mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-20 14:13:16 +00:00
91 lines
2.1 KiB
Diff
91 lines
2.1 KiB
Diff
From 223f1c46e109a8420765aee099a5d1dc4ab7ee98 Mon Sep 17 00:00:00 2001
|
|
From: John Crispin <blogic@openwrt.org>
|
|
Date: Tue, 3 Sep 2013 13:18:12 +0200
|
|
Subject: [PATCH 05/36] MIPS: lantiq: add reset-controller api support
|
|
|
|
Add a reset-controller binding for the reset registers found on the lantiq
|
|
SoC.
|
|
|
|
Signed-off-by: John Crispin <blogic@openwrt.org>
|
|
---
|
|
arch/mips/lantiq/xway/reset.c | 61 +++++++++++++++++++++++++++++++++++++++++
|
|
1 file changed, 61 insertions(+)
|
|
|
|
--- a/arch/mips/lantiq/xway/reset.c
|
|
+++ b/arch/mips/lantiq/xway/reset.c
|
|
@@ -14,6 +14,7 @@
|
|
#include <linux/delay.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/of_platform.h>
|
|
+#include <linux/reset-controller.h>
|
|
|
|
#include <asm/reboot.h>
|
|
|
|
@@ -113,6 +114,66 @@ void ltq_reset_once(unsigned int module,
|
|
ltq_rcu_w32(ltq_rcu_r32(RCU_RST_REQ) & ~module, RCU_RST_REQ);
|
|
}
|
|
|
|
+static int ltq_assert_device(struct reset_controller_dev *rcdev,
|
|
+ unsigned long id)
|
|
+{
|
|
+ u32 val;
|
|
+
|
|
+ if (id < 8)
|
|
+ return -1;
|
|
+
|
|
+ val = ltq_rcu_r32(RCU_RST_REQ);
|
|
+ val |= BIT(id);
|
|
+ ltq_rcu_w32(val, RCU_RST_REQ);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int ltq_deassert_device(struct reset_controller_dev *rcdev,
|
|
+ unsigned long id)
|
|
+{
|
|
+ u32 val;
|
|
+
|
|
+ if (id < 8)
|
|
+ return -1;
|
|
+
|
|
+ val = ltq_rcu_r32(RCU_RST_REQ);
|
|
+ val &= ~BIT(id);
|
|
+ ltq_rcu_w32(val, RCU_RST_REQ);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int ltq_reset_device(struct reset_controller_dev *rcdev,
|
|
+ unsigned long id)
|
|
+{
|
|
+ ltq_assert_device(rcdev, id);
|
|
+ return ltq_deassert_device(rcdev, id);
|
|
+}
|
|
+
|
|
+static struct reset_control_ops reset_ops = {
|
|
+ .reset = ltq_reset_device,
|
|
+ .assert = ltq_assert_device,
|
|
+ .deassert = ltq_deassert_device,
|
|
+};
|
|
+
|
|
+static struct reset_controller_dev reset_dev = {
|
|
+ .ops = &reset_ops,
|
|
+ .owner = THIS_MODULE,
|
|
+ .nr_resets = 32,
|
|
+ .of_reset_n_cells = 1,
|
|
+};
|
|
+
|
|
+void ltq_rst_init(void)
|
|
+{
|
|
+ reset_dev.of_node = of_find_compatible_node(NULL, NULL,
|
|
+ "lantiq,xway-reset");
|
|
+ if (!reset_dev.of_node)
|
|
+ pr_err("Failed to find reset controller node");
|
|
+ else
|
|
+ reset_controller_register(&reset_dev);
|
|
+}
|
|
+
|
|
static void ltq_machine_restart(char *command)
|
|
{
|
|
local_irq_disable();
|