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Subject[PATCH 05/28] V4L/DVB (4960): Removal of unused code from usbvision-i2c.c
Date

From: Mauro Carvalho Chehab <mchehab@infradead.org>

i2c_adap is almost not used. This patch removes it, cleaning the i2c support,
and improving driver understanding.
Thanks to Thierry Merle for testing it.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
---
drivers/media/video/usbvision/usbvision-i2c.c | 27 ++++---------------------
drivers/media/video/usbvision/usbvision.h | 23 ---------------------
2 files changed, 4 insertions(+), 46 deletions(-)
diff --git a/drivers/media/video/usbvision/usbvision-i2c.c b/drivers/media/video/usbvision/usbvision-i2c.c
index 9540bd0..efcd25b 100644
--- a/drivers/media/video/usbvision/usbvision-i2c.c
+++ b/drivers/media/video/usbvision/usbvision-i2c.c
@@ -58,7 +58,6 @@ static int usbvision_i2c_read(void *data
static inline int try_write_address(struct i2c_adapter *i2c_adap,
unsigned char addr, int retries)
{
- struct i2c_algo_usb_data *adap = i2c_adap->algo_data;
void *data;
int i, ret = -1;
char buf[4];
@@ -69,10 +68,10 @@ static inline int try_write_address(stru
ret = (usbvision_i2c_write(data, addr, buf, 1));
if (ret == 1)
break; /* success! */
- udelay(5 /*adap->udelay */ );
+ udelay(5);
if (i == retries) /* no success */
break;
- udelay(adap->udelay);
+ udelay(10);
}
if (i) {
PDEBUG(DBG_ALGO,"Needed %d retries for address %#2x", i, addr);
@@ -84,7 +83,6 @@ static inline int try_write_address(stru
static inline int try_read_address(struct i2c_adapter *i2c_adap,
unsigned char addr, int retries)
{
- struct i2c_algo_usb_data *adap = i2c_adap->algo_data;
void *data;
int i, ret = -1;
char buf[4];
@@ -94,10 +92,10 @@ static inline int try_read_address(struc
ret = (usbvision_i2c_read(data, addr, buf, 1));
if (ret == 1)
break; /* success! */
- udelay(5 /*adap->udelay */ );
+ udelay(5);
if (i == retries) /* no success */
break;
- udelay(adap->udelay);
+ udelay(10);
}
if (i) {
PDEBUG(DBG_ALGO,"Needed %d retries for address %#2x", i, addr);
@@ -248,15 +246,12 @@ int usbvision_i2c_usb_del_bus(struct i2c
/* usbvision specific I2C functions */
/* ----------------------------------------------------------------------- */
static struct i2c_adapter i2c_adap_template;
-static struct i2c_algo_usb_data i2c_algo_template;
static struct i2c_client i2c_client_template;

int usbvision_init_i2c(struct usb_usbvision *usbvision)
{
memcpy(&usbvision->i2c_adap, &i2c_adap_template,
sizeof(struct i2c_adapter));
- memcpy(&usbvision->i2c_algo, &i2c_algo_template,
- sizeof(struct i2c_algo_usb_data));
memcpy(&usbvision->i2c_client, &i2c_client_template,
sizeof(struct i2c_client));

@@ -266,9 +261,7 @@ int usbvision_init_i2c(struct usb_usbvis

i2c_set_adapdata(&usbvision->i2c_adap, usbvision);
i2c_set_clientdata(&usbvision->i2c_client, usbvision);
- i2c_set_algo_usb_data(&usbvision->i2c_algo, usbvision);

- usbvision->i2c_adap.algo_data = &usbvision->i2c_algo;
usbvision->i2c_client.adapter = &usbvision->i2c_adap;

if (usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_IIC_LRNACK) < 0) {
@@ -297,7 +290,6 @@ #endif
void call_i2c_clients(struct usb_usbvision *usbvision, unsigned int cmd,
void *arg)
{
- BUG_ON(NULL == usbvision->i2c_adap.algo_data);
i2c_clients_command(&usbvision->i2c_adap, cmd, arg);
}

@@ -531,21 +523,10 @@ static int usbvision_i2c_read(void *data
return rdcount;
}

-static struct i2c_algo_usb_data i2c_algo_template = {
- .data = NULL,
- .inb = usbvision_i2c_read,
- .outb = usbvision_i2c_write,
- .udelay = 10,
- .mdelay = 10,
- .timeout = 100,
-};
-
static struct i2c_adapter i2c_adap_template = {
.owner = THIS_MODULE,
.name = "usbvision",
.id = I2C_HW_B_BT848, /* FIXME */
- .algo = NULL,
- .algo_data = NULL,
.client_register = attach_inform,
.client_unregister = detach_inform,
#ifdef I2C_ADAP_CLASS_TV_ANALOG
diff --git a/drivers/media/video/usbvision/usbvision.h b/drivers/media/video/usbvision/usbvision.h
index 5ad07f8..b1645f9 100644
--- a/drivers/media/video/usbvision/usbvision.h
+++ b/drivers/media/video/usbvision/usbvision.h
@@ -219,18 +219,6 @@ #define USBVISION_IS_OPERATIONAL(udevice
((udevice)->last_error == 0) && \
(!(udevice)->remove_pending))

-/* I2C structures */
-struct i2c_algo_usb_data {
- void *data; /* private data for lowlevel routines */
- int (*inb) (void *data, unsigned char addr, char *buf, short len);
- int (*outb) (void *data, unsigned char addr, char *buf, short len);
-
- /* local settings */
- int udelay;
- int mdelay;
- int timeout;
-};
-
#define I2C_USB_ADAP_MAX 16

/* ----------------------------------------------------------------- */
@@ -383,7 +371,6 @@ struct usb_usbvision {

/* i2c Declaration Section*/
struct i2c_adapter i2c_adap;
- struct i2c_algo_usb_data i2c_algo;
struct i2c_client i2c_client;

struct urb *ctrlUrb;
@@ -491,16 +478,6 @@ struct usb_usbvision {

int usbvision_i2c_usb_del_bus(struct i2c_adapter *);

-static inline void *i2c_get_algo_usb_data (struct i2c_algo_usb_data *dev)
-{
- return dev->data;
-}
-
-static inline void i2c_set_algo_usb_data (struct i2c_algo_usb_data *dev, void *data)
-{
- dev->data = data;
-}
-

/* ----------------------------------------------------------------------- */
/* usbvision specific I2C functions */
-
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