summaryrefslogtreecommitdiff
path: root/drivers/i2c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2010-03-01 09:15:15 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2010-03-01 09:15:15 -0800
commitac0f6f927db539e03e1f3f61bcd4ed57d5cde7a9 (patch)
tree816e5ac643b15c2050c64a7075f0f7e13d86ea09 /drivers/i2c
parentb1bf9368407ae7e89d8a005bb40beb70a41df539 (diff)
parent9f33be2c3a80bdc2cc08342dd77fac87652e0548 (diff)
Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (100 commits) ARM: Eliminate decompressor -Dstatic= PIC hack ARM: 5958/1: ARM: U300: fix inverted clk round rate ARM: 5956/1: misplaced parentheses ARM: 5955/1: ep93xx: move timer defines into core.c and document ARM: 5954/1: ep93xx: move gpio interrupt support to gpio.c ARM: 5953/1: ep93xx: fix broken build of clock.c ARM: 5952/1: ARM: MM: Add ARM_L1_CACHE_SHIFT_6 for handle inside each ARCH Kconfig ARM: 5949/1: NUC900 add gpio virtual memory map ARM: 5948/1: Enable timer0 to time4 clock support for nuc910 ARM: 5940/2: ARM: MMCI: remove custom DBG macro and printk ARM: make_coherent(): fix problems with highpte, part 2 MM: Pass a PTE pointer to update_mmu_cache() rather than the PTE itself ARM: 5945/1: ep93xx: include correct irq.h in core.c ARM: 5933/1: amba-pl011: support hardware flow control ARM: 5930/1: Add PKMAP area description to memory.txt. ARM: 5929/1: Add checks to detect overlap of memory regions. ARM: 5928/1: Change type of VMALLOC_END to unsigned long. ARM: 5927/1: Make delimiters of DMA area globally visibly. ARM: 5926/1: Add "Virtual kernel memory..." printout. ARM: 5920/1: OMAP4: Enable L2 Cache ... Fix up trivial conflict in arch/arm/mach-mx25/clock.c
Diffstat (limited to 'drivers/i2c')
-rw-r--r--drivers/i2c/busses/i2c-pnx.c285
1 files changed, 155 insertions, 130 deletions
diff --git a/drivers/i2c/busses/i2c-pnx.c b/drivers/i2c/busses/i2c-pnx.c
index 5d1c2603a130..2b0bd0b042d6 100644
--- a/drivers/i2c/busses/i2c-pnx.c
+++ b/drivers/i2c/busses/i2c-pnx.c
@@ -20,15 +20,15 @@
#include <linux/platform_device.h>
#include <linux/i2c-pnx.h>
#include <linux/io.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+
#include <mach/hardware.h>
#include <mach/i2c.h>
-#include <asm/irq.h>
-#include <asm/uaccess.h>
#define I2C_PNX_TIMEOUT 10 /* msec */
#define I2C_PNX_SPEED_KHZ 100
#define I2C_PNX_REGION_SIZE 0x100
-#define PNX_DEFAULT_FREQ 13 /* MHz */
static inline int wait_timeout(long timeout, struct i2c_pnx_algo_data *data)
{
@@ -50,22 +50,21 @@ static inline int wait_reset(long timeout, struct i2c_pnx_algo_data *data)
return (timeout <= 0);
}
-static inline void i2c_pnx_arm_timer(struct i2c_adapter *adap)
+static inline void i2c_pnx_arm_timer(struct i2c_pnx_algo_data *alg_data)
{
- struct i2c_pnx_algo_data *data = adap->algo_data;
- struct timer_list *timer = &data->mif.timer;
- int expires = I2C_PNX_TIMEOUT / (1000 / HZ);
+ struct timer_list *timer = &alg_data->mif.timer;
+ unsigned long expires = msecs_to_jiffies(I2C_PNX_TIMEOUT);
if (expires <= 1)
expires = 2;
del_timer_sync(timer);
- dev_dbg(&adap->dev, "Timer armed at %lu plus %u jiffies.\n",
+ dev_dbg(&alg_data->adapter.dev, "Timer armed at %lu plus %lu jiffies.\n",
jiffies, expires);
timer->expires = jiffies + expires;
- timer->data = (unsigned long)adap;
+ timer->data = (unsigned long)&alg_data;
add_timer(timer);
}
@@ -77,34 +76,34 @@ static inline void i2c_pnx_arm_timer(struct i2c_adapter *adap)
*
* Generate a START signal in the desired mode.
