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ARM: OMAP: I2C: tps65010 driver converts to gpiolib

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Make the tps65010 driver use gpiolib to expose its GPIOs.

Note: This patch will get merged via omap tree instead of I2C
as it will cause some board updates. This has been discussed
at on the I2C list:

http://lists.lm-sensors.org/pipermail/i2c/2008-March/003031.html

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: i2c@lm-sensors.org
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
David Brownell 2008-02-28 22:07:28 -08:00 committed by Tony Lindgren
parent ac37a0b0ba
commit 79966fd9b4
3 changed files with 131 additions and 1 deletions
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1
drivers/i2c/chips/Kconfig
View File

@ -93,6 +93,7 @@ config ISP1301_OMAP
config TPS65010
tristate "TPS6501x Power Management chips"
depends on HAVE_GPIO_LIB
default y if MACH_OMAP_H2 || MACH_OMAP_H3 || MACH_OMAP_OSK
help
If you say yes here you get support for the TPS6501x series of

101
drivers/i2c/chips/tps65010.c
View File

@ -30,9 +30,13 @@
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/mutex.h>
#include <linux/platform_device.h>
#include <linux/i2c/tps65010.h>
#include <asm/gpio.h>
/*-------------------------------------------------------------------------*/
#define DRIVER_VERSION "2 May 2005"
@ -84,7 +88,9 @@ struct tps65010 {
u8 chgstatus, regstatus, chgconf;
u8 nmask1, nmask2;
/* not currently tracking GPIO state */
u8 outmask;
struct gpio_chip chip;
struct platform_device *leds;
};
#define POWER_POLL_DELAY msecs_to_jiffies(5000)
@ -447,6 +453,59 @@ static irqreturn_t tps65010_irq(int irq, void *_tps)
return IRQ_HANDLED;
}
/*-------------------------------------------------------------------------*/
/* offsets 0..3 == GPIO1..GPIO4
* offsets 4..5 == LED1/nPG, LED2 (we set one of the non-BLINK modes)
*/
static void
tps65010_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
{
if (offset < 4)
tps65010_set_gpio_out_value(offset + 1, value);
else
tps65010_set_led(offset - 3, value ? ON : OFF);
}
static int
tps65010_output(struct gpio_chip *chip, unsigned offset, int value)
{
/* GPIOs may be input-only */
if (offset < 4) {
struct tps65010 *tps;
tps = container_of(chip, struct tps65010, chip);
if (!(tps->outmask & (1 << offset)))
return -EINVAL;
tps65010_set_gpio_out_value(offset + 1, value);
} else
tps65010_set_led(offset - 3, value ? ON : OFF);
return 0;
}
static int tps65010_gpio_get(struct gpio_chip *chip, unsigned offset)
{
int value;
struct tps65010 *tps;
tps = container_of(chip, struct tps65010, chip);
if (offset < 4) {
value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO);
if (value < 0)
return 0;
if (value & (1 << (offset + 4))) /* output */
return !(value & (1 << offset));
else /* input */
return (value & (1 << offset));
}
/* REVISIT we *could* report LED1/nPG and LED2 state ... */
return 0;
}
/*-------------------------------------------------------------------------*/
static struct tps65010 *the_tps;
@ -454,7 +513,14 @@ static struct tps65010 *the_tps;
static int __exit tps65010_remove(struct i2c_client *client)
{
struct tps65010 *tps = i2c_get_clientdata(client);
struct tps65010_board *board = client->dev.platform_data;
if (board && board->teardown) {
int status = board->teardown(client, board->context);
if (status < 0)
dev_dbg(&client->dev, "board %s %s err %d\n",
"teardown", client->name, status);
}
if (client->irq > 0)
free_irq(client->irq, tps);
cancel_delayed_work(&tps->work);
@ -469,6 +535,7 @@ static int tps65010_probe(struct i2c_client *client)
{
struct tps65010 *tps;
int status;
struct tps65010_board *board = client->dev.platform_data;
if (the_tps) {
dev_dbg(&client->dev, "only one tps6501x chip allowed\n");
@ -577,6 +644,38 @@ static int tps65010_probe(struct i2c_client *client)
tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL,
tps, DEBUG_FOPS);
/* optionally register GPIOs */
if (board && board->base > 0) {
tps->outmask = board->outmask;
tps->chip.label = client->name;
tps->chip.set = tps65010_gpio_set;
tps->chip.direction_output = tps65010_output;
/* NOTE: only partial support for inputs; nyet IRQs */
tps->chip.get = tps65010_gpio_get;
tps->chip.base = board->base;
tps->chip.ngpio = 6;
tps->chip.can_sleep = 1;
status = gpiochip_add(&tps->chip);
if (status < 0)
dev_err(&client->dev, "can't add gpiochip, err %d\n",
status);
else if (board->setup) {
status = board->setup(client, board->context);
if (status < 0) {
dev_dbg(&client->dev,
"board %s %s err %d\n",
"setup", client->name, status);
status = 0;
}
}
}
return 0;
fail1:
kfree(tps);

30
include/linux/i2c/tps65010.h
View File

@ -152,5 +152,35 @@ extern int tps65010_config_vregs1(unsigned value);
*/
extern int tps65013_set_low_pwr(unsigned mode);
struct i2c_client;
/**
* struct tps65010_board - packages GPIO and LED lines
* @base: the GPIO number to assign to GPIO-1
* @outmask: bit (N-1) is set to allow GPIO-N to be used as an
* (open drain) output
* @setup: optional callback issued once the GPIOs are valid
* @teardown: optional callback issued before the GPIOs are invalidated
* @context: optional parameter passed to setup() and teardown()
*
* Board data may be used to package the GPIO (and LED) lines for use
* in by the generic GPIO and LED frameworks. The first four GPIOs
* starting at gpio_base are GPIO1..GPIO4. The next two are LED1/nPG
* and LED2 (with hardware blinking capability, not currently exposed).
*
* The @setup callback may be used with the kind of board-specific glue
* which hands the (now-valid) GPIOs to other drivers, or which puts
* devices in their initial states using these GPIOs.
*/
struct tps65010_board {
int base;
unsigned outmask;
int (*setup)(struct i2c_client *client, void *context);
int (*teardown)(struct i2c_client *client, void *context);
void *context;
};
#endif /* __LINUX_I2C_TPS65010_H */