From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
To: Geert Uytterhoeven <geert+renesas@glider.be>,
Magnus Damm <magnus.damm@gmail.com>,
Rob Herring <robh+dt@kernel.org>
Cc: linux-renesas-soc@vger.kernel.or, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org,
Prabhakar <prabhakar.csengg@gmail.com>,
Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Subject: [PATCH v2] ARM: dts: r8a7742-iwg21m: Add SPI NOR support
Date: Tue, 25 Aug 2020 09:54:35 +0100 [thread overview]
Message-ID: <20200825085435.8744-1-prabhakar.mahadev-lad.rj@bp.renesas.com> (raw)
Add support for the SPI NOR device used to boot up the system
to the System on Module DT.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Chris Paterson <Chris.Paterson2@renesas.com>
---
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
next reply other threads:[~2020-08-25 8:54 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-25 8:54 Lad Prabhakar [this message]
2020-08-25 13:21 ` [PATCH v2] ARM: dts: r8a7742-iwg21m: Add SPI NOR support Geert Uytterhoeven
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