Commit 9cf37cec authored by Matti Vaittinen's avatar Matti Vaittinen Committed by Lee Jones
Browse files

regulator: rohm-regulator: linear voltage support 



The helper for obtaining HW-state based DVS voltage levels currently only
works for regulators using linear-ranges. Extend support to regulators with
simple linear mappings and add also proper error path if pickable-ranges
regulators call this.

Signed-off-by: default avatarMatti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Acked-by: default avatarMark Brown <broonie@kernel.org>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
parent 703b288f

drivers/regulator/rohm-regulator.c

+15 −2
Original line number Diff line number Diff line
@@ -22,13 +22,26 @@ static int set_dvs_level(const struct regulator_desc *desc, 
			return ret;

		return 0;

	}



	/* If voltage is set to 0 => disable */

	if (uv == 0) {

		if (omask)

			return regmap_update_bits(regmap, oreg, omask, 0);

	}

	/* Some setups don't allow setting own voltage but do allow enabling */

	if (!mask) {

		if (omask)

			return regmap_update_bits(regmap, oreg, omask, omask);



		return -EINVAL;

	}

	for (i = 0; i < desc->n_voltages; i++) {

		/* NOTE to next hacker - Does not support pickable ranges */

		if (desc->linear_range_selectors)

			return -EINVAL;

		if (desc->n_linear_ranges)

			ret = regulator_desc_list_voltage_linear_range(desc, i);

		else

			ret = regulator_desc_list_voltage_linear(desc, i);

		if (ret < 0)

			continue;

		if (ret == uv) {