If the gpio controller supports it and the gpio lines are concentrated
to one gpio chip, the mux controller pins will get updated simultaneously.
Signed-off-by: Peter Rosin <peda@xxxxxxxxxx>
---
drivers/i2c/muxes/i2c-mux-gpio.c | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)
diff --git a/drivers/i2c/muxes/i2c-mux-gpio.c b/drivers/i2c/muxes/i2c-mux-gpio.c
index 74a41b9228e3..bedbc88dbecb 100644
--- a/drivers/i2c/muxes/i2c-mux-gpio.c
+++ b/drivers/i2c/muxes/i2c-mux-gpio.c
@@ -23,15 +23,18 @@ struct gpiomux {
unsigned gpio_base;
struct mutex locked_lock;
int locked;
+ struct gpio_desc **gpios;
};
static void i2c_mux_gpio_set(const struct gpiomux *mux, unsigned val)
{
+ int values[mux->data.n_gpios];
int i;
for (i = 0; i < mux->data.n_gpios; i++)
- gpio_set_value_cansleep(mux->gpio_base + mux->data.gpios[i],
- val & (1 << i));
+ values[i] = (val >> i) & 1;
+
+ gpiod_set_array_value_cansleep(mux->data.n_gpios, mux->gpios, values);
}
static int i2c_mux_gpio_select(struct i2c_mux_core *muxc, u32 chan)
@@ -241,12 +244,14 @@ static int i2c_mux_gpio_probe(struct platform_device *pdev)
if (!parent)
return -EPROBE_DEFER;
- muxc = i2c_mux_alloc(parent, &pdev->dev, mux->data.n_values, 0, 0,
+ muxc = i2c_mux_alloc(parent, &pdev->dev, mux->data.n_values,
+ mux->data.n_values * sizeof(*mux->gpios), 0,
i2c_mux_gpio_select, NULL);
if (!muxc) {
ret = -ENOMEM;
goto alloc_failed;
}
+ mux->gpios = muxc->priv;
muxc->priv = mux;
platform_set_drvdata(pdev, muxc);
@@ -284,10 +289,12 @@ static int i2c_mux_gpio_probe(struct platform_device *pdev)
goto err_request_gpio;
}
+ gpio_desc = gpio_to_desc(gpio_base + mux->data.gpios[i]);
+ mux->gpios[i] = gpio_desc;
+
if (!muxc->mux_locked)
continue;
- gpio_desc = gpio_to_desc(gpio_base + mux->data.gpios[i]);
gpio_dev = &gpio_desc->gdev->dev;
muxc->mux_locked = i2c_root_adapter(gpio_dev) == root;
}
--
2.1.4
--
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