diff options
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/muxes/i2c-mux-mlxcpld.c | 62 |
1 files changed, 28 insertions, 34 deletions
diff --git a/drivers/i2c/muxes/i2c-mux-mlxcpld.c b/drivers/i2c/muxes/i2c-mux-mlxcpld.c index 3d894cfb19df..b53f1479272d 100644 --- a/drivers/i2c/muxes/i2c-mux-mlxcpld.c +++ b/drivers/i2c/muxes/i2c-mux-mlxcpld.c @@ -20,10 +20,12 @@ /* mlxcpld_mux - mux control structure: * @last_chan - last register value * @client - I2C device client + * @pdata: platform data */ struct mlxcpld_mux { u8 last_chan; struct i2c_client *client; + struct mlxcpld_mux_plat_data pdata; }; /* MUX logic description. @@ -54,37 +56,30 @@ struct mlxcpld_mux { * */ -static const struct i2c_device_id mlxcpld_mux_id[] = { - { "mlxcpld_mux_module", 0 }, - { } -}; -MODULE_DEVICE_TABLE(i2c, mlxcpld_mux_id); - /* Write to mux register. Don't use i2c_transfer() and i2c_smbus_xfer() * for this as they will try to lock adapter a second time. */ static int mlxcpld_mux_reg_write(struct i2c_adapter *adap, - struct i2c_client *client, u8 val) + struct mlxcpld_mux *mux, u8 val) { - struct mlxcpld_mux_plat_data *pdata = dev_get_platdata(&client->dev); + struct i2c_client *client = mux->client; union i2c_smbus_data data = { .byte = val }; return __i2c_smbus_xfer(adap, client->addr, client->flags, - I2C_SMBUS_WRITE, pdata->sel_reg_addr, + I2C_SMBUS_WRITE, mux->pdata.sel_reg_addr, I2C_SMBUS_BYTE_DATA, &data); } static int mlxcpld_mux_select_chan(struct i2c_mux_core *muxc, u32 chan) { - struct mlxcpld_mux *data = i2c_mux_priv(muxc); - struct i2c_client *client = data->client; + struct mlxcpld_mux *mux = i2c_mux_priv(muxc); u8 regval = chan + 1; int err = 0; /* Only select the channel if its different from the last channel */ - if (data->last_chan != regval) { - err = mlxcpld_mux_reg_write(muxc->parent, client, regval); - data->last_chan = err < 0 ? 0 : regval; + if (mux->last_chan != regval) { + err = mlxcpld_mux_reg_write(muxc->parent, mux, regval); + mux->last_chan = err < 0 ? 0 : regval; } return err; @@ -92,21 +87,19 @@ static int mlxcpld_mux_select_chan(struct i2c_mux_core *muxc, u32 chan) static int mlxcpld_mux_deselect(struct i2c_mux_core *muxc, u32 chan) { - struct mlxcpld_mux *data = i2c_mux_priv(muxc); - struct i2c_client *client = data->client; + struct mlxcpld_mux *mux = i2c_mux_priv(muxc); /* Deselect active channel */ - data->last_chan = 0; + mux->last_chan = 0; - return mlxcpld_mux_reg_write(muxc->parent, client, data->last_chan); + return mlxcpld_mux_reg_write(muxc->parent, mux, mux->last_chan); } /* Probe/reomove functions */ -static int mlxcpld_mux_probe(struct i2c_client *client, - const struct i2c_device_id *id) +static int mlxcpld_mux_probe(struct platform_device *pdev) { - struct i2c_adapter *adap = client->adapter; - struct mlxcpld_mux_plat_data *pdata = dev_get_platdata(&client->dev); + struct mlxcpld_mux_plat_data *pdata = dev_get_platdata(&pdev->dev); + struct i2c_client *client = to_i2c_client(pdev->dev.parent); struct i2c_mux_core *muxc; int num, force; struct mlxcpld_mux *data; @@ -115,18 +108,20 @@ static int mlxcpld_mux_probe(struct i2c_client *client, if (!pdata) return -EINVAL; - if (!i2c_check_functionality(adap, I2C_FUNC_SMBUS_WRITE_BYTE_DATA)) + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_WRITE_BYTE_DATA)) return -ENODEV; - muxc = i2c_mux_alloc(adap, &client->dev, CPLD_MUX_MAX_NCHANS, + muxc = i2c_mux_alloc(client->adapter, &pdev->dev, CPLD_MUX_MAX_NCHANS, sizeof(*data), 0, mlxcpld_mux_select_chan, mlxcpld_mux_deselect); if (!muxc) return -ENOMEM; + platform_set_drvdata(pdev, muxc); data = i2c_mux_priv(muxc); - i2c_set_clientdata(client, muxc); data->client = client; + memcpy(&data->pdata, pdata, sizeof(*pdata)); data->last_chan = 0; /* force the first selection */ /* Create an adapter for each channel. */ @@ -149,24 +144,23 @@ virt_reg_failed: return err; } -static int mlxcpld_mux_remove(struct i2c_client *client) +static int mlxcpld_mux_remove(struct platform_device *pdev) { - struct i2c_mux_core *muxc = i2c_get_clientdata(client); + struct i2c_mux_core *muxc = platform_get_drvdata(pdev); i2c_mux_del_adapters(muxc); return 0; } -static struct i2c_driver mlxcpld_mux_driver = { - .driver = { - .name = "mlxcpld-mux", +static struct platform_driver mlxcpld_mux_driver = { + .driver = { + .name = "i2c-mux-mlxcpld", }, - .probe = mlxcpld_mux_probe, - .remove = mlxcpld_mux_remove, - .id_table = mlxcpld_mux_id, + .probe = mlxcpld_mux_probe, + .remove = mlxcpld_mux_remove, }; -module_i2c_driver(mlxcpld_mux_driver); +module_platform_driver(mlxcpld_mux_driver); MODULE_AUTHOR("Michael Shych (michaels@mellanox.com)"); MODULE_DESCRIPTION("Mellanox I2C-CPLD-MUX driver"); |