Commit 996815d1 authored by Stephen Rothwell's avatar Stephen Rothwell

Merge remote-tracking branch 'at24/at24/for-next'

parents 9738147b 3b054878
......@@ -2510,7 +2510,6 @@ T: git git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux.git
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>
......
......@@ -18,7 +18,7 @@
#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>
......@@ -457,12 +457,9 @@ static struct nvmem_cell_lookup da830_evm_nvmem_cell_lookup = {
.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,
......@@ -496,7 +493,7 @@ static struct pcf857x_platform_data __initdata da830_evm_ui_expander_info = {
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),
......
......@@ -150,32 +150,6 @@ static struct spi_board_info da850evm_spi_info[] = {
},
};
#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",
......@@ -1494,8 +1468,6 @@ static __init void da850_evm_init(void)
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",
......
......@@ -18,7 +18,7 @@
#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>
......@@ -225,18 +225,15 @@ static struct nvmem_cell_lookup davinci_nvmem_cell_lookup = {
.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),
......
......@@ -16,8 +16,8 @@
#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>
......@@ -532,12 +532,9 @@ static struct nvmem_cell_lookup dm644evm_nvmem_cell_lookup = {
.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),
{ }
};
/*
......@@ -647,7 +644,7 @@ static struct i2c_board_info __initdata i2c_info[] = {
},
{
I2C_BOARD_INFO("24c256", 0x50),
.platform_data = &eeprom_info,
.properties = eeprom_properties,
},
{
I2C_BOARD_INFO("tlv320aic33", 0x1b),
......
......@@ -22,7 +22,7 @@
#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>
......@@ -364,12 +364,9 @@ static struct nvmem_cell_lookup dm646x_evm_nvmem_cell_lookup = {
.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
......@@ -440,7 +437,7 @@ static void evm_init_cpld(void)
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),
......
......@@ -14,11 +14,13 @@
#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>
......@@ -117,11 +119,15 @@ static void mityomapl138_cpufreq_init(const char *partnum)
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");
......@@ -147,21 +153,20 @@ static void read_factory_config(struct nvmem_device *nvmem, void *context)
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.
......@@ -187,12 +192,10 @@ static struct nvmem_cell_lookup mityomapl138_nvmem_cell_lookup = {
.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 = {
......@@ -321,7 +324,7 @@ static struct i2c_board_info __initdata mityomap_tps65023_info[] = {
},
{
I2C_BOARD_INFO("24c02", 0x50),
.platform_data = &mityomapl138_fd_chip,
.properties = mityomapl138_fd_chip_properties,
},
};
......@@ -569,6 +572,7 @@ static void __init mityomapl138_init(void)
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);
......
......@@ -26,7 +26,7 @@
#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>
......@@ -92,16 +92,15 @@ static struct platform_device davinci_sffsdr_nandflash_device = {
.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)
......
......@@ -26,21 +26,6 @@ EXPORT_SYMBOL(davinci_soc_info);
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;
......
......@@ -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, &regmap_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:
......
......@@ -46,5 +46,4 @@ enum {
EMAC_VERSION_2, /* DM646x */
};
void davinci_get_mac_addr(struct nvmem_device *nvmem, void *context);
#endif
/*
* 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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