Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

gpio/pca953x: Remove dynamic platform data pointer

Browse source 
In the case that we obtain device-tree data to fill in platform_data, the new
platform data struct was dynamically allocated, but the pointer to it was not
used everywhere it should. It seems easier to fix this issue by removing the
dynamic allocation altogether since its data is only used during driver
probing.

Signed-off-by: David Jander <david@protonic.nl>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
David Jander 2011-06-14 11:00:55 +02:00 committed by Grant Likely
parent c609c05db1
commit c6dcf59243
1 changed files with 28 additions and 49 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

77
drivers/gpio/gpio-pca953x.c
View file

@ -85,7 +85,6 @@ struct pca953x_chip {
#endif
struct i2c_client *client;
struct pca953x_platform_data *dyn_pdata;
struct gpio_chip gpio_chip;
const char *const *names;
int chip_type;
@ -446,13 +445,13 @@ static irqreturn_t pca953x_irq_handler(int irq, void *devid)
}
static int pca953x_irq_setup(struct pca953x_chip *chip,
const struct i2c_device_id *id)
const struct i2c_device_id *id,
int irq_base)
{
struct i2c_client *client = chip->client;
struct pca953x_platform_data *pdata = client->dev.platform_data;
int ret, offset = 0;
if (pdata->irq_base != -1
if (irq_base != -1
&& (id->driver_data & PCA_INT)) {
int lvl;
@ -476,7 +475,7 @@ static int pca953x_irq_setup(struct pca953x_chip *chip,
chip->irq_stat &= chip->reg_direction;
mutex_init(&chip->irq_lock);
chip->irq_base = irq_alloc_descs(-1, pdata->irq_base, chip->gpio_chip.ngpio, -1);
chip->irq_base = irq_alloc_descs(-1, irq_base, chip->gpio_chip.ngpio, -1);
if (chip->irq_base < 0)
goto out_failed;
@ -524,12 +523,12 @@ static void pca953x_irq_teardown(struct pca953x_chip *chip)
}
#else /* CONFIG_GPIO_PCA953X_IRQ */
static int pca953x_irq_setup(struct pca953x_chip *chip,
const struct i2c_device_id *id)
const struct i2c_device_id *id,
int irq_base)
{
struct i2c_client *client = chip->client;
struct pca953x_platform_data *pdata = client->dev.platform_data;
if (pdata->irq_base != -1 && (id->driver_data & PCA_INT))
if (irq_base != -1 && (id->driver_data & PCA_INT))
dev_warn(&client->dev, "interrupt support not compiled in\n");
return 0;
@ -547,45 +546,35 @@ static void pca953x_irq_teardown(struct pca953x_chip *chip)
/*
* Translate OpenFirmware node properties into platform_data
*/
static struct pca953x_platform_data *
pca953x_get_alt_pdata(struct i2c_client *client)
void
pca953x_get_alt_pdata(struct i2c_client *client, int *gpio_base, int *invert)
{
struct pca953x_platform_data *pdata;
struct device_node *node;
const __be32 *val;
int size;
node = client->dev.of_node;
if (node == NULL)
return NULL;
return;
pdata = kzalloc(sizeof(struct pca953x_platform_data), GFP_KERNEL);
if (pdata == NULL) {
dev_err(&client->dev, "Unable to allocate platform_data\n");
return NULL;
}
pdata->gpio_base = -1;
*gpio_base = -1;
val = of_get_property(node, "linux,gpio-base", &size);
if (val) {
if (size != sizeof(*val))
dev_warn(&client->dev, "%s: wrong linux,gpio-base\n",
node->full_name);
else
pdata->gpio_base = be32_to_cpup(val);
*gpio_base = be32_to_cpup(val);
}
val = of_get_property(node, "polarity", NULL);
if (val)
pdata->invert = *val;
return pdata;
*invert = *val;
}
#else
static struct pca953x_platform_data *
pca953x_get_alt_pdata(struct i2c_client *client)
void
pca953x_get_alt_pdata(struct i2c_client *client, int *gpio_base, int *invert)
{
return NULL;
}
#endif
@ -647,6 +636,7 @@ static int __devinit pca953x_probe(struct i2c_client *client,
{
struct pca953x_platform_data *pdata;
struct pca953x_chip *chip;
int irq_base=-1, invert=0;
int ret = 0;
chip = kzalloc(sizeof(struct pca953x_chip), GFP_KERNEL);
@ -654,26 +644,17 @@ static int __devinit pca953x_probe(struct i2c_client *client,
return -ENOMEM;
pdata = client->dev.platform_data;
if (pdata == NULL) {
pdata = pca953x_get_alt_pdata(client);
/*
* Unlike normal platform_data, this is allocated
* dynamically and must be freed in the driver
*/
chip->dyn_pdata = pdata;
}
if (pdata == NULL) {
dev_dbg(&client->dev, "no platform data\n");
ret = -EINVAL;
goto out_failed;
if (pdata) {
irq_base = pdata->irq_base;
chip->gpio_start = pdata->gpio_base;
invert = pdata->invert;
chip->names = pdata->names;
} else {
pca953x_get_alt_pdata(client, &chip->gpio_start, &invert);
}
chip->client = client;
chip->gpio_start = pdata->gpio_base;
chip->names = pdata->names;
chip->chip_type = id->driver_data & (PCA953X_TYPE | PCA957X_TYPE);
mutex_init(&chip->i2c_lock);
@ -684,13 +665,13 @@ static int __devinit pca953x_probe(struct i2c_client *client,
pca953x_setup_gpio(chip, id->driver_data & PCA_GPIO_MASK);
if (chip->chip_type == PCA953X_TYPE)
device_pca953x_init(chip, pdata->invert);
device_pca953x_init(chip, invert);
else if (chip->chip_type == PCA957X_TYPE)
device_pca957x_init(chip, pdata->invert);
device_pca957x_init(chip, invert);
else
goto out_failed;
ret = pca953x_irq_setup(chip, id);
ret = pca953x_irq_setup(chip, id, irq_base);
if (ret)
goto out_failed;
@ -698,7 +679,7 @@ static int __devinit pca953x_probe(struct i2c_client *client,
if (ret)
goto out_failed_irq;
if (pdata->setup) {
if (pdata && pdata->setup) {
ret = pdata->setup(client, chip->gpio_chip.base,
chip->gpio_chip.ngpio, pdata->context);
if (ret < 0)
@ -711,7 +692,6 @@ static int __devinit pca953x_probe(struct i2c_client *client,
out_failed_irq:
pca953x_irq_teardown(chip);
out_failed:
kfree(chip->dyn_pdata);
kfree(chip);
return ret;
}
@ -722,7 +702,7 @@ static int pca953x_remove(struct i2c_client *client)
struct pca953x_chip *chip = i2c_get_clientdata(client);
int ret = 0;
if (pdata->teardown) {
if (pdata && pdata->teardown) {
ret = pdata->teardown(client, chip->gpio_chip.base,
chip->gpio_chip.ngpio, pdata->context);
if (ret < 0) {
@ -740,7 +720,6 @@ static int pca953x_remove(struct i2c_client *client)
}
pca953x_irq_teardown(chip);
kfree(chip->dyn_pdata);
kfree(chip);
return 0;
}