From 364fc7315aa0e6e20f604bb8b369b4bdc0dd8e8a Mon Sep 17 00:00:00 2001 From: David Wu Date: Wed, 20 Sep 2017 14:38:58 +0800 Subject: [PATCH] rockchip: clk: Add rk3399 SARADC clock support The clk_saradc is dividing from the 24M, clk_saradc=24MHz/(saradc_div_con+1). SARADC integer divider control register is 8-bits width. Signed-off-by: David Wu Acked-by: Philipp Tomsich Reviewed-by: Philipp Tomsich --- drivers/clk/rockchip/clk_rk3399.c | 36 ++++++++++++++++++++++++++++++- 1 file changed, 35 insertions(+), 1 deletion(-) diff --git a/drivers/clk/rockchip/clk_rk3399.c b/drivers/clk/rockchip/clk_rk3399.c index 9d963be552..50faf5d193 100644 --- a/drivers/clk/rockchip/clk_rk3399.c +++ b/drivers/clk/rockchip/clk_rk3399.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include #include @@ -181,7 +182,8 @@ enum { /* CLKSEL_CON26 */ CLK_SARADC_DIV_CON_SHIFT = 8, - CLK_SARADC_DIV_CON_MASK = 0xff << CLK_SARADC_DIV_CON_SHIFT, + CLK_SARADC_DIV_CON_MASK = GENMASK(15, 8), + CLK_SARADC_DIV_CON_WIDTH = 8, /* CLKSEL_CON27 */ CLK_TSADC_SEL_X24M = 0x0, @@ -860,6 +862,32 @@ static ulong rk3399_ddr_set_clk(struct rk3399_cru *cru, return set_rate; } + +static ulong rk3399_saradc_get_clk(struct rk3399_cru *cru) +{ + u32 div, val; + + val = readl(&cru->clksel_con[26]); + div = bitfield_extract(val, CLK_SARADC_DIV_CON_SHIFT, + CLK_SARADC_DIV_CON_WIDTH); + + return DIV_TO_RATE(OSC_HZ, div); +} + +static ulong rk3399_saradc_set_clk(struct rk3399_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[26], + CLK_SARADC_DIV_CON_MASK, + src_clk_div << CLK_SARADC_DIV_CON_SHIFT); + + return rk3399_saradc_get_clk(cru); +} + static ulong rk3399_clk_get_rate(struct clk *clk) { struct rk3399_clk_priv *priv = dev_get_priv(clk->dev); @@ -895,6 +923,9 @@ static ulong rk3399_clk_get_rate(struct clk *clk) break; case PCLK_EFUSE1024NS: break; + case SCLK_SARADC: + rate = rk3399_saradc_get_clk(priv->cru); + break; default: return -ENOENT; } @@ -943,6 +974,9 @@ static ulong rk3399_clk_set_rate(struct clk *clk, ulong rate) break; case PCLK_EFUSE1024NS: break; + case SCLK_SARADC: + ret = rk3399_saradc_set_clk(priv->cru, rate); + break; default: return -ENOENT; } -- 2.39.2