mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 07:35:20 +07:00
fdb7e884ad
The IOP3xx has some elaborate code to directly slam the GPIO lines multiplexed with I2C down low before enablement, apparently a workaround for a hardware bug found in the early chips. After consulting the developer documentation for IOP80321 and IOP80331 I can clearly see that this may be useful for IOP80321 family (mach-iop32x) but it is highly dubious for any 80331 series or later chip: in these chips the lines are not multiplexed for UARTs. We convert the code to pass optional GPIO descriptors and register these only on the 80321-based boards where it makes sense, optionally obtain them in the driver and use the gpiod_set_raw_value() to ascertain the line gets driven low when needed. The GPIO driver does not give the GPIO chip a reasonable label so the patch also adds that so that these machine descriptor tables can be used. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de> |
||
|---|---|---|
| .. | ||
| cache-b15-rac.h | ||
| cache-feroceon-l2.h | ||
| cache-l2x0.h | ||
| cache-tauros2.h | ||
| cache-uniphier.h | ||
| cp14.h | ||
| dec21285.h | ||
| entry-macro-iomd.S | ||
| ioc.h | ||
| iomd.h | ||
| iop3xx-adma.h | ||
| iop3xx.h | ||
| iop_adma.h | ||
| it8152.h | ||
| locomo.h | ||
| memc.h | ||
| sa1111.h | ||
| scoop.h | ||
| ssp.h | ||