linux-kernel - [PATCH 1/5] regulator: pca9450: add enable

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Message-Id: <20241205-pca9450-v1-1-aab448b74e78@nxp.com>
Date: Thu, 05 Dec 2024 11:51:09 -0500
From: Frank Li <Frank.Li@....com>
To: Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Robin Gong <yibin.gong@....com>, 
 Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>
Cc: linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, 
 imx@...ts.linux.dev, joy.zou@....com, linux-arm-kernel@...ts.infradead.org, 
 Frank Li <Frank.Li@....com>
Subject: [PATCH 1/5] regulator: pca9450: add enable_value for all bucks

From: Robin Gong <yibin.gong@....com>

Set 'enable_value' in the regulator descriptor for different bucks to
manage their enable modes:

- 00b: OFF
- 01b: ON when PMIC_ON_REQ = H
- 10b: ON when PMIC_ON_REQ = H && PMIC_STBY_REQ = L
- 11b: Always ON

Ensure appropriate behavior based on the intended design. For example:
- Buck2, designed for vddarm, should be set to '10b' (ON when
PMIC_STBY_REQ = L) since it can be off when `PMIC_STBY_REQ = H` after the
kernel enters suspend.
- Other bucks remain '01b' (ON when PMIC_ON_REQ = H), matching the default
setting. This avoids the need to re-enable them during kernel boot as they
are already enabled after PMIC initialization.

Signed-off-by: Robin Gong <yibin.gong@....com>
Signed-off-by: Frank Li <Frank.Li@....com>
---
 drivers/regulator/pca9450-regulator.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/regulator/pca9450-regulator.c b/drivers/regulator/pca9450-regulator.c
index 9714afe347dcc..caeeed433165c 100644
--- a/drivers/regulator/pca9450-regulator.c
+++ b/drivers/regulator/pca9450-regulator.c
@@ -247,6 +247,7 @@ static const struct pca9450_regulator_desc pca9450a_regulators[] = {
 			.ramp_mask = BUCK1_RAMP_MASK,
 			.ramp_delay_table = pca9450_dvs_buck_ramp_table,
 			.n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
+			.enable_val = BUCK_ENMODE_ONREQ,
 			.owner = THIS_MODULE,
 			.of_parse_cb = pca9450_set_dvs_levels,
 		},
@@ -272,6 +273,7 @@ static const struct pca9450_regulator_desc pca9450a_regulators[] = {
 			.vsel_mask = BUCK2OUT_DVS0_MASK,
 			.enable_reg = PCA9450_REG_BUCK2CTRL,
 			.enable_mask = BUCK2_ENMODE_MASK,
+			.enable_val = BUCK_ENMODE_ONREQ_STBYREQ,
 			.ramp_reg = PCA9450_REG_BUCK2CTRL,
 			.ramp_mask = BUCK2_RAMP_MASK,
 			.ramp_delay_table = pca9450_dvs_buck_ramp_table,
@@ -301,6 +303,7 @@ static const struct pca9450_regulator_desc pca9450a_regulators[] = {
 			.vsel_mask = BUCK3OUT_DVS0_MASK,
 			.enable_reg = PCA9450_REG_BUCK3CTRL,
 			.enable_mask = BUCK3_ENMODE_MASK,
+			.enable_val = BUCK_ENMODE_ONREQ,
 			.ramp_reg = PCA9450_REG_BUCK3CTRL,
 			.ramp_mask = BUCK3_RAMP_MASK,
 			.ramp_delay_table = pca9450_dvs_buck_ramp_table,
@@ -330,6 +333,7 @@ static const struct pca9450_regulator_desc pca9450a_regulators[] = {
 			.vsel_mask = BUCK4OUT_MASK,
 			.enable_reg = PCA9450_REG_BUCK4CTRL,
 			.enable_mask = BUCK4_ENMODE_MASK,
+			.enable_val = BUCK_ENMODE_ONREQ,
 			.owner = THIS_MODULE,
 		},
 	},
@@ -348,6 +352,7 @@ static const struct pca9450_regulator_desc pca9450a_regulators[] = {
 			.vsel_mask = BUCK5OUT_MASK,
 			.enable_reg = PCA9450_REG_BUCK5CTRL,
 			.enable_mask = BUCK5_ENMODE_MASK,
+			.enable_val = BUCK_ENMODE_ONREQ,
 			.owner = THIS_MODULE,
 		},
 	},
@@ -366,6 +371,7 @@ static const struct pca9450_regulator_desc pca9450a_regulators[] = {
 			.vsel_mask = BUCK6OUT_MASK,
 			.enable_reg = PCA9450_REG_BUCK6CTRL,
 			.enable_mask = BUCK6_ENMODE_MASK,
+			.enable_val = BUCK_ENMODE_ONREQ,
 			.owner = THIS_MODULE,
 		},
 	},
@@ -481,6 +487,7 @@ static const struct pca9450_regulator_desc pca9450bc_regulators[] = {
 			.vsel_mask = BUCK1OUT_DVS0_MASK,
 			.enable_reg = PCA9450_REG_BUCK1CTRL,
 			.enable_mask = BUCK1_ENMODE_MASK,
+			.enable_val = BUCK_ENMODE_ONREQ,
 			.ramp_reg = PCA9450_REG_BUCK1CTRL,
 			.ramp_mask = BUCK1_RAMP_MASK,
 			.ramp_delay_table = pca9450_dvs_buck_ramp_table,
@@ -510,6 +517,7 @@ static const struct pca9450_regulator_desc pca9450bc_regulators[] = {
 			.vsel_mask = BUCK2OUT_DVS0_MASK,
 			.enable_reg = PCA9450_REG_BUCK2CTRL,
 			.enable_mask = BUCK2_ENMODE_MASK,
+			.enable_val = BUCK_ENMODE_ONREQ_STBYREQ,
 			.ramp_reg = PCA9450_REG_BUCK2CTRL,
 			.ramp_mask = BUCK2_RAMP_MASK,
 			.ramp_delay_table = pca9450_dvs_buck_ramp_table,
@@ -539,6 +547,7 @@ static const struct pca9450_regulator_desc pca9450bc_regulators[] = {
 			.vsel_mask = BUCK4OUT_MASK,
 			.enable_reg = PCA9450_REG_BUCK4CTRL,
 			.enable_mask = BUCK4_ENMODE_MASK,
+			.enable_val = BUCK_ENMODE_ONREQ,
 			.owner = THIS_MODULE,
 		},
 	},
@@ -557,6 +566,7 @@ static const struct pca9450_regulator_desc pca9450bc_regulators[] = {
 			.vsel_mask = BUCK5OUT_MASK,
 			.enable_reg = PCA9450_REG_BUCK5CTRL,
 			.enable_mask = BUCK5_ENMODE_MASK,
+			.enable_val = BUCK_ENMODE_ONREQ,
 			.owner = THIS_MODULE,
 		},
 	},
@@ -575,6 +585,7 @@ static const struct pca9450_regulator_desc pca9450bc_regulators[] = {
 			.vsel_mask = BUCK6OUT_MASK,
 			.enable_reg = PCA9450_REG_BUCK6CTRL,
 			.enable_mask = BUCK6_ENMODE_MASK,
+			.enable_val = BUCK_ENMODE_ONREQ,
 			.owner = THIS_MODULE,
 		},
 	},

-- 
2.34.1