* Copyright (c) 2014, The Linux Foundation. All rights reserved.
*/
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/gfp.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/spmi.h>
+#include <linux/types.h>
#include <linux/regmap.h>
#include <linux/of_platform.h>
+#include <soc/qcom/qcom-spmi-pmic.h>
#define PMIC_REV2 0x101
#define PMIC_REV3 0x102
#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
-#define PM8028_SUBTYPE 0x0e
-#define PM8901_SUBTYPE 0x0f
-#define PM8950_SUBTYPE 0x10
-#define PMI8950_SUBTYPE 0x11
-#define PM8998_SUBTYPE 0x14
-#define PMI8998_SUBTYPE 0x15
-#define PM8005_SUBTYPE 0x18
-#define PM660L_SUBTYPE 0x1A
-#define PM660_SUBTYPE 0x1B
-#define PM8150_SUBTYPE 0x1E
-#define PM8150L_SUBTYPE 0x1f
-#define PM8150B_SUBTYPE 0x20
-#define PMK8002_SUBTYPE 0x21
-#define PM8009_SUBTYPE 0x24
-#define PM8150C_SUBTYPE 0x26
-#define SMB2351_SUBTYPE 0x29
+#define PMIC_REV4_V2 0x02
+
+struct qcom_spmi_dev {
+ int num_usids;
+ struct qcom_spmi_pmic pmic;
+};
+
+#define N_USIDS(n) ((void *)n)
static const struct of_device_id pmic_spmi_id_table[] = {
- { .compatible = "qcom,pm660", .data = (void *)PM660_SUBTYPE },
- { .compatible = "qcom,pm660l", .data = (void *)PM660L_SUBTYPE },
- { .compatible = "qcom,pm8004", .data = (void *)PM8004_SUBTYPE },
- { .compatible = "qcom,pm8005", .data = (void *)PM8005_SUBTYPE },
- { .compatible = "qcom,pm8019", .data = (void *)PM8019_SUBTYPE },
- { .compatible = "qcom,pm8028", .data = (void *)PM8028_SUBTYPE },
- { .compatible = "qcom,pm8110", .data = (void *)PM8110_SUBTYPE },
- { .compatible = "qcom,pm8150", .data = (void *)PM8150_SUBTYPE },
- { .compatible = "qcom,pm8150b", .data = (void *)PM8150B_SUBTYPE },
- { .compatible = "qcom,pm8150c", .data = (void *)PM8150C_SUBTYPE },
- { .compatible = "qcom,pm8150l", .data = (void *)PM8150L_SUBTYPE },
- { .compatible = "qcom,pm8226", .data = (void *)PM8226_SUBTYPE },
- { .compatible = "qcom,pm8841", .data = (void *)PM8841_SUBTYPE },
- { .compatible = "qcom,pm8901", .data = (void *)PM8901_SUBTYPE },
- { .compatible = "qcom,pm8909", .data = (void *)PM8909_SUBTYPE },
- { .compatible = "qcom,pm8916", .data = (void *)PM8916_SUBTYPE },
- { .compatible = "qcom,pm8941", .data = (void *)PM8941_SUBTYPE },
- { .compatible = "qcom,pm8950", .data = (void *)PM8950_SUBTYPE },
- { .compatible = "qcom,pm8994", .data = (void *)PM8994_SUBTYPE },
- { .compatible = "qcom,pm8998", .data = (void *)PM8998_SUBTYPE },
- { .compatible = "qcom,pma8084", .data = (void *)PMA8084_SUBTYPE },
- { .compatible = "qcom,pmd9635", .data = (void *)PMD9635_SUBTYPE },
- { .compatible = "qcom,pmi8950", .data = (void *)PMI8950_SUBTYPE },
- { .compatible = "qcom,pmi8962", .data = (void *)PMI8962_SUBTYPE },
- { .compatible = "qcom,pmi8994", .data = (void *)PMI8994_SUBTYPE },
- { .compatible = "qcom,pmi8998", .data = (void *)PMI8998_SUBTYPE },
- { .compatible = "qcom,pmk8002", .data = (void *)PMK8002_SUBTYPE },
- { .compatible = "qcom,smb2351", .data = (void *)SMB2351_SUBTYPE },
- { .compatible = "qcom,spmi-pmic", .data = (void *)COMMON_SUBTYPE },
+ { .compatible = "qcom,pm660", .data = N_USIDS(2) },
+ { .compatible = "qcom,pm660l", .data = N_USIDS(2) },
+ { .compatible = "qcom,pm8004", .data = N_USIDS(2) },
+ { .compatible = "qcom,pm8005", .data = N_USIDS(2) },
+ { .compatible = "qcom,pm8019", .data = N_USIDS(2) },
