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Commit 0b330e38 authored by Dong Aisheng's avatar Dong Aisheng Committed by Ulf Hansson
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mmc: sdhci-esdhc-imx: enable hw auto retuning for STD_TUNING 



Enable HW auto retuning when set SDHCI_CTRL_EXEC_TUNING and clear it
when clear SDHCI_CTRL_TUNED_CLK.

Acked-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Signed-off-by: default avatarDong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent f37b20eb

drivers/mmc/host/sdhci-esdhc-imx.c

+3 −0
Original line number Diff line number Diff line
@@ -45,6 +45,7 @@ 
#define  ESDHC_MIX_CTRL_AC23EN		(1 << 7)

#define  ESDHC_MIX_CTRL_EXE_TUNE	(1 << 22)

#define  ESDHC_MIX_CTRL_SMPCLK_SEL	(1 << 23)

#define  ESDHC_MIX_CTRL_AUTO_TUNE_EN	(1 << 24)

#define  ESDHC_MIX_CTRL_FBCLK_SEL	(1 << 25)

#define  ESDHC_MIX_CTRL_HS400_EN	(1 << 26)

/* Bits 3 and 6 are not SDHCI standard definitions */
@@ -485,11 +486,13 @@ static void esdhc_writew_le(struct sdhci_host *host, u16 val, int reg) 
			} else {

				v &= ~ESDHC_MIX_CTRL_SMPCLK_SEL;

				m &= ~ESDHC_MIX_CTRL_FBCLK_SEL;

				m &= ~ESDHC_MIX_CTRL_AUTO_TUNE_EN;

			}



			if (val & SDHCI_CTRL_EXEC_TUNING) {

				v |= ESDHC_MIX_CTRL_EXE_TUNE;

				m |= ESDHC_MIX_CTRL_FBCLK_SEL;

				m |= ESDHC_MIX_CTRL_AUTO_TUNE_EN;

				tuning_ctrl = readl(host->ioaddr + ESDHC_TUNING_CTRL);

				tuning_ctrl |= ESDHC_STD_TUNING_EN | ESDHC_TUNING_START_TAP_DEFAULT;

				if (imx_data->boarddata.tuning_start_tap) {