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mmc: dw_mmc-rockchip: Fix wrong internal phase calculate

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commit 739f04f4a4 upstream.

ciu clock is 2 times of io clock, but the sample clk used is
derived from io clock provided to the card. So we should use
io clock to calculate the phase.

Fixes: 59903441f5 ("mmc: dw_mmc-rockchip: Add internal phase support")
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Shawn Lin
2025-11-04 11:51:23 +08:00
committed by Greg Kroah-Hartman
parent 3b935c5353
commit a54ba4afb3
1 changed files with 2 additions and 2 deletions
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4
drivers/mmc/host/dw_mmc-rockchip.c
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@@ -43,7 +43,7 @@ struct dw_mci_rockchip_priv_data {
*/ */
static int rockchip_mmc_get_internal_phase(struct dw_mci *host, bool sample) static int rockchip_mmc_get_internal_phase(struct dw_mci *host, bool sample)
{ {
unsigned long rate = clk_get_rate(host->ciu_clk); unsigned long rate = clk_get_rate(host->ciu_clk) / RK3288_CLKGEN_DIV;
u32 raw_value; u32 raw_value;
u16 degrees; u16 degrees;
u32 delay_num = 0; u32 delay_num = 0;
@@ -86,7 +86,7 @@ static int rockchip_mmc_get_phase(struct dw_mci *host, bool sample)
static int rockchip_mmc_set_internal_phase(struct dw_mci *host, bool sample, int degrees) static int rockchip_mmc_set_internal_phase(struct dw_mci *host, bool sample, int degrees)
{ {
unsigned long rate = clk_get_rate(host->ciu_clk); unsigned long rate = clk_get_rate(host->ciu_clk) / RK3288_CLKGEN_DIV;
u8 nineties, remainder; u8 nineties, remainder;
u8 delay_num; u8 delay_num;
u32 raw_value; u32 raw_value;