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mfd: qcom-spmi-pmic: Don't access non-existing registers

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Revision ID registers are available only on devices with
Slave IDs that are even, so don't make access to unavailable
registers.

Signed-off-by: Ivan T. Ivanov <ivan.ivanov@linaro.org>
[sboyd@codeaurora.org: Consider all slave ids that are even]
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Ivan T. Ivanov 2015-11-17 16:06:44 -08:00 committed by Lee Jones
parent a5656a7080
commit 742dcd115c
1 changed files with 3 additions and 1 deletions
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4
drivers/mfd/qcom-spmi-pmic.c
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@ -127,7 +127,9 @@ static int pmic_spmi_probe(struct spmi_device *sdev)
if (IS_ERR(regmap))
return PTR_ERR(regmap);
pmic_spmi_show_revid(regmap, &sdev->dev);
/* Only the first slave id for a PMIC contains this information */
if (sdev->usid % 2 == 0)
pmic_spmi_show_revid(regmap, &sdev->dev);
return of_platform_populate(root, NULL, NULL, &sdev->dev);
}