Commit 23514731 authored by Faiz Abbas's avatar Faiz Abbas Committed by Ulf Hansson
Browse files

mmc: sdhci_am654: Add flag for PHY calibration 



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

Signed-off-by: default avatarFaiz Abbas <faiz_abbas@ti.com>
Link: https://lore.kernel.org/r/20200619125801.9530-3-faiz_abbas@ti.com


Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent b1f85c8f

drivers/mmc/host/sdhci_am654.c

+5 −3
Original line number Diff line number Diff line
@@ -97,6 +97,7 @@ struct sdhci_am654_driver_data { 
#define FREQSEL_2_BIT	(1 << 1)

#define STRBSEL_4_BIT	(1 << 2)

#define DLL_PRESENT	(1 << 3)

#define DLL_CALIB	(1 << 4)

};



struct timing_data {
@@ -325,7 +326,8 @@ static const struct sdhci_pltfm_data sdhci_am654_pdata = { 


static const struct sdhci_am654_driver_data sdhci_am654_drvdata = {

	.pdata = &sdhci_am654_pdata,

	.flags = IOMUX_PRESENT | FREQSEL_2_BIT | STRBSEL_4_BIT | DLL_PRESENT,

	.flags = IOMUX_PRESENT | FREQSEL_2_BIT | STRBSEL_4_BIT | DLL_PRESENT |

		 DLL_CALIB,

};



static struct sdhci_ops sdhci_j721e_8bit_ops = {
@@ -348,7 +350,7 @@ static const struct sdhci_pltfm_data sdhci_j721e_8bit_pdata = { 


static const struct sdhci_am654_driver_data sdhci_j721e_8bit_drvdata = {

	.pdata = &sdhci_j721e_8bit_pdata,

	.flags = DLL_PRESENT,

	.flags = DLL_PRESENT | DLL_CALIB,

};



static struct sdhci_ops sdhci_j721e_4bit_ops = {
@@ -469,7 +471,7 @@ static int sdhci_am654_init(struct sdhci_host *host) 
	mask = OTAPDLYENA_MASK | OTAPDLYSEL_MASK;

	regmap_update_bits(sdhci_am654->base, PHY_CTRL4, mask, 0x0);



	if (sdhci_am654->flags & DLL_PRESENT) {

	if (sdhci_am654->flags & DLL_CALIB) {

		regmap_read(sdhci_am654->base, PHY_STAT1, &val);

		if (~val & CALDONE_MASK) {

			/* Calibrate IO lines */

CRA Git | Maintained and supported by SUSTech CRA and CCSE