diff --git a/drivers/pwm/pwm-sti.c b/drivers/pwm/pwm-sti.c index 7cd7e4be7623..388f2aa285ae 100644 --- a/drivers/pwm/pwm-sti.c +++ b/drivers/pwm/pwm-sti.c @@ -21,18 +21,22 @@ #include #include -#define STI_DS_REG(ch) (4 * (ch)) /* Device's Duty Cycle register */ -#define STI_PWMCR 0x50 /* Control/Config register */ -#define STI_INTEN 0x54 /* Interrupt Enable/Disable register */ +#define PWM_OUT_VAL(x) (0x00 + (4 * (x))) /* Device's Duty Cycle register */ + +#define STI_PWM_CTRL 0x50 /* Control/Config register */ +#define STI_INT_EN 0x54 /* Interrupt Enable/Disable register */ #define PWM_PRESCALE_LOW_MASK 0x0f #define PWM_PRESCALE_HIGH_MASK 0xf0 /* Regfield IDs */ enum { + /* Bits in PWM_CTRL*/ PWMCLK_PRESCALE_LOW, PWMCLK_PRESCALE_HIGH, - PWM_EN, - PWM_INT_EN, + + PWM_OUT_EN, + + PWM_CPT_INT_EN, /* Keep last */ MAX_REGFIELDS @@ -47,14 +51,14 @@ struct sti_pwm_compat_data { struct sti_pwm_chip { struct device *dev; - struct clk *clk; unsigned long clk_rate; + struct clk *pwm_clk; struct regmap *regmap; struct sti_pwm_compat_data *cdata; struct regmap_field *prescale_low; struct regmap_field *prescale_high; - struct regmap_field *pwm_en; - struct regmap_field *pwm_int_en; + struct regmap_field *pwm_out_en; + struct regmap_field *pwm_cpt_int_en; struct pwm_chip chip; struct pwm_device *cur; unsigned long configured; @@ -64,10 +68,10 @@ struct sti_pwm_chip { }; static const struct reg_field sti_pwm_regfields[MAX_REGFIELDS] = { - [PWMCLK_PRESCALE_LOW] = REG_FIELD(STI_PWMCR, 0, 3), - [PWMCLK_PRESCALE_HIGH] = REG_FIELD(STI_PWMCR, 11, 14), - [PWM_EN] = REG_FIELD(STI_PWMCR, 9, 9), - [PWM_INT_EN] = REG_FIELD(STI_INTEN, 0, 0), + [PWMCLK_PRESCALE_LOW] = REG_FIELD(STI_PWM_CTRL, 0, 3), + [PWMCLK_PRESCALE_HIGH] = REG_FIELD(STI_PWM_CTRL, 11, 14), + [PWM_OUT_EN] = REG_FIELD(STI_PWM_CTRL, 9, 9), + [PWM_CPT_INT_EN] = REG_FIELD(STI_INT_EN, 1, 4), }; static inline struct sti_pwm_chip *to_sti_pwmchip(struct pwm_chip *chip) @@ -144,7 +148,7 @@ static int sti_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm, ((ncfg == 1) && (pwm->hwpwm != cur->hwpwm) && period_same) || ((ncfg > 1) && period_same)) { /* Enable clock before writing to PWM registers. */ - ret = clk_enable(pc->clk); + ret = clk_enable(pc->pwm_clk); if (ret) return ret; @@ -174,11 +178,12 @@ static int sti_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm, */ pwmvalx = cdata->max_pwm_cnt * duty_ns / period_ns; - ret = regmap_write(pc->regmap, STI_DS_REG(pwm->hwpwm), pwmvalx); + ret = regmap_write(pc->regmap, + PWM_OUT_VAL(pwm->hwpwm), pwmvalx); if (ret) goto clk_dis; - ret = regmap_field_write(pc->pwm_int_en, 0); + ret = regmap_field_write(pc->pwm_cpt_int_en, 0); set_bit(pwm->hwpwm, &pc->configured); pc->cur = pwm; @@ -190,7 +195,7 @@ static int sti_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm, } clk_dis: - clk_disable(pc->clk); + clk_disable(pc->pwm_clk); return ret; } @@ -206,11 +211,11 @@ static int sti_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm) */ mutex_lock(&pc->sti_pwm_lock); if (!pc->en_count) { - ret = clk_enable(pc->clk); + ret = clk_enable(pc->pwm_clk); if (ret) goto out; - ret = regmap_field_write(pc->pwm_en, 1); + ret = regmap_field_write(pc->pwm_out_en, 1); if (ret) { dev_err(dev, "failed to enable PWM device:%d\n", pwm->hwpwm); @@ -232,9 +237,9 @@ static void sti_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm) mutex_unlock(&pc->sti_pwm_lock); return; } - regmap_field_write(pc->pwm_en, 0); + regmap_field_write(pc->pwm_out_en, 0); - clk_disable(pc->clk); + clk_disable(pc->pwm_clk); mutex_unlock(&pc->sti_pwm_lock); } @@ -277,15 +282,16 @@ static int sti_pwm_probe_dt(struct sti_pwm_chip *pc) if (IS_ERR(pc->prescale_high)) return PTR_ERR(pc->prescale_high); - pc->pwm_en = devm_regmap_field_alloc(dev, pc->regmap, - reg_fields[PWM_EN]); - if (IS_ERR(pc->pwm_en)) - return PTR_ERR(pc->pwm_en); - pc->pwm_int_en = devm_regmap_field_alloc(dev, pc->regmap, - reg_fields[PWM_INT_EN]); - if (IS_ERR(pc->pwm_int_en)) - return PTR_ERR(pc->pwm_int_en); + pc->pwm_out_en = devm_regmap_field_alloc(dev, pc->regmap, + reg_fields[PWM_OUT_EN]); + if (IS_ERR(pc->pwm_out_en)) + return PTR_ERR(pc->pwm_out_en); + + pc->pwm_cpt_int_en = devm_regmap_field_alloc(dev, pc->regmap, + reg_fields[PWM_CPT_INT_EN]); + if (IS_ERR(pc->pwm_cpt_int_en)) + return PTR_ERR(pc->pwm_cpt_int_en); return 0; } @@ -341,19 +347,19 @@ static int sti_pwm_probe(struct platform_device *pdev) if (ret) return ret; - pc->clk = of_clk_get_by_name(dev->of_node, "pwm"); - if (IS_ERR(pc->clk)) { + pc->pwm_clk = of_clk_get_by_name(dev->of_node, "pwm"); + if (IS_ERR(pc->pwm_clk)) { dev_err(dev, "failed to get PWM clock\n"); - return PTR_ERR(pc->clk); + return PTR_ERR(pc->pwm_clk); } - pc->clk_rate = clk_get_rate(pc->clk); + pc->clk_rate = clk_get_rate(pc->pwm_clk); if (!pc->clk_rate) { dev_err(dev, "failed to get clock rate\n"); return -EINVAL; } - ret = clk_prepare(pc->clk); + ret = clk_prepare(pc->pwm_clk); if (ret) { dev_err(dev, "failed to prepare clock\n"); return ret; @@ -367,7 +373,7 @@ static int sti_pwm_probe(struct platform_device *pdev) ret = pwmchip_add(&pc->chip); if (ret < 0) { - clk_unprepare(pc->clk); + clk_unprepare(pc->pwm_clk); return ret; } @@ -384,7 +390,7 @@ static int sti_pwm_remove(struct platform_device *pdev) for (i = 0; i < pc->cdata->num_devs; i++) pwm_disable(&pc->chip.pwms[i]); - clk_unprepare(pc->clk); + clk_unprepare(pc->pwm_clk); return pwmchip_remove(&pc->chip); }