[PATCH] ARM: dts: renesas: r9a06g032: add second clock input to RTC

[PATCH] ARM: dts: renesas: r9a06g032: add second clock input to RTC

[Wolfram Sang]

The external rtc clock is populated on the RZ/N1D module, so describe it
and add a reference to the RTC node.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---

The dependencies are now in -next, so we can update the DT, too.
Discussion leading to this result is here:

https://lore.kernel.org/r/20250319110305.19687-2-wsa+renesas@sang-engineering.com

 arch/arm/boot/dts/renesas/r9a06g032-rzn1d400-db.dts | 4 ++++
 arch/arm/boot/dts/renesas/r9a06g032.dtsi            | 4 ++--
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/renesas/r9a06g032-rzn1d400-db.dts b/arch/arm/boot/dts/renesas/r9a06g032-rzn1d400-db.dts
index d734a432b3ec..3258b2e27434 100644
--- a/arch/arm/boot/dts/renesas/r9a06g032-rzn1d400-db.dts
+++ b/arch/arm/boot/dts/renesas/r9a06g032-rzn1d400-db.dts
@@ -171,6 +171,10 @@ &eth_miic {
 	renesas,miic-switch-portin = <MIIC_GMAC2_PORT>;
 };
 
+&ext_rtc_clk {
+	clock-frequency = <32768>;
+};
+
 &gmac2 {
 	status = "okay";
 	phy-mode = "gmii";
diff --git a/arch/arm/boot/dts/renesas/r9a06g032.dtsi b/arch/arm/boot/dts/renesas/r9a06g032.dtsi
index 80ad1fdc77a0..13a60656b044 100644
--- a/arch/arm/boot/dts/renesas/r9a06g032.dtsi
+++ b/arch/arm/boot/dts/renesas/r9a06g032.dtsi
@@ -73,8 +73,8 @@ rtc0: rtc@40006000 {
 				     <GIC_SPI 67 IRQ_TYPE_EDGE_RISING>,
 				     <GIC_SPI 68 IRQ_TYPE_EDGE_RISING>;
 			interrupt-names = "alarm", "timer", "pps";
-			clocks = <&sysctrl R9A06G032_HCLK_RTC>;
-			clock-names = "hclk";
+			clocks = <&sysctrl R9A06G032_HCLK_RTC>, <&ext_rtc_clk>;
+			clock-names = "hclk", "xtal";
 			power-domains = <&sysctrl>;
 			status = "disabled";
 		};
-- 
2.47.2

Re: [PATCH] ARM: dts: renesas: r9a06g032: add second clock input to RTC

[Geert Uytterhoeven]

On Wed, 4 Jun 2025 at 10:42, Wolfram Sang
<wsa+renesas@sang-engineering.com> wrote:
> The external rtc clock is populated on the RZ/N1D module, so describe it
> and add a reference to the RTC node.
>
> Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
> ---
>
> The dependencies are now in -next, so we can update the DT, too.
> Discussion leading to this result is here:

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
i.e. will queue in renesas-devel for v6.17.

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