From: Siarhei Volkau <[email protected]> This patch introduce the sun6i PWM driver itself: - sun6i register operations, - sun6i prescaler table, - DT bindings for A31 SoC, - documentation update.
Signed-off-by: Siarhei Volkau <[email protected]> --- .../devicetree/bindings/pwm/pwm-sun4i.txt | 3 +- drivers/pwm/pwm-sun4i.c | 71 ++++++++++++++++++++++ 2 files changed, 73 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/pwm/pwm-sun4i.txt b/Documentation/devicetree/bindings/pwm/pwm-sun4i.txt index f1cbeef..b737934 100644 --- a/Documentation/devicetree/bindings/pwm/pwm-sun4i.txt +++ b/Documentation/devicetree/bindings/pwm/pwm-sun4i.txt @@ -1,10 +1,11 @@ -Allwinner sun4i and sun7i SoC PWM controller +Allwinner sun4i, sun6i 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,sun6i-a31-pwm" - "allwinner,sun7i-a20-pwm" - "allwinner,sun8i-h3-pwm" - reg: physical base address and length of the controller's registers diff --git a/drivers/pwm/pwm-sun4i.c b/drivers/pwm/pwm-sun4i.c index 39912fc..0c1c372 100644 --- a/drivers/pwm/pwm-sun4i.c +++ b/drivers/pwm/pwm-sun4i.c @@ -47,6 +47,12 @@ #define BIT_CH(bit, chan) ((bit) << ((chan) * PWMCH_OFFSET)) +#define SUN6I_PWM_RDY_BIT PWM_RDY_BASE +#define SUN6I_PWM_CTL_OFFS 0x0 +#define SUN6I_PWM_PRD_OFFS 0x4 +#define SUN6I_PWM_CH_CTL(ch) (0x10 * (ch) + SUN6I_PWM_CTL_OFFS) +#define SUN6I_PWM_CH_PRD(ch) (0x10 * (ch) + SUN6I_PWM_PRD_OFFS) + struct sun4i_pwm_chip; static const u32 sun4i_prescaler_table[] = { @@ -68,6 +74,25 @@ static const u32 sun4i_prescaler_table[] = { 0, /* Actually 1 but tested separately */ }; +static const u32 sun6i_prescaler_table[] = { + 1, + 2, + 4, + 8, + 16, + 32, + 64, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, +}; + struct sunxi_reg_ops { int (*ctl_rdy)(struct sun4i_pwm_chip *chip, int npwm); u32 (*ctl_read)(struct sun4i_pwm_chip *chip, int npwm); @@ -140,6 +165,33 @@ static void sun4i_reg_prd_write(struct sun4i_pwm_chip *chip, int npwm, u32 val) sun4i_pwm_writel(chip, val, PWM_CH_PRD(npwm)); } +static int sun6i_reg_ctl_rdy(struct sun4i_pwm_chip *chip, int npwm) +{ + u32 val = sun4i_pwm_readl(chip, SUN6I_PWM_CH_CTL(npwm)); + + return val & BIT(SUN6I_PWM_RDY_BIT); +} + +static u32 sun6i_reg_ctl_read(struct sun4i_pwm_chip *chip, int npwm) +{ + return sun4i_pwm_readl(chip, SUN6I_PWM_CH_CTL(npwm)); +} + +static void sun6i_reg_ctl_write(struct sun4i_pwm_chip *chip, int npwm, u32 val) +{ + return sun4i_pwm_writel(chip, val, SUN6I_PWM_CH_CTL(npwm)); +} + +static u32 sun6i_reg_prd_read(struct sun4i_pwm_chip *chip, int npwm) +{ + return sun4i_pwm_readl(chip, SUN6I_PWM_CH_PRD(npwm)); +} + +static void sun6i_reg_prd_write(struct sun4i_pwm_chip *chip, int npwm, u32 val) +{ + return sun4i_pwm_writel(chip, val, SUN6I_PWM_CH_PRD(npwm)); +} + static int sun4i_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm, int duty_ns, int period_ns) { @@ -306,6 +358,14 @@ static const struct sunxi_reg_ops sun4i_reg_ops = { .prd_write = sun4i_reg_prd_write, }; +static const struct sunxi_reg_ops sun6i_reg_ops = { + .ctl_rdy = sun6i_reg_ctl_rdy, + .ctl_read = sun6i_reg_ctl_read, + .ctl_write = sun6i_reg_ctl_write, + .prd_read = sun6i_reg_prd_read, + .prd_write = sun6i_reg_prd_write, +}; + static const struct pwm_ops sun4i_pwm_ops = { .config = sun4i_pwm_config, .set_polarity = sun4i_pwm_set_polarity, @@ -338,6 +398,14 @@ static const struct sun4i_pwm_data sun4i_pwm_data_a13 = { .prescaler_table = sun4i_prescaler_table, }; +static const struct sun4i_pwm_data sun6i_pwm_data_a31 = { + .has_prescaler_bypass = false, + .has_rdy = true, + .npwm = 4, + .ops = &sun6i_reg_ops, + .prescaler_table = sun6i_prescaler_table, +}; + static const struct sun4i_pwm_data sun4i_pwm_data_a20 = { .has_prescaler_bypass = true, .has_rdy = true, @@ -365,6 +433,9 @@ static const struct of_device_id sun4i_pwm_dt_ids[] = { .compatible = "allwinner,sun5i-a13-pwm", .data = &sun4i_pwm_data_a13, }, { + .compatible = "allwinner,sun6i-a31-pwm", + .data = &sun6i_pwm_data_a31, + }, { .compatible = "allwinner,sun7i-a20-pwm", .data = &sun4i_pwm_data_a20, }, { -- 2.4.11
