diff options
Diffstat (limited to 'drivers/i2c/i2c-smbus.c')
| -rw-r--r-- | drivers/i2c/i2c-smbus.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/drivers/i2c/i2c-smbus.c b/drivers/i2c/i2c-smbus.c index 7d40e7aa3799..0316b347f9e7 100644 --- a/drivers/i2c/i2c-smbus.c +++ b/drivers/i2c/i2c-smbus.c @@ -372,12 +372,13 @@ EXPORT_SYMBOL_GPL(i2c_free_slave_host_notify_device); * - Only works on systems with 1 to 8 memory slots */ #if IS_ENABLED(CONFIG_DMI) -void i2c_register_spd(struct i2c_adapter *adap) +static void i2c_register_spd(struct i2c_adapter *adap, bool write_disabled) { int n, slot_count = 0, dimm_count = 0; u16 handle; u8 common_mem_type = 0x0, mem_type; u64 mem_size; + bool instantiate = true; const char *name; while ((handle = dmi_memdev_handle(slot_count)) != 0xffff) { @@ -438,6 +439,7 @@ void i2c_register_spd(struct i2c_adapter *adap) case 0x22: /* DDR5 */ case 0x23: /* LPDDR5 */ name = "spd5118"; + instantiate = !write_disabled; break; default: dev_info(&adap->dev, @@ -461,6 +463,9 @@ void i2c_register_spd(struct i2c_adapter *adap) addr_list[0] = 0x50 + n; addr_list[1] = I2C_CLIENT_END; + if (!instantiate) + continue; + if (!IS_ERR(i2c_new_scanned_device(adap, &info, addr_list, NULL))) { dev_info(&adap->dev, "Successfully instantiated SPD at 0x%hx\n", @@ -469,7 +474,19 @@ void i2c_register_spd(struct i2c_adapter *adap) } } } -EXPORT_SYMBOL_GPL(i2c_register_spd); + +void i2c_register_spd_write_disable(struct i2c_adapter *adap) +{ + i2c_register_spd(adap, true); +} +EXPORT_SYMBOL_GPL(i2c_register_spd_write_disable); + +void i2c_register_spd_write_enable(struct i2c_adapter *adap) +{ + i2c_register_spd(adap, false); +} +EXPORT_SYMBOL_GPL(i2c_register_spd_write_enable); + #endif MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>"); |