kevin/linux
1
Fork 0
Code

pwm: meson: Add support for Amlogic S4 PWM

Browse Source 
Add support for Amlogic S4 PWM.

Signed-off-by: Junyi Zhao <junyi.zhao@amlogic.com>
Signed-off-by: Kelvin Zhang <kelvin.zhang@amlogic.com>
Reviewed-by: George Stark <gnstark@salutedevices.com>
Link: https://lore.kernel.org/r/20240613-s4-pwm-v8-1-b5bd0a768282@amlogic.com
Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
This commit is contained in:
Junyi Zhao 2024-06-13 19:46:35 +08:00 committed by Uwe Kleine-König
parent 7f61257cd6
commit 2ed3284f31
1 changed files with 39 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
drivers/pwm/pwm-meson.c
View File

@ -460,6 +460,37 @@ static int meson_pwm_init_channels_meson8b_v2(struct pwm_chip *chip)
return meson_pwm_init_clocks_meson8b(chip, mux_parent_data);
}
static void meson_pwm_s4_put_clk(void *data)
{
struct clk *clk = data;
clk_put(clk);
}
static int meson_pwm_init_channels_s4(struct pwm_chip *chip)
{
struct device *dev = pwmchip_parent(chip);
struct device_node *np = dev->of_node;
struct meson_pwm *meson = to_meson_pwm(chip);
int i, ret;
for (i = 0; i < MESON_NUM_PWMS; i++) {
meson->channels[i].clk = of_clk_get(np, i);
if (IS_ERR(meson->channels[i].clk))
return dev_err_probe(dev,
PTR_ERR(meson->channels[i].clk),
"Failed to get clk\n");
ret = devm_add_action_or_reset(dev, meson_pwm_s4_put_clk,
meson->channels[i].clk);
if (ret)
return dev_err_probe(dev, ret,
"Failed to add clk_put action\n");
}
return 0;
}
static const struct meson_pwm_data pwm_meson8b_data = {
.parent_names = { "xtal", NULL, "fclk_div4", "fclk_div3" },
.channels_init = meson_pwm_init_channels_meson8b_legacy,
@ -498,6 +529,10 @@ static const struct meson_pwm_data pwm_meson8_v2_data = {
.channels_init = meson_pwm_init_channels_meson8b_v2,
};
static const struct meson_pwm_data pwm_s4_data = {
.channels_init = meson_pwm_init_channels_s4,
};
static const struct of_device_id meson_pwm_matches[] = {
{
.compatible = "amlogic,meson8-pwm-v2",
@ -536,6 +571,10 @@ static const struct of_device_id meson_pwm_matches[] = {
.compatible = "amlogic,meson-g12a-ao-pwm-cd",
.data = &pwm_g12a_ao_cd_data
},
{
.compatible = "amlogic,meson-s4-pwm",
.data = &pwm_s4_data
},
{},
};
MODULE_DEVICE_TABLE(of, meson_pwm_matches);