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Subject[PATCH v3 4/4] pwm: jz4740: Add support for the JZ4725B
Date
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>
---

Notes:
v2: Simply return -EINVAL if we can't get match data
v3: No change

drivers/pwm/pwm-jz4740.c | 24 ++++++++++++++++++++----
1 file changed, 20 insertions(+), 4 deletions(-)

diff --git a/drivers/pwm/pwm-jz4740.c b/drivers/pwm/pwm-jz4740.c
index fe06ca8ce30f..5830ac2bdf6a 100644
--- a/drivers/pwm/pwm-jz4740.c
+++ b/drivers/pwm/pwm-jz4740.c
@@ -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);
--
2.26.2
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