*/
-static int i2c_pnx_start(unsigned char slave_addr, struct i2c_adapter *adap)
+static int i2c_pnx_start(unsigned char slave_addr,
+ struct i2c_pnx_algo_data *alg_data)
{
- struct i2c_pnx_algo_data *alg_data = adap->algo_data;
-
- dev_dbg(&adap->dev, "%s(): addr 0x%x mode %d\n", __func__,
+ dev_dbg(&alg_data->adapter.dev, "%s(): addr 0x%x mode %d\n", __func__,
slave_addr, alg_data->mif.mode);
/* Check for 7 bit slave addresses only */
if (slave_addr & ~0x7f) {
- dev_err(&adap->dev, "%s: Invalid slave address %x. "
- "Only 7-bit addresses are supported\n",
- adap->name, slave_addr);
+ dev_err(&alg_data->adapter.dev,
+ "%s: Invalid slave address %x. Only 7-bit addresses are supported\n",
+ alg_data->adapter.name, slave_addr);
return -EINVAL;
}
/* First, make sure bus is idle */
if (wait_timeout(I2C_PNX_TIMEOUT, alg_data)) {
/* Somebody else is monopolizing the bus */
- dev_err(&adap->dev, "%s: Bus busy. Slave addr = %02x, "
- "cntrl = %x, stat = %x\n",
- adap->name, slave_addr,
- ioread32(I2C_REG_CTL(alg_data)),
- ioread32(I2C_REG_STS(alg_data)));
+ dev_err(&alg_data->adapter.dev,
+ "%s: Bus busy. Slave addr = %02x, cntrl = %x, stat = %x\n",
+ alg_data->adapter.name, slave_addr,
+ ioread32(I2C_REG_CTL(alg_data)),
+ ioread32(I2C_REG_STS(alg_data)));
return -EBUSY;
} else if (ioread32(I2C_REG_STS(alg_data)) & mstatus_afi) {
/* Sorry, we lost the bus */
- dev_err(&adap->dev, "%s: Arbitration failure. "
- "Slave addr = %02x\n", adap->name, slave_addr);
+ dev_err(&alg_data->adapter.dev,
+ "%s: Arbitration failure. Slave addr = %02x\n",
+ alg_data->adapter.name, slave_addr);
return -EIO;
}
@@ -115,14 +114,14 @@ static int i2c_pnx_start(unsigned char slave_addr, struct i2c_adapter *adap)
iowrite32(ioread32(I2C_REG_STS(alg_data)) | mstatus_tdi | mstatus_afi,
I2C_REG_STS(alg_data));
- dev_dbg(&adap->dev, "%s(): sending %#x\n", __func__,
+ dev_dbg(&alg_data->adapter.dev, "%s(): sending %#x\n", __func__,
(slave_addr << 1) | start_bit | alg_data->mif.mode);
/* Write the slave address, START bit and R/W bit */
iowrite32((slave_addr << 1) | start_bit | alg_data->mif.mode,
I2C_REG_TX(alg_data));
- dev_dbg(&adap->dev, "%s(): exit\n", __func__);
+ dev_dbg(&alg_data->adapter.dev, "%s(): exit\n", __func__);
return 0;
}
@@ -133,13 +132,12 @@ static int i2c_pnx_start(unsigned char slave_addr, struct i2c_adapter *adap)
*
* Generate a STOP signal to terminate the master transaction.
