diff options
| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2023-03-24 19:49:57 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2023-03-29 17:30:19 +0300 |
| commit | c458290702441f2e9eac22001ef52ae82717160a (patch) | |
| tree | 86eb19537ed672fc2d952f88dd59a2fdf7a2021c /drivers/pinctrl | |
| parent | d490be6dd8aa3194d8b5d509846275b4b2b2ac38 (diff) | |
| download | linux-c458290702441f2e9eac22001ef52ae82717160a.tar.xz | |
pinctrl: mcp23s08: Implement gpio bulk functions
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>
Diffstat (limited to 'drivers/pinctrl')
| -rw-r--r-- | drivers/pinctrl/pinctrl-mcp23s08.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/pinctrl/pinctrl-mcp23s08.c b/drivers/pinctrl/pinctrl-mcp23s08.c index 79a41d418482..8ec7f2a3d009 100644 --- a/drivers/pinctrl/pinctrl-mcp23s08.c +++ b/drivers/pinctrl/pinctrl-mcp23s08.c @@ -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; |