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Date: Tue, 8 Dec 2020 17:04:02 +0900
From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
To: marek.vasut+renesas@...il.com, lee.jones@...aro.org
Cc: khiem.nguyen.xt@...esas.com, linux-renesas-soc@...r.kernel.org,
linux-kernel@...r.kernel.org,
Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
Subject: [PATCH 2/3] mfd: bd9571mwv: Make the driver more generic
From: Khiem Nguyen <khiem.nguyen.xt@...esas.com>
Since the driver supports BD9571MWV PMIC only,
this patch makes the functions and data structure become more generic
so that it can support other PMIC variants as well.
Signed-off-by: Khiem Nguyen <khiem.nguyen.xt@...esas.com>
[shimoda: rebase and refactor]
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
---
drivers/mfd/bd9571mwv.c | 47 ++++++++++++++++++++++++++++++++++---------
include/linux/mfd/bd9571mwv.h | 19 +++++++++++++++++
2 files changed, 57 insertions(+), 9 deletions(-)
diff --git a/drivers/mfd/bd9571mwv.c b/drivers/mfd/bd9571mwv.c
index 80c6ef0..57bdb6a 100644
--- a/drivers/mfd/bd9571mwv.c
+++ b/drivers/mfd/bd9571mwv.c
@@ -3,6 +3,7 @@
* ROHM BD9571MWV-M MFD driver
*
* Copyright (C) 2017 Marek Vasut <marek.vasut+renesas@...il.com>
+ * Copyright (C) 2020 Renesas Electronics Corporation
*
* Based on the TPS65086 driver
*/
@@ -102,6 +103,15 @@ static struct regmap_irq_chip bd9571mwv_irq_chip = {
.num_irqs = ARRAY_SIZE(bd9571mwv_irqs),
};
+static const struct bd957x_data bd9571mwv_data = {
+ .product_code_val = BD9571MWV_PRODUCT_CODE_VAL,
+ .part_number = BD9571MWV_PART_NUMBER,
+ .regmap_config = &bd9571mwv_regmap_config,
+ .irq_chip = &bd9571mwv_irq_chip,
+ .cells = bd9571mwv_cells,
+ .num_cells = ARRAY_SIZE(bd9571mwv_cells),
+};
+
static int bd9571mwv_identify(struct bd9571mwv *bd)
{
struct device *dev = bd->dev;
@@ -127,13 +137,12 @@ static int bd9571mwv_identify(struct bd9571mwv *bd)
ret);
return ret;
}
-
- if (value != BD9571MWV_PRODUCT_CODE_VAL) {
+ /* Confirm the product code */
+ if (value != bd->data->product_code_val) {
dev_err(dev, "Invalid product code ID %02x (expected %02x)\n",
- value, BD9571MWV_PRODUCT_CODE_VAL);
+ value, bd->data->product_code_val);
return -EINVAL;
}
-
ret = regmap_read(bd->regmap, BD9571MWV_PRODUCT_REVISION, &value);
if (ret) {
dev_err(dev, "Failed to read revision register (ret=%i)\n",
@@ -141,7 +150,8 @@ static int bd9571mwv_identify(struct bd9571mwv *bd)
return ret;
}
- dev_info(dev, "Device: BD9571MWV rev. %d\n", value & 0xff);
+ dev_info(dev, "Device: %s rev. %d\n", bd->data->part_number,
+ value & 0xff);
return 0;
}
@@ -150,6 +160,7 @@ static int bd9571mwv_probe(struct i2c_client *client,
const struct i2c_device_id *ids)
{
struct bd9571mwv *bd;
+ unsigned int product_code;
int ret;
bd = devm_kzalloc(&client->dev, sizeof(*bd), GFP_KERNEL);
@@ -160,7 +171,25 @@ static int bd9571mwv_probe(struct i2c_client *client,
