mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

i2c: remove legacy integer scl/sda gpio for recovery 

Remove all reference to code related to using integer based ids for
scl/sda gpio for bus recovery. All in tree drivers are now using the
gpio descriptors to specific the required gpios.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Phil Reid <preid@electromag.com.au>
Reviewed-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Phil Reid 2017-11-02 10:40:30 +08:00 committed by Wolfram Sang
parent cd2428c368
commit e1eb7d28c0
2 changed files with 3 additions and 82 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

78
drivers/i2c/i2c-core-base.c
View File

@ -147,46 +147,6 @@ static int get_sda_gpio_value(struct i2c_adapter *adap)
return gpiod_get_value_cansleep(adap->bus_recovery_info->sda_gpiod);
}
static int i2c_get_gpios_for_recovery(struct i2c_adapter *adap)
{
struct i2c_bus_recovery_info *bri = adap->bus_recovery_info;
struct device *dev = &adap->dev;
int ret = 0;
ret = gpio_request_one(bri->scl_gpio, GPIOF_OPEN_DRAIN |
GPIOF_OUT_INIT_HIGH, "i2c-scl");
if (ret) {
dev_warn(dev, "Can't get SCL gpio: %d\n", bri->scl_gpio);
return ret;
}
bri->scl_gpiod = gpio_to_desc(bri->scl_gpio);
if (bri->get_sda) {
if (gpio_request_one(bri->sda_gpio, GPIOF_IN, "i2c-sda")) {
/* work without SDA polling */
dev_warn(dev, "Can't get SDA gpio: %d. Not using SDA polling\n",
bri->sda_gpio);
bri->get_sda = NULL;
}
bri->sda_gpiod = gpio_to_desc(bri->sda_gpio);
}
return ret;
}
static void i2c_put_gpios_for_recovery(struct i2c_adapter *adap)
{
struct i2c_bus_recovery_info *bri = adap->bus_recovery_info;
if (bri->get_sda) {
gpio_free(bri->sda_gpio);
bri->sda_gpiod = NULL;
}
gpio_free(bri->scl_gpio);
bri->scl_gpiod = NULL;
}
/*
* We are generating clock pulses. ndelay() determines durating of clk pulses.
* We will generate clock with rate 100 KHz and so duration of both clock levels
@ -195,7 +155,7 @@ static void i2c_put_gpios_for_recovery(struct i2c_adapter *adap)
#define RECOVERY_NDELAY 5000
#define RECOVERY_CLK_CNT 9
static int i2c_generic_recovery(struct i2c_adapter *adap)
int i2c_generic_scl_recovery(struct i2c_adapter *adap)
{
struct i2c_bus_recovery_info *bri = adap->bus_recovery_info;
int i = 0, val = 1, ret = 0;
@ -237,28 +197,8 @@ static int i2c_generic_recovery(struct i2c_adapter *adap)
return ret;
}
int i2c_generic_scl_recovery(struct i2c_adapter *adap)
{
return i2c_generic_recovery(adap);
}
EXPORT_SYMBOL_GPL(i2c_generic_scl_recovery);
int i2c_generic_gpio_recovery(struct i2c_adapter *adap)
{
int ret;
ret = i2c_get_gpios_for_recovery(adap);
if (ret)
return ret;
ret = i2c_generic_recovery(adap);
i2c_put_gpios_for_recovery(adap);
return ret;
}
EXPORT_SYMBOL_GPL(i2c_generic_gpio_recovery);
int i2c_recover_bus(struct i2c_adapter *adap)
{
if (!adap->bus_recovery_info)
@ -290,21 +230,7 @@ static void i2c_init_recovery(struct i2c_adapter *adap)
return;
}
/* Generic GPIO recovery */
if (bri->recover_bus == i2c_generic_gpio_recovery) {
if (!gpio_is_valid(bri->scl_gpio)) {
err_str = "invalid SCL gpio";
goto err;
}
if (gpio_is_valid(bri->sda_gpio))
bri->get_sda = get_sda_gpio_value;
else
bri->get_sda = NULL;
bri->get_scl = get_scl_gpio_value;
bri->set_scl = set_scl_gpio_value;
} else if (bri->recover_bus == i2c_generic_scl_recovery) {
if (bri->recover_bus == i2c_generic_scl_recovery) {
/* Generic SCL recovery */
if (!bri->set_scl || !bri->get_scl) {
err_str = "no {get|set}_scl() found";

7
include/linux/i2c.h
View File

@ -485,7 +485,7 @@ struct i2c_timings {
/**
* struct i2c_bus_recovery_info - I2C bus recovery information
* @recover_bus: Recover routine. Either pass driver's recover_bus() routine, or
* i2c_generic_scl_recovery() or i2c_generic_gpio_recovery().
* i2c_generic_scl_recovery().
* @get_scl: This gets current value of SCL line. Mandatory for generic SCL
* recovery. Used internally for generic GPIO recovery.
* @set_scl: This sets/clears SCL line. Mandatory for generic SCL recovery. Used
@ -497,8 +497,6 @@ struct i2c_timings {
* configure padmux here for SDA/SCL line or something else they want.
* @unprepare_recovery: This will be called after completing recovery. Platform
* may configure padmux here for SDA/SCL line or something else they want.
* @scl_gpio: gpio number of the SCL line. Only required for GPIO recovery.
* @sda_gpio: gpio number of the SDA line. Only required for GPIO recovery.
* @scl_gpiod: gpiod of the SCL line. Only required for GPIO recovery.
* @sda_gpiod: gpiod of the SDA line. Only required for GPIO recovery.
*/
@ -513,8 +511,6 @@ struct i2c_bus_recovery_info {
void (*unprepare_recovery)(struct i2c_adapter *);
/* gpio recovery */
int scl_gpio;
int sda_gpio;
struct gpio_desc *scl_gpiod;
struct gpio_desc *sda_gpiod;
};
@ -522,7 +518,6 @@ struct i2c_bus_recovery_info {
int i2c_recover_bus(struct i2c_adapter *adap);
/* Generic recovery routines */
int i2c_generic_gpio_recovery(struct i2c_adapter *adap);
int i2c_generic_scl_recovery(struct i2c_adapter *adap);
/**