[PATCH 2/2] pwm: meson: Add support for Amlogic S7
From: Xianwei Zhao via B4 Relay <devnull+xianwei.zhao.amlogic.com@kernel.org>
Date: 2026-03-26 06:35:47
Also in:
b4-sent, linux-amlogic, linux-devicetree, linux-pwm, lkml
Subsystem:
pwm subsystem, the rest · Maintainers:
Uwe Kleine-König, Linus Torvalds
From: Xianwei Zhao <xianwei.zhao@amlogic.com> Add support for Amlogic S7 PWM. Amlogic S7 different from the previous SoCs, a controller includes one pwm, at the same time, the controller has only one input clock source. Signed-off-by: Xianwei Zhao <xianwei.zhao@amlogic.com> --- drivers/pwm/pwm-meson.c | 32 ++++++++++++++++++++++++++++++-- 1 file changed, 30 insertions(+), 2 deletions(-)
diff --git a/drivers/pwm/pwm-meson.c b/drivers/pwm/pwm-meson.c
index 8c6bf3d49753..3d16694e254e 100644
--- a/drivers/pwm/pwm-meson.c
+++ b/drivers/pwm/pwm-meson.c@@ -113,6 +113,7 @@ struct meson_pwm_data { int (*channels_init)(struct pwm_chip *chip); bool has_constant; bool has_polarity; + bool single_pwm; }; struct meson_pwm {
@@ -503,6 +504,18 @@ static void meson_pwm_s4_put_clk(void *data) clk_put(clk); } +static int meson_pwm_init_channels_s7(struct pwm_chip *chip) +{ + struct device *dev = pwmchip_parent(chip); + struct meson_pwm *meson = to_meson_pwm(chip); + + meson->channels[0].clk = devm_clk_get(dev, NULL); + if (IS_ERR(meson->channels[0].clk)) + return dev_err_probe(dev, PTR_ERR(meson->channels[0].clk), + "Failed to get clk\n"); + return 0; +} + static int meson_pwm_init_channels_s4(struct pwm_chip *chip) { struct device *dev = pwmchip_parent(chip);
@@ -592,6 +605,13 @@ static const struct meson_pwm_data pwm_s4_data = { .has_polarity = true, }; +static const struct meson_pwm_data pwm_s7_data = { + .channels_init = meson_pwm_init_channels_s7, + .has_constant = true, + .has_polarity = true, + .single_pwm = true, +}; + static const struct of_device_id meson_pwm_matches[] = { { .compatible = "amlogic,meson8-pwm-v2",
@@ -642,6 +662,10 @@ static const struct of_device_id meson_pwm_matches[] = { .compatible = "amlogic,meson-s4-pwm", .data = &pwm_s4_data }, + { + .compatible = "amlogic,s7-pwm", + .data = &pwm_s7_data + }, {}, }; MODULE_DEVICE_TABLE(of, meson_pwm_matches);
@@ -650,9 +674,13 @@ static int meson_pwm_probe(struct platform_device *pdev) { struct pwm_chip *chip; struct meson_pwm *meson; + const struct meson_pwm_data *pdata = of_device_get_match_data(&pdev->dev); int err; - chip = devm_pwmchip_alloc(&pdev->dev, MESON_NUM_PWMS, sizeof(*meson)); + if (pdata->single_pwm) + chip = devm_pwmchip_alloc(&pdev->dev, 1, sizeof(*meson)); + else + chip = devm_pwmchip_alloc(&pdev->dev, MESON_NUM_PWMS, sizeof(*meson)); if (IS_ERR(chip)) return PTR_ERR(chip); meson = to_meson_pwm(chip);
@@ -664,7 +692,7 @@ static int meson_pwm_probe(struct platform_device *pdev) spin_lock_init(&meson->lock); chip->ops = &meson_pwm_ops; - meson->data = of_device_get_match_data(&pdev->dev); + meson->data = pdata; err = meson->data->channels_init(chip); if (err < 0)
--
2.52.0