK, &val);
         if ((val & 0xFF) == 0xFF)
                 fpc->period_ns = 0;
 
@@ -401,19 +390,28 @@ static int fsl_pwm_init(struct fsl_pwm_chip *fpc)
         if (ret)
                 return ret;
 
-        writel(0x00, fpc->base + FTM_CNTIN);
-        writel(0x00, fpc->base + FTM_OUTINIT);
-        writel(0xFF, fpc->base + FTM_OUTMASK);
+        regmap_write(fpc->regmap, FTM_CNTIN, 0x00);
+        regmap_write(fpc->regmap, FTM_OUTINIT, 0x00);
+        regmap_write(fpc->regmap, FTM_OUTMASK, 0xFF);
 
         clk_disable_unprepare(fpc->clk[FSL_PWM_CLK_SYS]);
 
         return 0;
 }
 
+static const struct regmap_config fsl_pwm_regmap_config = {
+        .reg_bits = 32,
+        .reg_stride = 4,
+        .val_bits = 32,
+
+        .max_register = FTM_PWMLOAD,
+};
+
 static int fsl_pwm_probe(struct platform_device *pdev)
 {
         struct fsl_pwm_chip *fpc;
         struct resource *res;
+        void __iomem *base;
         int ret;
 
         fpc = devm_kzalloc(&pdev->dev, sizeof(*fpc), GFP_KERNEL);
@@ -425,9 +423,16 @@ static int fsl_pwm_probe(struct platform_device *pdev)
         fpc->chip.dev = &pdev->dev;
 
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-        fpc->base = devm_ioremap_resource(&pdev->dev, res);
-        if (IS_ERR(fpc->base))
-                return PTR_ERR(fpc->base);
+        base = devm_ioremap_resource(&pdev->dev, res);
+        if (IS_ERR(base))
+                return PTR_ERR(base);
+
+        fpc->regmap = devm_regmap_init_mmio_clk(&pdev->dev, NULL, base,
+                                                &fsl_pwm_regmap_config);
+        if (IS_ERR(fpc->regmap)) {
+                dev_err(&pdev->dev, "regmap init failed\n");
+                return PTR_ERR(fpc->regmap);
+        }
 
         fpc->clk[FSL_PWM_CLK_SYS] = devm_clk_get(&pdev->dev, "ftm_sys");
         if (IS_ERR(fpc->clk[FSL_PWM_CLK_SYS])) {