[linux-sunxi] [PATCH v3 2/4] pwm: sunxi: Selectable prescaler table for support sun6i.

[lis8215]

From: Siarhei Volkau <lis8...@gmail.com>

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 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 <lis8...@gmail.com>
---
 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 7291000..b4706af 100644
--- a/drivers/pwm/pwm-sun4i.c
+++ b/drivers/pwm/pwm-sun4i.c
@@ -77,7 +77,7 @@
 }


-static const u32 prescaler_table[] = {
+static const u32 sun4i_prescaler_table[] = {
        120,
        180,
        240,
@@ -107,6 +107,7 @@ struct sun4i_pwm_data {
        bool has_prescaler_bypass;
        bool has_rdy;
        unsigned int npwm;
+       const u32 *prescaler_table;
        const struct sunxi_pwmch_reg_info *chan_info;
 };

@@ -129,6 +130,7 @@ 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, busy, clk_gate;
        u64 clk_rate, div = 0;
        unsigned int prescaler = 0;
@@ -328,6 +330,7 @@ static const struct sun4i_pwm_data sun4i_pwm_data_a10 = {
        .has_prescaler_bypass = false,
        .has_rdy = false,
        .npwm = 2,
+       .prescaler_table = sun4i_prescaler_table,
        .chan_info = sun4i_field_info,
 };

@@ -335,6 +338,7 @@ static const struct sun4i_pwm_data sun4i_pwm_data_a10s = {
        .has_prescaler_bypass = true,
        .has_rdy = true,
        .npwm = 2,
+       .prescaler_table = sun4i_prescaler_table,
        .chan_info = sun4i_field_info,
 };

@@ -342,6 +346,7 @@ static const struct sun4i_pwm_data sun4i_pwm_data_a13 = {
        .has_prescaler_bypass = true,
        .has_rdy = true,
        .npwm = 1,
+       .prescaler_table = sun4i_prescaler_table,
        .chan_info = sun4i_field_info,
 };

@@ -349,6 +354,7 @@ static const struct sun4i_pwm_data sun4i_pwm_data_a20 = {
        .has_prescaler_bypass = true,
        .has_rdy = true,
        .npwm = 2,
+       .prescaler_table = sun4i_prescaler_table,
        .chan_info = sun4i_field_info,
 };

@@ -356,6 +362,7 @@ static const struct sun4i_pwm_data sun4i_pwm_data_h3 = {
        .has_prescaler_bypass = true,
        .has_rdy = true,
        .npwm = 1,
+       .prescaler_table = sun4i_prescaler_table,
        .chan_info = sun4i_field_info,
 };

--
2.4.11

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