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gpio: davinci: restore a way to manually specify the GPIO base 

Commit 587f7a694f ("gpio: davinci: Use dev name for label and
automatic base selection") broke the network support in legacy boot
mode for da850-evm since we can no longer request the MDIO clock GPIO.

Other boards may be broken too, which I haven't tested.

The problem is in the fact that most board files still use the legacy
GPIO API where lines are requested by numbers rather than descriptors.

While this should be fixed eventually, in order to unbreak the board
for now - provide a way to manually specify the GPIO base in platform
data.

Fixes: 587f7a694f ("gpio: davinci: Use dev name for label and automatic base selection")
Cc: stable@vger.kernel.org
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
This commit is contained in:
Bartosz Golaszewski 2018-11-21 10:35:17 +01:00 committed by Sekhar Nori
parent adcf60ce14
commit 786a9ab133
2 changed files with 3 additions and 1 deletions
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2
drivers/gpio/gpio-davinci.c
View File

@ -258,7 +258,7 @@ static int davinci_gpio_probe(struct platform_device *pdev)
chips->chip.set = davinci_gpio_set;
chips->chip.ngpio = ngpio;
chips->chip.base = -1;
chips->chip.base = pdata->no_auto_base ? pdata->base : -1;
#ifdef CONFIG_OF_GPIO
chips->chip.of_gpio_n_cells = 2;

2
include/linux/platform_data/gpio-davinci.h
View File

@ -17,6 +17,8 @@
#define __DAVINCI_GPIO_PLATFORM_H
struct davinci_gpio_platform_data {
bool no_auto_base;
u32 base;
u32 ngpio;
u32 gpio_unbanked;
};