Hi Adam,
On 19-12-12 16:48, Adam Thomson wrote:
> On 12 December 2019 16:04, Marco Felsch wrote:
>
> > +static int da9062_gpio_set_config(struct gpio_chip *gc, unsigned int offset,
> > + unsigned long config)
> > +{
> > + struct da9062_pctl *pctl = gpiochip_get_data(gc);
> > + struct regmap *regmap = pctl->da9062->regmap;
> > + int gpio_mode;
> > +
> > + /*
> > + * We need to meet the following restrictions [1, Figure 18]:
> > + * - PIN_CONFIG_BIAS_PULL_DOWN -> only allowed if the pin is used as
> > + * gpio input
> > + * - PIN_CONFIG_BIAS_PULL_UP -> only allowed if the pin is used as
> > + * gpio output open-drain.
> > + */
> > +
> > + switch (pinconf_to_config_param(config)) {
> > + case PIN_CONFIG_BIAS_PULL_DOWN:
> > + gpio_mode = da9062_pctl_get_pin_mode(pctl, offset);
> > + if (gpio_mode < 0)
> > + return -EINVAL;
> > + else if (gpio_mode != DA9062_PIN_GPI)
> > + return -ENOTSUPP;
> > + return regmap_update_bits(regmap, DA9062AA_CONFIG_K,
> > + BIT(offset), BIT(offset));
> > + case PIN_CONFIG_BIAS_PULL_UP:
> > + gpio_mode = da9062_pctl_get_pin_mode(pctl, offset);
> > + if (gpio_mode < 0)
> > + return -EINVAL;
> > + else if (gpio_mode != DA9062_PIN_GPO_OD)
> > + return -ENOTSUPP;
> > + return regmap_update_bits(regmap, DA9062AA_CONFIG_K,
> > + BIT(offset), BIT(offset));
>
> Apologies for the delay on reviewing. Just looking at the datasheet, how do we
> disable PULL_DOWN (for input) and PULL_UP (for output)? Should we not have a
> 'PIN_CONFIG_BIAS_DISABLE' case here to handle this?
No worries, thanks for the review :)
Nice catch, Linus is it okay to add this as follow up patch? The current
patch isn't wrong without the 'PIN_CONFIG_BIAS_DISABLE' case.
Regards,
Marco
> > + case PIN_CONFIG_DRIVE_OPEN_DRAIN:
> > + return da9062_pctl_set_pin_mode(pctl, offset,
> > + DA9062_PIN_GPO_OD);
> > + case PIN_CONFIG_DRIVE_PUSH_PULL:
> > + return da9062_pctl_set_pin_mode(pctl, offset,
> > + DA9062_PIN_GPO_PP);
> > + default:
> > + return -ENOTSUPP;
> > + }
> > +}
>
