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 <[email protected]>
---
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
On Wed, Aug 07, 2019 at 10:46:35AM +0200, Geert Uytterhoeven wrote:
> 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 <[email protected]>
> ---
> 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);
I'm not sure, but looking at printk-formats.rst it seems that
%pa[p] as a format specifier for resource_size_t. If so it may
allow dropping the cast above.
> + 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
>
On Fri, Aug 16, 2019 at 03:11:29PM +0200, Simon Horman wrote:
> On Wed, Aug 07, 2019 at 10:46:35AM +0200, Geert Uytterhoeven wrote:
> > 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 <[email protected]>
The nit in my previous email notwithstanding
Reviewed-by: Simon Horman <[email protected]>
> > ---
> > 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);
>
> I'm not sure, but looking at printk-formats.rst it seems that
> %pa[p] as a format specifier for resource_size_t. If so it may
> allow dropping the cast above.
>
> > + 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
> >
>
Hi Simon,
On Fri, Aug 16, 2019 at 3:11 PM Simon Horman <[email protected]> wrote:
> On Wed, Aug 07, 2019 at 10:46:35AM +0200, Geert Uytterhoeven wrote:
> > 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 <[email protected]>
> > ---
> > 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
> > @@ -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);
>
> I'm not sure, but looking at printk-formats.rst it seems that
> %pa[p] as a format specifier for resource_size_t. If so it may
> allow dropping the cast above.
Using "%pa" adds a "0x" prefix, which we don't want here.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email protected]
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
On Fri, Aug 16, 2019 at 03:18:06PM +0200, Geert Uytterhoeven wrote:
> Hi Simon,
>
> On Fri, Aug 16, 2019 at 3:11 PM Simon Horman <[email protected]> wrote:
> > On Wed, Aug 07, 2019 at 10:46:35AM +0200, Geert Uytterhoeven wrote:
> > > 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 <[email protected]>
> > > ---
> > > 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
>
> > > @@ -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);
> >
> > I'm not sure, but looking at printk-formats.rst it seems that
> > %pa[p] as a format specifier for resource_size_t. If so it may
> > allow dropping the cast above.
>
> Using "%pa" adds a "0x" prefix, which we don't want here.
Thanks, got it.