[U-Boot] [PATCH v3 7/9] pinctrl: stm32: Add get_pin_muxing() ops

[Patrice CHOTARD <patrice.chotard@st.com>]

Hi Simon

On 10/19/18 5:25 AM, Simon Glass wrote:
> Hi Patrice,
> 
> On 9 October 2018 at 07:31, Patrice Chotard <patrice.chotard@st.com> wrote:
>> Add get_pin_muxing() ops to obtain the pin muxing description
>> a given pin index.
>>
>> Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
>> ---
>>
>> Changes in v3: None
>> Changes in v2: None
>>
>>  drivers/pinctrl/pinctrl_stm32.c | 77 +++++++++++++++++++++++++++++++++++++++++
>>  1 file changed, 77 insertions(+)
>>
>> diff --git a/drivers/pinctrl/pinctrl_stm32.c b/drivers/pinctrl/pinctrl_stm32.c
>> index e0bee4b97bd5..588efda8df4b 100644
>> --- a/drivers/pinctrl/pinctrl_stm32.c
>> +++ b/drivers/pinctrl/pinctrl_stm32.c
>> @@ -27,8 +27,34 @@ struct stm32_gpio_bank {
>>
>>  #define MAX_PIN_PER_BANK               16
>>
>> +#define MAX_PIN_MUX_LEN                        40
>> +static char pin_mux[MAX_PIN_MUX_LEN];
>> +
>>  #define MAX_PIN_NAME_LEN               12
>>  static char pin_name[MAX_PIN_NAME_LEN];
>> +#define PINMUX_MODE_COUNT              5
>> +static const char * const pinmux_mode[PINMUX_MODE_COUNT] = {
>> +       "gpio input",
>> +       "gpio output",
>> +       "analog",
>> +       "unknown",
>> +       "alt function",
>> +};
>> +
>> +static int stm32_pinctrl_get_af(struct udevice *dev, unsigned int offset)
>> +{
>> +       struct stm32_gpio_priv *priv = dev_get_priv(dev);
>> +       struct stm32_gpio_regs *regs = priv->regs;
>> +       u32 af;
>> +       u32 alt_shift = (offset % 8) * 4;
>> +       u32 alt_index =  offset / 8;
>> +
>> +       af = (readl(&regs->afr[alt_index]) &
>> +             GENMASK(alt_shift + 3, alt_shift)) >> alt_shift;
>> +
>> +       return af;
>> +}
>> +
>>  static int stm32_pinctrl_get_pins_count(struct udevice *dev)
>>  {
>>         struct stm32_pinctrl_priv *priv = dev_get_priv(dev);
>> @@ -97,6 +123,56 @@ static const char *stm32_pinctrl_get_pin_name(struct udevice *dev,
>>
>>         return pin_name;
>>  }
>> +
>> +static const char *stm32_pinctrl_get_pin_muxing(struct udevice *dev,
>> +                                               unsigned int selector)
> 
> Again I think this should be passed a buffer to write into.

Ok

Thanks

Patrice

> 
> Regards,
> Simon
>