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>hifive-unleashed-5.1
Bartosz Golaszewski
parent
90733530a1
commit
4fa882c9f6
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@ -2503,7 +2503,6 @@ T: git git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux.git
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S: Maintained
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F: Documentation/devicetree/bindings/eeprom/at24.txt
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F: drivers/misc/eeprom/at24.c
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F: include/linux/platform_data/at24.h
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ATA OVER ETHERNET (AOE) DRIVER
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M: "Ed L. Cashin" <ed.cashin@acm.org>
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@ -22,10 +22,24 @@
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#include <linux/i2c.h>
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#include <linux/nvmem-provider.h>
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#include <linux/regmap.h>
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#include <linux/platform_data/at24.h>
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#include <linux/pm_runtime.h>
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#include <linux/gpio/consumer.h>
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/* Address pointer is 16 bit. */
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#define AT24_FLAG_ADDR16 BIT(7)
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/* sysfs-entry will be read-only. */
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#define AT24_FLAG_READONLY BIT(6)
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/* sysfs-entry will be world-readable. */
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#define AT24_FLAG_IRUGO BIT(5)
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/* Take always 8 addresses (24c00). */
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#define AT24_FLAG_TAKE8ADDR BIT(4)
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/* Factory-programmed serial number. */
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#define AT24_FLAG_SERIAL BIT(3)
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/* Factory-programmed mac address. */
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#define AT24_FLAG_MAC BIT(2)
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/* Does not auto-rollover reads to the next slave address. */
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#define AT24_FLAG_NO_RDROL BIT(1)
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/*
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* I2C EEPROMs from most vendors are inexpensive and mostly interchangeable.
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* Differences between different vendor product lines (like Atmel AT24C or
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@ -107,10 +121,6 @@ module_param_named(write_timeout, at24_write_timeout, uint, 0);
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MODULE_PARM_DESC(at24_write_timeout, "Time (in ms) to try writes (default 25)");
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struct at24_chip_data {
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/*
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* these fields mirror their equivalents in
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* struct at24_platform_data
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*/
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u32 byte_len;
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u8 flags;
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};
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@ -471,63 +481,11 @@ static int at24_write(void *priv, unsigned int off, void *val, size_t count)
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return 0;
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}
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static void at24_properties_to_pdata(struct device *dev,
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struct at24_platform_data *chip)
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{
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int err;
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u32 val;
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if (device_property_present(dev, "read-only"))
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chip->flags |= AT24_FLAG_READONLY;
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if (device_property_present(dev, "no-read-rollover"))
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chip->flags |= AT24_FLAG_NO_RDROL;
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err = device_property_read_u32(dev, "address-width", &val);
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if (!err) {
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switch (val) {
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case 8:
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if (chip->flags & AT24_FLAG_ADDR16)
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dev_warn(dev, "Override address width to be 8, while default is 16\n");
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chip->flags &= ~AT24_FLAG_ADDR16;
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break;
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case 16:
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chip->flags |= AT24_FLAG_ADDR16;
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break;
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default:
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dev_warn(dev, "Bad \"address-width\" property: %u\n",
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val);
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}
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}
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err = device_property_read_u32(dev, "size", &val);
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if (!err)
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chip->byte_len = val;
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err = device_property_read_u32(dev, "pagesize", &val);
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if (!err) {
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chip->page_size = val;
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} else {
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/*
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* This is slow, but we can't know all eeproms, so we better
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* play safe. Specifying custom eeprom-types via platform_data
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* is recommended anyhow.
