Signed-off-by: David Wu david.wu@rock-chips.com --- drivers/clk/rockchip/clk_rk3288.c | 45 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+)
diff --git a/drivers/clk/rockchip/clk_rk3288.c b/drivers/clk/rockchip/clk_rk3288.c index 478195b..29652b0 100644 --- a/drivers/clk/rockchip/clk_rk3288.c +++ b/drivers/clk/rockchip/clk_rk3288.c @@ -111,6 +111,15 @@ enum { PERI_ACLK_DIV_SHIFT = 0, PERI_ACLK_DIV_MASK = 0x1f << PERI_ACLK_DIV_SHIFT,
+ /* + * CLKSEL24 + * saradc_div_con: + * clk_saradc=24MHz/(saradc_div_con+1) + */ + CLK_SARADC_DIV_CON_SHIFT = 8, + CLK_SARADC_DIV_CON_MASK = 0xff << CLK_SARADC_DIV_CON_SHIFT, + CLK_SARADC_DIV_CON_WIDTH = 8, + SOCSTS_DPLL_LOCK = 1 << 5, SOCSTS_APLL_LOCK = 1 << 6, SOCSTS_CPLL_LOCK = 1 << 7, @@ -131,6 +140,11 @@ static const struct pll_div apll_init_cfg = PLL_DIVISORS(APLL_HZ, 1, 1); static const struct pll_div gpll_init_cfg = PLL_DIVISORS(GPLL_HZ, 2, 2); static const struct pll_div cpll_init_cfg = PLL_DIVISORS(CPLL_HZ, 1, 2);
+static inline u32 extract_bits(u32 val, unsigned width, unsigned shift) +{ + return (val >> shift) & ((1 << width) - 1); +} + static int rkclk_set_pll(struct rk3288_cru *cru, enum rk_clk_id clk_id, const struct pll_div *div) { @@ -634,6 +648,31 @@ static ulong rockchip_spi_set_clk(struct rk3288_cru *cru, uint gclk_rate, return rockchip_spi_get_clk(cru, gclk_rate, periph); }
+static ulong rockchip_saradc_get_clk(struct rk3288_cru *cru) +{ + u32 div, val; + + val = readl(&cru->cru_clksel_con[24]); + div = extract_bits(val, CLK_SARADC_DIV_CON_WIDTH, + CLK_SARADC_DIV_CON_SHIFT); + + return DIV_TO_RATE(OSC_HZ, div); +} + +static ulong rockchip_saradc_set_clk(struct rk3288_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->cru_clksel_con[24], + CLK_SARADC_DIV_CON_MASK, + src_clk_div << CLK_SARADC_DIV_CON_SHIFT); + + return rockchip_saradc_get_clk(cru); +} + static ulong rk3288_clk_get_rate(struct clk *clk) { struct rk3288_clk_priv *priv = dev_get_priv(clk->dev); @@ -666,6 +705,9 @@ static ulong rk3288_clk_get_rate(struct clk *clk) return gclk_rate; case PCLK_PWM: return PD_BUS_PCLK_HZ; + case SCLK_SARADC: + new_rate = rockchip_saradc_get_clk(priv->cru); + break; default: return -ENOENT; } @@ -756,6 +798,9 @@ static ulong rk3288_clk_set_rate(struct clk *clk, ulong rate) new_rate = rate; break; #endif + case SCLK_SARADC: + new_rate = rockchip_saradc_set_clk(priv->cru, rate); + break; default: return -ENOENT; }