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From:   Marco Felsch <m.felsch@pengutronix.de>
To:     support.opensource@diasemi.com, lee.jones@linaro.org,
        robh+dt@kernel.org, linus.walleij@linaro.org,
        bgolaszewski@baylibre.com, joel@jms.id.au, andrew@aj.id.au,
        lgirdwood@gmail.com, broonie@kernel.org
Cc:     devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-gpio@vger.kernel.org, linux-aspeed@lists.ozlabs.org,
        linux-arm-kernel@lists.infradead.org, kernel@pengutronix.de
Subject: [PATCH v3 6/6] regulator: da9062: add gpio based regulator dis-/enable support
Date:   Fri, 29 Nov 2019 18:25:37 +0100
Message-Id: <20191129172537.31410-7-m.felsch@pengutronix.de>
In-Reply-To: <20191129172537.31410-1-m.felsch@pengutronix.de>
References: <20191129172537.31410-1-m.felsch@pengutronix.de>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Each regulator can be enabeld/disabled by the internal pmic state
machine or by a gpio input signal. Typically the OTP configures the
regulators to be enabled/disabled on a specific sequence number which is
most the time fine. Sometimes we need to reconfigure that due to a PCB
bug. This patch adds the support to disable/enable the regulator based
on a gpio input signal.

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
---
v3:
- add comment on reg_field
- append ena_gpi to da9062_regulator_info instead of insert it in the
  middle
---
 drivers/regulator/da9062-regulator.c | 88 +++++++++++++++++++++++++++-
 1 file changed, 86 insertions(+), 2 deletions(-)

diff --git a/drivers/regulator/da9062-regulator.c b/drivers/regulator/da9062-regulator.c
index 6117e631236b..79b08029282a 100644
--- a/drivers/regulator/da9062-regulator.c
+++ b/drivers/regulator/da9062-regulator.c
@@ -62,8 +62,13 @@ struct da9062_regulator_info {
 	 * vsel_gpi:
 	 * The input port which is used by a regulator to select between
 	 * voltage-a/b settings.
+	 *
+	 * ena_gpi:
+	 * The input port which is used by a regulator to en-/disable its
+	 * output.
 	 */
 	struct reg_field vsel_gpi;
+	struct reg_field ena_gpi;
 };
 
 /* Single regulator settings */
@@ -78,6 +83,7 @@ struct da9062_regulator {
 	struct regmap_field			*sleep;
 	struct regmap_field			*suspend_sleep;
 	struct regmap_field			*vsel_gpi;
+	struct regmap_field			*ena_gpi;
 };
 
 /* Encapsulates all information for the regulators driver */
@@ -423,7 +429,10 @@ static int da9062_config_gpi(struct device_node *np,
 		goto free;
 	}
 
-	ret = regmap_field_write(regl->vsel_gpi, nr);
+	if (!strncmp(gpi_id, "ena", 3))
+		ret = regmap_field_write(regl->ena_gpi, nr);
+	else
+		ret = regmap_field_write(regl->vsel_gpi, nr);
 
 free:
 	kfree(prop);
@@ -436,7 +445,13 @@ static int da9062_parse_dt(struct device_node *np,
 			   const struct regulator_desc *desc,
 			   struct regulator_config *cfg)
 {
-	return da9062_config_gpi(np, desc, cfg, "vsel");
+	int error;
+
+	error = da9062_config_gpi(np, desc, cfg, "vsel");
+	if (error)
+		return error;
+
+	return da9062_config_gpi(np, desc, cfg, "ena");
 }
 
