On Fri, Apr 17, 2020 at 01:39:48PM +0100, Jon Hunter wrote: > Add a custom SoC attribute for Tegra to expose the HIDREV register > fields to userspace via the sysfs. This register provides additional > details about the type of device (eg, silicon, FPGA, etc) as well as > revision. Exposing this information is useful for identifying the > exact device revision and device type. > > For Tegra devices up until Tegra186, the majorrev and minorrev fields of > the HIDREV register are used to determine the device revision and device > type. For Tegra194, the majorrev and minorrev fields only determine the > revision. Starting with Tegra194, there is an additional field, > pre_si_platform (which occupies bits 20-23), that now determines device > type. Therefore, for all Tegra devices, add a custom SoC attribute for > the majorrev and minorrev fields and for Tegra194 add an additional > attribute for the pre_si_platform field. > > Signed-off-by: Jon Hunter <jonathanh@xxxxxxxxxx> > --- > Changes since V2: > - Renamed attributes > - Fix checkpatch warnings > - Simplified code by using DEVICE_ATTR_RO > > Changes since V1: > - Exported individual fields of the HIDREV register > > drivers/soc/tegra/fuse/fuse-tegra.c | 54 ++++++++++++++++++++++++++ > drivers/soc/tegra/fuse/fuse-tegra20.c | 1 + > drivers/soc/tegra/fuse/fuse-tegra30.c | 6 +++ > drivers/soc/tegra/fuse/fuse.h | 8 ++++ > drivers/soc/tegra/fuse/tegra-apbmisc.c | 10 +++++ > 5 files changed, 79 insertions(+) Applied, thanks. Thierry
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