i2c-i801: Let i2c-mux-gpio find the GPIO chip

Now that i2c-mux-gpio is able to find the GPIO chip by itself, we can
delegate this task. The great thing here is that i2c-mux-gpio can
defer device probing until the gpio chip is available, so we no longer
depend on the module loading order.

Signed-off-by: Jean Delvare <khali@linux-fr.org>

1 files changed, 4 insertions, 33 deletions

diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
index bb1d7291cf21..37793156bd93 100644
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -194,7 +194,6 @@ struct i801_priv {
 
 #if defined CONFIG_I2C_MUX || defined CONFIG_I2C_MUX_MODULE
         const struct i801_mux_config *mux_drvdata;
-        unsigned mux_priv[2];
         struct platform_device *mux_pdev;
 #endif
 };
@@ -1008,60 +1007,32 @@ static struct dmi_system_id __devinitdata mux_dmi_table[] = {
         { }
 };
 
-static int __devinit match_gpio_chip_by_label(struct gpio_chip *chip,
-                                              void *data)
-{
-        return !strcmp(chip->label, data);
-}
-
 /* Setup multiplexing if needed */
 static int __devinit i801_add_mux(struct i801_priv *priv)
 {
         struct device *dev = &priv->adapter.dev;
         const struct i801_mux_config *mux_config;
-        struct gpio_chip *gpio;
         struct i2c_mux_gpio_platform_data gpio_data;
-        int i, err;
+        int err;
 
         if (!priv->mux_drvdata)
                 return 0;
         mux_config = priv->mux_drvdata;
 
-        /* Find GPIO chip */
-        gpio = gpiochip_find(mux_config->gpio_chip, match_gpio_chip_by_label);
-        if (gpio) {
-                dev_info(dev,
-                         "GPIO chip %s found, SMBus multiplexing enabled\n",
-                         mux_config->gpio_chip);
-        } else {
-                dev_err(dev,
-                        "GPIO chip %s not found, SMBus multiplexing disabled\n",
-                        mux_config->gpio_chip);
-                return -ENODEV;
-        }
-
-        /* Find absolute GPIO pin numbers */
-        if (ARRAY_SIZE(priv->mux_priv) < mux_config->n_gpios) {
-                dev_err(dev, "i801_priv.mux_priv too small (%zu, need %d)\n",
-                        ARRAY_SIZE(priv->mux_priv), mux_config->n_gpios);
-                return -ENODEV;
-        }
-        for (i = 0; i < mux_config->n_gpios; i++)
-                priv->mux_priv[i] = gpio->base + mux_config->gpios[i];
-
         /* Prepare the platform data */
         memset(&gpio_data, 0, sizeof(struct i2c_mux_gpio_platform_data));
         gpio_data.parent = priv->adapter.nr;
         gpio_data.values = mux_config->values;
         gpio_data.n_values = mux_config->n_values;
         gpio_data.classes = mux_config->classes;
-        gpio_data.gpios = priv->mux_priv;
+        gpio_data.gpio_chip = mux_config->gpio_chip;
+        gpio_data.gpios = mux_config->gpios;
         gpio_data.n_gpios = mux_config->n_gpios;
         gpio_data.idle = I2C_MUX_GPIO_NO_IDLE;
 
         /* Register the mux device */
         priv->mux_pdev = platform_device_register_data(dev, "i2c-mux-gpio",
-                                priv->mux_priv[0], &gpio_data,
+                                PLATFORM_DEVID_AUTO, &gpio_data,
                                 sizeof(struct i2c_mux_gpio_platform_data));
         if (IS_ERR(priv->mux_pdev)) {
                 err = PTR_ERR(priv->mux_pdev);