S: Maintained
F: Documentation/devicetree/bindings/eeprom/at24.txt
F: drivers/misc/eeprom/at24.c
-F: include/linux/platform_data/at24.h
ATA OVER ETHERNET (AOE) DRIVER
M: "Ed L. Cashin" <ed.cashin@acm.org>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/platform_data/pcf857x.h>
-#include <linux/platform_data/at24.h>
+#include <linux/property.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/spi/spi.h>
.con_id = "mac-address",
};
-static struct at24_platform_data da830_evm_i2c_eeprom_info = {
- .byte_len = SZ_256K / 8,
- .page_size = 64,
- .flags = AT24_FLAG_ADDR16,
- .setup = davinci_get_mac_addr,
- .context = (void *)0x7f00,
+static const struct property_entry da830_evm_i2c_eeprom_properties[] = {
+ PROPERTY_ENTRY_U32("pagesize", 64),
+ { }
};
static int __init da830_evm_ui_expander_setup(struct i2c_client *client,
static struct i2c_board_info __initdata da830_evm_i2c_devices[] = {
{
I2C_BOARD_INFO("24c256", 0x50),
- .platform_data = &da830_evm_i2c_eeprom_info,
+ .properties = da830_evm_i2c_eeprom_properties,
},
{
I2C_BOARD_INFO("tlv320aic3x", 0x18),
},
};
-#ifdef CONFIG_MTD
-static void da850_evm_m25p80_notify_add(struct mtd_info *mtd)
-{
- char *mac_addr = davinci_soc_info.emac_pdata->mac_addr;
- size_t retlen;
-
- if (!strcmp(mtd->name, "MAC-Address")) {
- mtd_read(mtd, 0, ETH_ALEN, &retlen, mac_addr);
- if (retlen == ETH_ALEN)
- pr_info("Read MAC addr from SPI Flash: %pM\n",
- mac_addr);
- }
-}
-
-static struct mtd_notifier da850evm_spi_notifier = {
- .add = da850_evm_m25p80_notify_add,
-};
-
-static void da850_evm_setup_mac_addr(void)
-{
- register_mtd_user(&da850evm_spi_notifier);
-}
-#else
-static void da850_evm_setup_mac_addr(void) { }
-#endif
-
static struct mtd_partition da850_evm_norflash_partition[] = {
{
.name = "bootloaders + env",
if (ret)
pr_warn("%s: SATA registration failed: %d\n", __func__, ret);
- da850_evm_setup_mac_addr();
-
ret = da8xx_register_rproc();
if (ret)
pr_warn("%s: dsp/rproc registration failed: %d\n",
#include <linux/i2c.h>
#include <linux/io.h>
#include <linux/clk.h>
-#include <linux/platform_data/at24.h>
+#include <linux/property.h>
#include <linux/leds.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
.con_id = "mac-address",
};
-static struct at24_platform_data eeprom_info = {
- .byte_len = (256*1024) / 8,
- .page_size = 64,
- .flags = AT24_FLAG_ADDR16,
- .setup = davinci_get_mac_addr,
- .context = (void *)0x7f00,
+static const struct property_entry eeprom_properties[] = {
+ PROPERTY_ENTRY_U32("pagesize", 64),
+ { }
};
static struct i2c_board_info i2c_info[] = {
{
I2C_BOARD_INFO("24c256", 0x50),
- .platform_data = &eeprom_info,
+ .properties = eeprom_properties,
},
{
I2C_BOARD_INFO("tlv320aic3x", 0x18),
#include <linux/gpio/machine.h>
#include <linux/i2c.h>
#include <linux/platform_data/pcf857x.h>
-#include <linux/platform_data/at24.h>
#include <linux/platform_data/gpio-davinci.h>
+#include <linux/property.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/rawnand.h>
