[PATCH v3] mfd: Add specific compatible strings for Qualcomm's SPMI PMIC's
From: Ivan T. Ivanov
Date: Tue Mar 17 2015 - 06:47:49 EST
Some of the PMIC's could have specific regmap configuration
tables in future, so add specific compatible strings for known
PMIC's. Also print runtime detected chip revision information.
Signed-off-by: Ivan T. Ivanov <iivanov@xxxxxxxxxx>
---
Changes since v2
* Fixed error checks from regmap_reads's.
* Reorganized pmic_spmi_id_table.
* Lower device info print level.
.../devicetree/bindings/mfd/qcom,spmi-pmic.txt | 19 +++-
drivers/mfd/qcom-spmi-pmic.c | 103 +++++++++++++++++++--
2 files changed, 111 insertions(+), 11 deletions(-)
diff --git a/Documentation/devicetree/bindings/mfd/qcom,spmi-pmic.txt b/Documentation/devicetree/bindings/mfd/qcom,spmi-pmic.txt
index 7182b88..6ac06c1 100644
--- a/Documentation/devicetree/bindings/mfd/qcom,spmi-pmic.txt
+++ b/Documentation/devicetree/bindings/mfd/qcom,spmi-pmic.txt
@@ -15,10 +15,21 @@ each. A function can consume one or more of these fixed-size register regions.
Required properties:
- compatible: Should contain one of:
- "qcom,pm8941"
- "qcom,pm8841"
- "qcom,pma8084"
- or generalized "qcom,spmi-pmic".
+ "qcom,pm8941",
+ "qcom,pm8841",
+ "qcom,pma8084",
+ "qcom,pm8019",
+ "qcom,pm8226",
+ "qcom,pm8110",
+ "qcom,pma8084",
+ "qcom,pmi8962",
+ "qcom,pmd9635",
+ "qcom,pm8994",
+ "qcom,pmi8994",
+ "qcom,pm8916",
+ "qcom,pm8004",
+ "qcom,pm8909",
+ or generalized "qcom,spmi-pmic".
- reg: Specifies the SPMI USID slave address for this device.
For more information see:
Documentation/devicetree/bindings/spmi/spmi.txt
diff --git a/drivers/mfd/qcom-spmi-pmic.c b/drivers/mfd/qcom-spmi-pmic.c
index 4b8beb2..af6ac1c 100644
--- a/drivers/mfd/qcom-spmi-pmic.c
+++ b/drivers/mfd/qcom-spmi-pmic.c
@@ -17,6 +17,100 @@
#include <linux/regmap.h>
#include <linux/of_platform.h>
+#define PMIC_REV2 0x101
+#define PMIC_REV3 0x102
+#define PMIC_REV4 0x103
+#define PMIC_TYPE 0x104
+#define PMIC_SUBTYPE 0x105
+
+#define PMIC_TYPE_VALUE 0x51
+
+#define COMMON_SUBTYPE 0x00
+#define PM8941_SUBTYPE 0x01
+#define PM8841_SUBTYPE 0x02
+#define PM8019_SUBTYPE 0x03
+#define PM8226_SUBTYPE 0x04
+#define PM8110_SUBTYPE 0x05
+#define PMA8084_SUBTYPE 0x06
+#define PMI8962_SUBTYPE 0x07
+#define PMD9635_SUBTYPE 0x08
+#define PM8994_SUBTYPE 0x09
+#define PMI8994_SUBTYPE 0x0a
+#define PM8916_SUBTYPE 0x0b
+#define PM8004_SUBTYPE 0x0c
+#define PM8909_SUBTYPE 0x0d
+
+static const struct of_device_id pmic_spmi_id_table[] = {
+ { .compatible = "qcom,spmi-pmic", .data = (void *)COMMON_SUBTYPE },
+ { .compatible = "qcom,pm8941", .data = (void *)PM8941_SUBTYPE },
+ { .compatible = "qcom,pm8841", .data = (void *)PM8841_SUBTYPE },
+ { .compatible = "qcom,pm8019", .data = (void *)PM8019_SUBTYPE },
