[PATCH] clocksource/drivers/timer-sun4i: Partially convert to a platform driver

[PATCH] clocksource/drivers/timer-sun4i: Partially convert to a platform driver

[Samuel Holland]

Commit 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a
platform driver") broke the MMIO timer on the Allwinner D1 SoC because
the IRQ domain is no longer available when timer_probe() is called:

  [    0.000000] irq: no irq domain found for interrupt-controller@10000000 !
  [    0.000000] Failed to map interrupt for /soc/timer@2050000
  [    0.000000] Failed to initialize '/soc/timer@2050000': -22

Fix this by wrapping the timer initialization in a platform driver.
builtin_platform_driver_probe() must be used because the driver uses
timer_of_init(), which is marked as __init. Only convert the sun8i
variants of the hardware, because some older SoCs still need the timer
probed early for sched_clock().

Fixes: 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a platform driver")
Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
---

 drivers/clocksource/timer-sun4i.c | 24 ++++++++++++++++++++----
 1 file changed, 20 insertions(+), 4 deletions(-)

diff --git a/drivers/clocksource/timer-sun4i.c b/drivers/clocksource/timer-sun4i.c
index 7bdcc60ad43c..728dac2baa84 100644
--- a/drivers/clocksource/timer-sun4i.c
+++ b/drivers/clocksource/timer-sun4i.c
@@ -20,6 +20,7 @@
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
+#include <linux/platform_device.h>
 
 #include "timer-of.h"
 
@@ -218,9 +219,24 @@ static int __init sun4i_timer_init(struct device_node *node)
 }
 TIMER_OF_DECLARE(sun4i, "allwinner,sun4i-a10-timer",
 		       sun4i_timer_init);
-TIMER_OF_DECLARE(sun8i_a23, "allwinner,sun8i-a23-timer",
-		 sun4i_timer_init);
-TIMER_OF_DECLARE(sun8i_v3s, "allwinner,sun8i-v3s-timer",
-		 sun4i_timer_init);
 TIMER_OF_DECLARE(suniv, "allwinner,suniv-f1c100s-timer",
 		       sun4i_timer_init);
+
+static int __init sun4i_timer_probe(struct platform_device *pdev)
+{
+	return sun4i_timer_init(dev_of_node(&pdev->dev));
+}
+
+static const struct of_device_id sun4i_timer_of_match[] = {
+	{ .compatible = "allwinner,sun8i-a23-timer" },
+	{ .compatible = "allwinner,sun8i-v3s-timer" },
+	{ /* sentinel */ }
+};
+
+static struct platform_driver sun4i_timer_driver = {
+	.driver	= {
+		.name		= "sun4i-timer",
+		.of_match_table	= sun4i_timer_of_match,
+	},
+};
+builtin_platform_driver_probe(sun4i_timer_driver, sun4i_timer_probe);
-- 
2.43.1

[PATCH] clocksource/drivers/timer-sun4i: Partially convert to a platform driver

[Samuel Holland]

Commit 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a
platform driver") broke the MMIO timer on the Allwinner D1 SoC because
the IRQ domain is no longer available when timer_probe() is called:

  [    0.000000] irq: no irq domain found for interrupt-controller@10000000 !
  [    0.000000] Failed to map interrupt for /soc/timer@2050000
  [    0.000000] Failed to initialize '/soc/timer@2050000': -22

Fix this by wrapping the timer initialization in a platform driver.
builtin_platform_driver_probe() must be used because the driver uses
timer_of_init(), which is marked as __init. Only convert the sun8i
variants of the hardware, because some older SoCs still need the timer
probed early for sched_clock().

Fixes: 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a platform driver")
Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
---

 drivers/clocksource/timer-sun4i.c | 24 ++++++++++++++++++++----
 1 file changed, 20 insertions(+), 4 deletions(-)

diff --git a/drivers/clocksource/timer-sun4i.c b/drivers/clocksource/timer-sun4i.c
index 7bdcc60ad43c..728dac2baa84 100644
--- a/drivers/clocksource/timer-sun4i.c
+++ b/drivers/clocksource/timer-sun4i.c
@@ -20,6 +20,7 @@
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
+#include <linux/platform_device.h>
 
 #include "timer-of.h"
 
@@ -218,9 +219,24 @@ static int __init sun4i_timer_init(struct device_node *node)
 }
 TIMER_OF_DECLARE(sun4i, "allwinner,sun4i-a10-timer",
 		       sun4i_timer_init);
-TIMER_OF_DECLARE(sun8i_a23, "allwinner,sun8i-a23-timer",
-		 sun4i_timer_init);
-TIMER_OF_DECLARE(sun8i_v3s, "allwinner,sun8i-v3s-timer",
-		 sun4i_timer_init);
 TIMER_OF_DECLARE(suniv, "allwinner,suniv-f1c100s-timer",
 		       sun4i_timer_init);
+
+static int __init sun4i_timer_probe(struct platform_device *pdev)
+{
+	return sun4i_timer_init(dev_of_node(&pdev->dev));
+}
+
+static const struct of_device_id sun4i_timer_of_match[] = {
+	{ .compatible = "allwinner,sun8i-a23-timer" },
+	{ .compatible = "allwinner,sun8i-v3s-timer" },
+	{ /* sentinel */ }
+};
+
+static struct platform_driver sun4i_timer_driver = {
+	.driver	= {
+		.name		= "sun4i-timer",
+		.of_match_table	= sun4i_timer_of_match,
+	},
+};
+builtin_platform_driver_probe(sun4i_timer_driver, sun4i_timer_probe);
-- 
2.43.1


