[v3, 1/3] mmc: fsl_esdhc: convert to CONFIG_FSL_ESDHC_VS33_NOT_SUPPORT

[Yangbo Lu]

For eSDHC, power supply is through peripheral circuit.
Some eSDHC versions have value 0 of the bit but that
does not reflect the truth. 3.3V is common for SD/MMC,
and is supported for all boards with eSDHC in current
u-boot. So, make 3.3V is supported in default in code.
CONFIG_FSL_ESDHC_VS33_NOT_SUPPORT can be enabled if
future board does not support 3.3V.

This is also a fix-up for one previous patch, which converted
to use IS_ENABLED() for CONFIG_SYS_FSL_MMC_HAS_CAPBLT_VS33
that is not a Kconfig option.

Fixes: 52faec31827e ("mmc: fsl_esdhc: replace most #ifdefs by IS_ENABLED()")
Signed-off-by: Yangbo Lu <yangbo.lu at nxp.com>
---
Changes for v2:
	- Updated copyright.
Chagnes for v3:
	- Fixed code logic.
---
 drivers/mmc/Kconfig     |  7 +++++++
 drivers/mmc/fsl_esdhc.c | 17 ++++++++++++++---
 2 files changed, 21 insertions(+), 3 deletions(-)

diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig
index 8901456967..0909f502a1 100644
--- a/drivers/mmc/Kconfig
+++ b/drivers/mmc/Kconfig
@@ -798,6 +798,13 @@ config FSL_ESDHC_33V_IO_RELIABILITY_WORKAROUND
 	  This option assumes no hotplug, and u-boot has to make all the way to
 	  to linux to use 1.8v UHS-I speed mode if has card.
 
+config FSL_ESDHC_VS33_NOT_SUPPORT
+	bool "3.3V power supply not supported"
+	depends on FSL_ESDHC
+	help
+	  For eSDHC, power supply is through peripheral circuit. 3.3V support is
+	  common. Select this if 3.3V power supply not supported.
+
 config FSL_ESDHC_IMX
 	bool "Freescale/NXP i.MX eSDHC controller support"
 	help
diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c
index 7501fdb71e..1d98fa65c4 100644
--- a/drivers/mmc/fsl_esdhc.c
+++ b/drivers/mmc/fsl_esdhc.c
@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright 2007, 2010-2011 Freescale Semiconductor, Inc
- * Copyright 2019-2020 NXP
+ * Copyright 2019-2021 NXP
  * Andy Fleming
  *
  * Based vaguely on the pxa mmc code:
@@ -795,10 +795,21 @@ static void fsl_esdhc_get_cfg_common(struct fsl_esdhc_priv *priv,
 	u32 caps;
 
 	caps = esdhc_read32(&regs->hostcapblt);
+
+	/*
+	 * For eSDHC, power supply is through peripheral circuit. Some eSDHC
+	 * versions have value 0 of the bit but that does not reflect the
+	 * truth. 3.3V is common for SD/MMC, and is supported for all boards
+	 * with eSDHC in current u-boot. So, make 3.3V is supported in
+	 * default in code. CONFIG_FSL_ESDHC_VS33_NOT_SUPPORT can be enabled
+	 * if future board does not support 3.3V.
+	 */
+	caps |= HOSTCAPBLT_VS33;
+	if (IS_ENABLED(CONFIG_FSL_ESDHC_VS33_NOT_SUPPORT))
+		caps &= ~HOSTCAPBLT_VS33;
+
 	if (IS_ENABLED(CONFIG_SYS_FSL_ERRATUM_ESDHC135))
 		caps &= ~(HOSTCAPBLT_SRS | HOSTCAPBLT_VS18 | HOSTCAPBLT_VS30);
-	if (IS_ENABLED(CONFIG_SYS_FSL_MMC_HAS_CAPBLT_VS33))
-		caps |= HOSTCAPBLT_VS33;
 	if (caps & HOSTCAPBLT_VS18)
 		cfg->voltages |= MMC_VDD_165_195;
 	if (caps & HOSTCAPBLT_VS30)
-- 
2.25.1