linux-kernel - [PATCH v2 2/4] regulator: rtq2208: Fix LDO to be compatible with both fixed and adjustable vout

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Date: Tue, 30 Apr 2024 17:58:25 +0800
From: Alina Yu <alina_yu@...htek.com>
To: <lgirdwood@...il.com>, <broonie@...nel.org>
CC: <linux-kernel@...r.kernel.org>, <alina_yu@...htek.com>,
	<johnny_lai@...htek.com>, <cy_huang@...htek.com>
Subject: [PATCH v2 2/4] regulator: rtq2208: Fix LDO to be compatible with both fixed and adjustable vout

In this patch, LDO's adjustable and fixed Vout settings are compatible.
The LDO Vout ability depends on the init_data->constraints.
If adjustable, the Vout can be set to either 1800mV or 3300mV.

Signed-off-by: Alina Yu <alina_yu@...htek.com>
---
 drivers/regulator/rtq2208-regulator.c | 41 +++++++++++++++++++++++++++--------
 1 file changed, 32 insertions(+), 9 deletions(-)

diff --git a/drivers/regulator/rtq2208-regulator.c b/drivers/regulator/rtq2208-regulator.c
index 63d4037..80a4d2f 100644
--- a/drivers/regulator/rtq2208-regulator.c
+++ b/drivers/regulator/rtq2208-regulator.c
@@ -220,7 +220,7 @@ static const struct regulator_ops rtq2208_regulator_buck_ops = {
 	.set_suspend_mode = rtq2208_set_suspend_mode,
 };
 
-static const struct regulator_ops rtq2208_regulator_ldo_ops = {
+static const struct regulator_ops rtq2208_regulator_ldo_fix_ops = {
 	.enable = regulator_enable_regmap,
 	.disable = regulator_disable_regmap,
 	.is_enabled = regulator_is_enabled_regmap,
@@ -229,6 +229,23 @@ static const struct regulator_ops rtq2208_regulator_ldo_ops = {
 	.set_suspend_disable = rtq2208_set_suspend_disable,
 };
 
+static const struct regulator_ops rtq2208_regulator_ldo_adj_ops = {
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+	.is_enabled = regulator_is_enabled_regmap,
+	.list_voltage = regulator_list_voltage_table,
+	.set_voltage_sel = regulator_set_voltage_sel_regmap,
+	.get_voltage_sel = regulator_get_voltage_sel_regmap,
+	.set_active_discharge = regulator_set_active_discharge_regmap,
+	.set_suspend_enable = rtq2208_set_suspend_enable,
+	.set_suspend_disable = rtq2208_set_suspend_disable,
+};
+
+static const unsigned int rtq2208_ldo_volt_table[] = {
+	1800000,
+	3300000,
+};
+
 static unsigned int rtq2208_of_map_mode(unsigned int mode)
 {
 	switch (mode) {
@@ -323,12 +340,12 @@ static irqreturn_t rtq2208_irq_handler(int irqno, void *devid)
 	return IRQ_HANDLED;
 }
 
-static int rtq2208_of_get_fixed_voltage(struct device *dev,
+static int rtq2208_of_get_ldo_dvs_ability(struct device *dev,
 					struct of_regulator_match *rtq2208_ldo_match, int n_fixed)
 {
 	struct device_node *np;
 	struct of_regulator_match *match;
-	struct rtq2208_regulator_desc *rdesc;
+	struct regulator_desc *desc;
 	struct regulator_init_data *init_data;
 	int ret, i;
 
@@ -349,13 +366,20 @@ static int rtq2208_of_get_fixed_voltage(struct device *dev,
 	for (i = 0; i < n_fixed; i++) {
 		match = rtq2208_ldo_match + i;
 		init_data = match->init_data;
-		rdesc = (struct rtq2208_regulator_desc *)match->driver_data;
+		desc = (struct regulator_desc *)match->desc;
 
-		if (!init_data || !rdesc)
+		if (!init_data || !desc)
 			continue;
 
-		if (init_data->constraints.min_uV == init_data->constraints.max_uV)
-			rdesc->desc.fixed_uV = init_data->constraints.min_uV;
+		if (init_data->constraints.min_uV == init_data->constraints.max_uV) {
+			desc->n_voltages = 1;
+			desc->fixed_uV = init_data->constraints.min_uV;
+			desc->ops = &rtq2208_regulator_ldo_fix_ops;
+		} else {
+			desc->n_voltages = ARRAY_SIZE(rtq2208_ldo_volt_table);
+			desc->volt_table = rtq2208_ldo_volt_table;
+			desc->ops = &rtq2208_regulator_ldo_adj_ops;
+		}
 	}
 
 	return 0;
@@ -482,8 +506,7 @@ static int rtq2208_parse_regulator_dt_data(int n_regulator, const unsigned int *
 			rtq2208_ldo_match[idx - RTQ2208_LDO2].desc = &rdesc[i]->desc;
 	}
 
-	/* init ldo fixed_uV */
-	ret = rtq2208_of_get_fixed_voltage(dev, rtq2208_ldo_match, ldo_idx);
+	ret = rtq2208_of_get_ldo_dvs_ability(dev, rtq2208_ldo_match, ldo_idx);
 	if (ret)
 		return dev_err_probe(dev, ret, "Failed to get ldo fixed_uV\n");
 
-- 
2.7.4