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author | huang lin <hl@rock-chips.com> | 2015-11-17 14:20:18 +0800 |
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committer | Simon Glass <sjg@chromium.org> | 2015-12-01 08:07:22 -0700 |
commit | 2bc00e016e4c1440f3004776e26357f46eb6690a (patch) | |
tree | 89ef2b72bf20bc626459789684959d18c7bc27fe /arch/arm/mach-rockchip/rk3036/reset_rk3036.c | |
parent | c17736c02a5704cc48c9d48ce8f0c97e8a66924a (diff) | |
download | u-boot-imx-2bc00e016e4c1440f3004776e26357f46eb6690a.zip u-boot-imx-2bc00e016e4c1440f3004776e26357f46eb6690a.tar.gz u-boot-imx-2bc00e016e4c1440f3004776e26357f46eb6690a.tar.bz2 |
rockchip: rk3036: Add Soc reset driver
We can reset the Soc using some CRU (clock/reset unit) register.
Add support for this.
Signed-off-by: Lin Huang <hl@rock-chips.com>
Acked-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'arch/arm/mach-rockchip/rk3036/reset_rk3036.c')
-rw-r--r-- | arch/arm/mach-rockchip/rk3036/reset_rk3036.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/arch/arm/mach-rockchip/rk3036/reset_rk3036.c b/arch/arm/mach-rockchip/rk3036/reset_rk3036.c new file mode 100644 index 0000000..fefb568 --- /dev/null +++ b/arch/arm/mach-rockchip/rk3036/reset_rk3036.c @@ -0,0 +1,45 @@ +/* + * (C) Copyright 2015 Rockchip Electronics Co., Ltd + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <dm.h> +#include <errno.h> +#include <reset.h> +#include <asm/io.h> +#include <asm/arch/clock.h> +#include <asm/arch/cru_rk3036.h> +#include <asm/arch/hardware.h> +#include <linux/err.h> + +int rk3036_reset_request(struct udevice *dev, enum reset_t type) +{ + struct rk3036_cru *cru = rockchip_get_cru(); + + if (IS_ERR(cru)) + return PTR_ERR(cru); + switch (type) { + case RESET_WARM: + writel(0xeca8, &cru->cru_glb_srst_snd_value); + break; + case RESET_COLD: + writel(0xfdb9, &cru->cru_glb_srst_fst_value); + break; + default: + return -EPROTONOSUPPORT; + } + + return -EINPROGRESS; +} + +static struct reset_ops rk3036_reset = { + .request = rk3036_reset_request, +}; + +U_BOOT_DRIVER(reset_rk3036) = { + .name = "rk3036_reset", + .id = UCLASS_RESET, + .ops = &rk3036_reset, +}; |