[PATCH v7 14/15] pinctrl: single: support generic pinconf

[Tony Lindgren]

Hi,

* Haojian Zhuang <haojian.zhuang at linaro.org> [130117 23:35]:
> +static int pcs_parse_pinconf(struct pcs_device *pcs, struct device_node *np,
> +			     struct pcs_function *func,
> +			     struct pinctrl_map **map)
> +
> +{
> +	struct pinctrl_map *m = *map;
> +	int i = 0, nconfs = 0;
> +	unsigned long *settings = NULL, *s = NULL;
> +	struct pcs_conf_vals *conf = NULL;
> +	struct pcs_conf_type prop2[] = {
> +		{ "pinctrl-single,power-source", PIN_CONFIG_POWER_SOURCE, },
> +		{ "pinctrl-single,slew-rate", PIN_CONFIG_SLEW_RATE, },
> +		{ "pinctrl-single,input-schmitt", PIN_CONFIG_INPUT_SCHMITT, },
> +	};

The PIN_CONFIG_POWER_SOURCE should be split to PIN_CONFIG_POWER_ENABLE
and PIN_CONFIG_POWER_SOURCE. If you only have one bit for it, I guess then
you can just use PIN_CONFIG_POWER_ENABLE and make PIN_CONFIG_POWER_SOURCE
a NOP.

I also suggest we standardize on PIN_CONFIG_*_ENABLE on the naming instead
of PIN_CONFIG_*_DISABLE. Many of these features enable some input logic,
and by default they should be off to save power.

> +	struct pcs_conf_type prop3[] = {
> +		{ "pinctrl-single,bias-disable", PIN_CONFIG_BIAS_DISABLE, },
> +		{ "pinctrl-single,bias-pullup", PIN_CONFIG_BIAS_PULL_UP, },
> +		{ "pinctrl-single,bias-pulldown", PIN_CONFIG_BIAS_PULL_DOWN, },
> +		{ "pinctrl-single,input-schmitt-disable",
> +			PIN_CONFIG_INPUT_SCHMITT_DISABLE, },
> +	};

I'm not aware of cases where we need both INPUT_SCHMITT and INPUT_SCHMITT_DISABLE,
so we may just want to have INPUT_SCHMITT_ENABLE if that works for you.

Other than that, looks good to me. I'll update my patches here and do
some tests against my pinctrl-single,bits testcase.

Regards,

Tony