diff options
| author | Martin Blumenstingl <martin.blumenstingl@googlemail.com> | 2016-03-27 17:43:02 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2016-03-31 11:59:43 +0200 |
| commit | 8fccdb580ebec0f5b081d824797911a4c5d91891 (patch) | |
| tree | 8dcbb3ffe3d247015b1bdd0856267df1eb8b27d2 | |
| parent | 691998fac6f50c9117e279c3fbfa63a23cf7ce2e (diff) | |
| download | op-kernel-dev-8fccdb580ebec0f5b081d824797911a4c5d91891.zip op-kernel-dev-8fccdb580ebec0f5b081d824797911a4c5d91891.tar.gz | |
gpio: gpio-it87: Add support for IT8620 and IT8628
These chips seem to have a 9th GPIO block (thus supporting 72 GPIOs)
which is configured through SuperIO register 0xd2 (output enable) and
0xd3 (simple I/O). This is also the reason why io_size is larger than
on IT8728 / IT8732. Unfortunately I don't have hardware to test this 9th
GPIO block.
I am also not sure about not configuring the Simple I/O registers as the
hardware I have only uses GPIO block 8. Reading back the values of
0xc0-0xc7 (as configured by the BIOS/EFI on my board) shows that all
have 0xff set.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
| -rw-r--r-- | drivers/gpio/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/gpio/gpio-it87.c | 10 |
2 files changed, 11 insertions, 1 deletions
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 7889836..08a93e0 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -558,7 +558,7 @@ config GPIO_IT87 Say yes here to support GPIO functionality of IT87xx Super I/O chips. This driver is tested with ITE IT8728 and IT8732 Super I/O chips, and - supports the IT8761E Super I/O chip as well. + supports the IT8761E, IT8620E and IT8628E Super I/O chip as well. To compile this driver as a module, choose M here: the module will be called gpio_it87 diff --git a/drivers/gpio/gpio-it87.c b/drivers/gpio/gpio-it87.c index b219c82..63a962d 100644 --- a/drivers/gpio/gpio-it87.c +++ b/drivers/gpio/gpio-it87.c @@ -34,6 +34,8 @@ /* Chip Id numbers */ #define NO_DEV_ID 0xffff +#define IT8620_ID 0x8620 +#define IT8628_ID 0x8628 #define IT8728_ID 0x8728 #define IT8732_ID 0x8732 #define IT8761_ID 0x8761 @@ -302,6 +304,14 @@ static int __init it87_gpio_init(void) it87_gpio->chip = it87_template_chip; switch (chip_type) { + case IT8620_ID: + case IT8628_ID: + gpio_ba_reg = 0x62; + it87_gpio->io_size = 11; + it87_gpio->output_base = 0xc8; + it87_gpio->simple_size = 0; + it87_gpio->chip.ngpio = 64; + break; case IT8728_ID: case IT8732_ID: gpio_ba_reg = 0x62; |