*/
-static void i2c_pnx_stop(struct i2c_adapter *adap)
+static void i2c_pnx_stop(struct i2c_pnx_algo_data *alg_data)
{
- struct i2c_pnx_algo_data *alg_data = adap->algo_data;
/* Only 1 msec max timeout due to interrupt context */
long timeout = 1000;
- dev_dbg(&adap->dev, "%s(): entering: stat = %04x.\n",
+ dev_dbg(&alg_data->adapter.dev, "%s(): entering: stat = %04x.\n",
__func__, ioread32(I2C_REG_STS(alg_data)));
/* Write a STOP bit to TX FIFO */
@@ -153,7 +151,7 @@ static void i2c_pnx_stop(struct i2c_adapter *adap)
timeout--;
}
- dev_dbg(&adap->dev, "%s(): exiting: stat = %04x.\n",
+ dev_dbg(&alg_data->adapter.dev, "%s(): exiting: stat = %04x.\n",
__func__, ioread32(I2C_REG_STS(alg_data)));
}
@@ -163,12 +161,11 @@ static void i2c_pnx_stop(struct i2c_adapter *adap)
*
* Sends one byte of data to the slave
*/
-static int i2c_pnx_master_xmit(struct i2c_adapter *adap)
+static int i2c_pnx_master_xmit(struct i2c_pnx_algo_data *alg_data)
{
- struct i2c_pnx_algo_data *alg_data = adap->algo_data;
u32 val;
- dev_dbg(&adap->dev, "%s(): entering: stat = %04x.\n",
+ dev_dbg(&alg_data->adapter.dev, "%s(): entering: stat = %04x.\n",
__func__, ioread32(I2C_REG_STS(alg_data)));
if (alg_data->mif.len > 0) {
@@ -184,15 +181,15 @@ static int i2c_pnx_master_xmit(struct i2c_adapter *adap)
alg_data->mif.len--;
iowrite32(val, I2C_REG_TX(alg_data));
- dev_dbg(&adap->dev, "%s(): xmit %#x [%d]\n", __func__,
- val, alg_data->mif.len + 1);
+ dev_dbg(&alg_data->adapter.dev, "%s(): xmit %#x [%d]\n",
+ __func__, val, alg_data->mif.len + 1);
if (alg_data->mif.len == 0) {
if (alg_data->last) {
/* Wait until the STOP is seen. */
if (wait_timeout(I2C_PNX_TIMEOUT, alg_data))
- dev_err(&adap->dev, "The bus is still "
- "active after timeout\n");
+ dev_err(&alg_data->adapter.dev,
+ "The bus is still active after timeout\n");
}
/* Disable master interrupts */
iowrite32(ioread32(I2C_REG_CTL(alg_data)) &
@@ -201,14 +198,15 @@ static int i2c_pnx_master_xmit(struct i2c_adapter *adap)
del_timer_sync(&alg_data->mif.timer);
- dev_dbg(&adap->dev, "%s(): Waking up xfer routine.\n",
+ dev_dbg(&alg_data->adapter.dev,
+ "%s(): Waking up xfer routine.\n",
__func__);
complete(&alg_data->mif.complete);
}
} else if (alg_data->mif.len == 0) {
/* zero-sized transfer */
- i2c_pnx_stop(adap);
+ i2c_pnx_stop(alg_data);
/* Disable master interrupts. */
iowrite32(ioread32(I2C_REG_CTL(alg_data)) &
@@ -217,13 +215,14 @@ static int i2c_pnx_master_xmit(struct i2c_adapter *adap)
/* Stop timer. */
del_timer_sync(&alg_data->mif.timer);
- dev_dbg(&adap->dev, "%s(): Waking up xfer routine after "
- "zero-xfer.\n", __func__);
+ dev_dbg(&alg_data->adapter.dev,
+ "%s(): Waking up xfer routine after zero-xfer.\n",
+ __func__);
complete(&alg_data->mif.complete);
}
- dev_dbg(&adap->dev, "%s(): exiting: stat = %04x.\n",
+ dev_dbg(&alg_data->adapter.dev, "%s(): exiting: stat = %04x.\n",
__func__, ioread32(I2C_REG_STS(alg_data)));
return 0;
@@ -235,21 +234,21 @@ static int i2c_pnx_master_xmit(struct i2c_adapter *adap)
*
* Reads one byte data from the slave
*/
-static int i2c_pnx_master_rcv(struct i2c_adapter *adap)
+static int i2c_pnx_master_rcv(struct i2c_pnx_algo_data *alg_data)
{
- struct i2c_pnx_algo_data *alg_data = adap->algo_data;
unsigned int val = 0;
u32 ctl = 0;
- dev_dbg(&adap->dev, "%s(): entering: stat = %04x.\n",
+ dev_dbg(&alg_data->adapter.dev, "%s(): entering: stat = %04x.\n",
__func__, ioread32(I2C_REG_STS(alg_data)));
/* Check, whether there is already data,
* or we didn't 'ask' for it yet.
