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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>
steinar/wifi_calib_4_9_kernel
Lee Jones 2016-08-16 10:35:01 +01:00 committed by Thierry Reding
parent d81738b76f
commit f66d78faf2
1 changed files with 25 additions and 0 deletions
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25
drivers/pwm/pwm-sti.c
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@ -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)