#include <linux/mtd/partitions.h>
.con_id = "mac-address",
};
-static struct at24_platform_data eeprom_info = {
- .byte_len = (256*1024) / 8,
- .page_size = 64,
- .flags = AT24_FLAG_ADDR16,
- .setup = davinci_get_mac_addr,
- .context = (void *)0x7f00,
+static const struct property_entry eeprom_properties[] = {
+ PROPERTY_ENTRY_U32("pagesize", 64),
+ { }
};
/*
},
{
I2C_BOARD_INFO("24c256", 0x50),
- .platform_data = &eeprom_info,
+ .properties = eeprom_properties,
},
{
I2C_BOARD_INFO("tlv320aic33", 0x1b),
#include <linux/gpio.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
-#include <linux/platform_data/at24.h>
+#include <linux/property.h>
#include <linux/platform_data/pcf857x.h>
#include <linux/platform_data/ti-aemif.h>
.con_id = "mac-address",
};
-static struct at24_platform_data eeprom_info = {
- .byte_len = (256*1024) / 8,
- .page_size = 64,
- .flags = AT24_FLAG_ADDR16,
- .setup = davinci_get_mac_addr,
- .context = (void *)0x7f00,
+static const struct property_entry eeprom_properties[] = {
+ PROPERTY_ENTRY_U32("pagesize", 64),
+ { }
};
#endif
static struct i2c_board_info __initdata i2c_info[] = {
{
I2C_BOARD_INFO("24c256", 0x50),
- .platform_data = &eeprom_info,
+ .properties = eeprom_properties,
},
{
I2C_BOARD_INFO("pcf8574a", 0x38),
#include <linux/init.h>
#include <linux/console.h>
#include <linux/platform_device.h>
+#include <linux/property.h>
#include <linux/mtd/partitions.h>
+#include <linux/notifier.h>
+#include <linux/nvmem-consumer.h>
#include <linux/nvmem-provider.h>
#include <linux/regulator/machine.h>
#include <linux/i2c.h>
-#include <linux/platform_data/at24.h>
#include <linux/etherdevice.h>
#include <linux/spi/spi.h>
#include <linux/spi/flash.h>
static void mityomapl138_cpufreq_init(const char *partnum) { }
#endif
-static void read_factory_config(struct nvmem_device *nvmem, void *context)
+static int read_factory_config(struct notifier_block *nb,
+ unsigned long event, void *data)
{
int ret;
const char *partnum = NULL;
- struct davinci_soc_info *soc_info = &davinci_soc_info;
+ struct nvmem_device *nvmem = data;
+
+ if (strcmp(nvmem_dev_name(nvmem), "1-00500") != 0)
+ return NOTIFY_DONE;
if (!IS_BUILTIN(CONFIG_NVMEM)) {
pr_warn("Factory Config not available without CONFIG_NVMEM\n");
goto bad_config;
}
- pr_info("Found MAC = %pM\n", factory_config.mac);
- if (is_valid_ether_addr(factory_config.mac))
- memcpy(soc_info->emac_pdata->mac_addr,
- factory_config.mac, ETH_ALEN);
- else
- pr_warn("Invalid MAC found in factory config block\n");
-
partnum = factory_config.partnum;
pr_info("Part Number = %s\n", partnum);
bad_config:
/* default maximum speed is valid for all platforms */
mityomapl138_cpufreq_init(partnum);
+
+ return NOTIFY_STOP;
}
+static struct notifier_block mityomapl138_nvmem_notifier = {
+ .notifier_call = read_factory_config,
+};
+
/*
* We don't define a cell for factory config as it will be accessed from the
* board file using the nvmem notifier chain.
