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Merge branch 'i2c-mux/for-next' of https://github.com/peda-r/i2c-mux into i2c/for-5.3

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I realize that there are changes in drivers/i2c/busses/i2c-i801.c that strictly
speaking don't belong here, but I hope you don't mind. These changes are all
about the interaction with the i2c-mux-gpio code, and I did a test-merge a few
days ago w/o conflicts.

Anyway, the GPIO-work from Linus Walleij (with help from Serge Semin) in the
i2c-mux-gpio and i2c-arb-gpio-challenge drivers is the main feature.
This commit is contained in:
Wolfram Sang
2019-06-29 13:02:48 +02:00
parent 504ee6b306 05af076570
commit 45c9cc681d
7 changed files with 92 additions and 158 deletions
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37
drivers/i2c/busses/i2c-i801.c
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@@ -109,7 +109,7 @@
#include <linux/pm_runtime.h>
#if IS_ENABLED(CONFIG_I2C_MUX_GPIO) && defined CONFIG_DMI
#include <linux/gpio.h>
#include <linux/gpio/machine.h>
#include <linux/platform_data/i2c-mux-gpio.h>
#endif
@@ -278,6 +278,7 @@ struct i801_priv {
#if IS_ENABLED(CONFIG_I2C_MUX_GPIO) && defined CONFIG_DMI
const struct i801_mux_config *mux_drvdata;
struct platform_device *mux_pdev;
struct gpiod_lookup_table *lookup;
#endif
struct platform_device *tco_pdev;
@@ -1406,7 +1407,8 @@ static int i801_add_mux(struct i801_priv *priv)
struct device *dev = &priv->adapter.dev;
const struct i801_mux_config *mux_config;
struct i2c_mux_gpio_platform_data gpio_data;
int err;
struct gpiod_lookup_table *lookup;
int err, i;
if (!priv->mux_drvdata)
return 0;
@@ -1418,17 +1420,36 @@ static int i801_add_mux(struct i801_priv *priv)
gpio_data.values = mux_config->values;
gpio_data.n_values = mux_config->n_values;
gpio_data.classes = mux_config->classes;
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 */
/* Register GPIO descriptor lookup table */
lookup = devm_kzalloc(dev,
struct_size(lookup, table, mux_config->n_gpios),
GFP_KERNEL);
if (!lookup)
return -ENOMEM;
lookup->dev_id = "i2c-mux-gpio";
for (i = 0; i < mux_config->n_gpios; i++) {
lookup->table[i].chip_label = mux_config->gpio_chip;
lookup->table[i].chip_hwnum = mux_config->gpios[i];
lookup->table[i].con_id = "mux";
}
gpiod_add_lookup_table(lookup);
priv->lookup = lookup;
/*
* Register the mux device, we use PLATFORM_DEVID_NONE here
* because since we are referring to the GPIO chip by name we are
* anyways in deep trouble if there is more than one of these
* devices, and there should likely only be one platform controller
* hub.
*/
priv->mux_pdev = platform_device_register_data(dev, "i2c-mux-gpio",
PLATFORM_DEVID_AUTO, &gpio_data,
PLATFORM_DEVID_NONE, &gpio_data,
sizeof(struct i2c_mux_gpio_platform_data));
if (IS_ERR(priv->mux_pdev)) {
err = PTR_ERR(priv->mux_pdev);
gpiod_remove_lookup_table(lookup);
priv->mux_pdev = NULL;
dev_err(dev, "Failed to register i2c-mux-gpio device\n");
return err;
@@ -1441,6 +1462,8 @@ static void i801_del_mux(struct i801_priv *priv)
{
if (priv->mux_pdev)
platform_device_unregister(priv->mux_pdev);
if (priv->lookup)
gpiod_remove_lookup_table(priv->lookup);
}
static unsigned int i801_get_adapter_class(struct i801_priv *priv)