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author | Bartosz Golaszewski <bgolaszewski@baylibre.com> | 2018-08-07 12:07:43 +0200 |
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committer | Bartosz Golaszewski <bgolaszewski@baylibre.com> | 2019-02-14 09:32:19 +0100 |
commit | 4fa882c9f628b312d697cfcefaa6e973ce8ece3e (patch) | |
tree | 50c932ab80bac007485dad0096db99d4406ac4c5 /drivers/misc | |
parent | Merge branch 'v5.1/eeprom-for-bartosz' of git://git.kernel.org/pub/scm/linux/... (diff) | |
download | linux-4fa882c9f628b312d697cfcefaa6e973ce8ece3e.tar.xz linux-4fa882c9f628b312d697cfcefaa6e973ce8ece3e.zip |
eeprom: at24: remove at24_platform_data
There are no more users of at24_platform_data. Remove the relevant
header and modify the driver code to not use it anymore.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Diffstat (limited to 'drivers/misc')
-rw-r--r-- | drivers/misc/eeprom/at24.c | 162 |
1 files changed, 75 insertions, 87 deletions
diff --git a/drivers/misc/eeprom/at24.c b/drivers/misc/eeprom/at24.c index ddfcf4ade7bf..b806a403ca46 100644 --- a/drivers/misc/eeprom/at24.c +++ b/drivers/misc/eeprom/at24.c @@ -22,10 +22,24 @@ #include <linux/i2c.h> #include <linux/nvmem-provider.h> #include <linux/regmap.h> -#include <linux/platform_data/at24.h> #include <linux/pm_runtime.h> #include <linux/gpio/consumer.h> +/* Address pointer is 16 bit. */ +#define AT24_FLAG_ADDR16 BIT(7) +/* sysfs-entry will be read-only. */ +#define AT24_FLAG_READONLY BIT(6) +/* sysfs-entry will be world-readable. */ +#define AT24_FLAG_IRUGO BIT(5) +/* Take always 8 addresses (24c00). */ +#define AT24_FLAG_TAKE8ADDR BIT(4) +/* Factory-programmed serial number. */ +#define AT24_FLAG_SERIAL BIT(3) +/* Factory-programmed mac address. */ +#define AT24_FLAG_MAC BIT(2) +/* Does not auto-rollover reads to the next slave address. */ +#define AT24_FLAG_NO_RDROL BIT(1) + /* * I2C EEPROMs from most vendors are inexpensive and mostly interchangeable. * Differences between different vendor product lines (like Atmel AT24C or @@ -107,10 +121,6 @@ module_param_named(write_timeout, at24_write_timeout, uint, 0); MODULE_PARM_DESC(at24_write_timeout, "Time (in ms) to try writes (default 25)"); struct at24_chip_data { - /* - * these fields mirror their equivalents in - * struct at24_platform_data - */ u32 byte_len; u8 flags; }; @@ -471,63 +481,11 @@ static int at24_write(void *priv, unsigned int off, void *val, size_t count) return 0; } -static void at24_properties_to_pdata(struct device *dev, - struct at24_platform_data *chip) -{ - int err; - u32 val; - - if (device_property_present(dev, "read-only")) - chip->flags |= AT24_FLAG_READONLY; - if (device_property_present(dev, "no-read-rollover")) - chip->flags |= AT24_FLAG_NO_RDROL; - - err = device_property_read_u32(dev, "address-width", &val); - if (!err) { - switch (val) { - case 8: - if (chip->flags & AT24_FLAG_ADDR16) - dev_warn(dev, "Override address width to be 8, while default is 16\n"); - chip->flags &= ~AT24_FLAG_ADDR16; - break; - case 16: - chip->flags |= AT24_FLAG_ADDR16; - break; - default: - dev_warn(dev, "Bad \"address-width\" property: %u\n", - val); - } - } - - err = device_property_read_u32(dev, "size", &val); - if (!err) - chip->byte_len = val; - - err = device_property_read_u32(dev, "pagesize", &val); - if (!err) { - chip->page_size = val; - } else { - /* - * This is slow, but we can't know all eeproms, so we better - * play safe. Specifying custom eeprom-types via platform_data - * is recommended anyhow. - */ - chip->page_size = 1; - } -} - -static int at24_get_pdata(struct device *dev, struct at24_platform_data *pdata) +static const struct at24_chip_data *at24_get_chip_data(struct device *dev) { 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)); @@ -544,13 +502,9 @@ static int at24_get_pdata(struct device *dev, struct at24_platform_data *pdata) cdata = acpi_device_get_match_data(dev); if (!cdata) - return -ENODEV; + return ERR_PTR(-ENODEV); - pdata->byte_len = cdata->byte_len; - pdata->flags = cdata->flags; - at24_properties_to_pdata(dev, pdata); - - return 0; + return cdata; } static void at24_remove_dummy_clients(struct at24_data *at24) @@ -619,7 +573,8 @@ static int at24_probe(struct i2c_client *client) { struct