Lines Matching refs:pwm
24 #include "pwm-lpss.h"
74 static inline u32 pwm_lpss_read(const struct pwm_device *pwm)
76 struct pwm_lpss_chip *lpwm = to_lpwm(pwm->chip);
78 return readl(lpwm->regs + pwm->hwpwm * PWM_SIZE + PWM);
81 static inline void pwm_lpss_write(const struct pwm_device *pwm, u32 value)
83 struct pwm_lpss_chip *lpwm = to_lpwm(pwm->chip);
85 writel(value, lpwm->regs + pwm->hwpwm * PWM_SIZE + PWM);
88 static int pwm_lpss_wait_for_update(struct pwm_device *pwm)
90 struct pwm_lpss_chip *lpwm = to_lpwm(pwm->chip);
91 const void __iomem *addr = lpwm->regs + pwm->hwpwm * PWM_SIZE + PWM;
109 dev_err(pwm->chip->dev, "PWM_SW_UPDATE was not cleared\n");
114 static inline int pwm_lpss_is_updating(struct pwm_device *pwm)
116 if (pwm_lpss_read(pwm) & PWM_SW_UPDATE) {
117 dev_err(pwm->chip->dev, "PWM_SW_UPDATE is still set, skipping update\n");
124 static void pwm_lpss_prepare(struct pwm_lpss_chip *lpwm, struct pwm_device *pwm,
149 ctrl = pwm_lpss_read(pwm);
155 pwm_lpss_write(pwm, ctrl);
156 pwm_lpss_write(pwm, ctrl | PWM_SW_UPDATE);
159 static inline void pwm_lpss_cond_enable(struct pwm_device *pwm, bool cond)
162 pwm_lpss_write(pwm, pwm_lpss_read(pwm) | PWM_ENABLE);
166 struct pwm_device *pwm,
171 ret = pwm_lpss_is_updating(pwm);
175 pwm_lpss_prepare(lpwm, pwm, state->duty_cycle, state->period);
176 pwm_lpss_cond_enable(pwm, lpwm->info->bypass == false);
177 ret = pwm_lpss_wait_for_update(pwm);
181 pwm_lpss_cond_enable(pwm, lpwm->info->bypass == true);
185 static int pwm_lpss_apply(struct pwm_chip *chip, struct pwm_device *pwm,
192 if (!pwm_is_enabled(pwm)) {
194 ret = pwm_lpss_prepare_enable(lpwm, pwm, state);
198 ret = pwm_lpss_prepare_enable(lpwm, pwm, state);
200 } else if (pwm_is_enabled(pwm)) {
201 pwm_lpss_write(pwm, pwm_lpss_read(pwm) & ~PWM_ENABLE);
208 static int pwm_lpss_get_state(struct pwm_chip *chip, struct pwm_device *pwm,
220 ctrl = pwm_lpss_read(pwm);