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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: Hans de Goede <hdegoede@redhat.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
This commit is contained in:
Hans de Goede 2015-10-11 11:49:57 +02:00 committed by Thierry Reding
parent d1cd214277
commit f6649f7ad8
2 changed files with 25 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/devicetree/bindings/pwm/pwm-sun4i.txt
View File

@ -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

25
drivers/pwm/pwm-sun4i.c
View File

@ -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);