regmap_config regmap_config = { }; struct nvmem_config nvmem_config = { }; - struct at24_platform_data pdata = { }; + u32 byte_len, page_size, flags, addrw; + const struct at24_chip_data *cdata; struct device *dev = &client->dev; bool i2c_fn_i2c, i2c_fn_block; unsigned int i, num_addresses; @@ -634,35 +589,72 @@ static int at24_probe(struct i2c_client *client) i2c_fn_block = i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WRITE_I2C_BLOCK); - err = at24_get_pdata(dev, &pdata); + cdata = at24_get_chip_data(dev); + if (IS_ERR(cdata)) + return PTR_ERR(cdata); + + err = device_property_read_u32(dev, "pagesize", &page_size); if (err) - return err; + /* + * This is slow, but we can't know all eeproms, so we better + * play safe. Specifying custom eeprom-types via platform_data + * is recommended anyhow. + */ + page_size = 1; + + flags = cdata->flags; + if (device_property_present(dev, "read-only")) + flags |= AT24_FLAG_READONLY; + if (device_property_present(dev, "no-read-rollover")) + flags |= AT24_FLAG_NO_RDROL; + + err = device_property_read_u32(dev, "address-width", &addrw); + if (!err) { + switch (addrw) { + case 8: + if (flags & AT24_FLAG_ADDR16) + dev_warn(dev, + "Override address width to be 8, while default is 16\n"); + flags &= ~AT24_FLAG_ADDR16; + break; + case 16: + flags |= AT24_FLAG_ADDR16; + break; + default: + dev_warn(dev, "Bad \"address-width\" property: %u\n", + addrw); + } + } + + err = device_property_read_u32(dev, "size", &byte_len); + if (err) + byte_len = cdata->byte_len; if (!i2c_fn_i2c && !i2c_fn_block) - pdata.page_size = 1; + page_size = 1; - if (!pdata.page_size) { + if (!page_size) { dev_err(dev, "page_size must not be 0!\n"); return -EINVAL; } - if (!is_power_of_2(pdata.page_size)) + if (!is_power_of_2(page_size)) dev_warn(dev, "page_size looks suspicious (no power of 2)!\n"); - if (pdata.flags & AT24_FLAG_TAKE8ADDR) + if (flags & AT24_FLAG_TAKE8ADDR) num_addresses = 8; else - num_addresses = DIV_ROUND_UP(pdata.byte_len, - (pdata.flags & AT24_FLAG_ADDR16) ? 65536 : 256); + num_addresses = DIV_ROUND_UP(byte_len, + (flags & AT24_FLAG_ADDR16) ? 65536 : 256); - if ((pdata.flags & AT24_FLAG_SERIAL) && (pdata.flags & AT24_FLAG_MAC)) { + if ((flags & AT24_FLAG_SERIAL) && (flags & AT24_FLAG_MAC)) { dev_err(dev, "invalid device data - cannot have both AT24_FLAG_SERIAL & AT24_FLAG_MAC."); return -EINVAL; } regmap_config.val_bits = 8; - regmap_config.reg_bits = (pdata.flags & AT24_FLAG_ADDR16) ? 16 : 8; + regmap_config.reg_bits = (flags & AT24_FLAG_ADDR16) ? 16 : 8; regmap_config.disable_locking = true; regmap = devm_regmap_init_i2c(client, ®map_config); @@ -675,11 +667,11 @@ static int at24_probe(struct i2c_client *client) return -ENOMEM; mutex_init(&at24->lock); - at24->byte_len = pdata.byte_len; - at24->page_size = pdata.page_size; - at24->flags = pdata.flags; + at24->byte_len = byte_len; + at24->page_size = page_size; + at24->flags = flags; at24->num_addresses = num_addresses; - at24->offset_adj = at24_get_offset_adj(pdata.flags, pdata.byte_len); + at24->offset_adj = at24_get_offset_adj(flags, byte_len); at24->client[0].client = client; at24->client[0].regmap = regmap; @@ -687,10 +679,10 @@ static int at24_probe(struct i2c_client *client) if (IS_ERR(at24->wp_gpio)) return PTR_ERR(at24->wp_gpio); - writable = !(pdata.flags & AT24_FLAG_READONLY); + writable = !(flags & AT24_FLAG_READONLY); if (writable) { at24->write_max = min_t(unsigned int, - pdata.page_size, at24_io_limit); + page_size, at24_io_limit); if (!i2c_fn_i2c && at24->write_max > I2C_SMBUS_BLOCK_MAX) at24->write_max = I2C_SMBUS_BLOCK_MAX; } @@ -733,7 +725,7 @@ static int at24_probe(struct i2c_client *client) nvmem_config.priv = at24; nvmem_config.stride = 1; nvmem_config.word_size = 1; - nvmem_config.size = pdata.byte_len; + nvmem_config.size = byte_len; at24->nvmem = devm_nvmem_register(dev, &nvmem_config); if (IS_ERR(at24->nvmem)) { @@ -742,13 +734,9 @@ static int at24_probe(struct i2c_client *client) } dev_info(dev, "%u byte %s EEPROM, %s, %u bytes/write\n", - pdata.byte_len, client->name, + byte_len, client->name, writable ? "writable" : "read-only", at24->write_max); - /* export data to kernel code */ - if (pdata.setup) - pdata.setup(at24->nvmem, pdata.context); - return 0; err_clients: |