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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2006-11-07 21:03:20 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-11-30 12:24:45 +0000
commitbeea494d5e09f9e2172894ec84324b94244826a9 (patch)
tree0783ef7823c4d7e83891a3abc02c46798c50ed4a
parentdf58d0359581bbd4ee741406d81e69456c684f9d (diff)
[ARM] Remove EEPROM slave emulation from i2c-pxa driver.
The i2c-pxa driver should not contain EEPROM slave-mode emulation; this is something the platform should provide where required. Remove it. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
-rw-r--r--drivers/i2c/busses/i2c-pxa.c131
-rw-r--r--include/linux/i2c-pxa.h31
2 files changed, 1 insertions, 161 deletions
diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
index c95a6c15416..c3b1567c852 100644
--- a/drivers/i2c/busses/i2c-pxa.c
+++ b/drivers/i2c/busses/i2c-pxa.c
@@ -358,133 +358,6 @@ static void i2c_pxa_reset(struct pxa_i2c *i2c)
#ifdef CONFIG_I2C_PXA_SLAVE
/*
- * I2C EEPROM emulation.
- */
-static struct i2c_eeprom_emu eeprom = {
- .size = I2C_EEPROM_EMU_SIZE,
- .watch = LIST_HEAD_INIT(eeprom.watch),
-};
-
-struct i2c_eeprom_emu *i2c_pxa_get_eeprom(void)
-{
- return &eeprom;
-}
-
-int i2c_eeprom_emu_addwatcher(struct i2c_eeprom_emu *emu, void *data,
- unsigned int addr, unsigned int size,
- struct i2c_eeprom_emu_watcher *watcher)
-{
- struct i2c_eeprom_emu_watch *watch;
- unsigned long flags;
-
- if (addr + size > emu->size)
- return -EINVAL;
-
- watch = kmalloc(sizeof(struct i2c_eeprom_emu_watch), GFP_KERNEL);
- if (watch) {
- watch->start = addr;
- watch->end = addr + size - 1;
- watch->ops = watcher;
- watch->data = data;
-
- local_irq_save(flags);
- list_add(&watch->node, &emu->watch);
- local_irq_restore(flags);
- }
-
- return watch ? 0 : -ENOMEM;
-}
-
-void i2c_eeprom_emu_delwatcher(struct i2c_eeprom_emu *emu, void *data,
- struct i2c_eeprom_emu_watcher *watcher)
-{
- struct i2c_eeprom_emu_watch *watch, *n;
- unsigned long flags;
-
- list_for_each_entry_safe(watch, n, &emu->watch, node) {
- if (watch->ops == watcher && watch->data == data) {
- local_irq_save(flags);
- list_del(&watch->node);
- local_irq_restore(flags);
- kfree(watch);
- }
- }
-}
-
-static void i2c_eeprom_emu_event(void *ptr, i2c_slave_event_t event)
-{
- struct i2c_eeprom_emu *emu = ptr;
-
- eedbg(3, "i2c_eeprom_emu_event: %d\n", event);
-
- switch (event) {
- case I2C_SLAVE_EVENT_START_WRITE:
- emu->seen_start = 1;
- eedbg(2, "i2c_eeprom: write initiated\n");
- break;
-
- case I2C_SLAVE_EVENT_START_READ:
- emu->seen_start = 0;
- eedbg(2, "i2c_eeprom: read initiated\n");
- break;
-
- case I2C_SLAVE_EVENT_STOP:
- emu->seen_start = 0;
- eedbg(2, "i2c_eeprom: received stop\n");
- break;
-
- default:
- eedbg(0, "i2c_eeprom: unhandled event\n");
- break;
- }
-}
-
-static int i2c_eeprom_emu_read(void *ptr)
-{
- struct i2c_eeprom_emu *emu = ptr;
- int ret;
-
- ret = emu->bytes[emu->ptr];
- emu->ptr = (emu->ptr + 1) % emu->size;
-
- return ret;
-}
-
-static void i2c_eeprom_emu_write(void *ptr, unsigned int val)
-{
- struct i2c_eeprom_emu *emu = ptr;
- struct i2c_eeprom_emu_watch *watch;
-
- if (emu->seen_start != 0) {
- eedbg(2, "i2c_eeprom_emu_write: setting ptr %02x\n", val);
- emu->ptr = val;
- emu->seen_start = 0;
- return;
- }
-
- emu->bytes[emu->ptr] = val;
-
- eedbg(1, "i2c_eeprom_emu_write: ptr=0x%02x, val=0x%02x\n",
- emu->ptr, val);
-
- list_for_each_entry(watch, &emu->watch, node) {
- if (!watch->ops || !watch->ops->write)
- continue;
- if (watch->start <= emu->ptr && watch->end >= emu->ptr)
- watch->ops->write(watch->data, emu->ptr, val);
- }
-
- emu->ptr = (emu->ptr + 1) % emu->size;
-}
-
-struct i2c_slave_client eeprom_client = {
- .data = &eeprom,
- .event = i2c_eeprom_emu_event,
- .read = i2c_eeprom_emu_read,
- .write = i2c_eeprom_emu_write
-};
-
-/*
* PXA I2C Slave mode
*/
@@ -963,11 +836,9 @@ static int i2c_pxa_probe(struct platform_device *dev)
i2c->slave_addr = I2C_PXA_SLAVE_ADDR;
#ifdef CONFIG_I2C_PXA_SLAVE
- i2c->slave = &eeprom_client;
if (plat) {
i2c->slave_addr = plat->slave_addr;
- if (plat->slave)
- i2c->slave = plat->slave;
+ i2c->slave = plat->slave;
}
#endif
diff --git a/include/linux/i2c-pxa.h b/include/linux/i2c-pxa.h
index 5f3eaf80222..41dcdfe7f62 100644
--- a/include/linux/i2c-pxa.h
+++ b/include/linux/i2c-pxa.h
@@ -1,29 +1,6 @@
#ifndef _LINUX_I2C_ALGO_PXA_H
#define _LINUX_I2C_ALGO_PXA_H
-struct i2c_eeprom_emu_watcher {
- void (*write)(void *, unsigned int addr, unsigned char newval);
-};
-
-struct i2c_eeprom_emu_watch {
- struct list_head node;
- unsigned int start;
- unsigned int end;
- struct i2c_eeprom_emu_watcher *ops;
- void *data;
-};
-
-#define I2C_EEPROM_EMU_SIZE (256)
-
-struct i2c_eeprom_emu {
- unsigned int size;
- unsigned int ptr;
- unsigned int seen_start;
- struct list_head watch;
-
- unsigned char bytes[I2C_EEPROM_EMU_SIZE];
-};
-
typedef enum i2c_slave_event_e {
I2C_SLAVE_EVENT_START_READ,
I2C_SLAVE_EVENT_START_WRITE,
@@ -37,12 +14,4 @@ struct i2c_slave_client {
void (*write)(void *ptr, unsigned int val);
};
-extern int i2c_eeprom_emu_addwatcher(struct i2c_eeprom_emu *, void *data,
- unsigned int addr, unsigned int size,
- struct i2c_eeprom_emu_watcher *);
-
-extern void i2c_eeprom_emu_delwatcher(struct i2c_eeprom_emu *, void *data, struct i2c_eeprom_emu_watcher *watcher);
-
-extern struct i2c_eeprom_emu *i2c_pxa_get_eeprom(void);
-
#endif /* _LINUX_I2C_ALGO_PXA_H */