diff options
| author | David Wu <david.wu@rock-chips.com> | 2017-09-20 14:37:50 +0800 |
|---|---|---|
| committer | Philipp Tomsich <philipp.tomsich@theobroma-systems.com> | 2017-10-01 00:33:30 +0200 |
| commit | 615514c16dee4d43bd584ea326a5a56ebcb89c85 (patch) | |
| tree | c9a66b0378ef68ef7f9273b4598d0143cb7d5a1c /drivers/clk | |
| parent | b375d84135e26d5ec5034a515af4df5981785f37 (diff) | |
rockchip: clk: Add rk3368 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 <david.wu@rock-chips.com>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Diffstat (limited to 'drivers/clk')
| -rw-r--r-- | drivers/clk/rockchip/clk_rk3368.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/clk/rockchip/clk_rk3368.c b/drivers/clk/rockchip/clk_rk3368.c index e2747816b9..3a12be7728 100644 --- a/drivers/clk/rockchip/clk_rk3368.c +++ b/drivers/clk/rockchip/clk_rk3368.c @@ -12,6 +12,7 @@ #include <errno.h> #include <mapmem.h> #include <syscon.h> +#include <bitfield.h> #include <asm/arch/clock.h> #include <asm/arch/cru_rk3368.h> #include <asm/arch/hardware.h> @@ -397,6 +398,31 @@ static ulong rk3368_spi_set_clk(struct rk3368_cru *cru, ulong clk_id, uint hz) return rk3368_spi_get_clk(cru, clk_id); } +static ulong rk3368_saradc_get_clk(struct rk3368_cru *cru) +{ + u32 div, val; + + val = readl(&cru->clksel_con[25]); + div = bitfield_extract(val, CLK_SARADC_DIV_CON_SHIFT, + CLK_SARADC_DIV_CON_WIDTH); + + return DIV_TO_RATE(OSC_HZ, div); +} + +static ulong rk3368_saradc_set_clk(struct rk3368_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[25], + CLK_SARADC_DIV_CON_MASK, + src_clk_div << CLK_SARADC_DIV_CON_SHIFT); + + return rk3368_saradc_get_clk(cru); +} + static ulong rk3368_clk_get_rate(struct clk *clk) { struct rk3368_clk_priv *priv = dev_get_priv(clk->dev); @@ -419,6 +445,9 @@ static ulong rk3368_clk_get_rate(struct clk *clk) rate = rk3368_mmc_get_clk(priv->cru, clk->id); break; #endif + case SCLK_SARADC: + rate = rk3368_saradc_get_clk(priv->cru); + break; default: return -ENOENT; } @@ -453,6 +482,9 @@ static ulong rk3368_clk_set_rate(struct clk *clk, ulong rate) ret = rk3368_gmac_set_clk(priv->cru, clk->id, rate); break; #endif + case SCLK_SARADC: + ret = rk3368_saradc_set_clk(priv->cru, rate); + break; default: return -ENOENT; } |