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[PATCH] clocksource/drivers/timer-sun4i: Partially convert to a platform driver

[Samuel Holland]

Commit 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a
platform driver") broke the MMIO timer on the Allwinner D1 SoC because
the IRQ domain is no longer available when timer_probe() is called:

  [    0.000000] irq: no irq domain found for interrupt-controller@10000000 !
  [    0.000000] Failed to map interrupt for /soc/timer@2050000
  [    0.000000] Failed to initialize '/soc/timer@2050000': -22

Fix this by wrapping the timer initialization in a platform driver.
builtin_platform_driver_probe() must be used because the driver uses
timer_of_init(), which is marked as __init. Only convert the sun8i
variants of the hardware, because some older SoCs still need the timer
probed early for sched_clock().

Fixes: 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a platform driver")
Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
---

 drivers/clocksource/timer-sun4i.c | 24 ++++++++++++++++++++----
 1 file changed, 20 insertions(+), 4 deletions(-)

diff --git a/drivers/clocksource/timer-sun4i.c b/drivers/clocksource/timer-sun4i.c
index 7bdcc60ad43c..728dac2baa84 100644
--- a/drivers/clocksource/timer-sun4i.c
+++ b/drivers/clocksource/timer-sun4i.c
@@ -20,6 +20,7 @@
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
+#include <linux/platform_device.h>
 
 #include "timer-of.h"
 
@@ -218,9 +219,24 @@ static int __init sun4i_timer_init(struct device_node *node)
 }
 TIMER_OF_DECLARE(sun4i, "allwinner,sun4i-a10-timer",
 		       sun4i_timer_init);
-TIMER_OF_DECLARE(sun8i_a23, "allwinner,sun8i-a23-timer",
-		 sun4i_timer_init);
-TIMER_OF_DECLARE(sun8i_v3s, "allwinner,sun8i-v3s-timer",
-		 sun4i_timer_init);
 TIMER_OF_DECLARE(suniv, "allwinner,suniv-f1c100s-timer",
 		       sun4i_timer_init);
+
+static int __init sun4i_timer_probe(struct platform_device *pdev)
+{
+	return sun4i_timer_init(dev_of_node(&pdev->dev));
+}
+
+static const struct of_device_id sun4i_timer_of_match[] = {
+	{ .compatible = "allwinner,sun8i-a23-timer" },
+	{ .compatible = "allwinner,sun8i-v3s-timer" },
+	{ /* sentinel */ }
+};
+
+static struct platform_driver sun4i_timer_driver = {
+	.driver	= {
+		.name		= "sun4i-timer",
+		.of_match_table	= sun4i_timer_of_match,
+	},
+};
+builtin_platform_driver_probe(sun4i_timer_driver, sun4i_timer_probe);
-- 
2.43.1


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Re: [PATCH] clocksource/drivers/timer-sun4i: Partially convert to a platform driver

[Daniel Lezcano]

On 12/03/2024 20:25, Samuel Holland wrote:
> Commit 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a
> platform driver") broke the MMIO timer on the Allwinner D1 SoC because
> the IRQ domain is no longer available when timer_probe() is called:
> 
>    [    0.000000] irq: no irq domain found for interrupt-controller@10000000 !
>    [    0.000000] Failed to map interrupt for /soc/timer@2050000
>    [    0.000000] Failed to initialize '/soc/timer@2050000': -22
> 
> Fix this by wrapping the timer initialization in a platform driver.
> builtin_platform_driver_probe() must be used because the driver uses
> timer_of_init(), which is marked as __init. Only convert the sun8i
> variants of the hardware, because some older SoCs still need the timer
> probed early for sched_clock().
> 
> Fixes: 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a platform driver")
> Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
> ---

Applied, thanks

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Re: [PATCH] clocksource/drivers/timer-sun4i: Partially convert to a platform driver

[Daniel Lezcano]

On 12/03/2024 20:25, Samuel Holland wrote:
> Commit 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a
> platform driver") broke the MMIO timer on the Allwinner D1 SoC because
> the IRQ domain is no longer available when timer_probe() is called:
> 
>    [    0.000000] irq: no irq domain found for interrupt-controller@10000000 !
>    [    0.000000] Failed to map interrupt for /soc/timer@2050000
>    [    0.000000] Failed to initialize '/soc/timer@2050000': -22
> 
> Fix this by wrapping the timer initialization in a platform driver.
> builtin_platform_driver_probe() must be used because the driver uses
> timer_of_init(), which is marked as __init. Only convert the sun8i
> variants of the hardware, because some older SoCs still need the timer
> probed early for sched_clock().
> 
> Fixes: 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a platform driver")
> Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
> ---

