2019-10-09 19:49:21

by Alexandre Belloni

Subject: [PATCH] ARM: configs: at91: unselect PIT

The PIT is not required anymore to successfully boot and may actually harm
in case preempt-rt is used because the PIT interrupt is shared.
Disable it so the TCB clocksource is used.

Signed-off-by: Alexandre Belloni <[email protected]>
---
arch/arm/configs/at91_dt_defconfig | 1 +
arch/arm/configs/sama5_defconfig | 1 +
2 files changed, 2 insertions(+)

diff --git a/arch/arm/configs/at91_dt_defconfig b/arch/arm/configs/at91_dt_defconfig
index 63d09e61b6dc..7e5ffdab47da 100644
--- a/arch/arm/configs/at91_dt_defconfig
+++ b/arch/arm/configs/at91_dt_defconfig
@@ -18,6 +18,7 @@ CONFIG_ARCH_MULTI_V5=y
CONFIG_ARCH_AT91=y
CONFIG_SOC_AT91RM9200=y
CONFIG_SOC_AT91SAM9=y
+# CONFIG_ATMEL_CLOCKSOURCE_PIT is not set
CONFIG_AEABI=y
CONFIG_UACCESS_WITH_MEMCPY=y
CONFIG_ZBOOT_ROM_TEXT=0x0
diff --git a/arch/arm/configs/sama5_defconfig b/arch/arm/configs/sama5_defconfig
index 7255709d46ea..ee7db6cedaa6 100644
--- a/arch/arm/configs/sama5_defconfig
+++ b/arch/arm/configs/sama5_defconfig
@@ -20,6 +20,7 @@ CONFIG_ARCH_AT91=y
CONFIG_SOC_SAMA5D2=y
CONFIG_SOC_SAMA5D3=y
CONFIG_SOC_SAMA5D4=y
+# CONFIG_ATMEL_CLOCKSOURCE_PIT is not set
CONFIG_AEABI=y
CONFIG_UACCESS_WITH_MEMCPY=y
CONFIG_ZBOOT_ROM_TEXT=0x0
--
2.21.0

2019-10-10 09:00:13

by Nicolas Ferre

Subject: Re: [PATCH] ARM: configs: at91: unselect PIT

On 09/10/2019 at 21:48, Alexandre Belloni wrote:

> The PIT is not required anymore to successfully boot and may actually harm
> in case preempt-rt is used because the PIT interrupt is shared.
> Disable it so the TCB clocksource is used.
>
> Signed-off-by: Alexandre Belloni <[email protected]>

Acked-by: Nicolas Ferre <[email protected]>

> ---
> arch/arm/configs/at91_dt_defconfig | 1 +
> arch/arm/configs/sama5_defconfig | 1 +
> 2 files changed, 2 insertions(+)
>
> diff --git a/arch/arm/configs/at91_dt_defconfig b/arch/arm/configs/at91_dt_defconfig
> index 63d09e61b6dc..7e5ffdab47da 100644
> --- a/arch/arm/configs/at91_dt_defconfig
> +++ b/arch/arm/configs/at91_dt_defconfig
> @@ -18,6 +18,7 @@ CONFIG_ARCH_MULTI_V5=y
> CONFIG_ARCH_AT91=y
> CONFIG_SOC_AT91RM9200=y
> CONFIG_SOC_AT91SAM9=y
> +# CONFIG_ATMEL_CLOCKSOURCE_PIT is not set
> CONFIG_AEABI=y
> CONFIG_UACCESS_WITH_MEMCPY=y
> CONFIG_ZBOOT_ROM_TEXT=0x0
> diff --git a/arch/arm/configs/sama5_defconfig b/arch/arm/configs/sama5_defconfig
> index 7255709d46ea..ee7db6cedaa6 100644
> --- a/arch/arm/configs/sama5_defconfig
> +++ b/arch/arm/configs/sama5_defconfig
> @@ -20,6 +20,7 @@ CONFIG_ARCH_AT91=y
> CONFIG_SOC_SAMA5D2=y
> CONFIG_SOC_SAMA5D3=y
> CONFIG_SOC_SAMA5D4=y
> +# CONFIG_ATMEL_CLOCKSOURCE_PIT is not set
> CONFIG_AEABI=y
> CONFIG_UACCESS_WITH_MEMCPY=y
> CONFIG_ZBOOT_ROM_TEXT=0x0
>


--
Nicolas Ferre

2019-10-10 11:51:33

by Alexander Dahl

Subject: Re: [PATCH] ARM: configs: at91: unselect PIT

Am Mittwoch, 9. Oktober 2019, 21:48:14 CEST schrieb Alexandre Belloni:
> The PIT is not required anymore to successfully boot and may actually harm
> in case preempt-rt is used because the PIT interrupt is shared.
> Disable it so the TCB clocksource is used.
>
> Signed-off-by: Alexandre Belloni <[email protected]>

Acked-by: Alexander Dahl <[email protected]>

> ---
> arch/arm/configs/at91_dt_defconfig | 1 +
> arch/arm/configs/sama5_defconfig | 1 +
> 2 files changed, 2 insertions(+)
>
> diff --git a/arch/arm/configs/at91_dt_defconfig
> b/arch/arm/configs/at91_dt_defconfig index 63d09e61b6dc..7e5ffdab47da
> 100644
> --- a/arch/arm/configs/at91_dt_defconfig
> +++ b/arch/arm/configs/at91_dt_defconfig
> @@ -18,6 +18,7 @@ CONFIG_ARCH_MULTI_V5=y
> CONFIG_ARCH_AT91=y
> CONFIG_SOC_AT91RM9200=y
> CONFIG_SOC_AT91SAM9=y
> +# CONFIG_ATMEL_CLOCKSOURCE_PIT is not set
> CONFIG_AEABI=y
> CONFIG_UACCESS_WITH_MEMCPY=y
> CONFIG_ZBOOT_ROM_TEXT=0x0
> diff --git a/arch/arm/configs/sama5_defconfig
> b/arch/arm/configs/sama5_defconfig index 7255709d46ea..ee7db6cedaa6 100644
> --- a/arch/arm/configs/sama5_defconfig
> +++ b/arch/arm/configs/sama5_defconfig
> @@ -20,6 +20,7 @@ CONFIG_ARCH_AT91=y
> CONFIG_SOC_SAMA5D2=y
> CONFIG_SOC_SAMA5D3=y
> CONFIG_SOC_SAMA5D4=y
> +# CONFIG_ATMEL_CLOCKSOURCE_PIT is not set
> CONFIG_AEABI=y
> CONFIG_UACCESS_WITH_MEMCPY=y
> CONFIG_ZBOOT_ROM_TEXT=0x0