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rockchip: clk: update dwmmc clock div

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dwmmc controller has default internal divider by 2,
and we always provide double of the clock rate request by
dwmmc controller. Sync code for all Rockchip SoC with:
4055b46 rockchip: clk: rk3288: fix mmc clock setting

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
[fixup for 'missing DIV_ROUND_UP' conflict for clk_rk3288.c:]
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
This commit is contained in:
Kever Yang 2017-07-27 12:54:01 +08:00 • committed by Philipp Tomsich
parent 95ca100ba7
commit 3a94d75d0e
6 changed files with 26 additions and 19 deletions
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6
drivers/clk/rockchip/clk_rk3036.c
View file

@ -235,7 +235,7 @@ static ulong rockchip_mmc_get_clk(struct rk3036_cru *cru, uint clk_general_rate,
}
src_rate = mux == EMMC_SEL_24M ? OSC_HZ : clk_general_rate;
return DIV_TO_RATE(src_rate, div);
return DIV_TO_RATE(src_rate, div) / 2;
}
static ulong rockchip_mmc_set_clk(struct rk3036_cru *cru, uint clk_general_rate,
@ -247,10 +247,10 @@ static ulong rockchip_mmc_set_clk(struct rk3036_cru *cru, uint clk_general_rate,
debug("%s: clk_general_rate=%u\n", __func__, clk_general_rate);
/* mmc clock auto divide 2 in internal */
src_clk_div = (clk_general_rate / 2 + freq - 1) / freq;
src_clk_div = DIV_ROUND_UP(clk_general_rate / 2, freq);
if (src_clk_div > 0x7f) {
src_clk_div = (OSC_HZ / 2 + freq - 1) / freq;
src_clk_div = DIV_ROUND_UP(OSC_HZ / 2, freq);
mux = EMMC_SEL_24M;
} else {
mux = EMMC_SEL_GPLL;

5
drivers/clk/rockchip/clk_rk3188.c
View file

@ -287,7 +287,7 @@ static ulong rockchip_mmc_get_clk(struct rk3188_cru *cru, uint gclk_rate,
return -EINVAL;
}
return DIV_TO_RATE(gclk_rate, div);
return DIV_TO_RATE(gclk_rate, div) / 2;
}
static ulong rockchip_mmc_set_clk(struct rk3188_cru *cru, uint gclk_rate,
@ -296,7 +296,8 @@ static ulong rockchip_mmc_set_clk(struct rk3188_cru *cru, uint gclk_rate,
int src_clk_div;
debug("%s: gclk_rate=%u\n", __func__, gclk_rate);
src_clk_div = RATE_TO_DIV(gclk_rate, freq);
/* mmc clock defaulg div 2 internal, need provide double in cru */
src_clk_div = DIV_ROUND_UP(gclk_rate / 2, freq);
assert(src_clk_div <= 0x3f);
switch (periph) {

8
drivers/clk/rockchip/clk_rk322x.c
View file

@ -239,7 +239,7 @@ static ulong rockchip_mmc_get_clk(struct rk322x_cru *cru, uint clk_general_rate,
}
src_rate = mux == EMMC_SEL_24M ? OSC_HZ : clk_general_rate;
return DIV_TO_RATE(src_rate, div);
return DIV_TO_RATE(src_rate, div) / 2;
}
static ulong rockchip_mmc_set_clk(struct rk322x_cru *cru, uint clk_general_rate,
@ -250,11 +250,11 @@ static ulong rockchip_mmc_set_clk(struct rk322x_cru *cru, uint clk_general_rate,
debug("%s: clk_general_rate=%u\n", __func__, clk_general_rate);
/* mmc clock auto divide 2 in internal */
src_clk_div = (clk_general_rate / 2 + freq - 1) / freq;
/* mmc clock defaulg div 2 internal, need provide double in cru */
src_clk_div = DIV_ROUND_UP(clk_general_rate / 2, freq);
if (src_clk_div > 0x7f) {
src_clk_div = (OSC_HZ / 2 + freq - 1) / freq;
src_clk_div = DIV_ROUND_UP(OSC_HZ / 2, freq);
mux = EMMC_SEL_24M;
} else {
mux = EMMC_SEL_GPLL;

