Correct typo and use proper upper casing for acronyms in the comments,
use common style for error messages, prepend error messages with
"tegra-timer:", add error message for cpuhp_setup_state() failure and
clean up whitespaces in the code to fix checkpatch warnings.
Signed-off-by: Dmitry Osipenko <digetx@xxxxxxxxx>
---
drivers/clocksource/timer-tegra20.c | 42 ++++++++++++++++-------------
1 file changed, 23 insertions(+), 19 deletions(-)
diff --git a/drivers/clocksource/timer-tegra20.c b/drivers/clocksource/timer-tegra20.c
index df3139ed7157..e87fa5719d4b 100644
--- a/drivers/clocksource/timer-tegra20.c
+++ b/drivers/clocksource/timer-tegra20.c
@@ -15,6 +15,8 @@
*
*/
+#define pr_fmt(fmt) "tegra-timer: " fmt
+
#include <linux/clk.h>
#include <linux/clockchips.h>
#include <linux/cpu.h>
@@ -30,13 +32,13 @@
#include "timer-of.h"
-#define RTC_SECONDS 0x08
-#define RTC_SHADOW_SECONDS 0x0c
-#define RTC_MILLISECONDS 0x10
+#define RTC_SECONDS 0x08
+#define RTC_SHADOW_SECONDS 0x0c
+#define RTC_MILLISECONDS 0x10
-#define TIMERUS_CNTR_1US 0x10
-#define TIMERUS_USEC_CFG 0x14
-#define TIMERUS_CNTR_FREEZE 0x4c
+#define TIMERUS_CNTR_1US 0x10
+#define TIMERUS_USEC_CFG 0x14
+#define TIMERUS_CNTR_FREEZE 0x4c
#define TIMER_PTV 0x0
#define TIMER_PTV_EN BIT(31)
@@ -60,7 +62,7 @@ static struct timespec64 persistent_ts;
static u64 persistent_ms, last_persistent_ms;
static int tegra_timer_set_next_event(unsigned long cycles,
- struct clock_event_device *evt)
+ struct clock_event_device *evt)
{
void __iomem *reg_base = timer_of_base(to_timer_of(evt));
@@ -185,7 +187,7 @@ static struct delay_timer tegra_delay_timer = {
/*
* tegra_rtc_read - Reads the Tegra RTC registers
- * Care must be taken that this funciton is not called while the
+ * Care must be taken that this function is not called while the
* tegra_rtc driver could be executing to avoid race conditions
* on the RTC shadow register
*/
@@ -193,6 +195,7 @@ static u64 tegra_rtc_read_ms(void)
{
u32 ms = readl_relaxed(rtc_base + RTC_MILLISECONDS);
u32 s = readl_relaxed(rtc_base + RTC_SHADOW_SECONDS);
+
return (u64)s * MSEC_PER_SEC + ms;
}
@@ -202,7 +205,7 @@ static u64 tegra_rtc_read_ms(void)
* Reads the time from a source which isn't disabled during PM, the
* 32k sync timer. Convert the cycles elapsed since last read into
* nsecs and adds to a monotonically increasing timespec64.
- * Care must be taken that this funciton is not called while the
+ * Care must be taken that this function is not called while the
* tegra_rtc driver could be executing to avoid race conditions
* on the RTC shadow register
*/
@@ -313,8 +316,7 @@ static int __init tegra_init_timer(struct device_node *np, bool tegra20)
cpu_to->clkevt.cpumask = cpumask_of(cpu);
cpu_to->clkevt.irq = irq_of_parse_and_map(np, idx);
if (!cpu_to->clkevt.irq) {
- pr_err("%s: can't map IRQ for CPU%d\n",
- __func__, cpu);
+ pr_err("failed to map irq for cpu%d\n", cpu);
ret = -EINVAL;
goto out_irq;
}
@@ -324,8 +326,8 @@ static int __init tegra_init_timer(struct device_node *np, bool tegra20)
IRQF_TIMER | IRQF_NOBALANCING,
cpu_to->clkevt.name, &cpu_to->clkevt);
if (ret) {
- pr_err("%s: cannot setup irq %d for CPU%d\n",
- __func__, cpu_to->clkevt.irq, cpu);
+ pr_err("failed to set up irq for cpu%d: %d\n",
+ cpu, ret);
irq_dispose_mapping(cpu_to->clkevt.irq);
cpu_to->clkevt.irq = 0;
goto out_irq;
@@ -342,9 +344,11 @@ static int __init tegra_init_timer(struct device_node *np, bool tegra20)
register_current_timer_delay(&tegra_delay_timer);
- cpuhp_setup_state(CPUHP_AP_TEGRA_TIMER_STARTING,
- "AP_TEGRA_TIMER_STARTING", tegra_timer_setup,
- tegra_timer_stop);
+ ret = cpuhp_setup_state(CPUHP_AP_TEGRA_TIMER_STARTING,
+ "AP_TEGRA_TIMER_STARTING", tegra_timer_setup,
+ tegra_timer_stop);
+ if (ret)
+ pr_err("failed to set up cpu hp state: %d\n", ret);
return ret;
out_irq:
@@ -383,17 +387,17 @@ static int __init tegra20_init_rtc(struct device_node *np)
rtc_base = of_iomap(np, 0);
if (!rtc_base) {
- pr_err("Can't map RTC registers\n");
+ pr_err("failed to map rtc registers\n");
return -ENXIO;
}
/*
- * rtc registers are used by read_persistent_clock, keep the rtc clock
+ * RTC registers are used by read_persistent_clock, keep the RTC clock
* enabled
*/
clk = of_clk_get(np, 0);
if (IS_ERR(clk))
- pr_warn("Unable to get rtc-tegra clock\n");
+ pr_warn("failed to get rtc-tegra clock\n");
else
clk_prepare_enable(clk);
--
2.21.0
