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pinctrl: mcp23s08: Implement gpio bulk functions

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To speed up some usecases implement reading and writing several IO lines
at once.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20230324164957.485924-3-u.kleine-koenig@pengutronix.de
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Uwe Kleine-König 2023-03-24 17:49:57 +01:00 committed by Linus Walleij
parent d490be6dd8
commit c458290702
1 changed files with 34 additions and 0 deletions
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34
drivers/pinctrl/pinctrl-mcp23s08.c
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@ -307,6 +307,28 @@ static int mcp23s08_get(struct gpio_chip *chip, unsigned offset)
return status;
}
static int mcp23s08_get_multiple(struct gpio_chip *chip,
unsigned long *mask, unsigned long *bits)
{
struct mcp23s08 *mcp = gpiochip_get_data(chip);
unsigned int status;
int ret;
mutex_lock(&mcp->lock);
/* REVISIT reading this clears any IRQ ... */
ret = mcp_read(mcp, MCP_GPIO, &status);
if (ret < 0)
status = 0;
else {
mcp->cached_gpio = status;
*bits = status;
}
mutex_unlock(&mcp->lock);
return ret;
}
static int __mcp23s08_set(struct mcp23s08 *mcp, unsigned mask, bool value)
{
return mcp_update_bits(mcp, MCP_OLAT, mask, value ? mask : 0);
@ -322,6 +344,16 @@ static void mcp23s08_set(struct gpio_chip *chip, unsigned offset, int value)
mutex_unlock(&mcp->lock);
}
static void mcp23s08_set_multiple(struct gpio_chip *chip,
unsigned long *mask, unsigned long *bits)
{
struct mcp23s08 *mcp = gpiochip_get_data(chip);
mutex_lock(&mcp->lock);
mcp_update_bits(mcp, MCP_OLAT, *mask, *bits);
mutex_unlock(&mcp->lock);
}
static int
mcp23s08_direction_output(struct gpio_chip *chip, unsigned offset, int value)
{
@ -546,8 +578,10 @@ int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev,
mcp->chip.direction_input = mcp23s08_direction_input;
mcp->chip.get = mcp23s08_get;
mcp->chip.get_multiple = mcp23s08_get_multiple;
mcp->chip.direction_output = mcp23s08_direction_output;
mcp->chip.set = mcp23s08_set;
mcp->chip.set_multiple = mcp23s08_set_multiple;
mcp->chip.base = base;
mcp->chip.can_sleep = true;