+ { .compatible = "qcom,pm8028", .data = N_USIDS(2) },
+ { .compatible = "qcom,pm8110", .data = N_USIDS(2) },
+ { .compatible = "qcom,pm8150", .data = N_USIDS(2) },
+ { .compatible = "qcom,pm8150b", .data = N_USIDS(2) },
+ { .compatible = "qcom,pm8150c", .data = N_USIDS(2) },
+ { .compatible = "qcom,pm8150l", .data = N_USIDS(2) },
+ { .compatible = "qcom,pm8226", .data = N_USIDS(2) },
+ { .compatible = "qcom,pm8841", .data = N_USIDS(2) },
+ { .compatible = "qcom,pm8901", .data = N_USIDS(2) },
+ { .compatible = "qcom,pm8909", .data = N_USIDS(2) },
+ { .compatible = "qcom,pm8916", .data = N_USIDS(2) },
+ { .compatible = "qcom,pm8941", .data = N_USIDS(2) },
+ { .compatible = "qcom,pm8950", .data = N_USIDS(2) },
+ { .compatible = "qcom,pm8994", .data = N_USIDS(2) },
+ { .compatible = "qcom,pm8998", .data = N_USIDS(2) },
+ { .compatible = "qcom,pma8084", .data = N_USIDS(2) },
+ { .compatible = "qcom,pmd9635", .data = N_USIDS(2) },
+ { .compatible = "qcom,pmi8950", .data = N_USIDS(2) },
+ { .compatible = "qcom,pmi8962", .data = N_USIDS(2) },
+ { .compatible = "qcom,pmi8994", .data = N_USIDS(2) },
+ { .compatible = "qcom,pmi8998", .data = N_USIDS(2) },
+ { .compatible = "qcom,pmk8002", .data = N_USIDS(2) },
+ { .compatible = "qcom,smb2351", .data = N_USIDS(2) },
+ { .compatible = "qcom,spmi-pmic", .data = N_USIDS(1) },
{ }
};
-static void pmic_spmi_show_revid(struct regmap *map, struct device *dev)
+/*
+ * A PMIC can be represented by multiple SPMI devices, but
+ * only the base PMIC device will contain a reference to
+ * the revision information.
+ *
+ * This function takes a pointer to a pmic device and
+ * returns a pointer to the base PMIC device.
+ *
+ * This only supports PMICs with 1 or 2 USIDs.
+ */
+static struct spmi_device *qcom_pmic_get_base_usid(struct device *dev)
{
- unsigned int rev2, minor, major, type, subtype;
- const char *name = "unknown";
- int ret, i;
+ struct spmi_device *sdev;
+ struct qcom_spmi_dev *ctx;
+ struct device_node *spmi_bus;
+ struct device_node *other_usid = NULL;
+ int function_parent_usid, ret;
+ u32 pmic_addr;
- ret = regmap_read(map, PMIC_TYPE, &type);
- if (ret < 0)
- return;
+ sdev = to_spmi_device(dev);
+ ctx = dev_get_drvdata(&sdev->dev);
+
+ /*
+ * Quick return if the function device is already in the base
+ * USID. This will always be hit for PMICs with only 1 USID.
+ */
+ if (sdev->usid % ctx->num_usids == 0)
+ return sdev;
- if (type != PMIC_TYPE_VALUE)
- return;
+ function_parent_usid = sdev->usid;
+
+ /*
+ * Walk through the list of PMICs until we find the sibling USID.
+ * The goal is to find the first USID which is less than the
+ * number of USIDs in the PMIC array, e.g. for a PMIC with 2 USIDs
+ * where the function device is under USID 3, we want to find the
+ * device for USID 2.
+ */
+ spmi_bus = of_get_parent(sdev->dev.of_node);
+ do {
+ other_usid = of_get_next_child(spmi_bus, other_usid);
+
+ ret = of_property_read_u32_index(other_usid, "reg", 0, &pmic_addr);
+ if (ret)
+ return ERR_PTR(ret);
+
+ sdev = spmi_device_from_of(other_usid);
+ if (pmic_addr == function_parent_usid - (ctx->num_usids - 1)) {
+ if (!sdev)
+ /*
+ * If the base USID for this PMIC hasn't probed yet
+ * but the secondary USID has, then we need to defer
+ * the function driver so that it will attempt to
+ * probe again when the base USID is ready.
