[PATCH 0/2] Add RTC clocks for R9A09G077/87

[PATCH 0/2] Add RTC clocks for R9A09G077/87

[Prabhakar]

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

Hi all,

This patch series adds RTC clocks for R9A09G077/87 SoCs. The first patch
adds the PCLKRTC clock ID to the device tree bindings, and the second
patch adds the RTC clocks to the Renesas R9A09G077 clock driver.

Note this patch series applies on top of the patch series "Add PLL3 and
LCDC_CLKD support for RZ/T2H and RZ/N2H" [0].

[0] https://lore.kernel.org/all/20260615104845.4122868-1-prabhakar.mahadev-lad.rj@bp.renesas.com/

Cheers,
Prabhakar

Lad Prabhakar (2):
  dt-bindings: clock: renesas,r9a09g077/87: Add PCLKRTC clock ID
  clk: renesas: r9a09g077: Add RTC clocks

 drivers/clk/renesas/r9a09g077-cpg.c                    | 4 +++-
 include/dt-bindings/clock/renesas,r9a09g077-cpg-mssr.h | 1 +
 include/dt-bindings/clock/renesas,r9a09g087-cpg-mssr.h | 1 +
 3 files changed, 5 insertions(+), 1 deletion(-)

-- 
2.54.0

[PATCH 1/2] dt-bindings: clock: renesas,r9a09g077/87: Add PCLKRTC clock ID

[Prabhakar]

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

Add the peripheral clock ID definition for the Real-Time Clock (PCLKRTC)
on the Renesas RZ/T2H (R9A09G077) and RZ/N2H (R9A09G087) SoCs.

Note that the LCDC_CLKD clock is utilized as the operating clock source
for the RTC IP.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
 include/dt-bindings/clock/renesas,r9a09g077-cpg-mssr.h | 1 +
 include/dt-bindings/clock/renesas,r9a09g087-cpg-mssr.h | 1 +
 2 files changed, 2 insertions(+)

diff --git a/include/dt-bindings/clock/renesas,r9a09g077-cpg-mssr.h b/include/dt-bindings/clock/renesas,r9a09g077-cpg-mssr.h
index f6cb8d649a46..aa47685f329a 100644
--- a/include/dt-bindings/clock/renesas,r9a09g077-cpg-mssr.h
+++ b/include/dt-bindings/clock/renesas,r9a09g077-cpg-mssr.h
@@ -35,5 +35,6 @@
 #define R9A09G077_XSPI_CLK1		23
 #define R9A09G077_PCLKCAN		24
 #define R9A09G077_LCDC_CLKD		25
+#define R9A09G077_PCLKRTC		26
 
 #endif /* __DT_BINDINGS_CLOCK_RENESAS_R9A09G077_CPG_H__ */
diff --git a/include/dt-bindings/clock/renesas,r9a09g087-cpg-mssr.h b/include/dt-bindings/clock/renesas,r9a09g087-cpg-mssr.h
index 312e563b322e..1c73d0dcef18 100644
--- a/include/dt-bindings/clock/renesas,r9a09g087-cpg-mssr.h
+++ b/include/dt-bindings/clock/renesas,r9a09g087-cpg-mssr.h
@@ -35,5 +35,6 @@
 #define R9A09G087_XSPI_CLK1		23
 #define R9A09G087_PCLKCAN		24
 #define R9A09G087_LCDC_CLKD		25
+#define R9A09G087_PCLKRTC		26
 
 #endif /* __DT_BINDINGS_CLOCK_RENESAS_R9A09G087_CPG_H__ */
-- 
2.54.0

Re: [PATCH 1/2] dt-bindings: clock: renesas,r9a09g077/87: Add PCLKRTC clock ID

[Conor Dooley]

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Acked-by: Conor Dooley <conor.dooley@microchip.com>
pw-bot: not-applicable

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Re: [PATCH 1/2] dt-bindings: clock: renesas,r9a09g077/87: Add PCLKRTC clock ID

[Geert Uytterhoeven]

Hi Prabhakar,

Thanks for your patch!

On Mon, 15 Jun 2026 at 16:40, Prabhakar <prabhakar.csengg@gmail.com> wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
>
> Add the peripheral clock ID definition for the Real-Time Clock (PCLKRTC)
> on the Renesas RZ/T2H (R9A09G077) and RZ/N2H (R9A09G087) SoCs.
>
> Note that the LCDC_CLKD clock is utilized as the operating clock source

PCLKRTC

> for the RTC IP.
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
i.e. will queue in a branch shared by renesas-clk and renesas-dts
with the above fixed.