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*/
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chip->page_size = 1;
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}
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}
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static int at24_get_pdata(struct device *dev, struct at24_platform_data *pdata)
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static const struct at24_chip_data *at24_get_chip_data(struct device *dev)
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{
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struct device_node *of_node = dev->of_node;
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const struct at24_chip_data *cdata;
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const struct i2c_device_id *id;
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struct at24_platform_data *pd;
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pd = dev_get_platdata(dev);
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if (pd) {
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memcpy(pdata, pd, sizeof(*pdata));
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return 0;
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}
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id = i2c_match_id(at24_ids, to_i2c_client(dev));
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@ -544,13 +502,9 @@ static int at24_get_pdata(struct device *dev, struct at24_platform_data *pdata)
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cdata = acpi_device_get_match_data(dev);
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if (!cdata)
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return -ENODEV;
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return ERR_PTR(-ENODEV);
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pdata->byte_len = cdata->byte_len;
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pdata->flags = cdata->flags;
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at24_properties_to_pdata(dev, pdata);
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return 0;
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return cdata;
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}
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static void at24_remove_dummy_clients(struct at24_data *at24)
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@ -619,7 +573,8 @@ static int at24_probe(struct i2c_client *client)
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{
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struct regmap_config regmap_config = { };
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struct nvmem_config nvmem_config = { };
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struct at24_platform_data pdata = { };
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u32 byte_len, page_size, flags, addrw;
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const struct at24_chip_data *cdata;
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struct device *dev = &client->dev;
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bool i2c_fn_i2c, i2c_fn_block;
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unsigned int i, num_addresses;
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@ -634,35 +589,72 @@ static int at24_probe(struct i2c_client *client)
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i2c_fn_block = i2c_check_functionality(client->adapter,
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I2C_FUNC_SMBUS_WRITE_I2C_BLOCK);
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err = at24_get_pdata(dev, &pdata);
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cdata = at24_get_chip_data(dev);
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if (IS_ERR(cdata))
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return PTR_ERR(cdata);
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err = device_property_read_u32(dev, "pagesize", &page_size);
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if (err)
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return err;
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/*
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* This is slow, but we can't know all eeproms, so we better
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* play safe. Specifying custom eeprom-types via platform_data
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* is recommended anyhow.
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*/
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page_size = 1;
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flags = cdata->flags;
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if (device_property_present(dev, "read-only"))
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flags |= AT24_FLAG_READONLY;
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if (device_property_present(dev, "no-read-rollover"))
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flags |= AT24_FLAG_NO_RDROL;
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err = device_property_read_u32(dev, "address-width", &addrw);
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if (!err) {
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switch (addrw) {
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case 8:
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if (flags & AT24_FLAG_ADDR16)
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dev_warn(dev,
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"Override address width to be 8, while default is 16\n");
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flags &= ~AT24_FLAG_ADDR16;
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break;
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case 16:
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flags |= AT24_FLAG_ADDR16;
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break;
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default:
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dev_warn(dev, "Bad \"address-width\" property: %u\n",
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addrw);
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}
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}
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err = device_property_read_u32(dev, "size", &byte_len);
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if (err)
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byte_len = cdata->byte_len;
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if (!i2c_fn_i2c && !i2c_fn_block)
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pdata.page_size = 1;
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page_size = 1;
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if (!pdata.page_size) {
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if (!page_size) {
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dev_err(dev, "page_size must not be 0!\n");
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return -EINVAL;
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}
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if (!is_power_of_2(pdata.page_size))
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if (!is_power_of_2(page_size))
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dev_warn(dev, "page_size looks suspicious (no power of 2)!\n");
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if (pdata.flags & AT24_FLAG_TAKE8ADDR)
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if (flags & AT24_FLAG_TAKE8ADDR)
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num_addresses = 8;
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else
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num_addresses = DIV_ROUND_UP(pdata.byte_len,
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(pdata.flags & AT24_FLAG_ADDR16) ? 65536 : 256);
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num_addresses = DIV_ROUND_UP(byte_len,
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(flags & AT24_FLAG_ADDR16) ? 65536 : 256);
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if ((pdata.flags & AT24_FLAG_SERIAL) && (pdata.flags & AT24_FLAG_MAC)) {
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if ((flags & AT24_FLAG_SERIAL) && (flags & AT24_FLAG_MAC)) {
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dev_err(dev,
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"invalid device data - cannot have both AT24_FLAG_SERIAL & AT24_FLAG_MAC.");
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return -EINVAL;
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}
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regmap_config.val_bits = 8;
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regmap_config.reg_bits = (pdata.flags & AT24_FLAG_ADDR16) ? 16 : 8;
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regmap_config.reg_bits = (flags & AT24_FLAG_ADDR16) ? 16 : 8;
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regmap_config.disable_locking = true;
