Hello, Short version: This patch series is the SPI equivalent of the I2C one posted before [0]. This series add the missing MODULE_DEVICE_TABLE() for OF and SPI tables to export that information so modules have the correct aliases built-in and autoloading works correctly. Longer version: The SPI core always reports the MODALIAS uevent as "spi:<modalias>" regardless of the mechanism that was used to register the device (i.e: OF or board code) and the table that is used later to match the driver with the device (i.e: SPI id table or OF match table). But this means that OF-only drivers needs to have both OF and SPI id tables that have to be kept in sync and also the device node's compatible manufacturer prefix is stripped when reporting the MODALIAS. Which can lead to issues if two vendors use the same SPI device name for example. Also, there are many SPI drivers whose module auto-loading is not working because of this fact that the SPI core always reports the MODALIAS as spi:<modalias> and many developers didn't expect this since is not how other subsystems behave. I've identified SPI drivers with 3 types of different issues: a) Those that have an spi_table but are not exported. The match works if the driver is built-in but since the ID table is not exported, module auto-load won't work. b) Those that have a of_table but are not exported. This is currently not an issue since even when the of_table is used to match the dev with the driver, an OF modalias is not reported by the SPI core. But if the SPI core is changed to report the MODALIAS of the form of:N*T*C as it's made by other subsystems, then module auto-load will break for these drivers. c) Those that don't have an of_table but should since are OF drivers with DT bindings doc for them. Since the SPI core does not report a OF modalias and since spi_match_device() fallbacks to match the device part of the compatible string with the SPI device ID table, many OF drivers don't have an of_table to match. After all having a SPI device ID table is mandatory so it works without a of_table. So, in order to not make mandatory to have a SPI device ID table, all these three kind of issues have to be addressed. This series does that. I split the changes so the patches in this series are independent and can be picked individually by subsystem maintainers. Patches #1 and #2 solves a), patches #3 to #8 solves b) and patches Patch #18 changes the logic of spi_uevent() to report an OF modalias if the device was registered using OF. But this patch is included in the series only as an RFC for illustration purposes since changing that without first applying all the other patches in this series, will break module autoloading for the drivers of devices registered using OF but that lacks an of_match_table. I'll repost patch #18 once all the patches in this series have landed. [0]: https://lkml.org/lkml/2015/7/30/519 Best regards, Javier Javier Martinez Canillas (18): iio: Export SPI module alias information in missing drivers staging: iio: hmc5843: Export missing SPI module alias information mtd: dataflash: Export OF module alias information OMAPDSS: panel-sony-acx565akm: Export OF module alias information mmc: mmc_spi: Export OF module alias information staging: mt29f_spinand: Export OF module alias information net: ks8851: Export OF module alias information [media] s5c73m3: Export OF module alias information mfd: cros_ec: spi: Add OF match table iio: dac: ad7303: Add OF match table iio: adc: max1027: Set struct spi_driver .of_match_table mfd: stmpe: Add OF match table iio: adc: mcp320x: Set struct spi_driver .of_match_table iio: as3935: Add OF match table iio: adc128s052: Add OF match table iio: frequency: adf4350: Add OF match table NFC: trf7970a: Add OF match table spi: (RFC, don't apply) report OF style modalias when probing using DT drivers/iio/adc/max1027.c | 1 + drivers/iio/adc/mcp320x.c | 1 + drivers/iio/adc/ti-adc128s052.c | 8 ++++++++ drivers/iio/amplifiers/ad8366.c | 1 + drivers/iio/dac/ad7303.c | 7 +++++++ drivers/iio/frequency/adf4350.c | 9 +++++++++ drivers/iio/proximity/as3935.c | 7 +++++++ drivers/media/i2c/s5c73m3/s5c73m3-spi.c | 1 + drivers/mfd/cros_ec_spi.c | 7 +++++++ drivers/mfd/stmpe-spi.c | 13 +++++++++++++ drivers/mmc/host/mmc_spi.c | 1 + drivers/mtd/devices/mtd_dataflash.c | 1 + drivers/net/ethernet/micrel/ks8851.c | 1 + drivers/nfc/trf7970a.c | 7 +++++++ drivers/spi/spi.c | 8 ++++++++ drivers/staging/iio/magnetometer/hmc5843_spi.c | 1 + drivers/staging/mt29f_spinand/mt29f_spinand.c | 1 + .../video/fbdev/omap2/displays-new/panel-sony-acx565akm.c | 1 + 18 files changed, 76 insertions(+) -- 2.4.3 -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