 /* DA9061 Regulator information */
@@ -481,6 +496,10 @@ static const struct da9062_regulator_info local_da9061_regulator_info[] = {
 			__builtin_ffs((int)DA9062AA_VBUCK1_GPI_MASK) - 1,
 			sizeof(unsigned int) * 8 -
 			__builtin_clz(DA9062AA_VBUCK1_GPI_MASK) - 1),
+		.ena_gpi = REG_FIELD(DA9062AA_BUCK1_CONT,
+			__builtin_ffs((int)DA9062AA_BUCK1_GPI_MASK) - 1,
+			sizeof(unsigned int) * 8 -
+			__builtin_clz(DA9062AA_BUCK1_GPI_MASK) - 1),
 	},
 	{
 		.desc.id = DA9061_ID_BUCK2,
@@ -522,6 +541,10 @@ static const struct da9062_regulator_info local_da9061_regulator_info[] = {
 			__builtin_ffs((int)DA9062AA_VBUCK3_GPI_MASK) - 1,
 			sizeof(unsigned int) * 8 -
 			__builtin_clz(DA9062AA_VBUCK3_GPI_MASK) - 1),
+		.ena_gpi = REG_FIELD(DA9062AA_BUCK3_CONT,
+			__builtin_ffs((int)DA9062AA_BUCK3_GPI_MASK) - 1,
+			sizeof(unsigned int) * 8 -
+			__builtin_clz(DA9062AA_BUCK3_GPI_MASK) - 1),
 	},
 	{
 		.desc.id = DA9061_ID_BUCK3,
@@ -563,6 +586,10 @@ static const struct da9062_regulator_info local_da9061_regulator_info[] = {
 			__builtin_ffs((int)DA9062AA_VBUCK4_GPI_MASK) - 1,
 			sizeof(unsigned int) * 8 -
 			__builtin_clz(DA9062AA_VBUCK4_GPI_MASK) - 1),
+		.ena_gpi = REG_FIELD(DA9062AA_BUCK4_CONT,
+			__builtin_ffs((int)DA9062AA_BUCK4_GPI_MASK) - 1,
+			sizeof(unsigned int) * 8 -
+			__builtin_clz(DA9062AA_BUCK4_GPI_MASK) - 1),
 	},
 	{
 		.desc.id = DA9061_ID_LDO1,
@@ -597,6 +624,10 @@ static const struct da9062_regulator_info local_da9061_regulator_info[] = {
 			__builtin_ffs((int)DA9062AA_VLDO1_GPI_MASK) - 1,
 			sizeof(unsigned int) * 8 -
 			__builtin_clz(DA9062AA_VLDO1_GPI_MASK) - 1),
+		.ena_gpi = REG_FIELD(DA9062AA_LDO1_CONT,
+			__builtin_ffs((int)DA9062AA_LDO1_GPI_MASK) - 1,
+			sizeof(unsigned int) * 8 -
+			__builtin_clz(DA9062AA_LDO1_GPI_MASK) - 1),
 		.oc_event = REG_FIELD(DA9062AA_STATUS_D,
 			__builtin_ffs((int)DA9062AA_LDO1_ILIM_MASK) - 1,
 			sizeof(unsigned int) * 8 -
@@ -635,6 +666,10 @@ static const struct da9062_regulator_info local_da9061_regulator_info[] = {
 			__builtin_ffs((int)DA9062AA_VLDO2_GPI_MASK) - 1,
 			sizeof(unsigned int) * 8 -
 			__builtin_clz(DA9062AA_VLDO2_GPI_MASK) - 1),
+		.ena_gpi = REG_FIELD(DA9062AA_LDO2_CONT,
+			__builtin_ffs((int)DA9062AA_LDO2_GPI_MASK) - 1,
+			sizeof(unsigned int) * 8 -
+			__builtin_clz(DA9062AA_LDO2_GPI_MASK) - 1),
 		.oc_event = REG_FIELD(DA9062AA_STATUS_D,
 			__builtin_ffs((int)DA9062AA_LDO2_ILIM_MASK) - 1,
 			sizeof(unsigned int) * 8 -
@@ -673,6 +708,10 @@ static const struct da9062_regulator_info local_da9061_regulator_info[] = {
 			__builtin_ffs((int)DA9062AA_VLDO3_GPI_MASK) - 1,
 			sizeof(unsigned int) * 8 -