bd->dev = &client->dev;
bd->irq = client->irq;
- bd->regmap = devm_regmap_init_i2c(client, &bd9571mwv_regmap_config);
+ /* Read the PMIC product code */
+ ret = i2c_smbus_read_byte_data(client, BD9571MWV_PRODUCT_CODE);
+ if (ret < 0) {
+ dev_err(&client->dev, "failed reading at 0x%02x\n",
+ BD9571MWV_PRODUCT_CODE);
+ return ret;
+ }
+
+ product_code = (unsigned int)ret;
+ if (product_code == BD9571MWV_PRODUCT_CODE_VAL)
+ bd->data = &bd9571mwv_data;
+
+ if (!bd->data) {
+ dev_err(bd->dev, "No found supported device %d\n",
+ product_code);
+ return -ENOENT;
+ }
+
+ bd->regmap = devm_regmap_init_i2c(client, bd->data->regmap_config);
if (IS_ERR(bd->regmap)) {
dev_err(bd->dev, "Failed to initialize register map\n");
return PTR_ERR(bd->regmap);
@@ -171,14 +200,14 @@ static int bd9571mwv_probe(struct i2c_client *client,
return ret;
ret = regmap_add_irq_chip(bd->regmap, bd->irq, IRQF_ONESHOT, 0,
- &bd9571mwv_irq_chip, &bd->irq_data);
+ bd->data->irq_chip, &bd->irq_data);
if (ret) {
dev_err(bd->dev, "Failed to register IRQ chip\n");
return ret;
}
- ret = mfd_add_devices(bd->dev, PLATFORM_DEVID_AUTO, bd9571mwv_cells,
- ARRAY_SIZE(bd9571mwv_cells), NULL, 0,
+ ret = mfd_add_devices(bd->dev, PLATFORM_DEVID_AUTO, bd->data->cells,
+ bd->data->num_cells, NULL, 0,
regmap_irq_get_domain(bd->irq_data));
if (ret) {
regmap_del_irq_chip(bd->irq, bd->irq_data);
diff --git a/include/linux/mfd/bd9571mwv.h b/include/linux/mfd/bd9571mwv.h
index bcc7092..0126b52 100644
--- a/include/linux/mfd/bd9571mwv.h
+++ b/include/linux/mfd/bd9571mwv.h
@@ -3,6 +3,7 @@
* ROHM BD9571MWV-M driver
*
* Copyright (C) 2017 Marek Vasut <marek.vasut+renesas@...il.com>
+ * Copyright (C) 2019 Renesas Electronics Corporation
*
* Based on the TPS65086 driver
*/
@@ -11,6 +12,7 @@
#define __LINUX_MFD_BD9571MWV_H
#include <linux/device.h>
+#include <linux/mfd/core.h>
#include <linux/regmap.h>
/* List of registers for BD9571MWV */
@@ -83,6 +85,8 @@
#define BD9571MWV_ACCESS_KEY 0xff
+#define BD9571MWV_PART_NUMBER "BD9571MWV"
+
/* Define the BD9571MWV IRQ numbers */
enum bd9571mwv_irqs {
BD9571MWV_IRQ_MD1,
@@ -96,6 +100,20 @@ enum bd9571mwv_irqs {
};
/**
+ * struct bd957x_data - internal data for the bd957x driver
+ *
+ * Internal data to distinguish bd9571mwv chip and bd9574mwf chip
+ */
+struct bd957x_data {
+ int product_code_val;
+ char *part_number;
+ const struct regmap_config *regmap_config;
+ const struct regmap_irq_chip *irq_chip;
+ const struct mfd_cell *cells;
+ int num_cells;
+};
+
+/**
* struct bd9571mwv - state holder for the bd9571mwv driver
*
* Device data may be used to access the BD9571MWV chip
@@ -103,6 +121,7 @@ enum bd9571mwv_irqs {
struct bd9571mwv {
struct device *dev;
struct regmap *regmap;
+ const struct bd957x_data *data;
/* IRQ Data */
int irq;
--
2.7.4
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