Applied, thanks

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Re: [PATCH] clocksource/drivers/timer-sun4i: Partially convert to a platform driver

[Daniel Lezcano]

On 12/03/2024 20:25, Samuel Holland wrote:
> Commit 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a
> platform driver") broke the MMIO timer on the Allwinner D1 SoC because
> the IRQ domain is no longer available when timer_probe() is called:
> 
>    [    0.000000] irq: no irq domain found for interrupt-controller@10000000 !
>    [    0.000000] Failed to map interrupt for /soc/timer@2050000
>    [    0.000000] Failed to initialize '/soc/timer@2050000': -22
> 
> Fix this by wrapping the timer initialization in a platform driver.
> builtin_platform_driver_probe() must be used because the driver uses
> timer_of_init(), which is marked as __init. Only convert the sun8i
> variants of the hardware, because some older SoCs still need the timer
> probed early for sched_clock().
> 
> Fixes: 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a platform driver")
> Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
> ---

Applied, thanks

-- 
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Re: [PATCH] clocksource/drivers/timer-sun4i: Partially convert to a platform driver

[Daniel Lezcano]

On 12/03/2024 20:25, Samuel Holland wrote:
> Commit 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a
> platform driver") broke the MMIO timer on the Allwinner D1 SoC because
> the IRQ domain is no longer available when timer_probe() is called:

Did you mean: s/no longer available/not yet available/ ?


>    [    0.000000] irq: no irq domain found for interrupt-controller@10000000 !
>    [    0.000000] Failed to map interrupt for /soc/timer@2050000
>    [    0.000000] Failed to initialize '/soc/timer@2050000': -22
> 
> Fix this by wrapping the timer initialization in a platform driver.
> builtin_platform_driver_probe() must be used because the driver uses
> timer_of_init(), which is marked as __init. Only convert the sun8i
> variants of the hardware, because some older SoCs still need the timer
> probed early for sched_clock().
> 
> Fixes: 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a platform driver")
> Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
> ---
> 
>   drivers/clocksource/timer-sun4i.c | 24 ++++++++++++++++++++----
>   1 file changed, 20 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/clocksource/timer-sun4i.c b/drivers/clocksource/timer-sun4i.c
> index 7bdcc60ad43c..728dac2baa84 100644
> --- a/drivers/clocksource/timer-sun4i.c
> +++ b/drivers/clocksource/timer-sun4i.c
> @@ -20,6 +20,7 @@
>   #include <linux/of.h>
>   #include <linux/of_address.h>
>   #include <linux/of_irq.h>
> +#include <linux/platform_device.h>
>   
>   #include "timer-of.h"
>   
> @@ -218,9 +219,24 @@ static int __init sun4i_timer_init(struct device_node *node)
>   }
>   TIMER_OF_DECLARE(sun4i, "allwinner,sun4i-a10-timer",
>   		       sun4i_timer_init);
> -TIMER_OF_DECLARE(sun8i_a23, "allwinner,sun8i-a23-timer",
> -		 sun4i_timer_init);
> -TIMER_OF_DECLARE(sun8i_v3s, "allwinner,sun8i-v3s-timer",
> -		 sun4i_timer_init);
>   TIMER_OF_DECLARE(suniv, "allwinner,suniv-f1c100s-timer",
>   		       sun4i_timer_init);
> +
> +static int __init sun4i_timer_probe(struct platform_device *pdev)
> +{
> +	return sun4i_timer_init(dev_of_node(&pdev->dev));
> +}
> +
> +static const struct of_device_id sun4i_timer_of_match[] = {
> +	{ .compatible = "allwinner,sun8i-a23-timer" },
> +	{ .compatible = "allwinner,sun8i-v3s-timer" },
> +	{ /* sentinel */ }
> +};
> +
> +static struct platform_driver sun4i_timer_driver = {
> +	.driver	= {
> +		.name		= "sun4i-timer",
> +		.of_match_table	= sun4i_timer_of_match,
> +	},
> +};
> +builtin_platform_driver_probe(sun4i_timer_driver, sun4i_timer_probe);

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Re: [PATCH] clocksource/drivers/timer-sun4i: Partially convert to a platform driver

[Daniel Lezcano]

On 12/03/2024 20:25, Samuel Holland wrote:
> Commit 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a
> platform driver") broke the MMIO timer on the Allwinner D1 SoC because
> the IRQ domain is no longer available when timer_probe() is called:

Did you mean: s/no longer available/not yet available/ ?


