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Subject[PATCH V15 6/9] mfd: pm8008: Use i2c_new_dummy_device() API
Date
Use i2c_new_dummy_device() to register pm8008-regulator
client present at a different address space, instead of
defining a separate DT node. This avoids calling the probe
twice for the same chip, once for each client pm8008-infra
and pm8008-regulator.

As a part of this define pm8008_regmap_init() to do regmap
init for both the clients and define pm8008_get_regmap() to
pass the regmap to the regulator driver.

Signed-off-by: Satya Priya <quic_c_skakit@quicinc.com>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
---
Changes in V15:
- None.

Changes in V14:
- None.

Changes in V13:
- None.

drivers/mfd/qcom-pm8008.c | 34 ++++++++++++++++++++++++++++++++--
include/linux/mfd/qcom_pm8008.h | 9 +++++++++
2 files changed, 41 insertions(+), 2 deletions(-)
create mode 100644 include/linux/mfd/qcom_pm8008.h

diff --git a/drivers/mfd/qcom-pm8008.c b/drivers/mfd/qcom-pm8008.c
index 569ffd50..55e2a8e 100644
--- a/drivers/mfd/qcom-pm8008.c
+++ b/drivers/mfd/qcom-pm8008.c
@@ -9,6 +9,7 @@
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
+#include <linux/mfd/qcom_pm8008.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>
@@ -57,6 +58,7 @@ enum {

struct pm8008_data {
struct device *dev;
+ struct regmap *regulators_regmap;
int irq;
struct regmap_irq_chip_data *irq_data;
};
@@ -150,6 +152,12 @@ static struct regmap_config qcom_mfd_regmap_cfg = {
.max_register = 0xFFFF,
};

+struct regmap *pm8008_get_regmap(const struct pm8008_data *chip)
+{
+ return chip->regulators_regmap;
+}
+EXPORT_SYMBOL_GPL(pm8008_get_regmap);
+
static int pm8008_init(struct regmap *regmap)
{
int rc;
@@ -217,11 +225,25 @@ static int pm8008_probe_irq_peripherals(struct pm8008_data *chip,
return 0;
}

+static struct regmap *pm8008_regmap_init(struct i2c_client *client,
+ struct pm8008_data *chip)
+{
+ struct regmap *regmap;
+
+ regmap = devm_regmap_init_i2c(client, &qcom_mfd_regmap_cfg);
+ if (!regmap)
+ return NULL;
+
+ i2c_set_clientdata(client, chip);
+ return regmap;
+}
+
static int pm8008_probe(struct i2c_client *client)
{
int rc;
struct pm8008_data *chip;
struct gpio_desc *reset_gpio;
+ struct i2c_client *regulators_client;
struct regmap *regmap;

chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
@@ -229,11 +251,19 @@ static int pm8008_probe(struct i2c_client *client)
return -ENOMEM;

chip->dev = &client->dev;
- regmap = devm_regmap_init_i2c(client, &qcom_mfd_regmap_cfg);
+ regmap = pm8008_regmap_init(client, chip);
if (!regmap)
return -ENODEV;

- i2c_set_clientdata(client, chip);
+ regulators_client = i2c_new_dummy_device(client->adapter, client->addr + 1);
+ if (IS_ERR(regulators_client)) {
+ dev_err(&client->dev, "can't attach client\n");
+ return PTR_ERR(regulators_client);
+ }
+
+ chip->regulators_regmap = pm8008_regmap_init(regulators_client, chip);
+ if (!chip->regulators_regmap)
+ return -ENODEV;

reset_gpio = devm_gpiod_get(chip->dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(reset_gpio))
diff --git a/include/linux/mfd/qcom_pm8008.h b/include/linux/mfd/qcom_pm8008.h
new file mode 100644
index 0000000..3814bff
--- /dev/null
+++ b/include/linux/mfd/qcom_pm8008.h
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+// Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
+#ifndef __QCOM_PM8008_H__
+#define __QCOM_PM8008_H__
+
+struct pm8008_data;
+struct regmap *pm8008_get_regmap(const struct pm8008_data *chip);
+
+#endif
--
2.7.4
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