diff options
| author | Nico Huber <nico.huber@secunet.com> | 2017-08-01 17:09:35 +0200 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2017-08-18 15:33:45 +0000 |
| commit | 581738642fbeacdf97fc737a41b3128d72cf1a1c (patch) | |
| tree | 8f40edb039a66fb6ccdc29b88f7e3b007b048e82 /src/soc/intel/common/block/i2c/i2c.c | |
| parent | 0f2dd1eff9930e30dddd9aabceb5d85ee3b4e980 (diff) | |
Reinvent I2C ops
Do not use the global platform_i2c_transfer() function that can only be
implemented by a single driver. Instead, make a `struct device` aware
transfer() function the only interface function for I2C controller dri-
vers to implement.
To not force the slave device drivers to be implemented either above
generic I2C or specialized SMBus operations, we support SMBus control-
lers in the slave device interface too.
We start with four simple slave functions: i2c_readb(), i2c_writeb(),
i2c_readb_at() and i2c_writeb_at(). They are all compatible to respec-
tive SMBus functions. But we keep aliases because it would be weird to
force e.g. an I2C EEPROM driver to call smbus_read_byte().
Change-Id: I98386f91bf4799ba3df84ec8bc0f64edd4142818
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/20846
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Diffstat (limited to 'src/soc/intel/common/block/i2c/i2c.c')
| -rw-r--r-- | src/soc/intel/common/block/i2c/i2c.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/src/soc/intel/common/block/i2c/i2c.c b/src/soc/intel/common/block/i2c/i2c.c index aeb6d8f2ed..625bb991d4 100644 --- a/src/soc/intel/common/block/i2c/i2c.c +++ b/src/soc/intel/common/block/i2c/i2c.c @@ -150,8 +150,14 @@ static void lpss_i2c_acpi_fill_ssdt(struct device *dev) acpigen_pop_len(); } -static struct i2c_bus_operations i2c_bus_ops = { - .dev_to_bus = &lpss_i2c_dev_to_bus, +static int lpss_i2c_dev_transfer(struct device *dev, + const struct i2c_msg *msg, size_t count) +{ + return lpss_i2c_transfer(lpss_i2c_dev_to_bus(dev), msg, count); +} + +static const struct i2c_bus_operations i2c_bus_ops = { + .transfer = lpss_i2c_dev_transfer, }; static struct device_operations i2c_dev_ops = { |