From mboxrd@z Thu Jan 1 00:00:00 1970 From: llandre Subject: Protocol driver probe function never invoked Date: Mon, 23 Jul 2007 10:54:34 +0200 Message-ID: <46A46CCA.7010303@dave-tech.it> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: spi-devel-general-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: spi-devel-general-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-spi.vger.kernel.org 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&d2-4VKA1VU3ct/j+vYz1yj4TQ@public.gmane.org ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/