[PATCH v2 0/2] Add OSTM support for Renesas RZ/V2H(P) SoC

[PATCH v2 0/2] Add OSTM support for Renesas RZ/V2H(P) SoC

[Prabhakar]

From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

Hi,

This patch series aims to add OSTM support for Renesas RZ/V2H(P) SoC.
RZ/V2H(P) SoC has 8 GTM channels.

v1->v2
- Inlcuded Ack/RB tag
- Updated commit description for patch 2/2

v1: https://patchwork.kernel.org/project/linux-renesas-soc/cover/20240318160731.33960-1-prabhakar.mahadev-lad.rj@bp.renesas.com/

Cheers,
Prabhakar

Lad Prabhakar (2):
  dt-bindings: timer: renesas: ostm: Document Renesas RZ/V2H(P) SoC
  clocksource/drivers/renesas-ostm: Allow OSTM driver to reprobe for
    RZ/V2H(P) SoC

 Documentation/devicetree/bindings/timer/renesas,ostm.yaml | 2 ++
 drivers/clocksource/renesas-ostm.c                        | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

-- 
2.34.1

[PATCH v2 1/2] dt-bindings: timer: renesas: ostm: Document Renesas RZ/V2H(P) SoC

[Prabhakar]

From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

Document the General Timer Module (a.k.a OSTM) block on Renesas RZ/V2H(P)
("R9A09G057") SoC, which is identical to the one found on the RZ/A1H and
RZ/G2L SoCs. Add the "renesas,r9a09g057-ostm" compatible string for the
RZ/V2H(P) SoC.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
---
v1->v2
- Included Ack and RB tags
---
 Documentation/devicetree/bindings/timer/renesas,ostm.yaml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/timer/renesas,ostm.yaml b/Documentation/devicetree/bindings/timer/renesas,ostm.yaml
index 8b06a681764e..e8c642166462 100644
--- a/Documentation/devicetree/bindings/timer/renesas,ostm.yaml
+++ b/Documentation/devicetree/bindings/timer/renesas,ostm.yaml
@@ -26,6 +26,7 @@ properties:
           - renesas,r9a07g043-ostm # RZ/G2UL and RZ/Five
           - renesas,r9a07g044-ostm # RZ/G2{L,LC}
           - renesas,r9a07g054-ostm # RZ/V2L
+          - renesas,r9a09g057-ostm # RZ/V2H(P)
       - const: renesas,ostm        # Generic
 
   reg:
@@ -58,6 +59,7 @@ if:
           - renesas,r9a07g043-ostm
           - renesas,r9a07g044-ostm
           - renesas,r9a07g054-ostm
+          - renesas,r9a09g057-ostm
 then:
   required:
     - resets
-- 
2.34.1

[PATCH v2 2/2] clocksource/drivers/renesas-ostm: Allow OSTM driver to reprobe for RZ/V2H(P) SoC

[Prabhakar]

From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

The RZ/V2H(P) (R9A09G057) SoC is equipped with the Generic Timer Module,
also known as OSTM. Similar to the RZ/G2L SoC, the OSTM on the RZ/V2H(P)
SoC requires the reset line to be deasserted before accessing any
registers.

Early call to ostm_init() happens through TIMER_OF_DECLARE() which always
fails with -EPROBE_DEFER, as resets are not available that early in the
boot process.  To address this issue on the RZ/V2H(P) SoC, enable the OSTM
driver to be reprobed through the platform driver probe mechanism.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
v1->v2
- Updated commit description
- Dropped usage of IS_ENABLED() and used defined() instead
---
 drivers/clocksource/renesas-ostm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clocksource/renesas-ostm.c b/drivers/clocksource/renesas-ostm.c
index 8da972dc1713..39487d05a009 100644
--- a/drivers/clocksource/renesas-ostm.c
+++ b/drivers/clocksource/renesas-ostm.c
@@ -224,7 +224,7 @@ static int __init ostm_init(struct device_node *np)
 
 TIMER_OF_DECLARE(ostm, "renesas,ostm", ostm_init);
 
-#ifdef CONFIG_ARCH_RZG2L
+#if defined(CONFIG_ARCH_RZG2L) || defined(CONFIG_ARCH_R9A09G057)
 static int __init ostm_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
-- 
2.34.1

Re: [PATCH v2 2/2] clocksource/drivers/renesas-ostm: Allow OSTM driver to reprobe for RZ/V2H(P) SoC

[Geert Uytterhoeven]

On Fri, Mar 22, 2024 at 4:13 PM Prabhakar <prabhakar.csengg@gmail.com> wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
>
> The RZ/V2H(P) (R9A09G057) SoC is equipped with the Generic Timer Module,
> also known as OSTM. Similar to the RZ/G2L SoC, the OSTM on the RZ/V2H(P)
> SoC requires the reset line to be deasserted before accessing any
> registers.
>
> Early call to ostm_init() happens through TIMER_OF_DECLARE() which always
> fails with -EPROBE_DEFER, as resets are not available that early in the
> boot process.  To address this issue on the RZ/V2H(P) SoC, enable the OSTM
> driver to be reprobed through the platform driver probe mechanism.
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> ---
> v1->v2
> - Updated commit description
> - Dropped usage of IS_ENABLED() and used defined() instead

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

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

Re: [PATCH v2 0/2] Add OSTM support for Renesas RZ/V2H(P) SoC

[Daniel Lezcano]

On 22/03/2024 16:12, Prabhakar wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> 
> Hi,
> 
> This patch series aims to add OSTM support for Renesas RZ/V2H(P) SoC.
> RZ/V2H(P) SoC has 8 GTM channels.
> 
> v1->v2
> - Inlcuded Ack/RB tag
> - Updated commit description for patch 2/2
> 
> v1: https://patchwork.kernel.org/project/linux-renesas-soc/cover/20240318160731.33960-1-prabhakar.mahadev-lad.rj@bp.renesas.com/

Applied, thanks

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