 			__builtin_clz(DA9062AA_VLDO3_GPI_MASK) - 1),
+		.ena_gpi = REG_FIELD(DA9062AA_LDO3_CONT,
+			__builtin_ffs((int)DA9062AA_LDO3_GPI_MASK) - 1,
+			sizeof(unsigned int) * 8 -
+			__builtin_clz(DA9062AA_LDO3_GPI_MASK) - 1),
 		.oc_event = REG_FIELD(DA9062AA_STATUS_D,
 			__builtin_ffs((int)DA9062AA_LDO3_ILIM_MASK) - 1,
 			sizeof(unsigned int) * 8 -
@@ -711,6 +750,10 @@ static const struct da9062_regulator_info local_da9061_regulator_info[] = {
 			__builtin_ffs((int)DA9062AA_VLDO4_GPI_MASK) - 1,
 			sizeof(unsigned int) * 8 -
 			__builtin_clz(DA9062AA_VLDO4_GPI_MASK) - 1),
+		.ena_gpi = REG_FIELD(DA9062AA_LDO4_CONT,
+			__builtin_ffs((int)DA9062AA_LDO4_GPI_MASK) - 1,
+			sizeof(unsigned int) * 8 -
+			__builtin_clz(DA9062AA_LDO4_GPI_MASK) - 1),
 		.oc_event = REG_FIELD(DA9062AA_STATUS_D,
 			__builtin_ffs((int)DA9062AA_LDO4_ILIM_MASK) - 1,
 			sizeof(unsigned int) * 8 -
@@ -760,6 +803,10 @@ static const struct da9062_regulator_info local_da9062_regulator_info[] = {
 			__builtin_ffs((int)DA9062AA_VBUCK1_GPI_MASK) - 1,
 			sizeof(unsigned int) * 8 -
 			__builtin_clz(DA9062AA_VBUCK1_GPI_MASK) - 1),
+		.ena_gpi = REG_FIELD(DA9062AA_BUCK1_CONT,
+			__builtin_ffs((int)DA9062AA_BUCK1_GPI_MASK) - 1,
+			sizeof(unsigned int) * 8 -
+			__builtin_clz(DA9062AA_BUCK1_GPI_MASK) - 1),
 	},
 	{
 		.desc.id = DA9062_ID_BUCK2,
@@ -801,6 +848,10 @@ static const struct da9062_regulator_info local_da9062_regulator_info[] = {
 			__builtin_ffs((int)DA9062AA_VBUCK2_GPI_MASK) - 1,
 			sizeof(unsigned int) * 8 -
 			__builtin_clz(DA9062AA_VBUCK2_GPI_MASK) - 1),
+		.ena_gpi = REG_FIELD(DA9062AA_BUCK2_CONT,
+			__builtin_ffs((int)DA9062AA_BUCK2_GPI_MASK) - 1,
+			sizeof(unsigned int) * 8 -
+			__builtin_clz(DA9062AA_BUCK2_GPI_MASK) - 1),
 	},
 	{
 		.desc.id = DA9062_ID_BUCK3,
@@ -842,6 +893,10 @@ static const struct da9062_regulator_info local_da9062_regulator_info[] = {
 			__builtin_ffs((int)DA9062AA_VBUCK3_GPI_MASK) - 1,
 			sizeof(unsigned int) * 8 -
 			__builtin_clz(DA9062AA_VBUCK3_GPI_MASK) - 1),
+		.ena_gpi = REG_FIELD(DA9062AA_BUCK3_CONT,
+			__builtin_ffs((int)DA9062AA_BUCK3_GPI_MASK) - 1,
+			sizeof(unsigned int) * 8 -
+			__builtin_clz(DA9062AA_BUCK3_GPI_MASK) - 1),
 	},
 	{
 		.desc.id = DA9062_ID_BUCK4,
@@ -883,6 +938,10 @@ static const struct da9062_regulator_info local_da9062_regulator_info[] = {
 			__builtin_ffs((int)DA9062AA_VBUCK4_GPI_MASK) - 1,
 			sizeof(unsigned int) * 8 -
 			__builtin_clz(DA9062AA_VBUCK4_GPI_MASK) - 1),
+		.ena_gpi = REG_FIELD(DA9062AA_BUCK4_CONT,
+			__builtin_ffs((int)DA9062AA_BUCK4_GPI_MASK) - 1,
+			sizeof(unsigned int) * 8 -
+			__builtin_clz(DA9062AA_BUCK4_GPI_MASK) - 1),