*/
if (ioread32(I2C_REG_STS(alg_data)) & mstatus_rfe) {
- dev_dbg(&adap->dev, "%s(): Write dummy data to fill "
- "Rx-fifo...\n", __func__);
+ dev_dbg(&alg_data->adapter.dev,
+ "%s(): Write dummy data to fill Rx-fifo...\n",
+ __func__);
if (alg_data->mif.len == 1) {
/* Last byte, do not acknowledge next rcv. */
@@ -281,16 +280,16 @@ static int i2c_pnx_master_rcv(struct i2c_adapter *adap)
if (alg_data->mif.len > 0) {
val = ioread32(I2C_REG_RX(alg_data));
*alg_data->mif.buf++ = (u8) (val & 0xff);
- dev_dbg(&adap->dev, "%s(): rcv 0x%x [%d]\n", __func__, val,
- alg_data->mif.len);
+ dev_dbg(&alg_data->adapter.dev, "%s(): rcv 0x%x [%d]\n",
+ __func__, val, alg_data->mif.len);
alg_data->mif.len--;
if (alg_data->mif.len == 0) {
if (alg_data->last)
/* Wait until the STOP is seen. */
if (wait_timeout(I2C_PNX_TIMEOUT, alg_data))
- dev_err(&adap->dev, "The bus is still "
- "active after timeout\n");
+ dev_err(&alg_data->adapter.dev,
+ "The bus is still active after timeout\n");
/* Disable master interrupts */
ctl = ioread32(I2C_REG_CTL(alg_data));
@@ -304,7 +303,7 @@ static int i2c_pnx_master_rcv(struct i2c_adapter *adap)
}
}
- dev_dbg(&adap->dev, "%s(): exiting: stat = %04x.\n",
+ dev_dbg(&alg_data->adapter.dev, "%s(): exiting: stat = %04x.\n",
__func__, ioread32(I2C_REG_STS(alg_data)));
return 0;
@@ -312,11 +311,11 @@ static int i2c_pnx_master_rcv(struct i2c_adapter *adap)
static irqreturn_t i2c_pnx_interrupt(int irq, void *dev_id)
{
+ struct i2c_pnx_algo_data *alg_data = dev_id;
u32 stat, ctl;
- struct i2c_adapter *adap = dev_id;
- struct i2c_pnx_algo_data *alg_data = adap->algo_data;
- dev_dbg(&adap->dev, "%s(): mstat = %x mctrl = %x, mode = %d\n",
+ dev_dbg(&alg_data->adapter.dev,
+ "%s(): mstat = %x mctrl = %x, mode = %d\n",
__func__,
ioread32(I2C_REG_STS(alg_data)),
ioread32(I2C_REG_CTL(alg_data)),
@@ -339,10 +338,10 @@ static irqreturn_t i2c_pnx_interrupt(int irq, void *dev_id)
complete(&alg_data->mif.complete);
} else if (stat & mstatus_nai) {
/* Slave did not acknowledge, generate a STOP */
- dev_dbg(&adap->dev, "%s(): "
- "Slave did not acknowledge, generating a STOP.\n",
+ dev_dbg(&alg_data->adapter.dev,
+ "%s(): Slave did not acknowledge, generating a STOP.\n",
__func__);
- i2c_pnx_stop(adap);
+ i2c_pnx_stop(alg_data);
/* Disable master interrupts. */
ctl = ioread32(I2C_REG_CTL(alg_data));
@@ -368,9 +367,9 @@ static irqreturn_t i2c_pnx_interrupt(int irq, void *dev_id)
*/
if ((stat & mstatus_drmi) || !(stat & mstatus_rfe)) {
if (alg_data->mif.mode == I2C_SMBUS_WRITE) {
- i2c_pnx_master_xmit(adap);
+ i2c_pnx_master_xmit(alg_data);
} else if (alg_data->mif.mode == I2C_SMBUS_READ) {
