rockchip: rk322x: add sysreset driver

Rockchip rk322x sysreset is much like rk3036 and other Rockchip SoCs,
only difference is that the target register address is different.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>

diff --git a/drivers/sysreset/sysreset_rk322x.c b/drivers/sysreset/sysreset_rk322x.c
new file mode 100644 (file)
index 0000000..5fce79b
--- /dev/null
+++ b/drivers/sysreset/sysreset_rk322x.c
@@ -0,0 +1,45 @@
+/*
+ * (C) Copyright 2017 Rockchip Electronics Co., Ltd
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <sysreset.h>
+#include <asm/io.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/cru_rk322x.h>
+#include <asm/arch/hardware.h>
+#include <linux/err.h>
+
+int rk322x_sysreset_request(struct udevice *dev, enum sysreset_t type)
+{
+       struct rk322x_cru *cru = rockchip_get_cru();
+
+       if (IS_ERR(cru))
+               return PTR_ERR(cru);
+       switch (type) {
+       case SYSRESET_WARM:
+               writel(0xeca8, &cru->cru_glb_srst_snd_value);
+               break;
+       case SYSRESET_COLD:
+               writel(0xfdb9, &cru->cru_glb_srst_fst_value);
+               break;
+       default:
+               return -EPROTONOSUPPORT;
+       }
+
+       return -EINPROGRESS;
+}
+
+static struct sysreset_ops rk322x_sysreset = {
+       .request        = rk322x_sysreset_request,
+};
+
+U_BOOT_DRIVER(sysreset_rk322x) = {
+       .name   = "rk322x_sysreset",
+       .id     = UCLASS_SYSRESET,
+       .ops    = &rk322x_sysreset,
+};