linux-kernel - [PATCH] regulator: tps51632: Ensure [base|max]_voltage

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Date:	Fri, 30 Nov 2012 16:52:49 +0800
From:	Axel Lin <axel.lin@...ics.com>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Cc:	Laxman Dewangan <ldewangan@...dia.com>, Liam Girdwood <lrg@...com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] regulator: tps51632: Ensure [base|max]_voltage_uV pdata
 settings are valid

If pdata->base_voltage_uV is missing or the settings of pdata->base_voltage_uV
and pdata->max_voltage_uV are out of range, TPS51632_VOLT_VSEL macro
returns wrong vsel.

Thus add checking [base|max]_voltage_uV pdata settings in probe.

Signed-off-by: Axel Lin <axel.lin@...ics.com>
---
 drivers/regulator/tps51632-regulator.c |   15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/regulator/tps51632-regulator.c b/drivers/regulator/tps51632-regulator.c
index 523b1e5..ab21133 100644
--- a/drivers/regulator/tps51632-regulator.c
+++ b/drivers/regulator/tps51632-regulator.c
@@ -236,6 +236,21 @@ static int tps51632_probe(struct i2c_client *client,
 		return -EINVAL;
 	}
 
+	if (pdata->enable_pwm_dvfs) {
+		if ((pdata->base_voltage_uV < TPS51632_MIN_VOLATGE) ||
+		    (pdata->base_voltage_uV > TPS51632_MAX_VOLATGE)) {
+			dev_err(&client->dev, "Invalid base_voltage_uV setting\n");
+			return -EINVAL;
+		}
+
+		if ((pdata->max_voltage_uV) &&
+		    ((pdata->max_voltage_uV < TPS51632_MIN_VOLATGE) ||
+		     (pdata->max_voltage_uV > TPS51632_MAX_VOLATGE))) {
+			dev_err(&client->dev, "Invalid max_voltage_uV setting\n");
+			return -EINVAL;
+		}
+	}
+
 	tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
 	if (!tps) {
 		dev_err(&client->dev, "Memory allocation failed\n");
-- 
1.7.9.5



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