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regmap = devm_regmap_init_i2c(client, ®map_config);
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@ -675,11 +667,11 @@ static int at24_probe(struct i2c_client *client)
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return -ENOMEM;
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mutex_init(&at24->lock);
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at24->byte_len = pdata.byte_len;
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at24->page_size = pdata.page_size;
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at24->flags = pdata.flags;
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at24->byte_len = byte_len;
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at24->page_size = page_size;
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at24->flags = flags;
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at24->num_addresses = num_addresses;
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at24->offset_adj = at24_get_offset_adj(pdata.flags, pdata.byte_len);
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at24->offset_adj = at24_get_offset_adj(flags, byte_len);
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at24->client[0].client = client;
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at24->client[0].regmap = regmap;
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@ -687,10 +679,10 @@ static int at24_probe(struct i2c_client *client)
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if (IS_ERR(at24->wp_gpio))
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return PTR_ERR(at24->wp_gpio);
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writable = !(pdata.flags & AT24_FLAG_READONLY);
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writable = !(flags & AT24_FLAG_READONLY);
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if (writable) {
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at24->write_max = min_t(unsigned int,
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pdata.page_size, at24_io_limit);
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page_size, at24_io_limit);
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if (!i2c_fn_i2c && at24->write_max > I2C_SMBUS_BLOCK_MAX)
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at24->write_max = I2C_SMBUS_BLOCK_MAX;
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}
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@ -733,7 +725,7 @@ static int at24_probe(struct i2c_client *client)
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nvmem_config.priv = at24;
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nvmem_config.stride = 1;
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nvmem_config.word_size = 1;
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nvmem_config.size = pdata.byte_len;
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nvmem_config.size = byte_len;
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at24->nvmem = devm_nvmem_register(dev, &nvmem_config);
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if (IS_ERR(at24->nvmem)) {
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@ -742,13 +734,9 @@ static int at24_probe(struct i2c_client *client)
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}
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dev_info(dev, "%u byte %s EEPROM, %s, %u bytes/write\n",
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pdata.byte_len, client->name,
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byte_len, client->name,
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writable ? "writable" : "read-only", at24->write_max);
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/* export data to kernel code */
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if (pdata.setup)
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pdata.setup(at24->nvmem, pdata.context);
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return 0;
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err_clients:
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@ -1,60 +0,0 @@
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/*
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* at24.h - platform_data for the at24 (generic eeprom) driver
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* (C) Copyright 2008 by Pengutronix
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* (C) Copyright 2012 by Wolfram Sang
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* same license as the driver
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*/
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#ifndef _LINUX_AT24_H
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#define _LINUX_AT24_H
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#include <linux/types.h>
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#include <linux/nvmem-consumer.h>
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#include <linux/bitops.h>
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/**
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* struct at24_platform_data - data to set up at24 (generic eeprom) driver
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* @byte_len: size of eeprom in byte
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* @page_size: number of byte which can be written in one go
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* @flags: tunable options, check AT24_FLAG_* defines
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* @setup: an optional callback invoked after eeprom is probed; enables kernel
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code to access eeprom via nvmem, see example
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* @context: optional parameter passed to setup()
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*
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* If you set up a custom eeprom type, please double-check the parameters.
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* Especially page_size needs extra care, as you risk data loss if your value
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* is bigger than what the chip actually supports!
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*
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* An example in pseudo code for a setup() callback:
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*
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* void get_mac_addr(struct nvmem_device *nvmem, void *context)
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* {
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* u8 *mac_addr = ethernet_pdata->mac_addr;
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* off_t offset = context;
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*
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* // Read MAC addr from EEPROM
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* if (nvmem_device_read(nvmem, offset, ETH_ALEN, mac_addr) == ETH_ALEN)
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* pr_info("Read MAC addr from EEPROM: %pM\n", mac_addr);
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* }
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*
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* This function pointer and context can now be set up in at24_platform_data.
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*/
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struct at24_platform_data {
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u32 byte_len; /* size (sum of all addr) */
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u16 page_size; /* for writes */
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u8 flags;
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#define AT24_FLAG_ADDR16 BIT(7) /* address pointer is 16 bit */
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#define AT24_FLAG_READONLY BIT(6) /* sysfs-entry will be read-only */
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#define AT24_FLAG_IRUGO BIT(5) /* sysfs-entry will be world-readable */
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#define AT24_FLAG_TAKE8ADDR BIT(4) /* take always 8 addresses (24c00) */
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#define AT24_FLAG_SERIAL BIT(3) /* factory-programmed serial number */
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#define AT24_FLAG_MAC BIT(2) /* factory-programmed mac address */
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#define AT24_FLAG_NO_RDROL BIT(1) /* does not auto-rollover reads to */
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/* the next slave address */
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void (*setup)(struct nvmem_device *nvmem, void *context);
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void *context;
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};
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#endif /* _LINUX_AT24_H */
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