Re: [U-Boot] [PATCH v2 4/7] rockchip: rk3368: Add sysreset driver

[sjg]

Add sysreset driver to reset rk3368 SOC.

Signed-off-by: Andy Yan 
Reviewed-by: Simon Glass 
---

Changes in v2:
 - slect soft reset source before reset

 drivers/sysreset/Makefile  |  1 +
 drivers/sysreset/sysreset_rk3368.c | 62 ++
 2 files changed, 63 insertions(+)
 create mode 100644 drivers/sysreset/sysreset_rk3368.c

Applied to u-boot-rockchip, thanks!
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[U-Boot] [PATCH v2 4/7] rockchip: rk3368: Add sysreset driver

[Andy Yan]

Add sysreset driver to reset rk3368 SOC.

Signed-off-by: Andy Yan 
Reviewed-by: Simon Glass 
---

Changes in v2:
 - slect soft reset source before reset

 drivers/sysreset/Makefile  |  1 +
 drivers/sysreset/sysreset_rk3368.c | 62 ++
 2 files changed, 63 insertions(+)
 create mode 100644 drivers/sysreset/sysreset_rk3368.c

diff --git a/drivers/sysreset/Makefile b/drivers/sysreset/Makefile
index 7bb8406..42aaeaf 100644
--- a/drivers/sysreset/Makefile
+++ b/drivers/sysreset/Makefile
@@ -13,6 +13,7 @@ endif
 obj-$(CONFIG_ROCKCHIP_RK3188) += sysreset_rk3188.o
 obj-$(CONFIG_ROCKCHIP_RK3288) += sysreset_rk3288.o
 obj-$(CONFIG_ROCKCHIP_RK3328) += sysreset_rk3328.o
+obj-$(CONFIG_ROCKCHIP_RK3368) += sysreset_rk3368.o
 obj-$(CONFIG_ROCKCHIP_RK3399) += sysreset_rk3399.o
 obj-$(CONFIG_SANDBOX) += sysreset_sandbox.o
 obj-$(CONFIG_ARCH_SNAPDRAGON) += sysreset_snapdragon.o
diff --git a/drivers/sysreset/sysreset_rk3368.c 
b/drivers/sysreset/sysreset_rk3368.c
new file mode 100644
index 000..de62921
--- /dev/null
+++ b/drivers/sysreset/sysreset_rk3368.c
@@ -0,0 +1,62 @@
+/*
+ * (C) Copyright Rockchip Electronics Co., Ltd
+ *
+ * SPDX-License-Identifier:GPL-2.0
+ */
+
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+
+static void rk3368_pll_enter_slow_mode(struct rk3368_cru *cru)
+{
+   struct rk3368_pll *pll;
+   int i;
+
+   for (i = 0; i < 6; i++) {
+   pll = >pll[i];
+   rk_clrreg(>con3, PLL_MODE_MASK);
+   }
+}
+
+static int rk3368_sysreset_request(struct udevice *dev, enum sysreset_t type)
+{
+   struct rk3368_cru *cru = rockchip_get_cru();
+
+   if (IS_ERR(cru))
+   return PTR_ERR(cru);
+   switch (type) {
+   case SYSRESET_WARM:
+   rk3368_pll_enter_slow_mode(cru);
+   rk_clrsetreg(>glb_rst_con, PMU_GLB_SRST_CTRL_MASK,
+PMU_RST_BY_SND_GLB_SRST << 
PMU_GLB_SRST_CTRL_SHIFT);
+   writel(0xeca8, >glb_srst_snd_val);
+   break;
+   case SYSRESET_COLD:
+   rk3368_pll_enter_slow_mode(cru);
+   rk_clrsetreg(>glb_rst_con, PMU_GLB_SRST_CTRL_MASK,
+PMU_RST_BY_FST_GLB_SRST << 
PMU_GLB_SRST_CTRL_SHIFT);
+   writel(0xfdb9, >glb_srst_fst_val);
+   break;
+   default:
+   return -EPROTONOSUPPORT;
+   }
+
+   return -EINPROGRESS;
+}
+
+static struct sysreset_ops rk3368_sysreset = {
+   .request= rk3368_sysreset_request,
+};
+
+U_BOOT_DRIVER(sysreset_rk3368) = {
+   .name   = "rk3368_sysreset",
+   .id = UCLASS_SYSRESET,
+   .ops= _sysreset,
+};
-- 
2.7.4


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