diff options
Diffstat (limited to 'drivers/misc/eeprom/at24.c')
| -rw-r--r-- | drivers/misc/eeprom/at24.c | 121 |
1 files changed, 69 insertions, 52 deletions
diff --git a/drivers/misc/eeprom/at24.c b/drivers/misc/eeprom/at24.c index 938c4f41b98c..f721825199ce 100644 --- a/drivers/misc/eeprom/at24.c +++ b/drivers/misc/eeprom/at24.c @@ -18,7 +18,6 @@ #include <linux/module.h> #include <linux/mutex.h> #include <linux/nvmem-provider.h> -#include <linux/of_device.h> #include <linux/pm_runtime.h> #include <linux/property.h> #include <linux/regmap.h> @@ -92,7 +91,7 @@ struct at24_data { * them for us. */ u8 bank_addr_shift; - struct regmap *client_regmaps[]; + struct regmap *client_regmaps[] __counted_by(num_addresses); }; /* @@ -173,6 +172,10 @@ AT24_CHIP_DATA(at24_data_24mac402, 48 / 8, AT24_FLAG_MAC | AT24_FLAG_READONLY); AT24_CHIP_DATA(at24_data_24mac602, 64 / 8, AT24_FLAG_MAC | AT24_FLAG_READONLY); +AT24_CHIP_DATA(at24_data_24aa025e48, 48 / 8, + AT24_FLAG_READONLY); +AT24_CHIP_DATA(at24_data_24aa025e64, 64 / 8, + AT24_FLAG_READONLY); /* spd is a 24c02 in memory DIMMs */ AT24_CHIP_DATA(at24_data_spd, 2048 / 8, AT24_FLAG_READONLY | AT24_FLAG_IRUGO); @@ -191,13 +194,19 @@ AT24_CHIP_DATA(at24_data_24c16, 16384 / 8, 0); AT24_CHIP_DATA(at24_data_24cs16, 16, AT24_FLAG_SERIAL | AT24_FLAG_READONLY); AT24_CHIP_DATA(at24_data_24c32, 32768 / 8, AT24_FLAG_ADDR16); +/* M24C32-D Additional Write lockable page (M24C32-D order codes) */ +AT24_CHIP_DATA(at24_data_24c32d_wlp, 32, AT24_FLAG_ADDR16); AT24_CHIP_DATA(at24_data_24cs32, 16, AT24_FLAG_ADDR16 | AT24_FLAG_SERIAL | AT24_FLAG_READONLY); AT24_CHIP_DATA(at24_data_24c64, 65536 / 8, AT24_FLAG_ADDR16); +/* M24C64-D Additional Write lockable page (M24C64-D order codes) */ +AT24_CHIP_DATA(at24_data_24c64d_wlp, 32, AT24_FLAG_ADDR16); AT24_CHIP_DATA(at24_data_24cs64, 16, AT24_FLAG_ADDR16 | AT24_FLAG_SERIAL | AT24_FLAG_READONLY); AT24_CHIP_DATA(at24_data_24c128, 131072 / 8, AT24_FLAG_ADDR16); AT24_CHIP_DATA(at24_data_24c256, 262144 / 8, AT24_FLAG_ADDR16); +/* M24256E Additional Write lockable page (M24256E-F order codes) */ +AT24_CHIP_DATA(at24_data_24256e_wlp, 64, AT24_FLAG_ADDR16); AT24_CHIP_DATA(at24_data_24c512, 524288 / 8, AT24_FLAG_ADDR16); AT24_CHIP_DATA(at24_data_24c1024, 1048576 / 8, AT24_FLAG_ADDR16); AT24_CHIP_DATA_BS(at24_data_24c1025, 1048576 / 8, AT24_FLAG_ADDR16, 2); @@ -213,6 +222,8 @@ static const struct i2c_device_id at24_ids[] = { { "24cs02", (kernel_ulong_t)&at24_data_24cs02 }, { "24mac402", (kernel_ulong_t)&at24_data_24mac402 }, { "24mac602", (kernel_ulong_t)&at24_data_24mac602 }, + { "24aa025e48", (kernel_ulong_t)&at24_data_24aa025e48 }, + { "24aa025e64", (kernel_ulong_t)&at24_data_24aa025e64 }, { "spd", (kernel_ulong_t)&at24_data_spd }, { "24c02-vaio", (kernel_ulong_t)&at24_data_24c02_vaio }, { "24c04", (kernel_ulong_t)&at24_data_24c04 }, @@ -222,11 +233,14 @@ static const struct i2c_device_id at24_ids[] = { { "24c16", (kernel_ulong_t)&at24_data_24c16 }, { "24cs16", (kernel_ulong_t)&at24_data_24cs16 }, { "24c32", (kernel_ulong_t)&at24_data_24c32 }, + { "24c32d-wl", (kernel_ulong_t)&at24_data_24c32d_wlp }, { "24cs32", (kernel_ulong_t)&at24_data_24cs32 }, { "24c64", (kernel_ulong_t)&at24_data_24c64 }, + { "24c64-wl", (kernel_ulong_t)&at24_data_24c64d_wlp }, { "24cs64", (kernel_ulong_t)&at24_data_24cs64 }, { "24c128", (kernel_ulong_t)&at24_data_24c128 }, { "24c256", (kernel_ulong_t)&at24_data_24c256 }, + { "24256e-wl", (kernel_ulong_t)&at24_data_24256e_wlp }, { "24c512", (kernel_ulong_t)&at24_data_24c512 }, { "24c1024", (kernel_ulong_t)&at24_data_24c1024 }, { "24c1025", (kernel_ulong_t)&at24_data_24c1025 }, @@ -252,8 +266,10 @@ static const struct of_device_id at24_of_match[] = { { .compatible = "atmel,24c16", .data = &at24_data_24c16 }, { .compatible = "atmel,24cs16", .data = &at24_data_24cs16 }, { .compatible = "atmel,24c32", .data = &at24_data_24c32 }, + { .compatible = "atmel,24c32d-wl", .data = &at24_data_24c32d_wlp }, { .compatible = "atmel,24cs32", .data = &at24_data_24cs32 }, { .compatible = "atmel,24c64", .data = &at24_data_24c64 }, + { .compatible = "atmel,24c64d-wl", .data = &at24_data_24c64d_wlp }, { .compatible = "atmel,24cs64", .data = &at24_data_24cs64 }, { .compatible = "atmel,24c128", .data = &at24_data_24c128 }, { .compatible = "atmel,24c256", .data = &at24_data_24c256 }, @@ -261,11 +277,14 @@ static const struct of_device_id at24_of_match[] = { { .compatible = "atmel,24c1024", .data = &at24_data_24c1024 }, { .compatible = "atmel,24c1025", .data = &at24_data_24c1025 }, { .compatible = "atmel,24c2048", .data = &at24_data_24c2048 }, + { .compatible = "microchip,24aa025e48", .data = &at24_data_24aa025e48 }, + { .compatible = "microchip,24aa025e64", .data = &at24_data_24aa025e64 }, + { .compatible = "st,24256e-wl", .data = &at24_data_24256e_wlp }, { /* END OF LIST */ }, }; MODULE_DEVICE_TABLE(of, at24_of_match); -static const struct acpi_device_id __maybe_unused at24_acpi_ids[] = { +static const struct acpi_device_id at24_acpi_ids[] = { { "INT3499", (kernel_ulong_t)&at24_data_INT3499 }, { "TPF0001", (kernel_ulong_t)&at24_data_24c1024 }, { /* END OF LIST */ } @@ -431,12 +450,9 @@ static int at24_read(void *priv, unsigned int off, void *val, size_t count) if (off + count > at24->byte_len) return -EINVAL; - ret = pm_runtime_get_sync(dev); - if (ret < 0) { - pm_runtime_put_noidle(dev); + ret = pm_runtime_resume_and_get(dev); + if (ret) return ret; - } - /* * Read data from chip, protecting against concurrent updates * from this host, but not from other I2C masters. @@ -478,12 +494,9 @@ static int at24_write(void *priv, unsigned int off, void *val, size_t count) if (off + count > at24->byte_len) return -EINVAL; - ret = pm_runtime_get_sync(dev); - if (ret < 0) { - pm_runtime_put_noidle(dev); + ret = pm_runtime_resume_and_get(dev); + if (ret) return ret; - } - /* * Write data to chip, protecting against concurrent updates * from this host, but