diff options
| author | Uwe Kleine-König <uwe@kleine-koenig.org> | 2019-08-24 02:10:37 +0200 |
|---|---|---|
| committer | Thierry Reding <thierry.reding@gmail.com> | 2020-01-08 13:43:00 +0100 |
| commit | ff55e7a314143e717f4d96271b541c29111502df (patch) | |
| tree | 858810d2f5d29c0cbc31a48805de31de5af5efa4 /drivers/pwm/pwm-atmel.c | |
| parent | pwm: atmel: Add a hint where to find hardware documentation (diff) | |
| download | linux-ff55e7a314143e717f4d96271b541c29111502df.tar.xz linux-ff55e7a314143e717f4d96271b541c29111502df.zip | |
pwm: atmel: Use a constant for maximum prescale value
The maximal prescale value is 10 for all supported variants. So drop the
member in the variant description and introduce a global constant
instead.
This reduces the size of the variant descriptions and the .apply()
callback can be compiled a bit more effectively.
Acked-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Diffstat (limited to 'drivers/pwm/pwm-atmel.c')
| -rw-r--r-- | drivers/pwm/pwm-atmel.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/drivers/pwm/pwm-atmel.c b/drivers/pwm/pwm-atmel.c index cd6be47b5160..199255b26aaa 100644 --- a/drivers/pwm/pwm-atmel.c +++ b/drivers/pwm/pwm-atmel.c @@ -50,6 +50,8 @@ #define PWMV2_CPRD 0x0C #define PWMV2_CPRDUPD 0x10 +#define PWM_MAX_PRES 10 + struct atmel_pwm_registers { u8 period; u8 period_upd; @@ -59,7 +61,6 @@ struct atmel_pwm_registers { struct atmel_pwm_config { u32 max_period; - u32 max_pres; }; struct atmel_pwm_data { @@ -126,7 +127,7 @@ static int atmel_pwm_calculate_cprd_and_pres(struct pwm_chip *chip, for (*pres = 0; cycles > atmel_pwm->data->cfg.max_period; cycles >>= 1) (*pres)++; - if (*pres > atmel_pwm->data->cfg.max_pres) { + if (*pres > PWM_MAX_PRES) { dev_err(chip->dev, "pres exceeds the maximum value\n"); return -EINVAL; } @@ -289,7 +290,6 @@ static const struct atmel_pwm_data atmel_sam9rl_pwm_data = { .cfg = { /* 16 bits to keep period and duty. */ .max_period = 0xffff, - .max_pres = 10, }, }; @@ -303,7 +303,6 @@ static const struct atmel_pwm_data atmel_sama5_pwm_data = { .cfg = { /* 16 bits to keep period and duty. */ .max_period = 0xffff, - .max_pres = 10, }, }; @@ -317,7 +316,6 @@ static const struct atmel_pwm_data mchp_sam9x60_pwm_data = { .cfg = { /* 32 bits to keep period and duty. */ .max_period = 0xffffffff, - .max_pres = 10, }, }; |