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 1/2] dt-bindings: clock: renesas,r9a09g077/87: Add PCLKRTC clock ID

[Lad, Prabhakar]

Hi Geert,

Thank you for the review.

On Wed, Jun 17, 2026 at 11:19 AM Geert Uytterhoeven
<geert@linux-m68k.org> wrote:
>
> Hi Prabhakar,
>
> Thanks for your patch!
>
> On Mon, 15 Jun 2026 at 16:40, Prabhakar <prabhakar.csengg@gmail.com> wrote:
> > From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> >
> > Add the peripheral clock ID definition for the Real-Time Clock (PCLKRTC)
> > on the Renesas RZ/T2H (R9A09G077) and RZ/N2H (R9A09G087) SoCs.
> >
> > Note that the LCDC_CLKD clock is utilized as the operating clock source
>
> PCLKRTC
>
Oops my bad!

> > for the RTC IP.
> >
> > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
>
> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
> i.e. will queue in a branch shared by renesas-clk and renesas-dts
> with the above fixed.
>
Thank you for taking care of this issue.

Cheers,
Prabhakar

> 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

[PATCH 2/2] clk: renesas: r9a09g077: Add RTC clocks

[Prabhakar]

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

Add the core and module clock definitions for the Real-Time Clock (RTC)
peripheral on the Renesas RZ/T2H (R9A09G077) and RZ/N2H (R9A09G087) SoCs.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
 drivers/clk/renesas/r9a09g077-cpg.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/renesas/r9a09g077-cpg.c b/drivers/clk/renesas/r9a09g077-cpg.c
index 873c41ae5606..5640c2035e5a 100644
--- a/drivers/clk/renesas/r9a09g077-cpg.c
+++ b/drivers/clk/renesas/r9a09g077-cpg.c
@@ -149,7 +149,7 @@ static const struct rzv2h_pll_limits r9a09g077_cpg_pll3_limits = {
 
 enum clk_ids {
 	/* Core Clock Outputs exported to DT */
-	LAST_DT_CORE_CLK = R9A09G077_LCDC_CLKD,
+	LAST_DT_CORE_CLK = R9A09G077_PCLKRTC,
 
 	/* External Input Clocks */
 	CLK_EXTAL,
@@ -337,6 +337,7 @@ static const struct cpg_core_clk r9a09g077_core_clks[] __initconst = {
 		sel_clk_pll4d3_div10_div20, ARRAY_SIZE(sel_clk_pll4d3_div10_div20), 0),
 	DEF_DIV_LCDC("LCDC_CLKD", R9A09G077_LCDC_CLKD, CLK_SEL_CLK_PLL3, LCDCDIVSEL,
 		     dtable_2_32),
+	DEF_FIXED("PCLKRTC", R9A09G077_PCLKRTC, CLK_EXTAL, 128, 1),
 };
 
 static const struct mssr_mod_clk r9a09g077_mod_clks[] __initconst = {
@@ -367,6 +368,7 @@ static const struct mssr_mod_clk r9a09g077_mod_clks[] __initconst = {
 	DEF_MOD("sci5fck", 600, CLK_SCI5ASYNC),
 	DEF_MOD("iic2", 601, R9A09G077_CLK_PCLKL),
 	DEF_MOD("spi3", 602, CLK_SPI3ASYNC),
+	DEF_MOD("rtc", 605, R9A09G077_CLK_PCLKL),
 	DEF_MOD("lcdc", 1204, R9A09G077_CLK_PCLKAL),
 	DEF_MOD("sdhi0", 1212, R9A09G077_CLK_PCLKAM),
 	DEF_MOD("sdhi1", 1213, R9A09G077_CLK_PCLKAM),
-- 
2.54.0

Re: [PATCH 2/2] clk: renesas: r9a09g077: Add RTC clocks

[Geert Uytterhoeven]

On Mon, 15 Jun 2026 at 16:40, Prabhakar <prabhakar.csengg@gmail.com> wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
>
> Add the core and module clock definitions for the Real-Time Clock (RTC)
> peripheral on the Renesas RZ/T2H (R9A09G077) and RZ/N2H (R9A09G087) SoCs.
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
i.e. will queue in renesas-clk for v7.3.

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