From dacdb2402742a0365ca543798a349182872131b4 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <yamada.masahiro@socionext.com>
Date: Mon, 26 Sep 2016 13:13:16 +0900
Subject: [PATCH] ARM: uniphier: do not setup pins for System Bus on NAND boot
mode
For LD11 and LD20 SoCs, the System Bus and NAND are multiplexed
in the same I/O pins. When booting from a NAND device, pin-mux
for the System Bus must not be set-up because they are exclusive
with each other.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
---
arch/arm/mach-uniphier/init/init-ld11.c | 4 +++-
arch/arm/mach-uniphier/init/init-ld20.c | 4 +++-
2 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/arch/arm/mach-uniphier/init/init-ld11.c b/arch/arm/mach-uniphier/init/init-ld11.c
index e324c94700..fdb2838503 100644
--- a/arch/arm/mach-uniphier/init/init-ld11.c
+++ b/arch/arm/mach-uniphier/init/init-ld11.c
@@ -15,7 +15,9 @@ int uniphier_ld11_init(const struct uniphier_board_data *bd)
{
uniphier_sbc_init_savepin(bd);
uniphier_pxs2_sbc_init(bd);
- uniphier_pin_init("system_bus_grp");
+ /* pins for NAND and System Bus are multiplexed */
+ if (spl_boot_device() != BOOT_DEVICE_NAND)
+ uniphier_pin_init("system_bus_grp");
support_card_reset();
diff --git a/arch/arm/mach-uniphier/init/init-ld20.c b/arch/arm/mach-uniphier/init/init-ld20.c
index cb05421252..37b860a8b4 100644
--- a/arch/arm/mach-uniphier/init/init-ld20.c
+++ b/arch/arm/mach-uniphier/init/init-ld20.c
@@ -15,7 +15,9 @@ int uniphier_ld20_init(const struct uniphier_board_data *bd)
{
uniphier_sbc_init_savepin(bd);
uniphier_pxs2_sbc_init(bd);
- uniphier_pin_init("system_bus_grp");
+ /* pins for NAND and System Bus are multiplexed */
+ if (spl_boot_device() != BOOT_DEVICE_NAND)
+ uniphier_pin_init("system_bus_grp");
support_card_reset();
--
2.39.5