From: Madhusudhan Chikkature[EMAIL PROTECTED]
This patch provides the necessary modifications to the driver to remove the
global ptr hdq_data.
Signed-off-by: Madhusudhan Chikkature[EMAIL PROTECTED]
---
drivers/w1/masters/omap_hdq.c | 137 ++
1 files changed, 72 insertions(+), 65 deletions(-)
Index: linux-omap-2.6/drivers/w1/masters/omap_hdq.c
===
--- linux-omap-2.6.orig/drivers/w1/masters/omap_hdq.c 2008-08-18
14:48:26.0 +0530
+++ linux-omap-2.6/drivers/w1/masters/omap_hdq.c2008-09-23
12:39:19.0
+0530
@@ -62,11 +62,9 @@ struct hdq_data {
spinlock_t hdq_spinlock;
};
-static struct hdq_data *hdq_data;
-
-static int omap_hdq_get(void);
-static int omap_hdq_put(void);
-static int omap_hdq_break(void);
+static int omap_hdq_get(struct hdq_data *hdq_data);
+static int omap_hdq_put(struct hdq_data *hdq_data);
+static int omap_hdq_break(struct hdq_data *hdq_data);
static int __init omap_hdq_probe(struct platform_device *pdev);
static int omap_hdq_remove(struct platform_device *pdev);
@@ -81,12 +79,13 @@ static struct platform_driver omap_hdq_d
},
};
-static u8 omap_w1_read_byte(void *data);
-static void omap_w1_write_byte(void *data, u8 byte);
-static u8 omap_w1_reset_bus(void *data);
-static void omap_w1_search_bus(void *data, u8 search_type,
+static u8 omap_w1_read_byte(void *_hdq);
+static void omap_w1_write_byte(void *_hdq, u8 byte);
+static u8 omap_w1_reset_bus(void *_hdq);
+static void omap_w1_search_bus(void *_hdq, u8 search_type,
w1_slave_found_callback slave_found);
+
static struct w1_bus_master omap_w1_master = {
.read_byte = omap_w1_read_byte,
.write_byte = omap_w1_write_byte,
@@ -97,25 +96,25 @@ static struct w1_bus_master omap_w1_mast
/*
* HDQ register I/O routines
*/
-static inline u8
-hdq_reg_in(u32 offset)
+static inline u8 hdq_reg_in(struct hdq_data *hdq_data, u32 offset)
{
return omap_readb(hdq_data-hdq_base + offset);
}
-static inline u8
-hdq_reg_out(u32 offset, u8 val)
+static inline u8 hdq_reg_out(struct hdq_data *hdq_data, u32 offset, u8 val)
{
omap_writeb(val, hdq_data-hdq_base + offset);
+
return val;
}
-static inline u8
-hdq_reg_merge(u32 offset, u8 val, u8 mask)
+static inline u8 hdq_reg_merge(struct hdq_data *hdq_data, u32 offset,
+ u8 val, u8 mask)
{
u8 new_val = (omap_readb(hdq_data-hdq_base + offset) ~mask)
| (val mask);
omap_writeb(new_val, hdq_data-hdq_base + offset);
+
return new_val;
}
@@ -125,15 +124,15 @@ hdq_reg_merge(u32 offset, u8 val, u8 mas
* HDQ_FLAG_CLEAR: wait until all bits in the flag are cleared.
* return 0 on success and -ETIMEDOUT in the case of timeout.
*/
-static int
-hdq_wait_for_flag(u32 offset, u8 flag, u8 flag_set, u8 *status)
+static int hdq_wait_for_flag(struct hdq_data *hdq_data, u32 offset,
+ u8 flag, u8 flag_set, u8 *status)
{
int ret = 0;
unsigned long timeout = jiffies + OMAP_HDQ_TIMEOUT;
if (flag_set == OMAP_HDQ_FLAG_CLEAR) {
/* wait for the flag clear */
- while (((*status = hdq_reg_in(offset)) flag)
+ while (((*status = hdq_reg_in(hdq_data, offset)) flag)
time_before(jiffies, timeout)) {
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout(1);
@@ -142,7 +141,7 @@ hdq_wait_for_flag(u32 offset, u8 flag, u
ret = -ETIMEDOUT;
} else if (flag_set == OMAP_HDQ_FLAG_SET) {
/* wait for the flag set */
- while (!((*status = hdq_reg_in(offset)) flag)
+ while (!((*status = hdq_reg_in(hdq_data, offset)) flag)
time_before(jiffies, timeout)) {
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout(1);
@@ -159,7 +158,7 @@ hdq_wait_for_flag(u32 offset, u8 flag, u
* write out a byte and fill *status with HDQ_INT_STATUS
*/
static int
-hdq_write_byte(u8 val, u8 *status)
+hdq_write_byte(struct hdq_data *hdq_data, u8 val, u8 *status)
{
int ret;
u8 tmp_status;
@@ -169,15 +168,15 @@ hdq_write_byte(u8 val, u8 *status)
spin_lock_irqsave(hdq_data-hdq_spinlock, irqflags);
/* clear interrupt flags via a dummy read */
- hdq_reg_in(OMAP_HDQ_INT_STATUS);
+ hdq_reg_in(hdq_data, OMAP_HDQ_INT_STATUS);
/* ISR loads it with new INT_STATUS */
hdq_data-hdq_irqstatus = 0;
spin_unlock_irqrestore(hdq_data-hdq_spinlock, irqflags);
- hdq_reg_out(OMAP_HDQ_TX_DATA, val);
+ hdq_reg_out(hdq_data, OMAP_HDQ_TX_DATA, val);
/* set the GO bit */
- hdq_reg_merge(OMAP_HDQ_CTRL_STATUS, OMAP_HDQ_CTRL_STATUS_GO,
+ hdq_reg_merge(hdq_data, OMAP_HDQ_CTRL_STATUS,
