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mmc: am654_sdhci: Add flag for PHY calibration

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Not all controllers need calibration for the PHY DLL. Add a DLL_CALIB
flag to indicate the same.

Also move the write of trm_icp and driver strength to the set_clock()
function to match the kernel configuration flow.

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 15:10:49 +05:30 committed by Lokesh Vutla
parent 144e131d47
commit 5b29fd4a8d
1 changed files with 14 additions and 12 deletions
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26
drivers/mmc/am654_sdhci.c
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@ -84,6 +84,7 @@ struct am654_sdhci_plat {
#define IOMUX_PRESENT BIT(1)
#define FREQSEL_2_BIT BIT(2)
#define STRBSEL_4_BIT BIT(3)
#define DLL_CALIB BIT(4)
};
struct timing_data {
@ -195,6 +196,15 @@ static int am654_sdhci_set_ios_post(struct sdhci_host *host)
freqsel << FREQSEL_SHIFT);
}
/* Configure DLL TRIM */
mask = DLL_TRIM_ICP_MASK;
val = plat->trm_icp << DLL_TRIM_ICP_SHIFT;
/* Configure DLL driver strength */
mask |= DR_TY_MASK;
val |= plat->drv_strength << DR_TY_SHIFT;
regmap_update_bits(plat->base, PHY_CTRL1, mask, val);
/* Enable DLL */
regmap_update_bits(plat->base, PHY_CTRL1, ENDLL_MASK,
0x1 << ENDLL_SHIFT);
@ -221,7 +231,7 @@ int am654_sdhci_init(struct am654_sdhci_plat *plat)
mask = OTAPDLYENA_MASK | OTAPDLYSEL_MASK;
regmap_update_bits(plat->base, PHY_CTRL4, mask, 0x0);
if (plat->flags & DLL_PRESENT) {
if (plat->flags & DLL_CALIB) {
regmap_read(plat->base, PHY_STAT1, &val);
if (~val & CALDONE_MASK) {
/* Calibrate IO lines */
@ -233,15 +243,6 @@ int am654_sdhci_init(struct am654_sdhci_plat *plat)
if (ret)
return ret;
}
/* Configure DLL TRIM */
mask = DLL_TRIM_ICP_MASK;
val = plat->trm_icp << DLL_TRIM_ICP_SHIFT;
/* Configure DLL driver strength */
mask |= DR_TY_MASK;
val |= plat->drv_strength << DR_TY_SHIFT;
regmap_update_bits(plat->base, PHY_CTRL1, mask, val);
}
/* Enable pins by setting IO mux to 0 */
@ -292,12 +293,13 @@ const struct sdhci_ops am654_sdhci_ops = {
const struct am654_driver_data am654_drv_data = {
.ops = &am654_sdhci_ops,
.flags = IOMUX_PRESENT | FREQSEL_2_BIT | DLL_PRESENT | STRBSEL_4_BIT,
.flags = IOMUX_PRESENT | FREQSEL_2_BIT | DLL_PRESENT | DLL_CALIB |
STRBSEL_4_BIT,
};
const struct am654_driver_data j721e_8bit_drv_data = {
.ops = &am654_sdhci_ops,
.flags = DLL_PRESENT,
.flags = DLL_PRESENT | DLL_CALIB,
};
static int j721e_4bit_sdhci_set_ios_post(struct sdhci_host *host)