Commit-ID: 41505a208f5d48671fcc9efe67a71cc8e28df653
Gitweb: http://git.kernel.org/tip/41505a208f5d48671fcc9efe67a71cc8e28df653
Author: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
AuthorDate: Mon, 6 Jun 2016 18:00:51 +0200
Committer: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
CommitDate: Tue, 28 Jun 2016 10:19:28 +0200
clocksource/drivers/pistachio: Convert init function to return error
The init functions do not return any error. They behave as the following:
- panic, thus leading to a kernel crash while another timer may work and
make the system boot up correctly
or
- print an error and let the caller unaware if the state of the system
Change that by converting the init functions to return an error conforming
to the CLOCKSOURCE_OF_RET prototype.
Proper error handling (rollback, errno value) will be changed later case
by case, thus this change just return back an error or success in the init
function.
Signed-off-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
---
drivers/clocksource/time-pistachio.c | 20 ++++++++++----------
1 file changed, 10 insertions(+), 10 deletions(-)
diff --git a/drivers/clocksource/time-pistachio.c b/drivers/clocksource/time-pistachio.c
index 376e59b..adaaec5 100644
--- a/drivers/clocksource/time-pistachio.c
+++ b/drivers/clocksource/time-pistachio.c
@@ -148,7 +148,7 @@ static struct pistachio_clocksource pcs_gpt = {
},
};
-static void __init pistachio_clksrc_of_init(struct device_node *node)
+static int __init pistachio_clksrc_of_init(struct device_node *node)
{
struct clk *sys_clk, *fast_clk;
struct regmap *periph_regs;
@@ -158,45 +158,45 @@ static void __init pistachio_clksrc_of_init(struct device_node *node)
pcs_gpt.base = of_iomap(node, 0);
if (!pcs_gpt.base) {
pr_err("cannot iomap\n");
- return;
+ return -ENXIO;
}
periph_regs = syscon_regmap_lookup_by_phandle(node, "img,cr-periph");
if (IS_ERR(periph_regs)) {
pr_err("cannot get peripheral regmap (%ld)\n",
PTR_ERR(periph_regs));
- return;
+ return PTR_ERR(periph_regs);
}
/* Switch to using the fast counter clock */
ret = regmap_update_bits(periph_regs, PERIP_TIMER_CONTROL,
0xf, 0x0);
if (ret)
- return;
+ return ret;
sys_clk = of_clk_get_by_name(node, "sys");
if (IS_ERR(sys_clk)) {
pr_err("clock get failed (%ld)\n", PTR_ERR(sys_clk));
- return;
+ return PTR_ERR(sys_clk);
}
fast_clk = of_clk_get_by_name(node, "fast");
if (IS_ERR(fast_clk)) {
pr_err("clock get failed (%lu)\n", PTR_ERR(fast_clk));
- return;
+ return PTR_ERR(fast_clk);
}
ret = clk_prepare_enable(sys_clk);
if (ret < 0) {
pr_err("failed to enable clock (%d)\n", ret);
- return;
+ return ret;
}
ret = clk_prepare_enable(fast_clk);
if (ret < 0) {
pr_err("failed to enable clock (%d)\n", ret);
clk_disable_unprepare(sys_clk);
- return;
+ return ret;
}
rate = clk_get_rate(fast_clk);
@@ -212,7 +212,7 @@ static void __init pistachio_clksrc_of_init(struct device_node *node)
raw_spin_lock_init(&pcs_gpt.lock);
sched_clock_register(pistachio_read_sched_clock, 32, rate);
- clocksource_register_hz(&pcs_gpt.cs, rate);
+ return clocksource_register_hz(&pcs_gpt.cs, rate);
}
-CLOCKSOURCE_OF_DECLARE(pistachio_gptimer, "img,pistachio-gptimer",
+CLOCKSOURCE_OF_DECLARE_RET(pistachio_gptimer, "img,pistachio-gptimer",
pistachio_clksrc_of_init);
--
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