- i2c_pnx_master_rcv(adap);
+ i2c_pnx_master_rcv(alg_data);
}
}
}
@@ -379,7 +378,8 @@ static irqreturn_t i2c_pnx_interrupt(int irq, void *dev_id)
stat = ioread32(I2C_REG_STS(alg_data));
iowrite32(stat | mstatus_tdi | mstatus_afi, I2C_REG_STS(alg_data));
- dev_dbg(&adap->dev, "%s(): exiting, stat = %x ctrl = %x.\n",
+ dev_dbg(&alg_data->adapter.dev,
+ "%s(): exiting, stat = %x ctrl = %x.\n",
__func__, ioread32(I2C_REG_STS(alg_data)),
ioread32(I2C_REG_CTL(alg_data)));
@@ -388,14 +388,13 @@ static irqreturn_t i2c_pnx_interrupt(int irq, void *dev_id)
static void i2c_pnx_timeout(unsigned long data)
{
- struct i2c_adapter *adap = (struct i2c_adapter *)data;
- struct i2c_pnx_algo_data *alg_data = adap->algo_data;
+ struct i2c_pnx_algo_data *alg_data = (struct i2c_pnx_algo_data *)data;
u32 ctl;
- dev_err(&adap->dev, "Master timed out. stat = %04x, cntrl = %04x. "
- "Resetting master...\n",
- ioread32(I2C_REG_STS(alg_data)),
- ioread32(I2C_REG_CTL(alg_data)));
+ dev_err(&alg_data->adapter.dev,
+ "Master timed out. stat = %04x, cntrl = %04x. Resetting master...\n",
+ ioread32(I2C_REG_STS(alg_data)),
+ ioread32(I2C_REG_CTL(alg_data)));
/* Reset master and disable interrupts */
ctl = ioread32(I2C_REG_CTL(alg_data));
@@ -409,15 +408,14 @@ static void i2c_pnx_timeout(unsigned long data)
complete(&alg_data->mif.complete);
}
-static inline void bus_reset_if_active(struct i2c_adapter *adap)
+static inline void bus_reset_if_active(struct i2c_pnx_algo_data *alg_data)
{
- struct i2c_pnx_algo_data *alg_data = adap->algo_data;
u32 stat;
if ((stat = ioread32(I2C_REG_STS(alg_data))) & mstatus_active) {
- dev_err(&adap->dev,
+ dev_err(&alg_data->adapter.dev,
"%s: Bus is still active after xfer. Reset it...\n",
- adap->name);
+ alg_data->adapter.name);
iowrite32(ioread32(I2C_REG_CTL(alg_data)) | mcntrl_reset,
I2C_REG_CTL(alg_data));
wait_reset(I2C_PNX_TIMEOUT, alg_data);
@@ -451,10 +449,11 @@ i2c_pnx_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
struct i2c_pnx_algo_data *alg_data = adap->algo_data;
u32 stat = ioread32(I2C_REG_STS(alg_data));
- dev_dbg(&adap->dev, "%s(): entering: %d messages, stat = %04x.\n",
+ dev_dbg(&alg_data->adapter.dev,
+ "%s(): entering: %d messages, stat = %04x.\n",
__func__, num, ioread32(I2C_REG_STS(alg_data)));
- bus_reset_if_active(adap);
+ bus_reset_if_active(alg_data);
/* Process transactions in a loop. */
for (i = 0; rc >= 0 && i < num; i++) {
@@ -464,9 +463,9 @@ i2c_pnx_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
addr = pmsg->addr;
if (pmsg->flags & I2C_M_TEN) {
- dev_err(&adap->dev,
+ dev_err(&alg_data->adapter.dev,
