2020-08-25 09:10:12

by Prabhakar Mahadev Lad

Subject: [PATCH v2] ARM: dts: r8a7742-iwg21m: Add SPI NOR support

Add support for the SPI NOR device used to boot up the system
to the System on Module DT.

Signed-off-by: Lad Prabhakar <[email protected]>
Reviewed-by: Chris Paterson <[email protected]>
---
Hi all,

This patch is part of series [1], since rest of the patches have been
acked I am just resending patch 3/3 from the series.

[1] https://patchwork.kernel.org/project/linux-renesas-soc/list/?series=333197

v1->v2
* Dropped #address-cells/#size-cells from flash node.
* Added partitions for flash node.
---
arch/arm/boot/dts/r8a7742-iwg21m.dtsi | 51 +++++++++++++++++++++++++++
1 file changed, 51 insertions(+)

diff --git a/arch/arm/boot/dts/r8a7742-iwg21m.dtsi b/arch/arm/boot/dts/r8a7742-iwg21m.dtsi
index 0f26807f92b8..5621c9ed698f 100644
--- a/arch/arm/boot/dts/r8a7742-iwg21m.dtsi
+++ b/arch/arm/boot/dts/r8a7742-iwg21m.dtsi
@@ -35,6 +35,16 @@
clock-frequency = <20000000>;
};

+&gpio0 {
+ /* GP0_18 set low to select QSPI. Doing so will disable VIN2 */
+ qspi_en {
+ gpio-hog;
+ gpios = <18 GPIO_ACTIVE_HIGH>;
+ output-low;
+ line-name = "QSPI_EN";
+ };
+};
+
&i2c0 {
pinctrl-0 = <&i2c0_pins>;
pinctrl-names = "default";
@@ -70,4 +80,45 @@
groups = "mmc1_data4", "mmc1_ctrl";
function = "mmc1";
};
+
+ qspi_pins: qspi {
+ groups = "qspi_ctrl", "qspi_data2";
+ function = "qspi";
+ };
+};
+
+&qspi {
+ pinctrl-0 = <&qspi_pins>;
+ pinctrl-names = "default";
+
+ status = "okay";
+
+ flash: flash@0 {
+ compatible = "sst,sst25vf016b", "jedec,spi-nor";
+ reg = <0>;
+ spi-max-frequency = <50000000>;
+ m25p,fast-read;
+ spi-cpol;
+ spi-cpha;
+
+ partitions {
+ compatible = "fixed-partitions";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ partition@0 {
+ label = "bootloader";
+ reg = <0x00000000 0x000c0000>;
+ read-only;
+ };
+ partition@c0000 {
+ label = "env";
+ reg = <0x000c0000 0x00002000>;
+ };
+ partition@c2000 {
+ label = "user";
+ reg = <0x000c2000 0x0013e000>;
+ };
+ };
+ };
};
--
2.17.1

2020-08-25 13:22:57

by Geert Uytterhoeven

Subject: Re: [PATCH v2] ARM: dts: r8a7742-iwg21m: Add SPI NOR support

On Tue, Aug 25, 2020 at 10:54 AM Lad Prabhakar
<[email protected]> wrote:
> Add support for the SPI NOR device used to boot up the system
> to the System on Module DT.
>
> Signed-off-by: Lad Prabhakar <[email protected]>
> Reviewed-by: Chris Paterson <[email protected]>
> ---
> Hi all,
>
> This patch is part of series [1], since rest of the patches have been
> acked I am just resending patch 3/3 from the series.
>
> [1] https://patchwork.kernel.org/project/linux-renesas-soc/list/?series=333197
>
> v1->v2
> * Dropped #address-cells/#size-cells from flash node.
> * Added partitions for flash node.

Thanks for the update!

Reviewed-by: Geert Uytterhoeven <[email protected]>
i.e. will queue in renesas-devel for v5.10.

Gr{oetje,eeting}s,

Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email protected]

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