 	},
 	{
 		.desc.id = DA9062_ID_LDO1,
@@ -917,6 +976,10 @@ static const struct da9062_regulator_info local_da9062_regulator_info[] = {
 			__builtin_ffs((int)DA9062AA_VLDO1_GPI_MASK) - 1,
 			sizeof(unsigned int) * 8 -
 			__builtin_clz(DA9062AA_VLDO1_GPI_MASK) - 1),
+		.ena_gpi = REG_FIELD(DA9062AA_LDO1_CONT,
+			__builtin_ffs((int)DA9062AA_LDO1_GPI_MASK) - 1,
+			sizeof(unsigned int) * 8 -
+			__builtin_clz(DA9062AA_LDO1_GPI_MASK) - 1),
 		.oc_event = REG_FIELD(DA9062AA_STATUS_D,
 			__builtin_ffs((int)DA9062AA_LDO1_ILIM_MASK) - 1,
 			sizeof(unsigned int) * 8 -
@@ -955,6 +1018,10 @@ static const struct da9062_regulator_info local_da9062_regulator_info[] = {
 			__builtin_ffs((int)DA9062AA_VLDO2_GPI_MASK) - 1,
 			sizeof(unsigned int) * 8 -
 			__builtin_clz(DA9062AA_VLDO2_GPI_MASK) - 1),
+		.ena_gpi = REG_FIELD(DA9062AA_LDO2_CONT,
+			__builtin_ffs((int)DA9062AA_LDO2_GPI_MASK) - 1,
+			sizeof(unsigned int) * 8 -
+			__builtin_clz(DA9062AA_LDO2_GPI_MASK) - 1),
 		.oc_event = REG_FIELD(DA9062AA_STATUS_D,
 			__builtin_ffs((int)DA9062AA_LDO2_ILIM_MASK) - 1,
 			sizeof(unsigned int) * 8 -
@@ -993,6 +1060,10 @@ static const struct da9062_regulator_info local_da9062_regulator_info[] = {
 			__builtin_ffs((int)DA9062AA_VLDO3_GPI_MASK) - 1,
 			sizeof(unsigned int) * 8 -
 			__builtin_clz(DA9062AA_VLDO3_GPI_MASK) - 1),
+		.ena_gpi = REG_FIELD(DA9062AA_LDO3_CONT,
+			__builtin_ffs((int)DA9062AA_LDO3_GPI_MASK) - 1,
+			sizeof(unsigned int) * 8 -
+			__builtin_clz(DA9062AA_LDO3_GPI_MASK) - 1),
 		.oc_event = REG_FIELD(DA9062AA_STATUS_D,
 			__builtin_ffs((int)DA9062AA_LDO3_ILIM_MASK) - 1,
 			sizeof(unsigned int) * 8 -
@@ -1031,6 +1102,10 @@ static const struct da9062_regulator_info local_da9062_regulator_info[] = {
 			__builtin_ffs((int)DA9062AA_VLDO4_GPI_MASK) - 1,
 			sizeof(unsigned int) * 8 -
 			__builtin_clz(DA9062AA_VLDO4_GPI_MASK) - 1),
+		.ena_gpi = REG_FIELD(DA9062AA_LDO4_CONT,
+			__builtin_ffs((int)DA9062AA_LDO4_GPI_MASK) - 1,
+			sizeof(unsigned int) * 8 -
+			__builtin_clz(DA9062AA_LDO4_GPI_MASK) - 1),
 		.oc_event = REG_FIELD(DA9062AA_STATUS_D,
 			__builtin_ffs((int)DA9062AA_LDO4_ILIM_MASK) - 1,
 			sizeof(unsigned int) * 8 -
@@ -1160,6 +1235,15 @@ static int da9062_regulator_probe(struct platform_device *pdev)
 				return PTR_ERR(regl->vsel_gpi);
 		}
 
+		if (regl->info->ena_gpi.reg) {
+			regl->ena_gpi = devm_regmap_field_alloc(
+					&pdev->dev,
+					chip->regmap,
+					regl->info->ena_gpi);
+			if (IS_ERR(regl->ena_gpi))
+				return PTR_ERR(regl->ena_gpi);
+		}
+
 		/* Register regulator */
 		memset(&config, 0, sizeof(config));
 		config.dev = chip->dev;
-- 
2.20.1