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| Filename | Latest commit message | Latest commit date |
|---|---|---|
3091141d78
I noticed in its DSDT that one of my tablets actually is using the GPADC pin for temperature monitoring. The whole axp288_adc_set_ts() function is a bit weird, in the past it was removed because it seems to make no sense, then this was reverted because of regressions. So I decided to test the special GPADC pin handling on this tablet. Conclusion: not only is axp288_adc_set_ts() necessary, we need to sleep a bit after making the AXP288_ADC_TS_PIN_CTRL changes before sampling the GPADC, otherwise it will often (about 80% of the time) read 0 instead of its actual value. It seems that there is only 1 bias current source and to be able to use it for the GPIO0 pin in GPADC mode it must be temporarily turned off for the TS pin, but the datasheet does not mention this. This commit adds a sleep after disabling the TS pin bias current, fixing the GPADC more often then not wrongly returning 0. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.