"%s: 10 bits addr not supported!\n",
- adap->name);
+ alg_data->adapter.name);
rc = -EINVAL;
break;
}
@@ -478,11 +477,10 @@ i2c_pnx_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
alg_data->mif.ret = 0;
alg_data->last = (i == num - 1);
- dev_dbg(&adap->dev, "%s(): mode %d, %d bytes\n", __func__,
- alg_data->mif.mode,
- alg_data->mif.len);
+ dev_dbg(&alg_data->adapter.dev, "%s(): mode %d, %d bytes\n",
+ __func__, alg_data->mif.mode, alg_data->mif.len);
- i2c_pnx_arm_timer(adap);
+ i2c_pnx_arm_timer(alg_data);
/* initialize the completion var */
init_completion(&alg_data->mif.complete);
@@ -493,7 +491,7 @@ i2c_pnx_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
I2C_REG_CTL(alg_data));
/* Put start-code and slave-address on the bus. */
- rc = i2c_pnx_start(addr, adap);
+ rc = i2c_pnx_start(addr, alg_data);
if (rc < 0)
break;
@@ -502,31 +500,32 @@ i2c_pnx_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
if (!(rc = alg_data->mif.ret))
completed++;
- dev_dbg(&adap->dev, "%s(): Complete, return code = %d.\n",
+ dev_dbg(&alg_data->adapter.dev,
+ "%s(): Complete, return code = %d.\n",
__func__, rc);
/* Clear TDI and AFI bits in case they are set. */
if ((stat = ioread32(I2C_REG_STS(alg_data))) & mstatus_tdi) {
- dev_dbg(&adap->dev,
+ dev_dbg(&alg_data->adapter.dev,
"%s: TDI still set... clearing now.\n",
- adap->name);
+ alg_data->adapter.name);
iowrite32(stat, I2C_REG_STS(alg_data));
}
if ((stat = ioread32(I2C_REG_STS(alg_data))) & mstatus_afi) {
- dev_dbg(&adap->dev,
+ dev_dbg(&alg_data->adapter.dev,
"%s: AFI still set... clearing now.\n",
- adap->name);
+ alg_data->adapter.name);
iowrite32(stat, I2C_REG_STS(alg_data));
}
}
- bus_reset_if_active(adap);
+ bus_reset_if_active(alg_data);
/* Cleanup to be sure... */
alg_data->mif.buf = NULL;
alg_data->mif.len = 0;
- dev_dbg(&adap->dev, "%s(): exiting, stat = %x\n",
+ dev_dbg(&alg_data->adapter.dev, "%s(): exiting, stat = %x\n",
__func__, ioread32(I2C_REG_STS(alg_data)));
if (completed != num)
@@ -545,69 +544,92 @@ static struct i2c_algorithm pnx_algorithm = {
.functionality = i2c_pnx_func,
};
+#ifdef CONFIG_PM
static int i2c_pnx_controller_suspend(struct platform_device *pdev,
pm_message_t state)
{
- struct i2c_pnx_data *i2c_pnx = platform_get_drvdata(pdev);
- return i2c_pnx->suspend(pdev, state);
+ struct i2c_pnx_algo_data *alg_data = platform_get_drvdata(pdev);
+
+ /* FIXME: shouldn't this be clk_disable? */
+ clk_enable(alg_data->clk);
+
+ return 0;
}
static int i2c_pnx_controller_resume(struct platform_device *pdev)
{
- struct i2c_pnx_data *i2c_pnx = platform_get_drvdata(pdev);
- return i2c_pnx->resume(pdev);
