mfd: qcom-spmi-pmic: Don't access non-existing registers
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>
diff --git a/drivers/mfd/qcom-spmi-pmic.c b/drivers/mfd/qcom-spmi-pmic.c
index af6ac1c..8653e8b 100644
--- a/drivers/mfd/qcom-spmi-pmic.c
+++ b/drivers/mfd/qcom-spmi-pmic.c
@@ -127,7 +127,9 @@
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);
}