>    [    0.000000] irq: no irq domain found for interrupt-controller@10000000 !
>    [    0.000000] Failed to map interrupt for /soc/timer@2050000
>    [    0.000000] Failed to initialize '/soc/timer@2050000': -22
> 
> Fix this by wrapping the timer initialization in a platform driver.
> builtin_platform_driver_probe() must be used because the driver uses
> timer_of_init(), which is marked as __init. Only convert the sun8i
> variants of the hardware, because some older SoCs still need the timer
> probed early for sched_clock().
> 
> Fixes: 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a platform driver")
> Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
> ---
> 
>   drivers/clocksource/timer-sun4i.c | 24 ++++++++++++++++++++----
>   1 file changed, 20 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/clocksource/timer-sun4i.c b/drivers/clocksource/timer-sun4i.c
> index 7bdcc60ad43c..728dac2baa84 100644
> --- a/drivers/clocksource/timer-sun4i.c
> +++ b/drivers/clocksource/timer-sun4i.c
> @@ -20,6 +20,7 @@
>   #include <linux/of.h>
>   #include <linux/of_address.h>
>   #include <linux/of_irq.h>
> +#include <linux/platform_device.h>
>   
>   #include "timer-of.h"
>   
> @@ -218,9 +219,24 @@ static int __init sun4i_timer_init(struct device_node *node)
>   }
>   TIMER_OF_DECLARE(sun4i, "allwinner,sun4i-a10-timer",
>   		       sun4i_timer_init);
> -TIMER_OF_DECLARE(sun8i_a23, "allwinner,sun8i-a23-timer",
> -		 sun4i_timer_init);
> -TIMER_OF_DECLARE(sun8i_v3s, "allwinner,sun8i-v3s-timer",
> -		 sun4i_timer_init);
>   TIMER_OF_DECLARE(suniv, "allwinner,suniv-f1c100s-timer",
>   		       sun4i_timer_init);
> +
> +static int __init sun4i_timer_probe(struct platform_device *pdev)
> +{
> +	return sun4i_timer_init(dev_of_node(&pdev->dev));
> +}
> +
> +static const struct of_device_id sun4i_timer_of_match[] = {
> +	{ .compatible = "allwinner,sun8i-a23-timer" },
> +	{ .compatible = "allwinner,sun8i-v3s-timer" },
> +	{ /* sentinel */ }
> +};
> +
> +static struct platform_driver sun4i_timer_driver = {
> +	.driver	= {
> +		.name		= "sun4i-timer",
> +		.of_match_table	= sun4i_timer_of_match,
> +	},
> +};
> +builtin_platform_driver_probe(sun4i_timer_driver, sun4i_timer_probe);

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Re: [PATCH] clocksource/drivers/timer-sun4i: Partially convert to a platform driver

[Daniel Lezcano]

On 12/03/2024 20:25, Samuel Holland wrote:
> Commit 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a
> platform driver") broke the MMIO timer on the Allwinner D1 SoC because
> the IRQ domain is no longer available when timer_probe() is called:

Did you mean: s/no longer available/not yet available/ ?


>    [    0.000000] irq: no irq domain found for interrupt-controller@10000000 !
>    [    0.000000] Failed to map interrupt for /soc/timer@2050000
>    [    0.000000] Failed to initialize '/soc/timer@2050000': -22
> 
> Fix this by wrapping the timer initialization in a platform driver.
> builtin_platform_driver_probe() must be used because the driver uses
> timer_of_init(), which is marked as __init. Only convert the sun8i
> variants of the hardware, because some older SoCs still need the timer
> probed early for sched_clock().
> 
> Fixes: 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a platform driver")
> Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
> ---
> 
>   drivers/clocksource/timer-sun4i.c | 24 ++++++++++++++++++++----
>   1 file changed, 20 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/clocksource/timer-sun4i.c b/drivers/clocksource/timer-sun4i.c
> index 7bdcc60ad43c..728dac2baa84 100644
> --- a/drivers/clocksource/timer-sun4i.c
> +++ b/drivers/clocksource/timer-sun4i.c
> @@ -20,6 +20,7 @@
>   #include <linux/of.h>
>   #include <linux/of_address.h>
>   #include <linux/of_irq.h>
> +#include <linux/platform_device.h>
>   
>   #include "timer-of.h"
>   
> @@ -218,9 +219,24 @@ static int __init sun4i_timer_init(struct device_node *node)
>   }
>   TIMER_OF_DECLARE(sun4i, "allwinner,sun4i-a10-timer",
>   		       sun4i_timer_init);
> -TIMER_OF_DECLARE(sun8i_a23, "allwinner,sun8i-a23-timer",
> -		 sun4i_timer_init);
> -TIMER_OF_DECLARE(sun8i_v3s, "allwinner,sun8i-v3s-timer",
> -		 sun4i_timer_init);
>   TIMER_OF_DECLARE(suniv, "allwinner,suniv-f1c100s-timer",
>   		       sun4i_timer_init);
> +
> +static int __init sun4i_timer_probe(struct platform_device *pdev)
> +{
> +	return sun4i_timer_init(dev_of_node(&pdev->dev));
> +}
> +
> +static const struct of_device_id sun4i_timer_of_match[] = {
> +	{ .compatible = "allwinner,sun8i-a23-timer" },
> +	{ .compatible = "allwinner,sun8i-v3s-timer" },
> +	{ /* sentinel */ }
> +};
> +
> +static struct platform_driver sun4i_timer_driver = {
> +	.driver	= {
> +		.name		= "sun4i-timer",
> +		.of_match_table	= sun4i_timer_of_match,
> +	},
> +};
> +builtin_platform_driver_probe(sun4i_timer_driver, sun4i_timer_probe);