5
drivers/clk/rockchip/clk_rk3288.c
View file

@ -530,10 +530,11 @@ static ulong rockchip_mmc_set_clk(struct rk3288_cru *cru, uint gclk_rate,
int mux;
debug("%s: gclk_rate=%u\n", __func__, gclk_rate);
src_clk_div = RATE_TO_DIV(gclk_rate, freq);
/* mmc clock default div 2 internal, need provide double in cru */
src_clk_div = DIV_ROUND_UP(gclk_rate / 2, freq);
if (src_clk_div > 0x3f) {
src_clk_div = RATE_TO_DIV(OSC_HZ, freq);
src_clk_div = DIV_ROUND_UP(OSC_HZ / 2, freq);
mux = EMMC_PLL_SELECT_24MHZ;
assert((int)EMMC_PLL_SELECT_24MHZ ==
(int)MMC0_PLL_SELECT_24MHZ);

9
drivers/clk/rockchip/clk_rk3328.c
View file

@ -412,9 +412,9 @@ static ulong rk3328_mmc_get_clk(struct rk3328_cru *cru, uint clk_id)
if ((con & CLK_EMMC_PLL_MASK) >> CLK_EMMC_PLL_SHIFT
== CLK_EMMC_PLL_SEL_24M)
return DIV_TO_RATE(OSC_HZ, div);
return DIV_TO_RATE(OSC_HZ, div) / 2;
else
return DIV_TO_RATE(GPLL_HZ, div);
return DIV_TO_RATE(GPLL_HZ, div) / 2;
}
static ulong rk3328_mmc_set_clk(struct rk3328_cru *cru,
@ -436,11 +436,12 @@ static ulong rk3328_mmc_set_clk(struct rk3328_cru *cru,
return -EINVAL;
}
/* Select clk_sdmmc/emmc source from GPLL by default */
src_clk_div = GPLL_HZ / set_rate;
/* mmc clock defaulg div 2 internal, need provide double in cru */
src_clk_div = DIV_ROUND_UP(GPLL_HZ / 2, set_rate);
if (src_clk_div > 127) {
/* use 24MHz source for 400KHz clock */
src_clk_div = OSC_HZ / set_rate;
src_clk_div = DIV_ROUND_UP(OSC_HZ / 2, set_rate);
rk_clrsetreg(&cru->clksel_con[con_id],
CLK_EMMC_PLL_MASK | CLK_EMMC_DIV_CON_MASK,
CLK_EMMC_PLL_SEL_24M << CLK_EMMC_PLL_SHIFT |

12
drivers/clk/rockchip/clk_rk3399.c
View file

@ -750,18 +750,21 @@ static ulong rk3399_mmc_get_clk(struct rk3399_cru *cru, uint clk_id)
case HCLK_SDMMC:
case SCLK_SDMMC:
con = readl(&cru->clksel_con[16]);
/* dwmmc controller have internal div 2 */
div = 2;
break;
case SCLK_EMMC:
con = readl(&cru->clksel_con[21]);
div = 1;
break;
default:
return -EINVAL;
}
div = (con & CLK_EMMC_DIV_CON_MASK) >> CLK_EMMC_DIV_CON_SHIFT;
div *= (con & CLK_EMMC_DIV_CON_MASK) >> CLK_EMMC_DIV_CON_SHIFT;
if ((con & CLK_EMMC_PLL_MASK) >> CLK_EMMC_PLL_SHIFT
== CLK_EMMC_PLL_SEL_24M)
return DIV_TO_RATE(24*1000*1000, div);
return DIV_TO_RATE(OSC_HZ, div);
else
return DIV_TO_RATE(GPLL_HZ, div);
}
@ -776,11 +779,12 @@ static ulong rk3399_mmc_set_clk(struct rk3399_cru *cru,
case HCLK_SDMMC:
case SCLK_SDMMC:
/* Select clk_sdmmc source from GPLL by default */
src_clk_div = GPLL_HZ / set_rate;
/* mmc clock defaulg div 2 internal, provide double in cru */
src_clk_div = DIV_ROUND_UP(GPLL_HZ / 2, set_rate);
if (src_clk_div > 127) {
/* use 24MHz source for 400KHz clock */
src_clk_div = 24*1000*1000 / set_rate;
src_clk_div = DIV_ROUND_UP(OSC_HZ / 2, set_rate);
rk_clrsetreg(&cru->clksel_con[16],
CLK_EMMC_PLL_MASK | CLK_EMMC_DIV_CON_MASK,
CLK_EMMC_PLL_SEL_24M << CLK_EMMC_PLL_SHIFT |