.con_id = "mac-address",
};
-static struct at24_platform_data mityomapl138_fd_chip = {
- .byte_len = 256,
- .page_size = 8,
- .flags = AT24_FLAG_READONLY | AT24_FLAG_IRUGO,
- .setup = read_factory_config,
- .context = NULL,
+static const struct property_entry mityomapl138_fd_chip_properties[] = {
+ PROPERTY_ENTRY_U32("pagesize", 8),
+ PROPERTY_ENTRY_BOOL("read-only"),
+ { }
};
static struct davinci_i2c_platform_data mityomap_i2c_0_pdata = {
},
{
I2C_BOARD_INFO("24c02", 0x50),
- .platform_data = &mityomapl138_fd_chip,
+ .properties = mityomapl138_fd_chip_properties,
},
};
davinci_serial_init(da8xx_serial_device);
+ nvmem_register_notifier(&mityomapl138_nvmem_notifier);
nvmem_add_cell_table(&mityomapl138_nvmem_cell_table);
nvmem_add_cell_lookups(&mityomapl138_nvmem_cell_lookup, 1);
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
-#include <linux/platform_data/at24.h>
+#include <linux/property.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/rawnand.h>
#include <linux/mtd/partitions.h>
.resource = davinci_sffsdr_nandflash_resource,
};
-static struct at24_platform_data eeprom_info = {
- .byte_len = (64*1024) / 8,
- .page_size = 32,
- .flags = AT24_FLAG_ADDR16,
+static const struct property_entry eeprom_properties[] = {
+ PROPERTY_ENTRY_U32("pagesize", 32),
+ { }
};
static struct i2c_board_info __initdata i2c_info[] = {
{
- I2C_BOARD_INFO("24lc64", 0x50),
- .platform_data = &eeprom_info,
+ I2C_BOARD_INFO("24c64", 0x50),
+ .properties = eeprom_properties,
},
/* Other I2C devices:
* MSP430, addr 0x23 (not used)
void __iomem *davinci_intc_base;
int davinci_intc_type;
-void davinci_get_mac_addr(struct nvmem_device *nvmem, void *context)
-{
- char *mac_addr = davinci_soc_info.emac_pdata->mac_addr;
- off_t offset = (off_t)context;
-
- if (!IS_BUILTIN(CONFIG_NVMEM)) {
- pr_warn("Cannot read MAC addr from EEPROM without CONFIG_NVMEM\n");
- return;
- }
-
- /* Read MAC addr from EEPROM */
- if (nvmem_device_read(nvmem, offset, ETH_ALEN, mac_addr) == ETH_ALEN)
- pr_info("Read MAC addr from EEPROM: %pM\n", mac_addr);
-}
-
static int __init davinci_init_id(struct davinci_soc_info *soc_info)
{
int i;
#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
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;
};
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));
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)
{
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;
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);
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;
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;
}
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)) {
}
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:
EMAC_VERSION_2, /* DM646x */
};
-void davinci_get_mac_addr(struct nvmem_device *nvmem, void *context);
#endif
+++ /dev/null
-/*
- * at24.h - platform_data for the at24 (generic eeprom) driver
- * (C) Copyright 2008 by Pengutronix
- * (C) Copyright 2012 by Wolfram Sang
- * same license as the driver
- */
-
-#ifndef _LINUX_AT24_H
-#define _LINUX_AT24_H
-
-#include <linux/types.h>
-#include <linux/nvmem-consumer.h>
-#include <linux/bitops.h>
-
-/**
- * struct at24_platform_data - data to set up at24 (generic eeprom) driver
- * @byte_len: size of eeprom in byte
- * @page_size: number of byte which can be written in one go
- * @flags: tunable options, check AT24_FLAG_* defines
- * @setup: an optional callback invoked after eeprom is probed; enables kernel
- code to access eeprom via nvmem, see example
- * @context: optional parameter passed to setup()
- *
- * If you set up a custom eeprom type, please double-check the parameters.
- * Especially page_size needs extra care, as you risk data loss if your value
- * is bigger than what the chip actually supports!
- *
- * An example in pseudo code for a setup() callback:
- *
- * void get_mac_addr(struct nvmem_device *nvmem, void *context)
- * {
- * u8 *mac_addr = ethernet_pdata->mac_addr;
- * off_t offset = context;
- *
- * // Read MAC addr from EEPROM
- * if (nvmem_device_read(nvmem, offset, ETH_ALEN, mac_addr) == ETH_ALEN)
- * pr_info("Read MAC addr from EEPROM: %pM\n", mac_addr);
- * }
- *
- * This function pointer and context can now be set up in at24_platform_data.
- */
-
-struct at24_platform_data {
- u32 byte_len; /* size (sum of all addr) */
- u16 page_size; /* for writes */
- u8 flags;
-#define AT24_FLAG_ADDR16 BIT(7) /* address pointer is 16 bit */
-#define AT24_FLAG_READONLY BIT(6) /* sysfs-entry will be read-only */
-#define AT24_FLAG_IRUGO BIT(5) /* sysfs-entry will be world-readable */
-#define AT24_FLAG_TAKE8ADDR BIT(4) /* take always 8 addresses (24c00) */
-#define AT24_FLAG_SERIAL BIT(3) /* factory-programmed serial number */
-#define AT24_FLAG_MAC BIT(2) /* factory-programmed mac address */
-#define AT24_FLAG_NO_RDROL BIT(1) /* does not auto-rollover reads to */
- /* the next slave address */
-
- void (*setup)(struct nvmem_device *nvmem, void *context);
- void *context;
-};
-
-#endif /* _LINUX_AT24_H */
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