| Message ID | 20210204162451.29518-4-vadimp@nvidia.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | i2c: mux: mlxcpld: Extend driver functionality | expand |
On 2021-02-04 17:24, Vadim Pasternak wrote: > Do not set the argument 'force_nr' of i2c_mux_add_adapter() routine, > instead provide argument 'chan_id'. > Rename mux ids array from 'adap_ids' to 'chan_ids'. > > The motivation is to prepare infrastructure to be able to: > - Create only the child adapters which are actually needed - for which > channel ids are specified. > - To assign 'nrs' to these child adapters dynamically, with no 'nr' > enforcement. > > Signed-off-by: Vadim Pasternak <vadimp@nvidia.com> > --- > v3->v4: > Comments pointed out by Peter: > - Extend patch with the code from the next patches dealing with > argument two and three of the i2c_mux_add_adapter() routine. > v2->v3: > Changes added by Vadim: > - Rename patch from "Rename mux ids array" to "Get rid of adapter > numbers enforcement". > --- > drivers/i2c/muxes/i2c-mux-mlxcpld.c | 11 ++--------- > include/linux/platform_data/mlxcpld.h | 4 ++-- > 2 files changed, 4 insertions(+), 11 deletions(-) > > diff --git a/drivers/i2c/muxes/i2c-mux-mlxcpld.c b/drivers/i2c/muxes/i2c-mux-mlxcpld.c > index 113ad84cdd94..388fe5c080aa 100644 > --- a/drivers/i2c/muxes/i2c-mux-mlxcpld.c > +++ b/drivers/i2c/muxes/i2c-mux-mlxcpld.c > @@ -101,9 +101,8 @@ static int mlxcpld_mux_probe(struct platform_device *pdev) > 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; > - int err; > + int num, err; > > if (!pdata) > return -EINVAL; > @@ -126,13 +125,7 @@ static int mlxcpld_mux_probe(struct platform_device *pdev) > > /* Create an adapter for each channel. */ > for (num = 0; num < CPLD_MUX_MAX_NCHANS; num++) { > - if (num >= pdata->num_adaps) > - /* discard unconfigured channels */ > - break; It's premature to remove this check here. At this stage, the loop must still be broken when either CPLD_MUX_MAX_NCHANS (can't hold more adapters) or pdata->num_adaps (no more chan_ids are provided) is reached. So, move these three lines to 5/6 where you actually change the loop condition. With that change I think we're done with this series. Yay! Cheers, Peter > - > - force = pdata->adap_ids[num]; > - > - err = i2c_mux_add_adapter(muxc, force, num, 0); > + err = i2c_mux_add_adapter(muxc, 0, pdata->chan_ids[num], 0); > if (err) > goto virt_reg_failed; > } > diff --git a/include/linux/platform_data/mlxcpld.h b/include/linux/platform_data/mlxcpld.h > index e6c18bf017dd..04d93c563c04 100644 > --- a/include/linux/platform_data/mlxcpld.h > +++ b/include/linux/platform_data/mlxcpld.h > @@ -11,12 +11,12 @@ > /* Platform data for the CPLD I2C multiplexers */ > > /* mlxcpld_mux_plat_data - per mux data, used with i2c_register_board_info > - * @adap_ids - adapter array > + * @chan_ids - channels array > * @num_adaps - number of adapters > * @sel_reg_addr - mux select register offset in CPLD space > */ > struct mlxcpld_mux_plat_data { > - int *adap_ids; > + int *chan_ids; > int num_adaps; > int sel_reg_addr; > }; >
diff --git a/drivers/i2c/muxes/i2c-mux-mlxcpld.c b/drivers/i2c/muxes/i2c-mux-mlxcpld.c index 113ad84cdd94..388fe5c080aa 100644 --- a/drivers/i2c/muxes/i2c-mux-mlxcpld.c +++ b/drivers/i2c/muxes/i2c-mux-mlxcpld.c @@ -101,9 +101,8 @@ static int mlxcpld_mux_probe(struct platform_device *pdev) 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; - int err; + int num, err; if (!pdata) return -EINVAL; @@ -126,13 +125,7 @@ static int mlxcpld_mux_probe(struct platform_device *pdev) /* Create an adapter for each channel. */ for (num = 0; num < CPLD_MUX_MAX_NCHANS; num++) { - if (num >= pdata->num_adaps) - /* discard unconfigured channels */ - break; - - force = pdata->adap_ids[num]; - - err = i2c_mux_add_adapter(muxc, force, num, 0); + err = i2c_mux_add_adapter(muxc, 0, pdata->chan_ids[num], 0); if (err) goto virt_reg_failed; } diff --git a/include/linux/platform_data/mlxcpld.h b/include/linux/platform_data/mlxcpld.h index e6c18bf017dd..04d93c563c04 100644 --- a/include/linux/platform_data/mlxcpld.h +++ b/include/linux/platform_data/mlxcpld.h @@ -11,12 +11,12 @@ /* Platform data for the CPLD I2C multiplexers */ /* mlxcpld_mux_plat_data - per mux data, used with i2c_register_board_info - * @adap_ids - adapter array + * @chan_ids - channels array * @num_adaps - number of adapters * @sel_reg_addr - mux select register offset in CPLD space */ struct mlxcpld_mux_plat_data { - int *adap_ids; + int *chan_ids; int num_adaps; int sel_reg_addr; };
Do not set the argument 'force_nr' of i2c_mux_add_adapter() routine, instead provide argument 'chan_id'. Rename mux ids array from 'adap_ids' to 'chan_ids'. The motivation is to prepare infrastructure to be able to: - Create only the child adapters which are actually needed - for which channel ids are specified. - To assign 'nrs' to these child adapters dynamically, with no 'nr' enforcement. Signed-off-by: Vadim Pasternak <vadimp@nvidia.com> --- v3->v4: Comments pointed out by Peter: - Extend patch with the code from the next patches dealing with argument two and three of the i2c_mux_add_adapter() routine. v2->v3: Changes added by Vadim: - Rename patch from "Rename mux ids array" to "Get rid of adapter numbers enforcement". --- drivers/i2c/muxes/i2c-mux-mlxcpld.c | 11 ++--------- include/linux/platform_data/mlxcpld.h | 4 ++-- 2 files changed, 4 insertions(+), 11 deletions(-)