[PATCH v2 2/4] ARM: pwm: sun4i: selectable prescaler table for support sun6i.
From: lis8215 at gmail.com <hidden>
Date: 2017-02-07 17:51:19
Also in:
linux-devicetree, linux-pwm, lkml
Subsystem:
pwm subsystem, the rest · Maintainers:
Uwe Kleine-König, Linus Torvalds
From: Siarhei Volkau <redacted> This patch not introduce new features, just prepare code for adding sun6i PWM driver in next commit. A31 SoC have a different set of prescalers than others 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 <redacted> --- drivers/pwm/pwm-sun4i.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/pwm/pwm-sun4i.c b/drivers/pwm/pwm-sun4i.c
index 04ad3b4..39912fc 100644
--- a/drivers/pwm/pwm-sun4i.c
+++ b/drivers/pwm/pwm-sun4i.c@@ -49,7 +49,7 @@ struct sun4i_pwm_chip; -static const u32 prescaler_table[] = { +static const u32 sun4i_prescaler_table[] = { 120, 180, 240,
@@ -81,6 +81,7 @@ struct sun4i_pwm_data { bool has_rdy; unsigned int npwm; const struct sunxi_reg_ops *ops; + const u32 *prescaler_table; }; struct sun4i_pwm_chip {
@@ -144,6 +145,7 @@ static int sun4i_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm, { struct sun4i_pwm_chip *sun4i_pwm = to_sun4i_pwm_chip(chip); const struct sunxi_reg_ops *reg_ops = sun4i_pwm->data->ops; + const u32 *prescaler_table = sun4i_pwm->data->prescaler_table; u32 prd, dty, val, clk_gate; u64 clk_rate, div = 0; unsigned int prescaler = 0;
@@ -317,6 +319,7 @@ static const struct sun4i_pwm_data sun4i_pwm_data_a10 = { .has_rdy = false, .npwm = 2, .ops = &sun4i_reg_ops, + .prescaler_table = sun4i_prescaler_table, }; static const struct sun4i_pwm_data sun4i_pwm_data_a10s = {
@@ -324,6 +327,7 @@ static const struct sun4i_pwm_data sun4i_pwm_data_a10s = { .has_rdy = true, .npwm = 2, .ops = &sun4i_reg_ops, + .prescaler_table = sun4i_prescaler_table, }; static const struct sun4i_pwm_data sun4i_pwm_data_a13 = {
@@ -331,6 +335,7 @@ static const struct sun4i_pwm_data sun4i_pwm_data_a13 = { .has_rdy = true, .npwm = 1, .ops = &sun4i_reg_ops, + .prescaler_table = sun4i_prescaler_table, }; static const struct sun4i_pwm_data sun4i_pwm_data_a20 = {
@@ -338,6 +343,7 @@ static const struct sun4i_pwm_data sun4i_pwm_data_a20 = { .has_rdy = true, .npwm = 2, .ops = &sun4i_reg_ops, + .prescaler_table = sun4i_prescaler_table, }; static const struct sun4i_pwm_data sun4i_pwm_data_h3 = {
@@ -345,6 +351,7 @@ static const struct sun4i_pwm_data sun4i_pwm_data_h3 = { .has_rdy = true, .npwm = 1, .ops = &sun4i_reg_ops, + .prescaler_table = sun4i_prescaler_table, }; static const struct of_device_id sun4i_pwm_dt_ids[] = {
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2.4.11