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Re: [PATCH] clocksource/drivers/timer-sun4i: Partially convert to a platform driver

[Daniel Lezcano]

On 12/03/2024 20:25, Samuel Holland wrote:
> Commit 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a
> platform driver") broke the MMIO timer on the Allwinner D1 SoC because
> the IRQ domain is no longer available when timer_probe() is called:
> 
>    [    0.000000] irq: no irq domain found for interrupt-controller@10000000 !
>    [    0.000000] Failed to map interrupt for /soc/timer@2050000
>    [    0.000000] Failed to initialize '/soc/timer@2050000': -22
> 
> Fix this by wrapping the timer initialization in a platform driver.
> builtin_platform_driver_probe() must be used because the driver uses
> timer_of_init(), which is marked as __init. Only convert the sun8i
> variants of the hardware, because some older SoCs still need the timer
> probed early for sched_clock().
> 
> Fixes: 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a platform driver")
> Signed-off-by: Samuel Holland <samuel.holland@sifive.com>

Why EPROBE_DEFER in thermal-of can not fix the issue?

I mean can't we check if of_irq_get_byname() returns EPROBE_DEFER and 
then return this value?

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Re: [PATCH] clocksource/drivers/timer-sun4i: Partially convert to a platform driver

[Daniel Lezcano]

On 12/03/2024 20:25, Samuel Holland wrote:
> Commit 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a
> platform driver") broke the MMIO timer on the Allwinner D1 SoC because
> the IRQ domain is no longer available when timer_probe() is called:
> 
>    [    0.000000] irq: no irq domain found for interrupt-controller@10000000 !
>    [    0.000000] Failed to map interrupt for /soc/timer@2050000
>    [    0.000000] Failed to initialize '/soc/timer@2050000': -22
> 
> Fix this by wrapping the timer initialization in a platform driver.
> builtin_platform_driver_probe() must be used because the driver uses
> timer_of_init(), which is marked as __init. Only convert the sun8i
> variants of the hardware, because some older SoCs still need the timer
> probed early for sched_clock().
> 
> Fixes: 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a platform driver")
> Signed-off-by: Samuel Holland <samuel.holland@sifive.com>

Why EPROBE_DEFER in thermal-of can not fix the issue?

I mean can't we check if of_irq_get_byname() returns EPROBE_DEFER and 
then return this value?

-- 
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Re: [PATCH] clocksource/drivers/timer-sun4i: Partially convert to a platform driver

[Daniel Lezcano]

On 12/03/2024 20:25, Samuel Holland wrote:
> Commit 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a
> platform driver") broke the MMIO timer on the Allwinner D1 SoC because
> the IRQ domain is no longer available when timer_probe() is called:
> 
>    [    0.000000] irq: no irq domain found for interrupt-controller@10000000 !
>    [    0.000000] Failed to map interrupt for /soc/timer@2050000
>    [    0.000000] Failed to initialize '/soc/timer@2050000': -22
> 
> Fix this by wrapping the timer initialization in a platform driver.
> builtin_platform_driver_probe() must be used because the driver uses
> timer_of_init(), which is marked as __init. Only convert the sun8i
> variants of the hardware, because some older SoCs still need the timer
> probed early for sched_clock().
> 
> Fixes: 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a platform driver")
> Signed-off-by: Samuel Holland <samuel.holland@sifive.com>

Why EPROBE_DEFER in thermal-of can not fix the issue?

I mean can't we check if of_irq_get_byname() returns EPROBE_DEFER and 
then return this value?

-- 
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Re: [PATCH] clocksource/drivers/timer-sun4i: Partially convert to a platform driver

[Samuel Holland]

On 2024-03-13 9:43 AM, Daniel Lezcano wrote:
> On 12/03/2024 20:25, Samuel Holland wrote:
>> Commit 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a
>> platform driver") broke the MMIO timer on the Allwinner D1 SoC because
>> the IRQ domain is no longer available when timer_probe() is called:
> 
> Did you mean: s/no longer available/not yet available/ ?

I mean that, before this commit, the IRQ domain was available during
timer_probe(); but after this commit, the IRQ domain is not available during
timer_probe().

