From c21f58548c812032207d986ca7b5baa0bb4a5972 Mon Sep 17 00:00:00 2001 From: Masahiro Yamada Date: Fri, 17 Feb 2017 16:17:22 +0900 Subject: ARM: uniphier: deassert RST_n of eMMC device for LD11/LD20 For LD11 and LD20 SoCs, the RST_n pin is asserted by default. If the EXT_CSD[162], bit[1:0] (RST_n_ENABLE) is fused, the eMMC device would stay in the reset state until its RST_n pin is deasserted by software. Currently, this is cared by an ad-hoc way because the eMMC hardware reset provider is not supported in U-Boot for now. This code should be re-written once the "mmc-pwrseq-emmc" binding is supported. Signed-off-by: Masahiro Yamada --- arch/arm/mach-uniphier/clk/clk-ld11.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'arch/arm/mach-uniphier/clk/clk-ld11.c') diff --git a/arch/arm/mach-uniphier/clk/clk-ld11.c b/arch/arm/mach-uniphier/clk/clk-ld11.c index b1e82a1..a4dcde7 100644 --- a/arch/arm/mach-uniphier/clk/clk-ld11.c +++ b/arch/arm/mach-uniphier/clk/clk-ld11.c @@ -13,6 +13,8 @@ #include "../sc64-regs.h" #include "../sg-regs.h" +#define SDCTRL_EMMC_HW_RESET 0x59810280 + void uniphier_ld11_clk_init(void) { /* if booted from a device other than USB, without stand-by MPU */ @@ -28,6 +30,9 @@ void uniphier_ld11_clk_init(void) writel(7, SG_ETPHYCNT); } + /* TODO: use "mmc-pwrseq-emmc" */ + writel(1, SDCTRL_EMMC_HW_RESET); + #ifdef CONFIG_USB_EHCI { /* FIXME: the current clk driver can not handle parents */ -- cgit v1.1