+ { .compatible = "qcom,pm8226", .data = (void *)PM8226_SUBTYPE },
+ { .compatible = "qcom,pm8110", .data = (void *)PM8110_SUBTYPE },
+ { .compatible = "qcom,pma8084", .data = (void *)PMA8084_SUBTYPE },
+ { .compatible = "qcom,pmi8962", .data = (void *)PMI8962_SUBTYPE },
+ { .compatible = "qcom,pmd9635", .data = (void *)PMD9635_SUBTYPE },
+ { .compatible = "qcom,pm8994", .data = (void *)PM8994_SUBTYPE },
+ { .compatible = "qcom,pmi8994", .data = (void *)PMI8994_SUBTYPE },
+ { .compatible = "qcom,pm8916", .data = (void *)PM8916_SUBTYPE },
+ { .compatible = "qcom,pm8004", .data = (void *)PM8004_SUBTYPE },
+ { .compatible = "qcom,pm8909", .data = (void *)PM8909_SUBTYPE },
+ { }
+};
+
+static void pmic_spmi_show_revid(struct regmap *map, struct device *dev)
+{
+ unsigned int rev2, minor, major, type, subtype;
+ const char *name = "unknown";
+ int ret, i;
+
+ ret = regmap_read(map, PMIC_TYPE, &type);
+ if (ret < 0)
+ return;
+
+ if (type != PMIC_TYPE_VALUE)
+ return;
+
+ ret = regmap_read(map, PMIC_SUBTYPE, &subtype);
+ if (ret < 0)
+ return;
+
+ for (i = 0; i < ARRAY_SIZE(pmic_spmi_id_table); i++) {
+ if (subtype == (unsigned long)pmic_spmi_id_table[i].data)
+ break;
+ }
+
+ if (i != ARRAY_SIZE(pmic_spmi_id_table))
+ name = pmic_spmi_id_table[i].compatible;
+
+ ret = regmap_read(map, PMIC_REV2, &rev2);
+ if (ret < 0)
+ return;
+
+ ret = regmap_read(map, PMIC_REV3, &minor);
+ if (ret < 0)
+ return;
+
+ ret = regmap_read(map, PMIC_REV4, &major);
+ if (ret < 0)
+ return;
+
+ /*
+ * In early versions of PM8941 and PM8226, the major revision number
+ * started incrementing from 0 (eg 0 = v1.0, 1 = v2.0).
+ * Increment the major revision number here if the chip is an early
+ * version of PM8941 or PM8226.
+ */
+ if ((subtype == PM8941_SUBTYPE || subtype == PM8226_SUBTYPE) &&
+ major < 0x02)
+ major++;
+
+ if (subtype == PM8110_SUBTYPE)
+ minor = rev2;
+
+ dev_dbg(dev, "%x: %s v%d.%d\n", subtype, name, major, minor);
+}
+
static const struct regmap_config spmi_regmap_config = {
.reg_bits = 16,
.val_bits = 8,
@@ -33,6 +127,8 @@ static int pmic_spmi_probe(struct spmi_device *sdev)
if (IS_ERR(regmap))
return PTR_ERR(regmap);
+ pmic_spmi_show_revid(regmap, &sdev->dev);
+
return of_platform_populate(root, NULL, NULL, &sdev->dev);
}
@@ -41,13 +137,6 @@ static void pmic_spmi_remove(struct spmi_device *sdev)
of_platform_depopulate(&sdev->dev);
}
-static const struct of_device_id pmic_spmi_id_table[] = {
- { .compatible = "qcom,spmi-pmic" },
- { .compatible = "qcom,pm8941" },
- { .compatible = "qcom,pm8841" },
- { .compatible = "qcom,pma8084" },
- { }
-};
MODULE_DEVICE_TABLE(of, pmic_spmi_id_table);
static struct spmi_driver pmic_spmi_driver = {
--
1.9.1
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