>>    [    0.000000] irq: no irq domain found for interrupt-controller@10000000 !
>>    [    0.000000] Failed to map interrupt for /soc/timer@2050000
>>    [    0.000000] Failed to initialize '/soc/timer@2050000': -22
>>
>> Fix this by wrapping the timer initialization in a platform driver.
>> builtin_platform_driver_probe() must be used because the driver uses
>> timer_of_init(), which is marked as __init. Only convert the sun8i
>> variants of the hardware, because some older SoCs still need the timer
>> probed early for sched_clock().
>>
>> Fixes: 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a platform
>> driver")
>> Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
>> ---
>>
>>   drivers/clocksource/timer-sun4i.c | 24 ++++++++++++++++++++----
>>   1 file changed, 20 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/clocksource/timer-sun4i.c
>> b/drivers/clocksource/timer-sun4i.c
>> index 7bdcc60ad43c..728dac2baa84 100644
>> --- a/drivers/clocksource/timer-sun4i.c
>> +++ b/drivers/clocksource/timer-sun4i.c
>> @@ -20,6 +20,7 @@
>>   #include <linux/of.h>
>>   #include <linux/of_address.h>
>>   #include <linux/of_irq.h>
>> +#include <linux/platform_device.h>
>>     #include "timer-of.h"
>>   @@ -218,9 +219,24 @@ static int __init sun4i_timer_init(struct device_node
>> *node)
>>   }
>>   TIMER_OF_DECLARE(sun4i, "allwinner,sun4i-a10-timer",
>>                  sun4i_timer_init);
>> -TIMER_OF_DECLARE(sun8i_a23, "allwinner,sun8i-a23-timer",
>> -         sun4i_timer_init);
>> -TIMER_OF_DECLARE(sun8i_v3s, "allwinner,sun8i-v3s-timer",
>> -         sun4i_timer_init);
>>   TIMER_OF_DECLARE(suniv, "allwinner,suniv-f1c100s-timer",
>>                  sun4i_timer_init);
>> +
>> +static int __init sun4i_timer_probe(struct platform_device *pdev)
>> +{
>> +    return sun4i_timer_init(dev_of_node(&pdev->dev));
>> +}
>> +
>> +static const struct of_device_id sun4i_timer_of_match[] = {
>> +    { .compatible = "allwinner,sun8i-a23-timer" },
>> +    { .compatible = "allwinner,sun8i-v3s-timer" },
>> +    { /* sentinel */ }
>> +};
>> +
>> +static struct platform_driver sun4i_timer_driver = {
>> +    .driver    = {
>> +        .name        = "sun4i-timer",
>> +        .of_match_table    = sun4i_timer_of_match,
>> +    },
>> +};
>> +builtin_platform_driver_probe(sun4i_timer_driver, sun4i_timer_probe);
> 

Re: [PATCH] clocksource/drivers/timer-sun4i: Partially convert to a platform driver

[Samuel Holland]

On 2024-03-13 9:43 AM, Daniel Lezcano wrote:
> On 12/03/2024 20:25, Samuel Holland wrote:
>> Commit 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a
>> platform driver") broke the MMIO timer on the Allwinner D1 SoC because
>> the IRQ domain is no longer available when timer_probe() is called:
> 
> Did you mean: s/no longer available/not yet available/ ?

I mean that, before this commit, the IRQ domain was available during
timer_probe(); but after this commit, the IRQ domain is not available during
timer_probe().

>>    [    0.000000] irq: no irq domain found for interrupt-controller@10000000 !
>>    [    0.000000] Failed to map interrupt for /soc/timer@2050000
>>    [    0.000000] Failed to initialize '/soc/timer@2050000': -22
>>
>> Fix this by wrapping the timer initialization in a platform driver.
>> builtin_platform_driver_probe() must be used because the driver uses
>> timer_of_init(), which is marked as __init. Only convert the sun8i
>> variants of the hardware, because some older SoCs still need the timer
>> probed early for sched_clock().
>>
>> Fixes: 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a platform
>> driver")
>> Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
>> ---
>>
>>   drivers/clocksource/timer-sun4i.c | 24 ++++++++++++++++++++----
>>   1 file changed, 20 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/clocksource/timer-sun4i.c
>> b/drivers/clocksource/timer-sun4i.c
>> index 7bdcc60ad43c..728dac2baa84 100644
>> --- a/drivers/clocksource/timer-sun4i.c
>> +++ b/drivers/clocksource/timer-sun4i.c
>> @@ -20,6 +20,7 @@
>>   #include <linux/of.h>
>>   #include <linux/of_address.h>
>>   #include <linux/of_irq.h>
>> +#include <linux/platform_device.h>
>>     #include "timer-of.h"
>>   @@ -218,9 +219,24 @@ static int __init sun4i_timer_init(struct device_node
>> *node)
>>   }
>>   TIMER_OF_DECLARE(sun4i, "allwinner,sun4i-a10-timer",
>>                  sun4i_timer_init);
>> -TIMER_OF_DECLARE(sun8i_a23, "allwinner,sun8i-a23-timer",
>> -         sun4i_timer_init);
>> -TIMER_OF_DECLARE(sun8i_v3s, "allwinner,sun8i-v3s-timer",
>> -         sun4i_timer_init);
>>   TIMER_OF_DECLARE(suniv, "allwinner,suniv-f1c100s-timer",
>>                  sun4i_timer_init);
>> +
>> +static int __init sun4i_timer_probe(struct platform_device *pdev)
>> +{
>> +    return sun4i_timer_init(dev_of_node(&pdev->dev));
>> +}
>> +
>> +static const struct of_device_id sun4i_timer_of_match[] = {
>> +    { .compatible = "allwinner,sun8i-a23-timer" },
>> +    { .compatible = "allwinner,sun8i-v3s-timer" },
>> +    { /* sentinel */ }
>> +};
>> +
>> +static struct platform_driver sun4i_timer_driver = {
>> +    .driver    = {
>> +        .name        = "sun4i-timer",
>> +        .of_match_table    = sun4i_timer_of_match,
>> +    },
>> +};
>> +builtin_platform_driver_probe(sun4i_timer_driver, sun4i_timer_probe);
> 


