Currently all OSTM devices are called "ostm", also in kernel messages.
As there can be multiple instances in an SoC, this can confuse the user.
Hence construct a unique name from the DT node name, like is done for
platform devices.
On RSK+RZA1, the boot log changes like:
-clocksource: ostm: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns:
57352151442 ns
+clocksource: ostm fcfec000.timer: mask: 0xffffffff max_cycles: 0xffffffff,
max_idle_ns: 57352151442 ns
sched_clock: 32 bits at 33MHz, resolution 30ns, wraps every 64440619504ns
-ostm: used for clocksource
-ostm: used for clock events
+ostm fcfec000.timer: used for clocksource
+ostm fcfec400.timer: used for clock events
Signed-off-by: Geert Uytterhoeven <geert+rene...@glider.be>
---
v3:
- Make the name format similar to the one used for platform devices,
- Use kasprintf() instead of buffer size guessing,
- Use a real example from rskrza1.
v2 (by Jacopo):
- Use np->full_name.
---
drivers/clocksource/renesas-ostm.c | 45 ++++++++++++++++++++----------
1 file changed, 30 insertions(+), 15 deletions(-)
diff --git a/drivers/clocksource/renesas-ostm.c
b/drivers/clocksource/renesas-ostm.c
index 1e22e54d7b0df40d..659e3ec7b86714e3 100644
--- a/drivers/clocksource/renesas-ostm.c
+++ b/drivers/clocksource/renesas-ostm.c
@@ -25,6 +25,7 @@
*/
struct ostm_device {
+ const char *name;
void __iomem *base;
unsigned long ticks_per_jiffy;
struct clock_event_device ced;
@@ -79,9 +80,8 @@ static int __init ostm_init_clksrc(struct ostm_device *ostm,
unsigned long rate)
writeb(CTL_FREERUN, ostm->base + OSTM_CTL);
writeb(TS, ostm->base + OSTM_TS);
- return clocksource_mmio_init(ostm->base + OSTM_CNT,
- "ostm", rate,
- 300, 32, clocksource_mmio_readl_up);
+ return clocksource_mmio_init(ostm->base + OSTM_CNT, ostm->name, rate,
+ 300, 32, clocksource_mmio_readl_up);
}
static u64 notrace ostm_read_sched_clock(void)
@@ -161,15 +161,14 @@ static int __init ostm_init_clkevt(struct ostm_device
*ostm, unsigned int irq,
struct clock_event_device *ced = &ostm->ced;
int ret = -ENXIO;
- ret = request_irq(irq, ostm_timer_interrupt,
- IRQF_TIMER | IRQF_IRQPOLL,
- "ostm", ostm);
+ ret = request_irq(irq, ostm_timer_interrupt, IRQF_TIMER | IRQF_IRQPOLL,
+ ostm->name, ostm);
if (ret) {
- pr_err("ostm: failed to request irq\n");
+ pr_err("%s: Failed to request irq\n", ostm->name);
return ret;
}
- ced->name = "ostm";
+ ced->name = ostm->name;
ced->features = CLOCK_EVT_FEAT_ONESHOT | CLOCK_EVT_FEAT_PERIODIC;
ced->set_state_shutdown = ostm_shutdown;
ced->set_state_periodic = ostm_set_periodic;
@@ -187,6 +186,7 @@ static int __init ostm_init(struct device_node *np)
{
struct clk *ostm_clk = NULL;
struct ostm_device *ostm;
+ struct resource res;
unsigned long rate;
unsigned int irq;
int ret;
@@ -195,22 +195,35 @@ static int __init ostm_init(struct device_node *np)
if (!ostm)
return -ENOMEM;
- ostm->base = of_iomap(np, 0);
- if (!ostm->base) {
+ ret = of_address_to_resource(np, 0, &res);
+ if (ret) {
+ pr_err("ostm: Failed to obtain I/O memory\n");
+ goto err_free;
+ }
+
+ ostm->name = kasprintf(GFP_KERNEL, "ostm %llx.%s",
+ (unsigned long long)res.start, np->name);
+ if (!ostm->name) {
ret = -ENOMEM;
goto err_free;
}
+ ostm->base = ioremap(res.start, resource_size(&res));
+ if (!ostm->base) {
+ ret = -ENOMEM;
+ goto err_free_name;
+ }
+
irq = irq_of_parse_and_map(np, 0);
if (!irq) {
- pr_err("ostm: Failed to get irq\n");
+ pr_err("%s: Failed to get irq\n", ostm->name);
ret = -EINVAL;
goto err_unmap;
}
ostm_clk = of_clk_get(np, 0);
if (IS_ERR(ostm_clk)) {
- pr_err("ostm: Failed to get clock\n");
+ pr_err("%s: Failed to get clock\n", ostm->name);
ostm_clk = NULL;
ret = PTR_ERR(ostm_clk);
goto err_unmap;
@@ -218,7 +231,7 @@ static int __init ostm_init(struct device_node *np)
ret = clk_prepare_enable(ostm_clk);
if (ret) {
- pr_err("ostm: Failed to enable clock\n");
+ pr_err("%s: Failed to enable clock\n", ostm->name);
goto err_clk_put;
}
@@ -235,13 +248,13 @@ static int __init ostm_init(struct device_node *np)
goto err_clk_disable;
ostm_init_sched_clock(ostm, rate);
- pr_info("ostm: used for clocksource\n");
+ pr_info("%s: used for clocksource\n", ostm->name);
} else {
ret = ostm_init_clkevt(ostm, irq, rate);
if (ret)
goto err_clk_disable;
- pr_info("ostm: used for clock events\n");
+ pr_info("%s: used for clock events\n", ostm->name);
}
return 0;
@@ -252,6 +265,8 @@ static int __init ostm_init(struct device_node *np)
clk_put(ostm_clk);
err_unmap:
iounmap(ostm->base);
+err_free_name:
+ kfree(ostm->name);
err_free:
kfree(ostm);
return ret;
--
2.17.1
