Commit 74db728c authored by Paul Cercueil's avatar Paul Cercueil Committed by Thierry Reding
Browse files

pwm: jz4740: Add support for the JZ4725B 



The PWM hardware in the JZ4725B works the same as in the JZ4740, but has
only six channels available.

Signed-off-by: default avatarPaul Cercueil <paul@crapouillou.net>
Signed-off-by: default avatarThierry Reding <thierry.reding@gmail.com>
parent a020f22a

drivers/pwm/pwm-jz4740.c

+20 −4
Original line number Diff line number Diff line
@@ -20,7 +20,9 @@ 
#include <linux/pwm.h>

#include <linux/regmap.h>



#define NUM_PWM 8

struct soc_info {

	unsigned int num_pwms;

};



struct jz4740_pwm_chip {

	struct pwm_chip chip;
@@ -36,7 +38,7 @@ static bool jz4740_pwm_can_use_chn(struct jz4740_pwm_chip *jz, 
				   unsigned int channel)

{

	/* Enable all TCU channels for PWM use by default except channels 0/1 */

	u32 pwm_channels_mask = GENMASK(NUM_PWM - 1, 2);

	u32 pwm_channels_mask = GENMASK(jz->chip.npwm - 1, 2);



	device_property_read_u32(jz->chip.dev->parent,

				 "ingenic,pwm-channels-mask",
@@ -226,6 +228,11 @@ static int jz4740_pwm_probe(struct platform_device *pdev) 
{

	struct device *dev = &pdev->dev;

	struct jz4740_pwm_chip *jz4740;

	const struct soc_info *info;



	info = device_get_match_data(dev);

	if (!info)

		return -EINVAL;



	jz4740 = devm_kzalloc(dev, sizeof(*jz4740), GFP_KERNEL);

	if (!jz4740)
@@ -239,7 +246,7 @@ static int jz4740_pwm_probe(struct platform_device *pdev) 


	jz4740->chip.dev = dev;

	jz4740->chip.ops = &jz4740_pwm_ops;

	jz4740->chip.npwm = NUM_PWM;

	jz4740->chip.npwm = info->num_pwms;

	jz4740->chip.base = -1;

	jz4740->chip.of_xlate = of_pwm_xlate_with_flags;

	jz4740->chip.of_pwm_n_cells = 3;
@@ -256,9 +263,18 @@ static int jz4740_pwm_remove(struct platform_device *pdev) 
	return pwmchip_remove(&jz4740->chip);

}



static const struct soc_info __maybe_unused jz4740_soc_info = {

	.num_pwms = 8,

};



static const struct soc_info __maybe_unused jz4725b_soc_info = {

	.num_pwms = 6,

};



#ifdef CONFIG_OF

static const struct of_device_id jz4740_pwm_dt_ids[] = {

	{ .compatible = "ingenic,jz4740-pwm", },

	{ .compatible = "ingenic,jz4740-pwm", .data = &jz4740_soc_info },

	{ .compatible = "ingenic,jz4725b-pwm", .data = &jz4725b_soc_info },

	{},

};

MODULE_DEVICE_TABLE(of, jz4740_pwm_dt_ids);