+ */
+ return ERR_PTR(-EPROBE_DEFER);
+ return sdev;
+ }
+ } while (other_usid->sibling);
+
+ return ERR_PTR(-ENODATA);
+}
+
+static int pmic_spmi_load_revid(struct regmap *map, struct device *dev,
+ struct qcom_spmi_pmic *pmic)
+{
+ int ret;
- ret = regmap_read(map, PMIC_SUBTYPE, &subtype);
+ ret = regmap_read(map, PMIC_TYPE, &pmic->type);
if (ret < 0)
- return;
+ return ret;
- for (i = 0; i < ARRAY_SIZE(pmic_spmi_id_table); i++) {
- if (subtype == (unsigned long)pmic_spmi_id_table[i].data)
- break;
- }
+ if (pmic->type != PMIC_TYPE_VALUE)
+ return ret;
+
+ ret = regmap_read(map, PMIC_SUBTYPE, &pmic->subtype);
+ if (ret < 0)
+ return ret;
- if (i != ARRAY_SIZE(pmic_spmi_id_table))
- name = pmic_spmi_id_table[i].compatible;
+ pmic->name = of_match_device(pmic_spmi_id_table, dev)->compatible;
- ret = regmap_read(map, PMIC_REV2, &rev2);
+ ret = regmap_read(map, PMIC_REV2, &pmic->rev2);
if (ret < 0)
- return;
+ return ret;
- ret = regmap_read(map, PMIC_REV3, &minor);
+ ret = regmap_read(map, PMIC_REV3, &pmic->minor);
if (ret < 0)
- return;
+ return ret;
- ret = regmap_read(map, PMIC_REV4, &major);
+ ret = regmap_read(map, PMIC_REV4, &pmic->major);
if (ret < 0)
- return;
+ return ret;
/*
* In early versions of PM8941 and PM8226, the major revision number
* 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 ((pmic->subtype == PM8941_SUBTYPE || pmic->subtype == PM8226_SUBTYPE) &&
+ pmic->major < PMIC_REV4_V2)
+ pmic->major++;
+
+ if (pmic->subtype == PM8110_SUBTYPE)
+ pmic->minor = pmic->rev2;
+
+ dev_dbg(dev, "%x: %s v%d.%d\n",
+ pmic->subtype, pmic->name, pmic->major, pmic->minor);
+
+ return 0;
+}
+
+/**
+ * qcom_pmic_get() - Get a pointer to the base PMIC device
+ *
+ * This function takes a struct device for a driver which is a child of a PMIC.
+ * And locates the PMIC revision information for it.
+ *
+ * @dev: the pmic function device
+ * @return: the struct qcom_spmi_pmic* pointer associated with the function device
+ */
+const struct qcom_spmi_pmic *qcom_pmic_get(struct device *dev)
+{
+ struct spmi_device *sdev;
+ struct qcom_spmi_dev *spmi;
+
+ /*
+ * Make sure the device is actually a child of a PMIC
+ */
+ if (!of_match_device(pmic_spmi_id_table, dev->parent))
+ return ERR_PTR(-EINVAL);
+
+ sdev = qcom_pmic_get_base_usid(dev->parent);
- if (subtype == PM8110_SUBTYPE)
- minor = rev2;
+ if (IS_ERR(sdev))
+ return ERR_CAST(sdev);
- dev_dbg(dev, "%x: %s v%d.%d\n", subtype, name, major, minor);
+ spmi = dev_get_drvdata(&sdev->dev);
+
+ return &spmi->pmic;
}
+EXPORT_SYMBOL(qcom_pmic_get);
static const struct regmap_config spmi_regmap_config = {
.reg_bits = 16,
static int pmic_spmi_probe(struct spmi_device *sdev)
{
struct regmap *regmap;
+ struct qcom_spmi_dev *ctx;
+ int ret;
regmap = devm_regmap_init_spmi_ext(sdev, &spmi_regmap_config);
if (IS_ERR(regmap))
return PTR_ERR(regmap);
+ ctx = devm_kzalloc(&sdev->dev, sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+
+ ctx->num_usids = (uintptr_t)of_device_get_match_data(&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);
+ if (sdev->usid % ctx->num_usids == 0) {
+ ret = pmic_spmi_load_revid(regmap, &sdev->dev, &ctx->pmic);
+ if (ret < 0)
+ return ret;
+ }
+ spmi_device_set_drvdata(sdev, ctx);
return devm_of_platform_populate(&sdev->dev);
}
projects / platform / kernel / linux-rpi.git / commitdiff