[PATCH v8 3/9] mfd: qcom-spmi-pmic: read fab id on supported PMICs

[Caleb Connolly <caleb.connolly@linaro.org>]

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>
---
 drivers/mfd/qcom-spmi-pmic.c      | 7 +++++++
 include/soc/qcom/qcom-spmi-pmic.h | 1 +
 2 files changed, 8 insertions(+)

diff --git a/drivers/mfd/qcom-spmi-pmic.c b/drivers/mfd/qcom-spmi-pmic.c
index 1ef426a1513b..89e10b32fccb 100644
--- 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
 
@@ -168,6 +169,12 @@ 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 a8a77be22cfc..c821f6c6c8a8 100644
--- a/include/soc/qcom/qcom-spmi-pmic.h
+++ b/include/soc/qcom/qcom-spmi-pmic.h
@@ -50,6 +50,7 @@ struct qcom_spmi_pmic {
 	unsigned int major;
 	unsigned int minor;
 	unsigned int rev2;
+	unsigned int fab_id;
 	const char *name;
 };
 
-- 
2.35.1