Commit ff55e7a3 authored by Uwe Kleine-König's avatar Uwe Kleine-König Committed by Thierry Reding
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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: default avatarClaudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: default avatarUwe Kleine-König <uwe@kleine-koenig.org>
Signed-off-by: default avatarThierry Reding <thierry.reding@gmail.com>
parent 3c269ba6

drivers/pwm/pwm-atmel.c

+3 −5
Original line number Diff line number Diff line
@@ -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,

	},

};