diff options
| author | Lee Jones <lee.jones@linaro.org> | 2016-08-16 10:35:01 +0100 |
|---|---|---|
| committer | Thierry Reding <thierry.reding@gmail.com> | 2016-09-08 10:55:08 +0200 |
| commit | f66d78faf2dc4845e06d42854769968c4166fe6c (patch) | |
| tree | 15998e35a3f9c12359c2e09eb501596b3b063f24 /drivers/pwm | |
| parent | d81738b76feee2cf8f296ef943966f3f2a0e3fce (diff) | |
| download | op-kernel-dev-f66d78faf2dc4845e06d42854769968c4166fe6c.zip op-kernel-dev-f66d78faf2dc4845e06d42854769968c4166fe6c.tar.gz | |
pwm: sti: Supply PWM capture register addresses and bit locations
This is in preparation for subsequent patches that add support for PWM
capture to this driver.
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Diffstat (limited to 'drivers/pwm')
| -rw-r--r-- | drivers/pwm/pwm-sti.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/pwm/pwm-sti.c b/drivers/pwm/pwm-sti.c index da0c1bf..4e8ff9e 100644 --- a/drivers/pwm/pwm-sti.c +++ b/drivers/pwm/pwm-sti.c @@ -22,26 +22,48 @@ #include <linux/time.h> #define PWM_OUT_VAL(x) (0x00 + (4 * (x))) /* Device's Duty Cycle register */ +#define PWM_CPT_VAL(x) (0x10 + (4 * (x))) /* Capture value */ +#define PWM_CPT_EDGE(x) (0x30 + (4 * (x))) /* Edge to capture on */ #define STI_PWM_CTRL 0x50 /* Control/Config register */ #define STI_INT_EN 0x54 /* Interrupt Enable/Disable register */ +#define STI_INT_STA 0x58 /* Interrupt Status register */ +#define PWM_INT_ACK 0x5c #define PWM_PRESCALE_LOW_MASK 0x0f #define PWM_PRESCALE_HIGH_MASK 0xf0 +#define PWM_CPT_EDGE_MASK 0x03 +#define PWM_INT_ACK_MASK 0x1ff + +#define STI_MAX_CPT_DEVS 4 +#define CPT_DC_MAX 0xff /* Regfield IDs */ enum { /* Bits in PWM_CTRL*/ PWMCLK_PRESCALE_LOW, PWMCLK_PRESCALE_HIGH, + CPTCLK_PRESCALE, PWM_OUT_EN, + PWM_CPT_EN, PWM_CPT_INT_EN, + PWM_CPT_INT_STAT, /* Keep last */ MAX_REGFIELDS }; +/* Each capture input can be programmed to detect rising-edge, falling-edge, + * either edge or neither egde + */ +enum sti_cpt_edge { + CPT_EDGE_DISABLED, + CPT_EDGE_RISING, + CPT_EDGE_FALLING, + CPT_EDGE_BOTH, +}; + struct sti_pwm_compat_data { const struct reg_field *reg_fields; unsigned int num_devs; @@ -69,8 +91,11 @@ struct sti_pwm_chip { static const struct reg_field sti_pwm_regfields[MAX_REGFIELDS] = { [PWMCLK_PRESCALE_LOW] = REG_FIELD(STI_PWM_CTRL, 0, 3), [PWMCLK_PRESCALE_HIGH] = REG_FIELD(STI_PWM_CTRL, 11, 14), + [CPTCLK_PRESCALE] = REG_FIELD(STI_PWM_CTRL, 4, 8), [PWM_OUT_EN] = REG_FIELD(STI_PWM_CTRL, 9, 9), + [PWM_CPT_EN] = REG_FIELD(STI_PWM_CTRL, 10, 10), [PWM_CPT_INT_EN] = REG_FIELD(STI_INT_EN, 1, 4), + [PWM_CPT_INT_STAT] = REG_FIELD(STI_INT_STA, 1, 4), }; static inline struct sti_pwm_chip *to_sti_pwmchip(struct pwm_chip *chip) |
