[PATCH 3/4] watchdog: sa11x0/pxa: get rid of get_clock_tick_rate
From: robert.jarzmik@free.fr (Robert Jarzmik)
Date: 2016-09-19 19:20:04
Also in:
linux-clk, linux-watchdog, lkml
Subsystem:
the rest, watchdog device drivers · Maintainers:
Linus Torvalds, Wim Van Sebroeck, Guenter Roeck
The OS timer rate used for the watchdog can now be fetched from the standard clock API. This will remove the last user of get_clock_tick_rate() in both pxa and sa11x0 architectures. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> --- drivers/watchdog/sa1100_wdt.c | 24 +++++++++++++++++++++++- 1 file changed, 23 insertions(+), 1 deletion(-)
diff --git a/drivers/watchdog/sa1100_wdt.c b/drivers/watchdog/sa1100_wdt.c
index e1d39a1e9628..8965e3f536c3 100644
--- a/drivers/watchdog/sa1100_wdt.c
+++ b/drivers/watchdog/sa1100_wdt.c@@ -22,6 +22,7 @@ #include <linux/module.h> #include <linux/moduleparam.h> +#include <linux/clk.h> #include <linux/types.h> #include <linux/kernel.h> #include <linux/fs.h>
@@ -155,12 +156,27 @@ static struct miscdevice sa1100dog_miscdev = { }; static int margin __initdata = 60; /* (secs) Default is 1 minute */ +static struct clk *clk; static int __init sa1100dog_init(void) { int ret; - oscr_freq = get_clock_tick_rate(); + clk = clk_get(NULL, "OSTIMER0"); + if (IS_ERR(clk)) { + pr_err("SA1100/PXA2xx Watchdog Timer: clock not found: %d\n", + (int) PTR_ERR(clk)); + return PTR_ERR(clk); + } + + ret = clk_prepare_enable(clk); + if (ret) { + pr_err("SA1100/PXA2xx Watchdog Timer: clock failed to prepare+enable: %d\n", + ret); + goto err; + } + + oscr_freq = clk_get_rate(clk); /* * Read the reset status, and save it for later. If
@@ -176,11 +192,17 @@ static int __init sa1100dog_init(void) pr_info("SA1100/PXA2xx Watchdog Timer: timer margin %d sec\n", margin); return ret; +err: + clk_disable_unprepare(clk); + clk_put(clk); + return ret; } static void __exit sa1100dog_exit(void) { misc_deregister(&sa1100dog_miscdev); + clk_disable_unprepare(clk); + clk_put(clk); } module_init(sa1100dog_init);
--
2.1.4