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authorDmitry Osipenko <digetx@gmail.com>2019-06-03 21:59:44 +0300
committerDaniel Lezcano <daniel.lezcano@linaro.org>2019-06-25 19:49:18 +0200
commit49a678b8ca4c4f40bb2775369c82c9faabfc4a59 (patch)
treed0ed504936095cbfc495b1a6cbf6c201a03447b9 /drivers/clocksource
parent7a3916706e858ad0bc3b5629c68168e1449de26a (diff)
clocksource/drivers/tegra: Minor code clean up
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@gmail.com> Acked-By: Peter De Schrijver <pdeschrijver@nvidia.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Diffstat (limited to 'drivers/clocksource')
-rw-r--r--drivers/clocksource/timer-tegra20.c43
1 files changed, 24 insertions, 19 deletions
diff --git a/drivers/clocksource/timer-tegra20.c b/drivers/clocksource/timer-tegra20.c
index e2ef6b8211a5..6a3704142f31 100644
--- a/drivers/clocksource/timer-tegra20.c
+++ b/drivers/clocksource/timer-tegra20.c
@@ -6,6 +6,8 @@
* Colin Cross <ccross@google.com>
*/
+#define pr_fmt(fmt) "tegra-timer: " fmt
+
#include <linux/clk.h>
#include <linux/clockchips.h>
#include <linux/cpu.h>
@@ -21,13 +23,13 @@
#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)
@@ -48,7 +50,7 @@ static u32 usec_config;
static void __iomem *timer_reg_base;
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));
@@ -169,15 +171,17 @@ static struct timer_of suspend_rtc_to = {
/*
* 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
*/
static u64 tegra_rtc_read_ms(struct clocksource *cs)
{
void __iomem *reg_base = timer_of_base(&suspend_rtc_to);
+
u32 ms = readl_relaxed(reg_base + RTC_MILLISECONDS);
u32 s = readl_relaxed(reg_base + RTC_SHADOW_SECONDS);
+
return (u64)s * MSEC_PER_SEC + ms;
}
@@ -222,7 +226,7 @@ static int __init tegra_init_timer(struct device_node *np, bool tegra20)
to = this_cpu_ptr(&tegra_to);
ret = timer_of_init(np, to);
- if (ret < 0)
+ if (ret)
goto out;
timer_reg_base = timer_of_base(to);
@@ -281,8 +285,7 @@ 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;
}
@@ -292,8 +295,8 @@ 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;
@@ -312,11 +315,14 @@ static int __init tegra_init_timer(struct device_node *np, bool tegra20)
register_current_timer_delay(&tegra_delay_timer);
#endif
- 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:
for_each_possible_cpu(cpu) {
struct timer_of *cpu_to;
@@ -329,6 +335,7 @@ out_irq:
}
out:
timer_of_cleanup(to);
+
return ret;
}
@@ -352,8 +359,6 @@ static int __init tegra20_init_rtc(struct device_node *np)
if (ret)
return ret;
- clocksource_register_hz(&suspend_rtc_clocksource, 1000);
-
- return 0;
+ return clocksource_register_hz(&suspend_rtc_clocksource, 1000);
}
TIMER_OF_DECLARE(tegra20_rtc, "nvidia,tegra20-rtc", tegra20_init_rtc);