On 26.09.2018 06:53, Chen-Yu Tsai wrote:
The Pine64 Rock64 board comes with a GigaDevice GD25Q128CSIG
or GD25Q127CSIG chip, which is a 128 Mbit SPI NOR flash chip
that supports the JEDEC read-ID command.
This patch enables the SPI controller and adds a device node
for the flash chip using the generic "jedec,spi-nor" comaptible.
Signed-off-by: Chen-Yu Tsai <wens@xxxxxxxx>
---
This was working on linux-next 20180910, but now fails on linux-next
20180925, with the following error messages:
m25p80 spi0.0: error -22 reading 9f
m25p80: probe of spi0.0 failed with error -2
Reverting the spi/for-next branch makes it work again:
m25p80 spi0.0: gd25q128 (16384 Kbytes)
Not sure what's up.
The reason is probably an issue that was introduced here: [1], and it
was fixed here: [2].
[1]
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/drivers/spi?id=380583227c0c7f52383b0cd5c0e2de93ed31d553
[2]
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/drivers/spi?id=4c53f98555fdbf1cc291cab8ffa5e1507a4f25d9
---
arch/arm64/boot/dts/rockchip/rk3328-rock64.dts | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/arch/arm64/boot/dts/rockchip/rk3328-rock64.dts b/arch/arm64/boot/dts/rockchip/rk3328-rock64.dts
index 9ee4f57557f3..2170cf63845e 100644
--- a/arch/arm64/boot/dts/rockchip/rk3328-rock64.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3328-rock64.dts
@@ -290,6 +290,18 @@
};
};
+&spi0 {
+ status = "okay";
+
+ spiflash@0 {
+ compatible = "jedec,spi-nor";
+ reg = <0>;
+
+ /* maximum speed for Rockchip SPI */
+ spi-max-frequency = <50000000>;
+ };
+};
+
&tsadc {
rockchip,hw-tshut-mode = <0>;
rockchip,hw-tshut-polarity = <0>;
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