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ARM: dts: at91: sama5d2_xplained: Add QSPI0 + SPI NOR memory nodes 

This patch enables the QSPI0 controller, configures its pin muxing and
declares a jedec,spi-nor memory.

sama5d2 Xplained RevB and RevC use the Macronix MX25L25673G flash
memory which advertises a maximum frequency of 80MHz for Quad IO
Fast Read. Set the spi-max-frequency to 80MHz knowing that actually
the QSPI drver will set the SPI bus clock to 166MHz / 3 = 55.3MHz.

Signed-off-by: Cyrille Pitchen <cyrille.pitchen@microchip.com>
Tested-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/r/20200403061222.1277147-3-tudor.ambarus@microchip.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Cyrille Pitchen 2020-04-03 06:12:26 +00:00 committed by Alexandre Belloni
parent 0fd3a8f58f
commit 51cca920ce
1 changed files with 68 additions and 0 deletions
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68
arch/arm/boot/dts/at91-sama5d2_xplained.dts
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@ -72,6 +72,58 @@
};
apb {
qspi0: spi@f0020000 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_qspi0_default>;
status = "disabled"; /* conflict with sdmmc1 */
flash@0 {
#address-cells = <1>;
#size-cells = <1>;
compatible = "jedec,spi-nor";
reg = <0>;
spi-max-frequency = <80000000>;
spi-tx-bus-width = <4>;
spi-rx-bus-width = <4>;
m25p,fast-read;
at91bootstrap@00000000 {
label = "at91bootstrap";
reg = <0x00000000 0x00040000>;
};
bootloader@00040000 {
label = "bootloader";
reg = <0x00040000 0x000c0000>;
};
bootloaderenvred@00100000 {
label = "bootloader env redundant";
reg = <0x00100000 0x00040000>;
};
bootloaderenv@00140000 {
label = "bootloader env";
reg = <0x00140000 0x00040000>;
};
dtb@00180000 {
label = "device tree";
reg = <0x00180000 0x00080000>;
};
kernel@00200000 {
label = "kernel";
reg = <0x00200000 0x00600000>;
};
misc@00800000 {
label = "misc";
reg = <0x00800000 0x00000000>;
};
};
};
spi0: spi@f8000000 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_spi0_default>;
@ -535,6 +587,22 @@
bias-disable;
};
pinctrl_qspi0_default: qspi0_default {
sck_cs {
pinmux = <PIN_PA22__QSPI0_SCK>,
<PIN_PA23__QSPI0_CS>;
bias-disable;
};
data {
pinmux = <PIN_PA24__QSPI0_IO0>,
<PIN_PA25__QSPI0_IO1>,
<PIN_PA26__QSPI0_IO2>,
<PIN_PA27__QSPI0_IO3>;
bias-pull-up;
};
};
pinctrl_sdmmc0_default: sdmmc0_default {
cmd_data {
pinmux = <PIN_PA1__SDMMC0_CMD>,