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mmc: am654_sdhci: Unconditionally switch off DLL in the beginning of ios_post()

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There are some speed modes that work without switching the dll on.
Unconditionally switch off the DLL before setting clock frequency to
support this case. The software will automatically enable DLL for speed
modes that require it. This also means the dll_on priv data member is no
longer required.

Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Signed-off-by: Aswath Govindraju <a-govindraju@ti.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
This commit is contained in:
Faiz Abbas 2021-02-04 15:10:47 +05:30 committed by Lokesh Vutla
parent 43392b550e
commit c604e204ef
1 changed files with 1 additions and 9 deletions
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10
drivers/mmc/am654_sdhci.c
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@ -84,7 +84,6 @@ struct am654_sdhci_plat {
#define IOMUX_PRESENT (1 << 1)
#define FREQSEL_2_BIT (1 << 2)
#define STRBSEL_4_BIT (1 << 3)
bool dll_on;
};
struct timing_data {
@ -141,12 +140,7 @@ static int am654_sdhci_set_ios_post(struct sdhci_host *host)
val &= ~SDHCI_CLOCK_CARD_EN;
sdhci_writew(host, val, SDHCI_CLOCK_CONTROL);
/* power off phy */
if (plat->dll_on) {
regmap_update_bits(plat->base, PHY_CTRL1, ENDLL_MASK, 0);
plat->dll_on = false;
}
regmap_update_bits(plat->base, PHY_CTRL1, ENDLL_MASK, 0);
/* restart clock */
sdhci_set_clock(host->mmc, speed);
@ -212,8 +206,6 @@ static int am654_sdhci_set_ios_post(struct sdhci_host *host)
val & DLLRDY_MASK, 1000, 1000000);
if (ret)
return ret;
plat->dll_on = true;
}
return 0;