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eeprom: at24: move platform data processing into a separate routine 

This driver can receive its device data from different sources
depending on the system. Move the entire code processing platform data,
device tree and acpi into a separate function.

Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Tested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Bartosz Golaszewski 2018-03-19 10:17:16 +01:00 committed by Greg Kroah-Hartman
parent 48b6a7d1ee
commit feb2f19b1e
1 changed files with 40 additions and 30 deletions
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70
drivers/misc/eeprom/at24.c
View File

@ -496,6 +496,43 @@ static void at24_properties_to_pdata(struct device *dev,
}
}
static int at24_get_pdata(struct device *dev, struct at24_platform_data *pdata)
{
struct device_node *of_node = dev->of_node;
const struct at24_chip_data *cdata;
const struct i2c_device_id *id;
struct at24_platform_data *pd;
pd = dev_get_platdata(dev);
if (pd) {
memcpy(pdata, pd, sizeof(*pdata));
return 0;
}
id = i2c_match_id(at24_ids, to_i2c_client(dev));
/*
* The I2C core allows OF nodes compatibles to match against the
* I2C device ID table as a fallback, so check not only if an OF
* node is present but also if it matches an OF device ID entry.
*/
if (of_node && of_match_device(at24_of_match, dev))
cdata = of_device_get_match_data(dev);
else if (id)
cdata = (void *)&id->driver_data;
else
cdata = acpi_device_get_match_data(dev);
if (!cdata)
return -ENODEV;
pdata->byte_len = cdata->byte_len;
pdata->flags = cdata->flags;
at24_properties_to_pdata(dev, pdata);
return 0;
}
static unsigned int at24_get_offset_adj(u8 flags, unsigned int byte_len)
{
if (flags & AT24_FLAG_MAC) {
@ -523,10 +560,8 @@ static int at24_probe(struct i2c_client *client)
{
struct regmap_config regmap_config = { };
struct nvmem_config nvmem_config = { };
const struct at24_chip_data *cd = NULL;
struct at24_platform_data pdata = { };
struct device *dev = &client->dev;
const struct i2c_device_id *id;
unsigned int i, num_addresses;
struct at24_data *at24;
size_t at24_size;
@ -534,34 +569,9 @@ static int at24_probe(struct i2c_client *client)
u8 test_byte;
int err;
id = i2c_match_id(at24_ids, client);
if (dev->platform_data) {
pdata = *(struct at24_platform_data *)dev->platform_data;
} else {
/*
* The I2C core allows OF nodes compatibles to match against the
* I2C device ID table as a fallback, so check not only if an OF
* node is present but also if it matches an OF device ID entry.
*/
if (dev->of_node && of_match_device(at24_of_match, dev)) {
cd = of_device_get_match_data(dev);
} else if (id) {
cd = (void *)id->driver_data;
} else {
const struct acpi_device_id *aid;
aid = acpi_match_device(at24_acpi_ids, dev);
if (aid)
cd = (void *)aid->driver_data;
}
if (!cd)
return -ENODEV;
pdata.byte_len = cd->byte_len;
pdata.flags = cd->flags;
at24_properties_to_pdata(dev, &pdata);
}
err = at24_get_pdata(dev, &pdata);
if (err)
return err;
if (!pdata.page_size) {
dev_err(dev, "page_size must not be 0!\n");