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Diffstat (limited to 'arch/mips/ralink/reset.c')
-rw-r--r--arch/mips/ralink/reset.c62
1 files changed, 62 insertions, 0 deletions
diff --git a/arch/mips/ralink/reset.c b/arch/mips/ralink/reset.c
index 22120e512e7e..55c7ec59df3c 100644
--- a/arch/mips/ralink/reset.c
+++ b/arch/mips/ralink/reset.c
@@ -10,6 +10,8 @@
#include <linux/pm.h>
#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/reset-controller.h>
#include <asm/reboot.h>
@@ -19,6 +21,66 @@
#define SYSC_REG_RESET_CTRL 0x034
#define RSTCTL_RESET_SYSTEM BIT(0)
+static int ralink_assert_device(struct reset_controller_dev *rcdev,
+ unsigned long id)
+{
+ u32 val;
+
+ if (id < 8)
+ return -1;
+
+ val = rt_sysc_r32(SYSC_REG_RESET_CTRL);
+ val |= BIT(id);
+ rt_sysc_w32(val, SYSC_REG_RESET_CTRL);
+
+ return 0;
+}
+
+static int ralink_deassert_device(struct reset_controller_dev *rcdev,
+ unsigned long id)
+{
+ u32 val;
+
+ if (id < 8)
+ return -1;
+
+ val = rt_sysc_r32(SYSC_REG_RESET_CTRL);
+ val &= ~BIT(id);
+ rt_sysc_w32(val, SYSC_REG_RESET_CTRL);
+
+ return 0;
+}
+
+static int ralink_reset_device(struct reset_controller_dev *rcdev,
+ unsigned long id)
+{
+ ralink_assert_device(rcdev, id);
+ return ralink_deassert_device(rcdev, id);
+}
+
+static struct reset_control_ops reset_ops = {
+ .reset = ralink_reset_device,
+ .assert = ralink_assert_device,
+ .deassert = ralink_deassert_device,
+};
+
+static struct reset_controller_dev reset_dev = {
+ .ops = &reset_ops,
+ .owner = THIS_MODULE,
+ .nr_resets = 32,
+ .of_reset_n_cells = 1,
+};
+
+void ralink_rst_init(void)
+{
+ reset_dev.of_node = of_find_compatible_node(NULL, NULL,
+ "ralink,rt2880-reset");
+ if (!reset_dev.of_node)
+ pr_err("Failed to find reset controller node");
+ else
+ reset_controller_register(&reset_dev);
+}
+
static void ralink_restart(char *command)
{
local_irq_disable();