diff options
| author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2017-02-17 10:17:22 +0300 |
|---|---|---|
| committer | Masahiro Yamada <yamada.masahiro@socionext.com> | 2017-02-23 02:37:56 +0300 |
| commit | c21f58548c812032207d986ca7b5baa0bb4a5972 (patch) | |
| tree | 49f43cb06d48b8a4a9f4a23e3d38f649e95d3878 /arch/arm/mach-uniphier/clk/clk-ld11.c | |
| parent | 04f3da393667b094adc4fef37db71c7327d5ed7d (diff) | |
| download | u-boot-c21f58548c812032207d986ca7b5baa0bb4a5972.tar.xz | |
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 <yamada.masahiro@socionext.com>
Diffstat (limited to 'arch/arm/mach-uniphier/clk/clk-ld11.c')
| -rw-r--r-- | arch/arm/mach-uniphier/clk/clk-ld11.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm/mach-uniphier/clk/clk-ld11.c b/arch/arm/mach-uniphier/clk/clk-ld11.c index b1e82a150a..a4dcde743b 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 */ |