On 31/03/2020 14:39, Dmitry Osipenko wrote:
> 31.03.2020 13:33, Jon Hunter пишет:
>> 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>
>> ---
>> drivers/soc/tegra/fuse/fuse-tegra.c | 51 ++++++++++++++++++++++++++
>> 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, 76 insertions(+)
>>
>> diff --git a/drivers/soc/tegra/fuse/fuse-tegra.c b/drivers/soc/tegra/fuse/fuse-tegra.c
>> index 802717b9f6a3..639734dca5df 100644
>> --- a/drivers/soc/tegra/fuse/fuse-tegra.c
>> +++ b/drivers/soc/tegra/fuse/fuse-tegra.c
>> @@ -300,6 +300,56 @@ static void tegra_enable_fuse_clk(void __iomem *base)
>> writel(reg, base + 0x14);
>> }
>>
>> +static ssize_t tegra_soc_majorrev_show(struct device *dev,
>> + struct device_attribute *attr,
>> + char *buf)
>> +{
>> + return sprintf(buf, "%d\n", tegra_get_major_rev());
>> +}
>> +
>> +static DEVICE_ATTR(majorrev, S_IRUGO, tegra_soc_majorrev_show, NULL);
>> +
>> +static ssize_t tegra_soc_minorrev_show(struct device *dev,
>> + struct device_attribute *attr,
>> + char *buf)
>> +{
>> + return sprintf(buf, "%d\n", tegra_get_minor_rev());
>> +}
>> +
>> +static DEVICE_ATTR(minorrev, S_IRUGO, tegra_soc_minorrev_show, NULL);
>
> Checkpatch should give a warning about that permission isn't in octal
> format, please don't ignore it.
Indeed. Will fix. I thought I had ran this previously, obviously not.
Jon
--
nvpublic
