[U-Boot] [PATCH 2/7] mmc: fsl_esdhc: fix voltage validation

[Yangbo Lu]

Voltage validation should be done by CMD8. Current comparison between
mmc_cfg voltages and host voltage capabilities is meaningless.
So drop current comparison and let voltage validation is through CMD8.

Signed-off-by: Yangbo Lu <yangbo.lu at nxp.com>
---
 drivers/mmc/fsl_esdhc.c | 36 ++++++++++--------------------------
 include/fsl_esdhc.h     | 13 +++++++------
 2 files changed, 17 insertions(+), 32 deletions(-)

diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c
index 7d7236c..40fd6af 100644
--- a/drivers/mmc/fsl_esdhc.c
+++ b/drivers/mmc/fsl_esdhc.c
@@ -684,7 +684,7 @@ static int fsl_esdhc_init(struct fsl_esdhc_priv *priv,
 {
 	struct mmc_config *cfg;
 	struct fsl_esdhc *regs;
-	u32 caps, voltage_caps;
+	u32 caps;
 
 	if (!priv)
 		return -EINVAL;
@@ -696,40 +696,24 @@ static int fsl_esdhc_init(struct fsl_esdhc_priv *priv,
 	memset(cfg, '\0', sizeof(*cfg));
 #endif
 
-	voltage_caps = 0;
 	caps = esdhc_read32(&regs->hostcapblt);
-
 #ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC135
-	caps = caps & ~(ESDHC_HOSTCAPBLT_SRS |
-			ESDHC_HOSTCAPBLT_VS18 | ESDHC_HOSTCAPBLT_VS30);
+	caps &= ~(HOSTCAPBLT_SRS | HOSTCAPBLT_VS18 | HOSTCAPBLT_VS30);
 #endif
-
-/* T4240 host controller capabilities register should have VS33 bit */
 #ifdef CONFIG_SYS_FSL_MMC_HAS_CAPBLT_VS33
-	caps = caps | ESDHC_HOSTCAPBLT_VS33;
+	caps |= HOSTCAPBLT_VS33;
 #endif
-
-	if (caps & ESDHC_HOSTCAPBLT_VS18)
-		voltage_caps |= MMC_VDD_165_195;
-	if (caps & ESDHC_HOSTCAPBLT_VS30)
-		voltage_caps |= MMC_VDD_29_30 | MMC_VDD_30_31;
-	if (caps & ESDHC_HOSTCAPBLT_VS33)
-		voltage_caps |= MMC_VDD_32_33 | MMC_VDD_33_34;
+	if (caps & HOSTCAPBLT_VS18)
+		cfg->voltages |= MMC_VDD_165_195;
+	if (caps & HOSTCAPBLT_VS30)
+		cfg->voltages |= MMC_VDD_29_30 | MMC_VDD_30_31;
+	if (caps & HOSTCAPBLT_VS33)
+		cfg->voltages |= MMC_VDD_32_33 | MMC_VDD_33_34;
 
 	cfg->name = "FSL_SDHC";
 #if !CONFIG_IS_ENABLED(DM_MMC)
 	cfg->ops = &esdhc_ops;
 #endif
-#ifdef CONFIG_SYS_SD_VOLTAGE
-	cfg->voltages = CONFIG_SYS_SD_VOLTAGE;
-#else
-	cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
-#endif
-	if ((cfg->voltages & voltage_caps) == 0) {
-		printf("voltage not supported by controller\n");
-		return -1;
-	}
-
 	if (priv->bus_width == 8)
 		cfg->host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT;
 	else if (priv->bus_width == 4)
@@ -744,7 +728,7 @@ static int fsl_esdhc_init(struct fsl_esdhc_priv *priv,
 			cfg->host_caps &= ~MMC_MODE_4BIT;
 	}
 
-	if (caps & ESDHC_HOSTCAPBLT_HSS)
+	if (caps & HOSTCAPBLT_HSS)
 		cfg->host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
 
 #ifdef CONFIG_ESDHC_DETECT_8_BIT_QUIRK
diff --git a/include/fsl_esdhc.h b/include/fsl_esdhc.h
index 33dcbee..a015df1 100644
--- a/include/fsl_esdhc.h
+++ b/include/fsl_esdhc.h
@@ -156,12 +156,13 @@
 #define BLKATTR_SIZE(x)	(x & 0x1fff)
 #define MAX_BLK_CNT	0x7fff	/* so malloc will have enough room with 32M */
 
-#define ESDHC_HOSTCAPBLT_VS18	0x04000000
-#define ESDHC_HOSTCAPBLT_VS30	0x02000000
-#define ESDHC_HOSTCAPBLT_VS33	0x01000000
-#define ESDHC_HOSTCAPBLT_SRS	0x00800000
-#define ESDHC_HOSTCAPBLT_DMAS	0x00400000
-#define ESDHC_HOSTCAPBLT_HSS	0x00200000
+/* Host controller capabilities register */
+#define HOSTCAPBLT_VS18		0x04000000
+#define HOSTCAPBLT_VS30		0x02000000
+#define HOSTCAPBLT_VS33		0x01000000
+#define HOSTCAPBLT_SRS		0x00800000
+#define HOSTCAPBLT_DMAS		0x00400000
+#define HOSTCAPBLT_HSS		0x00200000
 
 struct fsl_esdhc_cfg {
 	phys_addr_t esdhc_base;
-- 
2.7.4