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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: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
This commit is contained in:
Paul Cercueil 2020-05-27 13:52:25 +02:00 committed by Thierry Reding
parent a020f22a4f
commit 74db728c0b
1 changed files with 20 additions and 4 deletions
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24
drivers/pwm/pwm-jz4740.c
View File

@ -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);