diff options
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/muxes/i2c-mux-mlxcpld.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/drivers/i2c/muxes/i2c-mux-mlxcpld.c b/drivers/i2c/muxes/i2c-mux-mlxcpld.c index b53f1479272d..113ad84cdd94 100644 --- a/drivers/i2c/muxes/i2c-mux-mlxcpld.c +++ b/drivers/i2c/muxes/i2c-mux-mlxcpld.c @@ -18,12 +18,12 @@ #define CPLD_MUX_MAX_NCHANS 8 /* mlxcpld_mux - mux control structure: - * @last_chan - last register value + * @last_val - last selected register value or -1 if mux deselected * @client - I2C device client * @pdata: platform data */ struct mlxcpld_mux { - u8 last_chan; + int last_val; struct i2c_client *client; struct mlxcpld_mux_plat_data pdata; }; @@ -60,7 +60,7 @@ struct mlxcpld_mux { * for this as they will try to lock adapter a second time. */ static int mlxcpld_mux_reg_write(struct i2c_adapter *adap, - struct mlxcpld_mux *mux, u8 val) + struct mlxcpld_mux *mux, u32 val) { struct i2c_client *client = mux->client; union i2c_smbus_data data = { .byte = val }; @@ -73,13 +73,13 @@ static int mlxcpld_mux_reg_write(struct i2c_adapter *adap, static int mlxcpld_mux_select_chan(struct i2c_mux_core *muxc, u32 chan) { struct mlxcpld_mux *mux = i2c_mux_priv(muxc); - u8 regval = chan + 1; + u32 regval = chan + 1; int err = 0; /* Only select the channel if its different from the last channel */ - if (mux->last_chan != regval) { + if (mux->last_val != regval) { err = mlxcpld_mux_reg_write(muxc->parent, mux, regval); - mux->last_chan = err < 0 ? 0 : regval; + mux->last_val = err < 0 ? -1 : regval; } return err; @@ -90,9 +90,9 @@ static int mlxcpld_mux_deselect(struct i2c_mux_core *muxc, u32 chan) struct mlxcpld_mux *mux = i2c_mux_priv(muxc); /* Deselect active channel */ - mux->last_chan = 0; + mux->last_val = -1; - return mlxcpld_mux_reg_write(muxc->parent, mux, mux->last_chan); + return mlxcpld_mux_reg_write(muxc->parent, mux, 0); } /* Probe/reomove functions */ @@ -122,7 +122,7 @@ static int mlxcpld_mux_probe(struct platform_device *pdev) data = i2c_mux_priv(muxc); data->client = client; memcpy(&data->pdata, pdata, sizeof(*pdata)); - data->last_chan = 0; /* force the first selection */ + data->last_val = -1; /* force the first selection */ /* Create an adapter for each channel. */ for (num = 0; num < CPLD_MUX_MAX_NCHANS; num++) { |