mfd: qcom-spmi-pmic: read fab id on supported PMICs

The PMI8998 and PM660 expose the fab_id, this is needed by drivers like
the RRADC to calibrate ADC values.

Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Tested-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20220429220904.137297-4-caleb.connolly@linaro.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/mfd/qcom-spmi-pmic.c b/drivers/mfd/qcom-spmi-pmic.c
index 0f1f60e..00003a8 100644 (file)
--- a/drivers/mfd/qcom-spmi-pmic.c
+++ b/drivers/mfd/qcom-spmi-pmic.c
@@ -19,6 +19,7 @@
 #define PMIC_REV4              0x103
 #define PMIC_TYPE              0x104
 #define PMIC_SUBTYPE           0x105
+#define PMIC_FAB_ID            0x1f2
 
 #define PMIC_TYPE_VALUE                0x51
 
@@ -157,6 +158,12 @@ static int pmic_spmi_load_revid(struct regmap *map, struct device *dev,
        if (ret < 0)
                return ret;
 
+       if (pmic->subtype == PMI8998_SUBTYPE || pmic->subtype == PM660_SUBTYPE) {
+               ret = regmap_read(map, PMIC_FAB_ID, &pmic->fab_id);
+               if (ret < 0)
+                       return ret;
+       }
+
        /*
         * In early versions of PM8941 and PM8226, the major revision number
         * started incrementing from 0 (eg 0 = v1.0, 1 = v2.0).

diff --git a/include/soc/qcom/qcom-spmi-pmic.h b/include/soc/qcom/qcom-spmi-pmic.h
index 5894da3..72398ff 100644 (file)
--- a/include/soc/qcom/qcom-spmi-pmic.h
+++ b/include/soc/qcom/qcom-spmi-pmic.h
@@ -52,6 +52,7 @@ struct qcom_spmi_pmic {
        unsigned int major;
        unsigned int minor;
        unsigned int rev2;
+       unsigned int fab_id;
        const char *name;
 };