static int axp_pmx_get_function_groups(struct pinctrl_dev *pctldev,
		                       unsigned function,
		                       const char * const **groups,
		                       unsigned * const num_groups)
{
	struct axp_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
	
	*groups     = pctl->functions[function].groups;
	*num_groups = pctl->functions[function].ngroups;
	
	return 0;
}

static int axp_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
                                      unsigned selector,
                                      const unsigned **pins,
                                      unsigned *num_pins)
{
	struct axp_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);

	*pins = (unsigned *)&pctl->groups[selector].pin;
	*num_pins = 1;

	return 0;
}

static int oxnas_pinmux_get_function_groups(struct pinctrl_dev *pctldev,
					    unsigned int func,
					    const char * const **groups,
					    unsigned int * const num_groups)
{
	struct oxnas_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);

	*groups = pctl->functions[func].groups;
	*num_groups = pctl->functions[func].ngroups;

	return 0;
}

static int cygnus_get_function_groups(struct pinctrl_dev *pctrl_dev,
				      unsigned selector,
				      const char * const **groups,
				      unsigned * const num_groups)
{
	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);

	*groups = pinctrl->functions[selector].groups;
	*num_groups = pinctrl->functions[selector].num_groups;

	return 0;
}

static int ns_pinctrl_get_group_pins(struct pinctrl_dev *pctrl_dev,
				     unsigned int selector,
				     const unsigned int **pins,
				     unsigned int *num_pins)
{
	struct ns_pinctrl *ns_pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);

	*pins = ns_pinctrl->groups[selector].pins;
	*num_pins = ns_pinctrl->groups[selector].num_pins;

	return 0;
}

static int lpc18xx_pmx_get_func_groups(struct pinctrl_dev *pctldev,
				       unsigned function,
				       const char *const **groups,
				       unsigned *const num_groups)
{
	struct lpc18xx_scu_data *scu = pinctrl_dev_get_drvdata(pctldev);

	*groups  = scu->func[function].groups;
	*num_groups = scu->func[function].ngroups;

	return 0;
}

static int wmt_get_group_pins(struct pinctrl_dev *pctldev,
			      unsigned selector,
			      const unsigned **pins,
			      unsigned *num_pins)
{
	struct wmt_pinctrl_data *data = pinctrl_dev_get_drvdata(pctldev);

	*pins = &data->pins[selector].number;
	*num_pins = 1;

	return 0;
}

static int oxnas_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
					unsigned int group,
					const unsigned int **pins,
					unsigned int *num_pins)
{
	struct oxnas_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);

	*pins = &pctl->groups[group].pin;
	*num_pins = 1;

	return 0;
}

static int zynq_pctrl_get_group_pins(struct pinctrl_dev *pctldev,
				     unsigned selector,
				     const unsigned **pins,
				     unsigned *num_pins)
{
	struct zynq_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);

	*pins = pctrl->groups[selector].pins;
	*num_pins = pctrl->groups[selector].npins;

	return 0;
}

static int tegra_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
					unsigned group,
					const unsigned **pins,
					unsigned *num_pins)
{
	struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);

	*pins = pmx->soc->groups[group].pins;
	*num_pins = pmx->soc->groups[group].npins;

	return 0;
}

static int imx_pmx_get_groups(struct pinctrl_dev *pctldev, unsigned selector,
			       const char * const **groups,
			       unsigned * const num_groups)
{
	struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
	const struct imx_pinctrl_soc_info *info = ipctl->info;

	*groups = info->functions[selector].groups;
	*num_groups = info->functions[selector].num_groups;

	return 0;
}

static int mxs_pinctrl_get_func_groups(struct pinctrl_dev *pctldev,
				       unsigned group,
				       const char * const **groups,
				       unsigned * const num_groups)
{
	struct mxs_pinctrl_data *d = pinctrl_dev_get_drvdata(pctldev);

	*groups = d->soc->functions[group].groups;
	*num_groups = d->soc->functions[group].ngroups;

	return 0;
}

static int nmk_pmx_get_func_groups(struct pinctrl_dev *pctldev,
				   unsigned function,
				   const char * const **groups,
				   unsigned * const num_groups)
{
	struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);

	*groups = npct->soc->functions[function].groups;
	*num_groups = npct->soc->functions[function].ngroups;

	return 0;
}

static int pxa3xx_get_group_pins(struct pinctrl_dev *pctrldev,
				 unsigned selector,
				 const unsigned **pins,
				 unsigned *num_pins)
{
	struct pxa3xx_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev);
	if (selector >= info->num_grps)
		return -EINVAL;
	*pins = info->grps[selector].pins;
	*num_pins = info->grps[selector].npins;
	return 0;
}

static int wmt_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
				      struct pinctrl_gpio_range *range,
				      unsigned offset,
				      bool input)
{
	struct wmt_pinctrl_data *data = pinctrl_dev_get_drvdata(pctldev);

	wmt_set_pinmux(data, (input ? WMT_FSEL_GPIO_IN : WMT_FSEL_GPIO_OUT),
		       offset);

	return 0;
}

static int imx1_pmx_enable(struct pinctrl_dev *pctldev, unsigned selector,
			   unsigned group)
{
	struct imx1_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
	const struct imx1_pinctrl_soc_info *info = ipctl->info;
	const struct imx1_pin *pins;
	unsigned int npins;
	int i;