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Re: [PATCH] clocksource/drivers/timer-sun4i: Partially convert to a platform driver

[Samuel Holland]

On 2024-03-13 9:43 AM, Daniel Lezcano wrote:
> On 12/03/2024 20:25, Samuel Holland wrote:
>> Commit 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a
>> platform driver") broke the MMIO timer on the Allwinner D1 SoC because
>> the IRQ domain is no longer available when timer_probe() is called:
> 
> Did you mean: s/no longer available/not yet available/ ?

I mean that, before this commit, the IRQ domain was available during
timer_probe(); but after this commit, the IRQ domain is not available during
timer_probe().

>>    [    0.000000] irq: no irq domain found for interrupt-controller@10000000 !
>>    [    0.000000] Failed to map interrupt for /soc/timer@2050000
>>    [    0.000000] Failed to initialize '/soc/timer@2050000': -22
>>
>> Fix this by wrapping the timer initialization in a platform driver.
>> builtin_platform_driver_probe() must be used because the driver uses
>> timer_of_init(), which is marked as __init. Only convert the sun8i
>> variants of the hardware, because some older SoCs still need the timer
>> probed early for sched_clock().
>>
>> Fixes: 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a platform
>> driver")
>> Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
>> ---
>>
>>   drivers/clocksource/timer-sun4i.c | 24 ++++++++++++++++++++----
>>   1 file changed, 20 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/clocksource/timer-sun4i.c
>> b/drivers/clocksource/timer-sun4i.c
>> index 7bdcc60ad43c..728dac2baa84 100644
>> --- a/drivers/clocksource/timer-sun4i.c
>> +++ b/drivers/clocksource/timer-sun4i.c
>> @@ -20,6 +20,7 @@
>>   #include <linux/of.h>
>>   #include <linux/of_address.h>
>>   #include <linux/of_irq.h>
>> +#include <linux/platform_device.h>
>>     #include "timer-of.h"
>>   @@ -218,9 +219,24 @@ static int __init sun4i_timer_init(struct device_node
>> *node)
>>   }
>>   TIMER_OF_DECLARE(sun4i, "allwinner,sun4i-a10-timer",
>>                  sun4i_timer_init);
>> -TIMER_OF_DECLARE(sun8i_a23, "allwinner,sun8i-a23-timer",
>> -         sun4i_timer_init);
>> -TIMER_OF_DECLARE(sun8i_v3s, "allwinner,sun8i-v3s-timer",
>> -         sun4i_timer_init);
>>   TIMER_OF_DECLARE(suniv, "allwinner,suniv-f1c100s-timer",
>>                  sun4i_timer_init);
>> +
>> +static int __init sun4i_timer_probe(struct platform_device *pdev)
>> +{
>> +    return sun4i_timer_init(dev_of_node(&pdev->dev));
>> +}
>> +
>> +static const struct of_device_id sun4i_timer_of_match[] = {
>> +    { .compatible = "allwinner,sun8i-a23-timer" },
>> +    { .compatible = "allwinner,sun8i-v3s-timer" },
>> +    { /* sentinel */ }
>> +};
>> +
>> +static struct platform_driver sun4i_timer_driver = {
>> +    .driver    = {
>> +        .name        = "sun4i-timer",
>> +        .of_match_table    = sun4i_timer_of_match,
>> +    },
>> +};
>> +builtin_platform_driver_probe(sun4i_timer_driver, sun4i_timer_probe);
> 


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Re: [PATCH] clocksource/drivers/timer-sun4i: Partially convert to a platform driver

[Samuel Holland]

On 2024-03-13 10:29 AM, Daniel Lezcano wrote:
> On 12/03/2024 20:25, Samuel Holland wrote:
>> Commit 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a
>> platform driver") broke the MMIO timer on the Allwinner D1 SoC because
>> the IRQ domain is no longer available when timer_probe() is called:
>>
>>    [    0.000000] irq: no irq domain found for interrupt-controller@10000000 !
>>    [    0.000000] Failed to map interrupt for /soc/timer@2050000
>>    [    0.000000] Failed to initialize '/soc/timer@2050000': -22
>>
>> Fix this by wrapping the timer initialization in a platform driver.
>> builtin_platform_driver_probe() must be used because the driver uses
>> timer_of_init(), which is marked as __init. Only convert the sun8i
>> variants of the hardware, because some older SoCs still need the timer
>> probed early for sched_clock().
>>
>> Fixes: 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a platform
>> driver")
>> Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
> 
> Why EPROBE_DEFER in thermal-of can not fix the issue?
> 
> I mean can't we check if of_irq_get_byname() returns EPROBE_DEFER and then
> return this value?

