summaryrefslogtreecommitdiff
path: root/arch/arm/plat-samsung/watchdog-reset.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/plat-samsung/watchdog-reset.c')
-rw-r--r--arch/arm/plat-samsung/watchdog-reset.c93
1 files changed, 0 insertions, 93 deletions
diff --git a/arch/arm/plat-samsung/watchdog-reset.c b/arch/arm/plat-samsung/watchdog-reset.c
deleted file mode 100644
index 71d85ff323f7..000000000000
--- a/arch/arm/plat-samsung/watchdog-reset.c
+++ /dev/null
@@ -1,93 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-//
-// Copyright (c) 2008 Simtec Electronics
-// Ben Dooks <ben@simtec.co.uk>
-//
-// Copyright (c) 2013 Tomasz Figa <tomasz.figa@gmail.com>
-//
-// Watchdog reset support for Samsung SoCs.
-
-#include <linux/clk.h>
-#include <linux/err.h>
-#include <linux/io.h>
-#include <linux/delay.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-
-#define S3C2410_WTCON 0x00
-#define S3C2410_WTDAT 0x04
-#define S3C2410_WTCNT 0x08
-
-#define S3C2410_WTCON_ENABLE (1 << 5)
-#define S3C2410_WTCON_DIV16 (0 << 3)
-#define S3C2410_WTCON_RSTEN (1 << 0)
-#define S3C2410_WTCON_PRESCALE(x) ((x) << 8)
-
-static void __iomem *wdt_base;
-static struct clk *wdt_clock;
-
-void samsung_wdt_reset(void)
-{
- if (!wdt_base) {
- pr_err("%s: wdt reset not initialized\n", __func__);
- /* delay to allow the serial port to show the message */
- mdelay(50);
- return;
- }
-
- if (!IS_ERR(wdt_clock))
- clk_prepare_enable(wdt_clock);
-
- /* disable watchdog, to be safe */
- __raw_writel(0, wdt_base + S3C2410_WTCON);
-
- /* put initial values into count and data */
- __raw_writel(0x80, wdt_base + S3C2410_WTCNT);
- __raw_writel(0x80, wdt_base + S3C2410_WTDAT);
-
- /* set the watchdog to go and reset... */
- __raw_writel(S3C2410_WTCON_ENABLE | S3C2410_WTCON_DIV16 |
- S3C2410_WTCON_RSTEN | S3C2410_WTCON_PRESCALE(0x20),
- wdt_base + S3C2410_WTCON);
-
- /* wait for reset to assert... */
- mdelay(500);
-
- pr_err("Watchdog reset failed to assert reset\n");
-
- /* delay to allow the serial port to show the message */
- mdelay(50);
-}
-
-#ifdef CONFIG_OF
-static const struct of_device_id s3c2410_wdt_match[] = {
- { .compatible = "samsung,s3c2410-wdt" },
- { .compatible = "samsung,s3c6410-wdt" },
- {},
-};
-
-void __init samsung_wdt_reset_of_init(void)
-{
- struct device_node *np;
-
- np = of_find_matching_node(NULL, s3c2410_wdt_match);
- if (!np) {
- pr_err("%s: failed to find watchdog node\n", __func__);
- return;
- }
-
- wdt_base = of_iomap(np, 0);
- if (!wdt_base) {
- pr_err("%s: failed to map watchdog registers\n", __func__);
- return;
- }
-
- wdt_clock = of_clk_get(np, 0);
-}
-#endif
-
-void __init samsung_wdt_reset_init(void __iomem *base)
-{
- wdt_base = base;
- wdt_clock = clk_get(NULL, "watchdog");
-}