Lines Matching refs:pwm
21 #include "pwm-lpss.h"
37 static inline u32 pwm_lpss_read(const struct pwm_device *pwm)
39 struct pwm_lpss_chip *lpwm = to_lpwm(pwm->chip);
41 return readl(lpwm->regs + pwm->hwpwm * PWM_SIZE + PWM);
44 static inline void pwm_lpss_write(const struct pwm_device *pwm, u32 value)
46 struct pwm_lpss_chip *lpwm = to_lpwm(pwm->chip);
48 writel(value, lpwm->regs + pwm->hwpwm * PWM_SIZE + PWM);
51 static int pwm_lpss_wait_for_update(struct pwm_device *pwm)
53 struct pwm_lpss_chip *lpwm = to_lpwm(pwm->chip);
54 const void __iomem *addr = lpwm->regs + pwm->hwpwm * PWM_SIZE + PWM;
72 dev_err(pwm->chip->dev, "PWM_SW_UPDATE was not cleared\n");
77 static inline int pwm_lpss_is_updating(struct pwm_device *pwm)
79 return (pwm_lpss_read(pwm) & PWM_SW_UPDATE) ? -EBUSY : 0;
82 static void pwm_lpss_prepare(struct pwm_lpss_chip *lpwm, struct pwm_device *pwm,
107 ctrl = pwm_lpss_read(pwm);
113 pwm_lpss_write(pwm, ctrl);
114 pwm_lpss_write(pwm, ctrl | PWM_SW_UPDATE);
117 static inline void pwm_lpss_cond_enable(struct pwm_device *pwm, bool cond)
120 pwm_lpss_write(pwm, pwm_lpss_read(pwm) | PWM_ENABLE);
124 struct pwm_device *pwm,
129 ret = pwm_lpss_is_updating(pwm);
133 pwm_lpss_prepare(lpwm, pwm, state->duty_cycle, state->period);
134 pwm_lpss_cond_enable(pwm, lpwm->info->bypass == false);
135 ret = pwm_lpss_wait_for_update(pwm);
139 pwm_lpss_cond_enable(pwm, lpwm->info->bypass == true);
143 static int pwm_lpss_apply(struct pwm_chip *chip, struct pwm_device *pwm,
150 if (!pwm_is_enabled(pwm)) {
152 ret = pwm_lpss_prepare_enable(lpwm, pwm, state);
156 ret = pwm_lpss_prepare_enable(lpwm, pwm, state);
158 } else if (pwm_is_enabled(pwm)) {
159 pwm_lpss_write(pwm, pwm_lpss_read(pwm) & ~PWM_ENABLE);
166 static void pwm_lpss_get_state(struct pwm_chip *chip, struct pwm_device *pwm,
178 ctrl = pwm_lpss_read(pwm);