We are migrating from Android 12.0 to 12.1. The Android 12.0 build was modified to use spi-imx.c from AN13633 (Using Enhanced Configurable SPI (ECSPI) as Slave in Linux for i.MX 8M
Series). When migrating to 12.1, the probe of the driver returns an error code of -22.
[ 0.399225] spi_imx 30820000.spi: bitbang start failed with -22
[ 0.399241] spi_imx: probe of 30820000.spi failed with error -22
When I changed out the spi-imx.c from 12.1 for the one from AN13633, The probe appears to work, but now spi_busnum_to_master() fails.
[ 88.391582] spiCtrl_init: MASTER not found
I don't see what has changed from Android 12.0 to 12.1. Any insights would be appreciated.
#define MASTER_BUS_NUM 0
//Register information about your device:
struct spi_board_info spi_device_info = {
.modalias = "PECL-master-command-port",
.max_speed_hz = 13000000, //speed your device (slave) can handle
.bus_num = MASTER_BUS_NUM,
.chip_select = 0,
.mode = 0,
};
pr_debug("%s: Start\n", __func__);
/* To send data we have to know what spi port/pins should be used. This information
* can be found in the device-tree. */
master = spi_busnum_to_master( spi_device_info.bus_num );
if ( !master ) {
pr_err("%s: MASTER not found\n", __func__);
return -ENODEV;
}
Device Tree:
&ecspi1 {
#address-cells = <1>;
#size-cells = <0>;
fsl,spi-num-chipselects = <1>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_ecspi1>;
//cs-gpios = GP_ECSPI1_CS;
status = "okay";
};
