Hi all,
I'm working with kernel 2.6.21.3 on Freescale iMXL-based platform.
I have to write a SPI protocol driver for Quantum QT510 touch controller.
As starting point for board-init code I used the driver released by
Pavel Pisa:
http://rtime.felk.cvut.cz/repos/ppisa-linux-devel/kernel-patches/current/pimx1-board-spi.patch
In protocol driver I defined spi_driver like this:
static struct spi_driver qt510_driver = {
.driver = {
.name = QT510_MODALIAS,
.owner = THIS_MODULE,
},
.probe = qt510_probe,
.remove = __devexit_p(qt510_remove),
};
static int __init qt510_init(void)
{
return spi_register_driver(&qt510_driver);
}
module_init(qt510_init);
In board-init code I used the same name for modalias field:
static struct spi_board_info parsy_spi_board_infos[] __initdata = {
{
.modalias = "loopback",
.max_speed_hz = 1600000,
.bus_num = 1,
.chip_select = 0x00,
.mode = SPI_MODE_0,
.controller_data = &spi_controller_data[0],
},
{
.modalias = QT510_MODALIAS,
.max_speed_hz = QT510_SPI_CLK_MAX,
.bus_num = 1,
.chip_select = 0x01,
.mode = SPI_MODE_3,
.controller_data = &spi_controller_data[1],
},
{
.modalias = "tbd",
.max_speed_hz = 1600000,
.bus_num = 1,
.chip_select = 0x2,
.mode = SPI_MODE_0,
.controller_data = &spi_controller_data[2],
},
};
However the probe function (qt510_probe) is never invoked.
In my understanding this is due to the fact that there are no devices
associated to the bus:
bash-3.00# ls -la /sys/bus/spi/devices/
total 0
drwxr-xr-x 2 root root 0 Jan 1 1970 .
drwxr-xr-x 4 root root 0 Jan 1 1970 ..
bash-3.00# ls -la /sys/bus/spi/drivers/
total 0
drwxr-xr-x 4 root root 0 Jan 1 1970 .
drwxr-xr-x 4 root root 0 Jan 1 1970 ..
drwxr-xr-x 2 root root 0 Jan 1 1970 qt510
drwxr-xr-x 2 root root 0 Jan 1 1970 spidev
bash-3.00#
Am I missing something?
TIA,
llandre
DAVE Electronics System House - R&D Department
web: http://www.dave-tech.it
email: r&[EMAIL PROTECTED]
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