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Message-Id: <1425464365-3291-1-git-send-email-iivanov@mm-sol.com>
Date: Wed, 4 Mar 2015 12:19:25 +0200
From: "Ivan T. Ivanov" <iivanov@...sol.com>
To: Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
Mark Rutland <mark.rutland@....com>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Kumar Gala <galak@...eaurora.org>,
Lee Jones <lee.jones@...aro.org>
Cc: Samuel Ortiz <sameo@...ux.intel.com>,
Stanimir Varbanov <svarbanov@...sol.com>,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-msm@...r.kernel.org
Subject: [PATCH v2] mfd: Add specific compatible strings for Qualcomm's SPMI PMIC's
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@...sol.com>
---
Changes since first version of this patch[1]:
- Drop run compatible property update. Method did't work for modules.
- Use more compact way to print detected chip name and revision.
- Properly check regmap_read error codes.
- Fix devicetree bindings description.
- Rename patch description.
[1] https://lkml.org/lkml/2014/11/4/425
.../devicetree/bindings/mfd/qcom,spmi-pmic.txt | 19 ++++-
drivers/mfd/qcom-spmi-pmic.c | 98 ++++++++++++++++++++--
2 files changed, 106 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..a1af4e5 100644
--- a/drivers/mfd/qcom-spmi-pmic.c
+++ b/drivers/mfd/qcom-spmi-pmic.c
@@ -17,6 +17,95 @@
#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[] = {
+ [COMMON_SUBTYPE] = { .compatible = "qcom,spmi-pmic" },
+ [PM8941_SUBTYPE] = { .compatible = "qcom,pm8941" },
+ [PM8841_SUBTYPE] = { .compatible = "qcom,pm8841" },
+ [PM8019_SUBTYPE] = { .compatible = "qcom,pm8019" },
+ [PM8226_SUBTYPE] = { .compatible = "qcom,pm8226" },
+ [PM8110_SUBTYPE] = { .compatible = "qcom,pm8110" },
+ [PMA8084_SUBTYPE] = { .compatible = "qcom,pma8084" },
+ [PMI8962_SUBTYPE] = { .compatible = "qcom,pmi8962" },
+ [PMD9635_SUBTYPE] = { .compatible = "qcom,pmd9635" },
+ [PM8994_SUBTYPE] = { .compatible = "qcom,pm8994" },
+ [PMI8994_SUBTYPE] = { .compatible = "qcom,pmi8994" },
+ [PM8916_SUBTYPE] = { .compatible = "qcom,pm8916" },
+ [PM8004_SUBTYPE] = { .compatible = "qcom,pm8004" },
+ [PM8909_SUBTYPE] = { .compatible = "qcom,pm8909" },
+ { }
+};
+
+static void pmic_spmi_show_revid(struct regmap *map, struct device *dev)
+{
+ unsigned int rev2, minor, major, type, subtype;
+ int ret;
+
+ 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;
+
+ if (subtype > ARRAY_SIZE(pmic_spmi_id_table))
+ return;
+
+ rev2 = regmap_read(map, PMIC_REV2, &rev2);
+ if (rev2 < 0)
+ return;
+
+ minor = regmap_read(map, PMIC_REV3, &minor);
+ if (minor < 0)
+ return;
+
+ major = regmap_read(map, PMIC_REV4, &major);
+ if (major < 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_info(dev, "%s-v%d.%d detected\n",
+ pmic_spmi_id_table[subtype].compatible, major, minor);
+}
+
static const struct regmap_config spmi_regmap_config = {
.reg_bits = 16,
.val_bits = 8,
@@ -33,6 +122,8 @@ 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 +132,6 @@ 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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