EPROBE_DEFER would not help either before or after this patch.

Before this patch, the driver uses TIMER_OF_DECLARE, which means the timer gets
initialized from the loop in timer_probe(). That function does not retry if the
initialization function returns EPROBE_DEFER. And timer_probe() is only meant to
be called once, before any platform drivers are registered.

It does not help after this patch either, because __platform_driver_probe() also
requires the probe to succeed the first time. This is needed to ensure the probe
function runs before __init memory is discarded. (To support deferred probing in
timer-of, none of the functions could be marked as __init.)

But that is okay, because if both the irqchip and the timer use platform
drivers, fw_devlink ensures they are probed in the right order. So this patch
reliably allows the timer to probe successfully.

Regards,
Samuel

Re: [PATCH] clocksource/drivers/timer-sun4i: Partially convert to a platform driver

[Samuel Holland]

On 2024-03-13 10:29 AM, Daniel Lezcano wrote:
> On 12/03/2024 20:25, Samuel Holland wrote:
>> Commit 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a
>> platform driver") broke the MMIO timer on the Allwinner D1 SoC because
>> the IRQ domain is no longer available when timer_probe() is called:
>>
>>    [    0.000000] irq: no irq domain found for interrupt-controller@10000000 !
>>    [    0.000000] Failed to map interrupt for /soc/timer@2050000
>>    [    0.000000] Failed to initialize '/soc/timer@2050000': -22
>>
>> Fix this by wrapping the timer initialization in a platform driver.
>> builtin_platform_driver_probe() must be used because the driver uses
>> timer_of_init(), which is marked as __init. Only convert the sun8i
>> variants of the hardware, because some older SoCs still need the timer
>> probed early for sched_clock().
>>
>> Fixes: 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a platform
>> driver")
>> Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
> 
> Why EPROBE_DEFER in thermal-of can not fix the issue?
> 
> I mean can't we check if of_irq_get_byname() returns EPROBE_DEFER and then
> return this value?

EPROBE_DEFER would not help either before or after this patch.

Before this patch, the driver uses TIMER_OF_DECLARE, which means the timer gets
initialized from the loop in timer_probe(). That function does not retry if the
initialization function returns EPROBE_DEFER. And timer_probe() is only meant to
be called once, before any platform drivers are registered.

It does not help after this patch either, because __platform_driver_probe() also
requires the probe to succeed the first time. This is needed to ensure the probe
function runs before __init memory is discarded. (To support deferred probing in
timer-of, none of the functions could be marked as __init.)

But that is okay, because if both the irqchip and the timer use platform
drivers, fw_devlink ensures they are probed in the right order. So this patch
reliably allows the timer to probe successfully.

Regards,
Samuel


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Re: [PATCH] clocksource/drivers/timer-sun4i: Partially convert to a platform driver

[Samuel Holland]

On 2024-03-13 10:29 AM, Daniel Lezcano wrote:
> On 12/03/2024 20:25, Samuel Holland wrote:
>> Commit 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a
>> platform driver") broke the MMIO timer on the Allwinner D1 SoC because
>> the IRQ domain is no longer available when timer_probe() is called:
>>
>>    [    0.000000] irq: no irq domain found for interrupt-controller@10000000 !
>>    [    0.000000] Failed to map interrupt for /soc/timer@2050000
>>    [    0.000000] Failed to initialize '/soc/timer@2050000': -22
>>
>> Fix this by wrapping the timer initialization in a platform driver.
>> builtin_platform_driver_probe() must be used because the driver uses
>> timer_of_init(), which is marked as __init. Only convert the sun8i
>> variants of the hardware, because some older SoCs still need the timer
>> probed early for sched_clock().
>>
>> Fixes: 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a platform
>> driver")
>> Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
> 
> Why EPROBE_DEFER in thermal-of can not fix the issue?
> 
> I mean can't we check if of_irq_get_byname() returns EPROBE_DEFER and then
> return this value?

EPROBE_DEFER would not help either before or after this patch.

Before this patch, the driver uses TIMER_OF_DECLARE, which means the timer gets
initialized from the loop in timer_probe(). That function does not retry if the
initialization function returns EPROBE_DEFER. And timer_probe() is only meant to
be called once, before any platform drivers are registered.

It does not help after this patch either, because __platform_driver_probe() also
requires the probe to succeed the first time. This is needed to ensure the probe
function runs before __init memory is discarded. (To support deferred probing in
timer-of, none of the functions could be marked as __init.)

But that is okay, because if both the irqchip and the timer use platform
drivers, fw_devlink ensures they are probed in the right order. So this patch
reliably allows the timer to probe successfully.

Regards,
Samuel


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