[PATCH v1 2/2] [WIP] arm: mvebu: Enable helios4 opt-out of SPL GPIO

[Joel Johnson]

Change the SPL boot selection of MMC from a hard selection of GPIO to
a softer imply and opt-out of GPIO support for helios4. This preserves
the previous GPIO-less configuration.

Signed-off-by: Joel Johnson <mrjoel at lixil.net>

---


Aditya Prayoga - if you object to the addition of GPIO to the helios4
                 SPL, I'd be interested in your thoughts on this option

This is an exploratory commit of a viable approach to retain the
identical current helios4 current configuration. I think it's not worth
it and shouldn't be applied since helios4 uses default MMC boot and
there is sufficient space for the SPL image, but is a viable option
depending on the opinion of helios4 interested maintainers.

---
 arch/arm/mach-mvebu/Kconfig | 6 +++---
 configs/helios4_defconfig   | 1 +
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/arch/arm/mach-mvebu/Kconfig b/arch/arm/mach-mvebu/Kconfig
index 645990b3ef..af30d71cc6 100644
--- a/arch/arm/mach-mvebu/Kconfig
+++ b/arch/arm/mach-mvebu/Kconfig
@@ -245,12 +245,12 @@ config MVEBU_SPL_BOOT_DEVICE_SPI
 config MVEBU_SPL_BOOT_DEVICE_MMC
 	bool "SDIO/MMC card"
 	imply ENV_IS_IN_MMC
-	# GPIO needed for eMMC/SD card presence detection
-	select SPL_DM_GPIO
 	select SPL_DM_MMC
-	select SPL_GPIO_SUPPORT
 	select SPL_LIBDISK_SUPPORT
 	select SPL_MMC_SUPPORT
+	# GPIO often needed for eMMC/SD card presence detection
+	imply SPL_DM_GPIO
+	imply SPL_GPIO_SUPPORT
 
 config MVEBU_SPL_BOOT_DEVICE_SATA
 	bool "SATA"
diff --git a/configs/helios4_defconfig b/configs/helios4_defconfig
index 0fe8559507..3630a004bd 100644
--- a/configs/helios4_defconfig
+++ b/configs/helios4_defconfig
@@ -2,6 +2,7 @@ CONFIG_ARM=y
 CONFIG_ARCH_CPU_INIT=y
 CONFIG_ARCH_MVEBU=y
 CONFIG_SYS_TEXT_BASE=0x00800000
+# CONFIG_SPL_GPIO_SUPPORT is not set
 CONFIG_SPL_LIBCOMMON_SUPPORT=y
 CONFIG_SPL_LIBGENERIC_SUPPORT=y
 CONFIG_SYS_MALLOC_F_LEN=0x2000
-- 
2.26.1