+ struct i2c_pnx_algo_data *alg_data = platform_get_drvdata(pdev);
+
+ return clk_enable(alg_data->clk);
}
+#else
+#define i2c_pnx_controller_suspend NULL
+#define i2c_pnx_controller_resume NULL
+#endif
static int __devinit i2c_pnx_probe(struct platform_device *pdev)
{
unsigned long tmp;
int ret = 0;
struct i2c_pnx_algo_data *alg_data;
- int freq_mhz;
+ unsigned long freq;
struct i2c_pnx_data *i2c_pnx = pdev->dev.platform_data;
- if (!i2c_pnx || !i2c_pnx->adapter) {
+ if (!i2c_pnx || !i2c_pnx->name) {
dev_err(&pdev->dev, "%s: no platform data supplied\n",
__func__);
ret = -EINVAL;
goto out;
}
- platform_set_drvdata(pdev, i2c_pnx);
-
- if (i2c_pnx->calculate_input_freq)
- freq_mhz = i2c_pnx->calculate_input_freq(pdev);
- else {
- freq_mhz = PNX_DEFAULT_FREQ;
- dev_info(&pdev->dev, "Setting bus frequency to default value: "
- "%d MHz\n", freq_mhz);
+ alg_data = kzalloc(sizeof(*alg_data), GFP_KERNEL);
+ if (!alg_data) {
+ ret = -ENOMEM;
+ goto err_kzalloc;
}
- i2c_pnx->adapter->algo = &pnx_algorithm;
+ platform_set_drvdata(pdev, alg_data);
+
+ strlcpy(alg_data->adapter.name, i2c_pnx->name,
+ sizeof(alg_data->adapter.name));
+ alg_data->adapter.dev.parent = &pdev->dev;
+ alg_data->adapter.algo = &pnx_algorithm;
+ alg_data->adapter.algo_data = alg_data;
+ alg_data->adapter.nr = pdev->id;
+ alg_data->i2c_pnx = i2c_pnx;
+
+ alg_data->clk = clk_get(&pdev->dev, NULL);
+ if (IS_ERR(alg_data->clk)) {
+ ret = PTR_ERR(alg_data->clk);
+ goto out_drvdata;
+ }
- alg_data = i2c_pnx->adapter->algo_data;
init_timer(&alg_data->mif.timer);
alg_data->mif.timer.function = i2c_pnx_timeout;
- alg_data->mif.timer.data = (unsigned long)i2c_pnx->adapter;
+ alg_data->mif.timer.data = (unsigned long)alg_data;
/* Register I/O resource */
- if (!request_mem_region(alg_data->base, I2C_PNX_REGION_SIZE,
+ if (!request_mem_region(i2c_pnx->base, I2C_PNX_REGION_SIZE,
pdev->name)) {
dev_err(&pdev->dev,
"I/O region 0x%08x for I2C already in use.\n",
- alg_data->base);
+ i2c_pnx->base);
ret = -ENODEV;
- goto out_drvdata;
+ goto out_clkget;
}
- if (!(alg_data->ioaddr =
- (u32)ioremap(alg_data->base, I2C_PNX_REGION_SIZE))) {
+ alg_data->ioaddr = ioremap(i2c_pnx->base, I2C_PNX_REGION_SIZE);
+ if (!alg_data->ioaddr) {
dev_err(&pdev->dev, "Couldn't ioremap I2C I/O region\n");
ret = -ENOMEM;
goto out_release;
}
- i2c_pnx->set_clock_run(pdev);
+ ret = clk_enable(alg_data->clk);
+ if (ret)
+ goto out_unmap;
+
+ freq = clk_get_rate(alg_data->clk);
/*
* Clock Divisor High This value is the number of system clocks
@@ -620,45 +642,47 @@ static int __devinit i2c_pnx_probe(struct platform_device *pdev)
* the deglitching filter length.
