[v4,3/9] pwm: sunxi: Selectable prescaler table.

Submitted by lis8215@gmail.com on Feb. 24, 2017, 5:41 a.m.

Details

Message ID 1487914876-8594-4-git-send-email-lis8215@gmail.com
State New
Headers show

Commit Message

lis8215@gmail.com Feb. 24, 2017, 5:41 a.m.
From: Siarhei Volkau <lis8215@gmail.com>

A31 SoC have a different set of prescalers than sun4i
compatible ASoCs, but its position and count in the control
register are the same.

This patch make the table of prescalers customizable.

Signed-off-by: Siarhei Volkau <lis8215@gmail.com>
---
 drivers/pwm/pwm-sun4i.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

Comments

Maxime Ripard Feb. 27, 2017, 9:28 a.m.
On Fri, Feb 24, 2017 at 08:41:10AM +0300, lis8215@gmail.com wrote:
> From: Siarhei Volkau <lis8215@gmail.com>
> 
> A31 SoC have a different set of prescalers than sun4i
> compatible ASoCs, but its position and count in the control
> register are the same.
> 
> This patch make the table of prescalers customizable.
> 
> Signed-off-by: Siarhei Volkau <lis8215@gmail.com>

Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>

Thanks,
Maxime

Patch hide | download patch | download mbox

diff --git a/drivers/pwm/pwm-sun4i.c b/drivers/pwm/pwm-sun4i.c
index 7af6bd8..418a625 100644
--- a/drivers/pwm/pwm-sun4i.c
+++ b/drivers/pwm/pwm-sun4i.c
@@ -60,7 +60,7 @@  enum {
 	NUM_FIELDS,
 };
 
-static const u32 prescaler_table[] = {
+static const u32 sun4i_prescaler_table[] = {
 	120,
 	180,
 	240,
@@ -83,6 +83,7 @@  struct sun4i_pwm_data {
 	bool has_prescaler_bypass;
 	bool has_rdy;
 	unsigned int npwm;
+	const u32 *prescaler_table;
 };
 
 struct sun4i_pwm_chip {
@@ -104,6 +105,7 @@  static int sun4i_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
 {
 	struct sun4i_pwm_chip *sun4i_pwm = to_sun4i_pwm_chip(chip);
 	struct regmap_field **chan_fields = sun4i_pwm->fields[pwm->hwpwm];
+	const u32 *prescaler_table = sun4i_pwm->data->prescaler_table;
 	u32 prd, dty, val, clk_gate;
 	u64 clk_rate, div = 0;
 	unsigned int prescaler = 0;
@@ -310,30 +312,35 @@  static const struct sun4i_pwm_data sun4i_pwm_data_a10 = {
 	.has_prescaler_bypass = false,
 	.has_rdy = false,
 	.npwm = 2,
+	.prescaler_table = sun4i_prescaler_table,
 };
 
 static const struct sun4i_pwm_data sun4i_pwm_data_a10s = {
 	.has_prescaler_bypass = true,
 	.has_rdy = true,
 	.npwm = 2,
+	.prescaler_table = sun4i_prescaler_table,
 };
 
 static const struct sun4i_pwm_data sun4i_pwm_data_a13 = {
 	.has_prescaler_bypass = true,
 	.has_rdy = true,
 	.npwm = 1,
+	.prescaler_table = sun4i_prescaler_table,
 };
 
 static const struct sun4i_pwm_data sun4i_pwm_data_a20 = {
 	.has_prescaler_bypass = true,
 	.has_rdy = true,
 	.npwm = 2,
+	.prescaler_table = sun4i_prescaler_table,
 };
 
 static const struct sun4i_pwm_data sun4i_pwm_data_h3 = {
 	.has_prescaler_bypass = true,
 	.has_rdy = true,
 	.npwm = 1,
+	.prescaler_table = sun4i_prescaler_table,
 };
 
 static const struct of_device_id sun4i_pwm_dt_ids[] = {