not from other I2C masters. @@ -509,32 +522,6 @@ static int at24_write(void *priv, unsigned int off, void *val, size_t count) return 0; } -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; - - 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 ERR_PTR(-ENODEV); - - return cdata; -} - static int at24_make_dummy_client(struct at24_data *at24, unsigned int index, struct i2c_client *base_client, struct regmap_config *regmap_config) @@ -581,6 +568,31 @@ static unsigned int at24_get_offset_adj(u8 flags, unsigned int byte_len) } } +static void at24_probe_temp_sensor(struct i2c_client *client) +{ + struct at24_data *at24 = i2c_get_clientdata(client); + struct i2c_board_info info = { .type = "jc42" }; + int ret; + u8 val; + + /* + * Byte 2 has value 11 for DDR3, earlier versions don't + * support the thermal sensor present flag + */ + ret = at24_read(at24, 2, &val, 1); + if (ret || val != 11) + return; + + /* Byte 32, bit 7 is set if temp sensor is present */ + ret = at24_read(at24, 32, &val, 1); + if (ret || !(val & BIT(7))) + return; + + info.addr = 0x18 | (client->addr & 7); + + i2c_new_client_device(client->adapter, &info); +} + static int at24_probe(struct i2c_client *client) { struct regmap_config regmap_config = { }; @@ -601,9 +613,9 @@ static int at24_probe(struct i2c_client *client) i2c_fn_block = i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WRITE_I2C_BLOCK); - cdata = at24_get_chip_data(dev); - if (IS_ERR(cdata)) - return PTR_ERR(cdata); + cdata = i2c_get_match_data(client); + if (!cdata) + return -ENODEV; err = device_property_read_u32(dev, "pagesize", &page_size); if (err) @@ -756,14 +768,6 @@ static int at24_probe(struct i2c_client *client) } pm_runtime_enable(dev); - at24->nvmem = devm_nvmem_register(dev, &nvmem_config); - if (IS_ERR(at24->nvmem)) { - pm_runtime_disable(dev); - if (!pm_runtime_status_suspended(dev)) - regulator_disable(at24->vcc_reg); - return PTR_ERR(at24->nvmem); - } - /* * Perform a one-byte test read to verify that the chip is functional, * unless powering on the device is to be avoided during probe (i.e. @@ -779,6 +783,19 @@ static int at24_probe(struct i2c_client *client) } } + at24->nvmem = devm_nvmem_register(dev, &nvmem_config); + if (IS_ERR(at24->nvmem)) { + pm_runtime_disable(dev); + if (!pm_runtime_status_suspended(dev)) + regulator_disable(at24->vcc_reg); + return dev_err_probe(dev, PTR_ERR(at24->nvmem), + "failed to register nvmem\n"); + } + + /* If this a SPD EEPROM, probe for DDR3 thermal sensor */ + if (cdata == &at24_data_spd) + at24_probe_temp_sensor(client); + pm_runtime_idle(dev); if (writable) @@ -830,9 +847,9 @@ static struct i2c_driver at24_driver = { .name = "at24", .pm = &at24_pm_ops, .of_match_table = at24_of_match, - .acpi_match_table = ACPI_PTR(at24_acpi_ids), + .acpi_match_table = at24_acpi_ids, }, - .probe_new = at24_probe, + .probe = at24_probe, .remove = at24_remove, .id_table = at24_ids, .flags = I2C_DRV_ACPI_WAIVE_D0_PROBE, |