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Commit f6649f7a authored by Hans de Goede's avatar Hans de Goede Committed by Thierry Reding
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pwm: sun4i: Add support for PWM controller on sun5i SoCs 



The PWM controller on sun5i SoCs is identical to the one found on sun7i
SoCs. On the A13 package only one of the 2 pins is routed to the outside,
so only advertise one PWM channel there.

Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
Acked-by: default avatarMaxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: default avatarThierry Reding <thierry.reding@gmail.com>
parent d1cd2142

Documentation/devicetree/bindings/pwm/pwm-sun4i.txt

+2 −0
Original line number Diff line number Diff line
@@ -3,6 +3,8 @@ Allwinner sun4i and sun7i SoC PWM controller 
Required properties:

  - compatible: should be one of:

    - "allwinner,sun4i-a10-pwm"

    - "allwinner,sun5i-a10s-pwm"

    - "allwinner,sun5i-a13-pwm"

    - "allwinner,sun7i-a20-pwm"

  - reg: physical base address and length of the controller's registers

  - #pwm-cells: should be 3. See pwm.txt in this directory for a description of

drivers/pwm/pwm-sun4i.c

+23 −2
Original line number Diff line number Diff line
@@ -68,6 +68,7 @@ static const u32 prescaler_table[] = { 
struct sun4i_pwm_data {

	bool has_prescaler_bypass;

	bool has_rdy;

	unsigned int npwm;

};



struct sun4i_pwm_chip {
@@ -262,17 +263,37 @@ static const struct pwm_ops sun4i_pwm_ops = { 
static const struct sun4i_pwm_data sun4i_pwm_data_a10 = {

	.has_prescaler_bypass = false,

	.has_rdy = false,

	.npwm = 2,

};



static const struct sun4i_pwm_data sun4i_pwm_data_a10s = {

	.has_prescaler_bypass = true,

	.has_rdy = true,

	.npwm = 2,

};



static const struct sun4i_pwm_data sun4i_pwm_data_a13 = {

	.has_prescaler_bypass = true,

	.has_rdy = true,

	.npwm = 1,

};



static const struct sun4i_pwm_data sun4i_pwm_data_a20 = {

	.has_prescaler_bypass = true,

	.has_rdy = true,

	.npwm = 2,

};



static const struct of_device_id sun4i_pwm_dt_ids[] = {

	{

		.compatible = "allwinner,sun4i-a10-pwm",

		.data = &sun4i_pwm_data_a10,

	}, {

		.compatible = "allwinner,sun5i-a10s-pwm",

		.data = &sun4i_pwm_data_a10s,

	}, {

		.compatible = "allwinner,sun5i-a13-pwm",

		.data = &sun4i_pwm_data_a13,

	}, {

		.compatible = "allwinner,sun7i-a20-pwm",

		.data = &sun4i_pwm_data_a20,
@@ -305,14 +326,14 @@ static int sun4i_pwm_probe(struct platform_device *pdev) 
	if (IS_ERR(pwm->clk))

		return PTR_ERR(pwm->clk);



	pwm->data = match->data;

	pwm->chip.dev = &pdev->dev;

	pwm->chip.ops = &sun4i_pwm_ops;

	pwm->chip.base = -1;

	pwm->chip.npwm = 2;

	pwm->chip.npwm = pwm->data->npwm;

	pwm->chip.can_sleep = true;

	pwm->chip.of_xlate = of_pwm_xlate_with_flags;

	pwm->chip.of_pwm_n_cells = 3;

	pwm->data = match->data;



	spin_lock_init(&pwm->ctrl_lock);