	/*
	 * Configure the mux mode for each pin in the group for a specific
	 * function.
	 */
	pins = info->groups[group].pins;
	npins = info->groups[group].npins;

	WARN_ON(!pins || !npins);

	dev_dbg(ipctl->dev, "enable function %s group %s\n",
		info->functions[selector].name, info->groups[group].name);

	for (i = 0; i < npins; i++) {
		unsigned int mux = pins[i].mux_id;
		unsigned int pin_id = pins[i].pin_id;
		unsigned int afunction = MX1_MUX_FUNCTION(mux);
		unsigned int gpio_in_use = MX1_MUX_GPIO(mux);
		unsigned int direction = MX1_MUX_DIR(mux);
		unsigned int gpio_oconf = MX1_MUX_OCONF(mux);
		unsigned int gpio_iconfa = MX1_MUX_ICONFA(mux);
		unsigned int gpio_iconfb = MX1_MUX_ICONFB(mux);

		dev_dbg(pctldev->dev, "%s, pin 0x%x, function %d, gpio %d, direction %d, oconf %d, iconfa %d, iconfb %d\n",
				__func__, pin_id, afunction, gpio_in_use,
				direction, gpio_oconf, gpio_iconfa,
				gpio_iconfb);

		imx1_write_bit(ipctl, pin_id, gpio_in_use, MX1_GIUS);
		imx1_write_bit(ipctl, pin_id, direction, MX1_DDIR);

		if (gpio_in_use) {
			imx1_write_2bit(ipctl, pin_id, gpio_oconf, MX1_OCR);
			imx1_write_2bit(ipctl, pin_id, gpio_iconfa,
					MX1_ICONFA);
			imx1_write_2bit(ipctl, pin_id, gpio_iconfb,
					MX1_ICONFB);
		} else {
			imx1_write_bit(ipctl, pin_id, afunction, MX1_GPR);
		}
	}

	return 0;
}

static int wmt_pmx_get_function_groups(struct pinctrl_dev *pctldev,
				       unsigned selector,
				       const char * const **groups,
				       unsigned * const num_groups)
{
	struct wmt_pinctrl_data *data = pinctrl_dev_get_drvdata(pctldev);

	/* every pin does every function */
	*groups = data->groups;
	*num_groups = data->ngroups;

	return 0;
}

static void imx1_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
		   unsigned offset)
{
	struct imx1_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);

	seq_printf(s, "GPIO %d, function %d, direction %d, oconf %d, iconfa %d, iconfb %d",
			imx1_read_bit(ipctl, offset, MX1_GIUS),
			imx1_read_bit(ipctl, offset, MX1_GPR),
			imx1_read_bit(ipctl, offset, MX1_DDIR),
			imx1_read_2bit(ipctl, offset, MX1_OCR),
			imx1_read_2bit(ipctl, offset, MX1_ICONFA),
			imx1_read_2bit(ipctl, offset, MX1_ICONFB));
}

static int sprd_pmx_get_function_groups(struct pinctrl_dev *pctldev,
					unsigned int selector,
					const char * const **groups,
					unsigned int * const num_groups)
{
	struct sprd_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
	struct sprd_pinctrl_soc_info *info = pctl->info;

	*groups = info->grp_names;
	*num_groups = info->ngroups;

	return 0;
}

static int imx_pmx_enable(struct pinctrl_dev *pctldev, unsigned selector,
			   unsigned group)
{
	struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
	const struct imx_pinctrl_soc_info *info = ipctl->info;
	const struct imx_pin_reg *pin_reg;
	const unsigned *pins, *mux;
	unsigned int npins, pin_id;
	int i;

	/*
	 * Configure the mux mode for each pin in the group for a specific
	 * function.
	 */
	pins = info->groups[group].pins;
	npins = info->groups[group].npins;
	mux = info->groups[group].mux_mode;

	WARN_ON(!pins || !npins || !mux);

	dev_dbg(ipctl->dev, "enable function %s group %s\n",
		info->functions[selector].name, info->groups[group].name);

	for (i = 0; i < npins; i++) {
		pin_id = pins[i];

		pin_reg = imx_find_pin_reg(info, pin_id, 1, mux[i]);
		if (!pin_reg)
			return -EINVAL;

		if (!pin_reg->mux_reg) {
			dev_err(ipctl->dev, "Pin(%s) does not support mux function\n",
				info->pins[pin_id].name);
			return -EINVAL;
		}

		writel(mux[i], ipctl->base + pin_reg->mux_reg);
		dev_dbg(ipctl->dev, "write: offset 0x%x val 0x%x\n",
			pin_reg->mux_reg, mux[i]);

		/* some pins also need select input setting, set it if found */
		if (pin_reg->input_reg) {
			writel(pin_reg->input_val, ipctl->base + pin_reg->input_reg);
			dev_dbg(ipctl->dev,
				"==>select_input: offset 0x%x val 0x%x\n",
				pin_reg->input_reg, pin_reg->input_val);
		}
	}

	return 0;
}