The clk_saradc is dividing from the 24M, clk_saradc=24MHz/(saradc_div_con+1). SARADC integer divider control register is 10-bits width.
Signed-off-by: David Wu david.wu@rock-chips.com Acked-by: Philipp Tomsich philipp.tomsich@theobroma-systems.com Reviewed-by: Philipp Tomsich philipp.tomsich@theobroma-systems.com ---
Changes in v3: None Changes in v2: - Use bitfield_extract - Use GENMASK
drivers/clk/rockchip/clk_rk3328.c | 35 ++++++++++++++++++++++++++++++++++- 1 file changed, 34 insertions(+), 1 deletion(-)
diff --git a/drivers/clk/rockchip/clk_rk3328.c b/drivers/clk/rockchip/clk_rk3328.c index c3a6650..540d910 100644 --- a/drivers/clk/rockchip/clk_rk3328.c +++ b/drivers/clk/rockchip/clk_rk3328.c @@ -5,6 +5,7 @@ */
#include <common.h> +#include <bitfield.h> #include <clk-uclass.h> #include <dm.h> #include <errno.h> @@ -114,7 +115,8 @@ enum {
/* CLKSEL_CON23 */ CLK_SARADC_DIV_CON_SHIFT = 0, - CLK_SARADC_DIV_CON_MASK = 0x3ff << CLK_SARADC_DIV_CON_SHIFT, + CLK_SARADC_DIV_CON_MASK = GENMASK(9, 0), + CLK_SARADC_DIV_CON_WIDTH = 10,
/* CLKSEL_CON24 */ CLK_PWM_PLL_SEL_CPLL = 0, @@ -478,6 +480,31 @@ static ulong rk3328_pwm_set_clk(struct rk3328_cru *cru, uint hz) return DIV_TO_RATE(GPLL_HZ, div); }
+static ulong rk3328_saradc_get_clk(struct rk3328_cru *cru) +{ + u32 div, val; + + val = readl(&cru->clksel_con[23]); + div = bitfield_extract(val, CLK_SARADC_DIV_CON_SHIFT, + CLK_SARADC_DIV_CON_WIDTH); + + return DIV_TO_RATE(OSC_HZ, div); +} + +static ulong rk3328_saradc_set_clk(struct rk3328_cru *cru, uint hz) +{ + int src_clk_div; + + src_clk_div = DIV_ROUND_UP(OSC_HZ, hz) - 1; + assert(src_clk_div < 128); + + rk_clrsetreg(&cru->clksel_con[23], + CLK_SARADC_DIV_CON_MASK, + src_clk_div << CLK_SARADC_DIV_CON_SHIFT); + + return rk3328_saradc_get_clk(cru); +} + static ulong rk3328_clk_get_rate(struct clk *clk) { struct rk3328_clk_priv *priv = dev_get_priv(clk->dev); @@ -501,6 +528,9 @@ static ulong rk3328_clk_get_rate(struct clk *clk) case SCLK_PWM: rate = rk3328_pwm_get_clk(priv->cru); break; + case SCLK_SARADC: + rate = rk3328_saradc_get_clk(priv->cru); + break; default: return -ENOENT; } @@ -531,6 +561,9 @@ static ulong rk3328_clk_set_rate(struct clk *clk, ulong rate) case SCLK_PWM: ret = rk3328_pwm_set_clk(priv->cru, rate); break; + case SCLK_SARADC: + ret = rk3328_saradc_set_clk(priv->cru, rate); + break; default: return -ENOENT; }