diff options
authorXuzhou Cheng <xuzhou.cheng@windriver.com>2021-09-27 22:28:25 +0800
committerPeter Maydell <peter.maydell@linaro.org>2021-09-30 13:44:13 +0100
commit1f4b2ec701b9d73d3fa7bb90c8b4376bc7d3c42b (patch)
parent82c74ac42e1b9e564a3c011dca6215d130b7e6a0 (diff)
hw/arm: sabrelite: Connect SPI flash CS line to GPIO3_19pull-target-arm-20210930target-arm.nexttarget-arm.for-upstream
The Linux spi-imx driver does not work on QEMU. The reason is that the state of m25p80 loops in STATE_READING_DATA state after receiving RDSR command, the new command is ignored. Before sending a new command, CS line should be pulled high to make the state of m25p80 back to IDLE. Currently the SPI flash CS line is connected to the SPI controller, but on the real board, it's connected to GPIO3_19. This matches the ecspi1 device node in the board dts. ecspi1 node in imx6qdl-sabrelite.dtsi: &ecspi1 { cs-gpios = <&gpio3 19 GPIO_ACTIVE_LOW>; pinctrl-names = "default"; pinctrl-0 = <&pinctrl_ecspi1>; status = "okay"; flash: m25p80@0 { compatible = "sst,sst25vf016b", "jedec,spi-nor"; spi-max-frequency = <20000000>; reg = <0>; }; }; Should connect the SSI_GPIO_CS to GPIO3_19 when adding a spi-nor to spi1 on sabrelite machine. Verified this patch on Linux v5.14. Logs: # echo "01234567899876543210" > test # mtd_debug erase /dev/mtd0 0x0 0x1000 Erased 4096 bytes from address 0x00000000 in flash # mtd_debug write /dev/mtdblock0 0x0 20 test Copied 20 bytes from test to address 0x00000000 in flash # mtd_debug read /dev/mtdblock0 0x0 20 test_out Copied 20 bytes from address 0x00000000 in flash to test_out # cat test_out 01234567899876543210# Signed-off-by: Xuzhou Cheng <xuzhou.cheng@windriver.com> Reported-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Bin Meng <bin.meng@windriver.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-id: 20210927142825.491-1-xchengl.cn@gmail.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
1 files changed, 1 insertions, 1 deletions
diff --git a/hw/arm/sabrelite.c b/hw/arm/sabrelite.c
index 29fc777b61..553608e583 100644
--- a/hw/arm/sabrelite.c
+++ b/hw/arm/sabrelite.c
@@ -87,7 +87,7 @@ static void sabrelite_init(MachineState *machine)
qdev_realize_and_unref(flash_dev, BUS(spi_bus), &error_fatal);
cs_line = qdev_get_gpio_in_named(flash_dev, SSI_GPIO_CS, 0);
- sysbus_connect_irq(SYS_BUS_DEVICE(spi_dev), 1, cs_line);
+ qdev_connect_gpio_out(DEVICE(&s->gpio[2]), 19, cs_line);