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 af6ac1c4b45c6817e88ddfa965cf68c114e6aeea..8653e8b9bb4fc29359a1b84e7dd676f7cf4b2d9b 100644 (file)
--- a/drivers/mfd/qcom-spmi-pmic.c
+++ b/drivers/mfd/qcom-spmi-pmic.c
@@ -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);
 }