regulator: rtmv20: Fix .set_current_limit/.get_current_limit callbacks

commit 86ab21cc39e6b99b7065ab9008c90bec5dec535a upstream.

Current code does not set .curr_table and .n_linear_ranges settings,
so it cannot use the regulator_get/set_current_limit_regmap helpers.
If we setup the curr_table, it will has 200 entries.
Implement customized .set_current_limit/.get_current_limit callbacks
instead.

Fixes: b8c054a5eaf0 ("regulator: rtmv20: Adds support for Richtek RTMV20 load switch regulator")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Reviewed-by: ChiYuan Huang <cy_huang@richtek.com>
Link: https://lore.kernel.org/r/20210530124101.477727-1-axel.lin@ingics.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/regulator/rtmv20-regulator.c b/drivers/regulator/rtmv20-regulator.c
index 852fb2596ffdadf42a199a2736c90a8bbacbeb72..5adc552dffd58bb4fbc18eecbb164812d414fa78 100644 (file)
--- a/drivers/regulator/rtmv20-regulator.c
+++ b/drivers/regulator/rtmv20-regulator.c
@@ -103,9 +103,47 @@ static int rtmv20_lsw_disable(struct regulator_dev *rdev)
        return 0;
 }
 
+static int rtmv20_lsw_set_current_limit(struct regulator_dev *rdev, int min_uA,
+                                       int max_uA)
+{
+       int sel;
+
+       if (min_uA > RTMV20_LSW_MAXUA || max_uA < RTMV20_LSW_MINUA)
+               return -EINVAL;
+
+       if (max_uA > RTMV20_LSW_MAXUA)
+               max_uA = RTMV20_LSW_MAXUA;
+
+       sel = (max_uA - RTMV20_LSW_MINUA) / RTMV20_LSW_STEPUA;
+
+       /* Ensure the selected setting is still in range */
+       if ((sel * RTMV20_LSW_STEPUA + RTMV20_LSW_MINUA) < min_uA)
+               return -EINVAL;
+
+       sel <<= ffs(rdev->desc->csel_mask) - 1;
+
+       return regmap_update_bits(rdev->regmap, rdev->desc->csel_reg,
+                                 rdev->desc->csel_mask, sel);
+}
+
+static int rtmv20_lsw_get_current_limit(struct regulator_dev *rdev)
+{
+       unsigned int val;
+       int ret;
+
+       ret = regmap_read(rdev->regmap, rdev->desc->csel_reg, &val);
+       if (ret)
+               return ret;
+
+       val &= rdev->desc->csel_mask;
+       val >>= ffs(rdev->desc->csel_mask) - 1;
+
+       return val * RTMV20_LSW_STEPUA + RTMV20_LSW_MINUA;
+}
+
 static const struct regulator_ops rtmv20_regulator_ops = {
-       .set_current_limit = regulator_set_current_limit_regmap,
-       .get_current_limit = regulator_get_current_limit_regmap,
+       .set_current_limit = rtmv20_lsw_set_current_limit,
+       .get_current_limit = rtmv20_lsw_get_current_limit,
        .enable = rtmv20_lsw_enable,
        .disable = rtmv20_lsw_disable,
        .is_enabled = regulator_is_enabled_regmap,