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| author | Jean Delvare <jdelvare@suse.de> | 2023-11-14 15:13:28 +0100 |
|---|---|---|
| committer | Wolfram Sang <wsa@kernel.org> | 2024-01-18 21:10:42 +0100 |
| commit | 13e3a512a29001cab68fe9a0c12be94e6d42a10c (patch) | |
| tree | 12dd8a490091500b721b6ae196e81c7fd444caa8 /drivers/i2c | |
| parent | 92a85b7c6262f19c65a1c115cf15f411ba65a57c (diff) | |
| download | linux-13e3a512a29001cab68fe9a0c12be94e6d42a10c.tar.gz linux-13e3a512a29001cab68fe9a0c12be94e6d42a10c.tar.bz2 linux-13e3a512a29001cab68fe9a0c12be94e6d42a10c.zip | |
i2c: smbus: Support up to 8 SPD EEPROMs
I originally restricted i2c_register_spd() to only support systems
with up to 4 memory slots, so that we can experiment with it on
a limited numbers of systems. It's been more than 3 years and it
seems to work just fine, so the time has come to lift this arbitrary
limitation.
The maximum number of memory slots which can be connected to a single
I2C segment is 8, so support that many SPD EEPROMs. Any system with
more than 8 memory slots would have either multiple SMBus channels
or SMBus multiplexing, so it would need dedicated care. We'll get to
that later as needed.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/i2c-smbus.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/i2c/i2c-smbus.c b/drivers/i2c/i2c-smbus.c index 138c3f5e0093..74807c6db596 100644 --- a/drivers/i2c/i2c-smbus.c +++ b/drivers/i2c/i2c-smbus.c @@ -308,8 +308,8 @@ EXPORT_SYMBOL_GPL(i2c_free_slave_host_notify_device); * target systems are the same. * Restrictions to automatic SPD instantiation: * - Only works if all filled slots have the same memory type - * - Only works for DDR2, DDR3 and DDR4 for now - * - Only works on systems with 1 to 4 memory slots + * - Only works for DDR, DDR2, DDR3 and DDR4 for now + * - Only works on systems with 1 to 8 memory slots */ #if IS_ENABLED(CONFIG_DMI) void i2c_register_spd(struct i2c_adapter *adap) @@ -354,9 +354,9 @@ void i2c_register_spd(struct i2c_adapter *adap) dev_info(&adap->dev, "%d/%d memory slots populated (from DMI)\n", dimm_count, slot_count); - if (slot_count > 4) { + if (slot_count > 8) { dev_warn(&adap->dev, - "Systems with more than 4 memory slots not supported yet, not instantiating SPD\n"); + "Systems with more than 8 memory slots not supported yet, not instantiating SPD\n"); return; } |