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Date: Tue, 13 Jan 2015 15:41:42 +0200
From: Semen Protsenko <semen.protsenko@...ballogic.com>
To: Linus Walleij <linus.walleij@...aro.org>,
Alexandre Courbot <gnurou@...il.com>
Cc: Grant Likely <grant.likely@...aro.org>,
Mark Rutland <mark.rutland@....com>,
linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
devicetree@...r.kernel.org, Marc Zyngier <maz@...terjones.org>,
Grygorii Strashko <grygorii.strashko@...ballogic.com>,
Illia Smyrnov <illia.smyrnov@...ballogic.com>
Subject: [PATCH 1/4] gpio: max732x: Add device tree support
Signed-off-by: Semen Protsenko <semen.protsenko@...ballogic.com>
---
drivers/gpio/gpio-max732x.c | 62 +++++++++++++++++++++++++++++++++++--------
1 file changed, 51 insertions(+), 11 deletions(-)
diff --git a/drivers/gpio/gpio-max732x.c b/drivers/gpio/gpio-max732x.c
index 6c67622..a642f78 100644
--- a/drivers/gpio/gpio-max732x.c
+++ b/drivers/gpio/gpio-max732x.c
@@ -21,6 +21,7 @@
#include <linux/irq.h>
#include <linux/i2c.h>
#include <linux/i2c/max732x.h>
+#include <linux/of.h>
/*
@@ -116,6 +117,22 @@ static const struct i2c_device_id max732x_id[] = {
};
MODULE_DEVICE_TABLE(i2c, max732x_id);
+#ifdef CONFIG_OF
+static const struct of_device_id max732x_of_table[] = {
+ { .compatible = "maxim,max7319" },
+ { .compatible = "maxim,max7320" },
+ { .compatible = "maxim,max7321" },
+ { .compatible = "maxim,max7322" },
+ { .compatible = "maxim,max7323" },
+ { .compatible = "maxim,max7324" },
+ { .compatible = "maxim,max7325" },
+ { .compatible = "maxim,max7326" },
+ { .compatible = "maxim,max7327" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, max732x_of_table);
+#endif
+
struct max732x_chip {
struct gpio_chip gpio_chip;
@@ -457,10 +474,12 @@ static int max732x_irq_setup(struct max732x_chip *chip,
int has_irq = max732x_features[id->driver_data] >> 32;
int ret;
- if (pdata->irq_base && has_irq != INT_NONE) {
+ if (((pdata && pdata->irq_base) || client->irq)
+ && has_irq != INT_NONE) {
int lvl;
- chip->irq_base = pdata->irq_base;
+ if (pdata)
+ chip->irq_base = pdata->irq_base;
chip->irq_features = has_irq;
mutex_init(&chip->irq_lock);
@@ -515,7 +534,7 @@ static int max732x_irq_setup(struct max732x_chip *chip,
struct max732x_platform_data *pdata = dev_get_platdata(&client->dev);
int has_irq = max732x_features[id->driver_data] >> 32;
- if (pdata->irq_base && has_irq != INT_NONE)
+ if (((pdata && pdata->irq_base) || client->irq) && has_irq != INT_NONE)
dev_warn(&client->dev, "interrupt support not compiled in\n");
return 0;
@@ -574,28 +593,47 @@ static int max732x_setup_gpio(struct max732x_chip *chip,
return port;
}
+static struct max732x_platform_data *of_gpio_max732x(struct device *dev)
+{
+ struct max732x_platform_data *pdata;
+
+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return NULL;
+
+ pdata->gpio_base = -1;
+
+ return pdata;
+}
+
static int max732x_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct max732x_platform_data *pdata;
+ struct device_node *node;
struct max732x_chip *chip;
struct i2c_client *c;
uint16_t addr_a, addr_b;
int ret, nr_port;
pdata = dev_get_platdata(&client->dev);
- if (pdata == NULL) {
+ node = client->dev.of_node;
+
+ if (!pdata && node)
+ pdata = of_gpio_max732x(&client->dev);
+
+ if (!pdata) {
dev_dbg(&client->dev, "no platform data\n");
return -EINVAL;
}
- chip = devm_kzalloc(&client->dev, sizeof(struct max732x_chip),
- GFP_KERNEL);
+ chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
if (chip == NULL)
return -ENOMEM;
chip->client = client;
nr_port = max732x_setup_gpio(chip, id, pdata->gpio_base);
+ chip->gpio_chip.dev = &client->dev;
addr_a = (client->addr & 0x0f) | 0x60;
addr_b = (client->addr & 0x0f) | 0x50;
@@ -643,7 +681,7 @@ static int max732x_probe(struct i2c_client *client,
if (ret)
goto out_failed;
- if (pdata->setup) {
+ if (pdata && pdata->setup) {
ret = pdata->setup(client, chip->gpio_chip.base,
chip->gpio_chip.ngpio, pdata->context);
if (ret < 0)
@@ -664,9 +702,10 @@ static int max732x_remove(struct i2c_client *client)
{
struct max732x_platform_data *pdata = dev_get_platdata(&client->dev);
struct max732x_chip *chip = i2c_get_clientdata(client);
- int ret;
- if (pdata->teardown) {
+ if (pdata && pdata->teardown) {
+ int ret;
+
ret = pdata->teardown(client, chip->gpio_chip.base,
chip->gpio_chip.ngpio, pdata->context);
if (ret < 0) {
@@ -689,8 +728,9 @@ static int max732x_remove(struct i2c_client *client)
static struct i2c_driver max732x_driver = {
.driver = {
- .name = "max732x",
- .owner = THIS_MODULE,
+ .name = "max732x",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(max732x_of_table),
},
.probe = max732x_probe,
.remove = max732x_remove,
--
1.7.9.5
--
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