diff options
| -rw-r--r-- | drivers/pwm/pwm-stm32.c | 50 |
1 files changed, 31 insertions, 19 deletions
diff --git a/drivers/pwm/pwm-stm32.c b/drivers/pwm/pwm-stm32.c index 359b08596d9e..dd0b27783d02 100644 --- a/drivers/pwm/pwm-stm32.c +++ b/drivers/pwm/pwm-stm32.c @@ -19,6 +19,12 @@ #define CCMR_CHANNEL_MASK 0xFF #define MAX_BREAKINPUT 2 +struct stm32_breakinput { + u32 index; + u32 level; + u32 filter; +}; + struct stm32_pwm { struct pwm_chip chip; struct mutex lock; /* protect pwm config/enable */ @@ -26,15 +32,11 @@ struct stm32_pwm { struct regmap *regmap; u32 max_arr; bool have_complementary_output; + struct stm32_breakinput breakinputs[MAX_BREAKINPUT]; + unsigned int num_breakinputs; u32 capture[4] ____cacheline_aligned; /* DMA'able buffer */ }; -struct stm32_breakinput { - u32 index; - u32 level; - u32 filter; -}; - static inline struct stm32_pwm *to_stm32_pwm_dev(struct pwm_chip *chip) { return container_of(chip, struct stm32_pwm, chip); @@ -512,11 +514,27 @@ static int stm32_pwm_set_breakinput(struct stm32_pwm *priv, return (bdtr & bke) ? 0 : -EINVAL; } -static int stm32_pwm_apply_breakinputs(struct stm32_pwm *priv, +static int stm32_pwm_apply_breakinputs(struct stm32_pwm *priv) +{ + unsigned int i; + int ret; + + for (i = 0; i < priv->num_breakinputs; i++) { + ret = stm32_pwm_set_breakinput(priv, + priv->breakinputs[i].index, + priv->breakinputs[i].level, + priv->breakinputs[i].filter); + if (ret < 0) + return ret; + } + + return 0; +} + +static int stm32_pwm_probe_breakinputs(struct stm32_pwm *priv, struct device_node *np) { - struct stm32_breakinput breakinput[MAX_BREAKINPUT]; - int nb, ret, i, array_size; + int nb, ret, array_size; nb = of_property_count_elems_of_size(np, "st,breakinput", sizeof(struct stm32_breakinput)); @@ -531,20 +549,14 @@ static int stm32_pwm_apply_breakinputs(struct stm32_pwm *priv, if (nb > MAX_BREAKINPUT) return -EINVAL; + priv->num_breakinputs = nb; array_size = nb * sizeof(struct stm32_breakinput) / sizeof(u32); ret = of_property_read_u32_array(np, "st,breakinput", - (u32 *)breakinput, array_size); + (u32 *)priv->breakinputs, array_size); if (ret) return ret; - for (i = 0; i < nb && !ret; i++) { - ret = stm32_pwm_set_breakinput(priv, - breakinput[i].index, - breakinput[i].level, - breakinput[i].filter); - } - - return ret; + return stm32_pwm_apply_breakinputs(priv); } static void stm32_pwm_detect_complementary(struct stm32_pwm *priv) @@ -614,7 +626,7 @@ static int stm32_pwm_probe(struct platform_device *pdev) if (!priv->regmap || !priv->clk) return -EINVAL; - ret = stm32_pwm_apply_breakinputs(priv, np); + ret = stm32_pwm_probe_breakinputs(priv, np); if (ret) return ret; |