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gpio fixes for v6.19-rc6

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- implement the missing .get_direction() callback for gpio-davinci
 - remove redundant check in GPIO core which can also propagate an
   invalid errno to user-space
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Merge tag 'gpio-fixes-for-v6.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux

Pull gpio fixes from Bartosz Golaszewski:
 "Two more GPIO fixes addressing an issue uncovered by the shared GPIO
  management changes in v6.19:

   - implement the missing .get_direction() callback for gpio-davinci

   - remove redundant check in GPIO core which can also propagate an
     invalid errno to user-space"

* tag 'gpio-fixes-for-v6.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
  gpiolib: remove redundant callback check
  gpio: davinci: implement .get_direction()
This commit is contained in:
Linus Torvalds 2026-01-16 09:55:09 -08:00
commit c2a44a02d7
2 changed files with 18 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
drivers/gpio/gpio-davinci.c
View File

@ -6,6 +6,7 @@
* Copyright (c) 2007, MontaVista Software, Inc. <source@mvista.com>
*/
#include <linux/cleanup.h>
#include <linux/gpio/driver.h>
#include <linux/errno.h>
#include <linux/kernel.h>
@ -109,6 +110,22 @@ davinci_direction_out(struct gpio_chip *chip, unsigned offset, int value)
return __davinci_direction(chip, offset, true, value);
}
static int davinci_get_direction(struct gpio_chip *chip, unsigned int offset)
{
struct davinci_gpio_controller *d = gpiochip_get_data(chip);
struct davinci_gpio_regs __iomem *g;
u32 mask = __gpio_mask(offset), val;
int bank = offset / 32;
g = d->regs[bank];
guard(spinlock_irqsave)(&d->lock);
val = readl_relaxed(&g->dir);
return (val & mask) ? GPIO_LINE_DIRECTION_IN : GPIO_LINE_DIRECTION_OUT;
}
/*
* Read the pin's value (works even if it's set up as output);
* returns zero/nonzero.
@ -203,6 +220,7 @@ static int davinci_gpio_probe(struct platform_device *pdev)
chips->chip.get = davinci_gpio_get;
chips->chip.direction_output = davinci_direction_out;
chips->chip.set = davinci_gpio_set;
chips->chip.get_direction = davinci_get_direction;
chips->chip.ngpio = ngpio;
chips->chip.base = -1;

3
drivers/gpio/gpiolib.c
View File

@ -468,9 +468,6 @@ int gpiod_get_direction(struct gpio_desc *desc)
test_bit(GPIOD_FLAG_IS_OUT, &flags))
return 0;
if (!guard.gc->get_direction)
return -ENOTSUPP;
ret = gpiochip_get_direction(guard.gc, offset);
if (ret < 0)
return ret;