*/
- tmp = ((freq_mhz * 1000) / I2C_PNX_SPEED_KHZ) / 2 - 2;
+ tmp = ((freq / 1000) / I2C_PNX_SPEED_KHZ) / 2 - 2;
iowrite32(tmp, I2C_REG_CKH(alg_data));
iowrite32(tmp, I2C_REG_CKL(alg_data));
iowrite32(mcntrl_reset, I2C_REG_CTL(alg_data));
if (wait_reset(I2C_PNX_TIMEOUT, alg_data)) {
ret = -ENODEV;
- goto out_unmap;
+ goto out_clock;
}
init_completion(&alg_data->mif.complete);
- ret = request_irq(alg_data->irq, i2c_pnx_interrupt,
- 0, pdev->name, i2c_pnx->adapter);
+ ret = request_irq(i2c_pnx->irq, i2c_pnx_interrupt,
+ 0, pdev->name, alg_data);
if (ret)
goto out_clock;
/* Register this adapter with the I2C subsystem */
- i2c_pnx->adapter->dev.parent = &pdev->dev;
- i2c_pnx->adapter->nr = pdev->id;
- ret = i2c_add_numbered_adapter(i2c_pnx->adapter);
+ ret = i2c_add_numbered_adapter(&alg_data->adapter);
if (ret < 0) {
dev_err(&pdev->dev, "I2C: Failed to add bus\n");
goto out_irq;
}
dev_dbg(&pdev->dev, "%s: Master at %#8x, irq %d.\n",
- i2c_pnx->adapter->name, alg_data->base, alg_data->irq);
+ alg_data->adapter.name, i2c_pnx->base, i2c_pnx->irq);
return 0;
out_irq:
- free_irq(alg_data->irq, i2c_pnx->adapter);
+ free_irq(i2c_pnx->irq, alg_data);
out_clock:
- i2c_pnx->set_clock_stop(pdev);
+ clk_disable(alg_data->clk);
out_unmap:
- iounmap((void *)alg_data->ioaddr);
+ iounmap(alg_data->ioaddr);
out_release:
- release_mem_region(alg_data->base, I2C_PNX_REGION_SIZE);
+ release_mem_region(i2c_pnx->base, I2C_PNX_REGION_SIZE);
+out_clkget:
+ clk_put(alg_data->clk);
out_drvdata:
+ kfree(alg_data);
+err_kzalloc:
platform_set_drvdata(pdev, NULL);
out:
return ret;
@@ -666,15 +690,16 @@ out:
static int __devexit i2c_pnx_remove(struct platform_device *pdev)
{
- struct i2c_pnx_data *i2c_pnx = platform_get_drvdata(pdev);
- struct i2c_adapter *adap = i2c_pnx->adapter;
- struct i2c_pnx_algo_data *alg_data = adap->algo_data;
-
- free_irq(alg_data->irq, i2c_pnx->adapter);
- i2c_del_adapter(adap);
- i2c_pnx->set_clock_stop(pdev);
- iounmap((void *)alg_data->ioaddr);
- release_mem_region(alg_data->base, I2C_PNX_REGION_SIZE);
+ struct i2c_pnx_algo_data *alg_data = platform_get_drvdata(pdev);
+ struct i2c_pnx_data *i2c_pnx = alg_data->i2c_pnx;
+
+ free_irq(i2c_pnx->irq, alg_data);
+ i2c_del_adapter(&alg_data->adapter);
+ clk_disable(alg_data->clk);
+ iounmap(alg_data->ioaddr);
+ release_mem_region(i2c_pnx->base, I2C_PNX_REGION_SIZE);
+ clk_put(alg_data->clk);
+ kfree(alg_data);
platform_set_drvdata(pdev, NULL);
return 0;