This patch converts the i2c driver to use omap_device/omap_hwmod.
Signed-off-by: Rajendra Nayak <rnayak@xxxxxx>
---
drivers/i2c/busses/i2c-omap.c | 83 ++++++++++++++++-------------------------
1 files changed, 32 insertions(+), 51 deletions(-)
diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c
index bbea8a0..0334225 100644
--- a/drivers/i2c/busses/i2c-omap.c
+++ b/drivers/i2c/busses/i2c-omap.c
@@ -2,7 +2,7 @@
* TI OMAP I2C master mode driver
*
* Copyright (C) 2003 MontaVista Software, Inc.
- * Copyright (C) 2005 Nokia Corporation
+ * Copyright (C) 2005, 2009 Nokia Corporation
* Copyright (C) 2004 - 2007 Texas Instruments.
*
* Originally written by MontaVista Software, Inc.
@@ -26,6 +26,10 @@
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * To do:
+ * - Add DMA for transfers longer than the FIFO
+ *
*/
#include <linux/module.h>
@@ -39,6 +43,8 @@
#include <linux/io.h>
#include <linux/i2c-omap.h>
+#include <plat/i2c.h>
+
/* I2C controller revisions */
#define OMAP_I2C_REV_2 0x20
@@ -162,8 +168,6 @@ struct omap_i2c_dev {
struct device *dev;
void __iomem *base; /* virtual */
int irq;
- struct clk *iclk; /* Interface clock */
- struct clk *fclk; /* Functional clock */
struct completion cmd_complete;
struct resource *ioarea;
u32 latency; /* maximum mpu wkup latency */
@@ -201,45 +205,19 @@ static inline u16 omap_i2c_read_reg(struct omap_i2c_dev *i2c_dev, int reg)
return __raw_readw(i2c_dev->base + reg);
}
-static int __init omap_i2c_get_clocks(struct omap_i2c_dev *dev)
+static void omap_i2c_unidle(struct omap_i2c_dev *dev)
{
- int ret;
-
- dev->iclk = clk_get(dev->dev, "ick");
- if (IS_ERR(dev->iclk)) {
- ret = PTR_ERR(dev->iclk);
- dev->iclk = NULL;
- return ret;
- }
+ struct platform_device *pdev;
+ struct omap_i2c_platform_data *pdata;
- dev->fclk = clk_get(dev->dev, "fck");
- if (IS_ERR(dev->fclk)) {
- ret = PTR_ERR(dev->fclk);
- if (dev->iclk != NULL) {
- clk_put(dev->iclk);
- dev->iclk = NULL;
- }
- dev->fclk = NULL;
- return ret;
- }
-
- return 0;
-}
+ WARN_ON(!dev->idle);
-static void omap_i2c_put_clocks(struct omap_i2c_dev *dev)
-{
- clk_put(dev->fclk);
- dev->fclk = NULL;
- clk_put(dev->iclk);
- dev->iclk = NULL;
-}
+ pdev = container_of(dev->dev, struct platform_device, dev);
+ pdata = pdev->dev.platform_data;
-static void omap_i2c_unidle(struct omap_i2c_dev *dev)
-{
- WARN_ON(!dev->idle);
+ if (pdata->device_enable)
+ pdata->device_enable(pdev);
- clk_enable(dev->iclk);
- clk_enable(dev->fclk);
if (cpu_is_omap34xx()) {
omap_i2c_write_reg(dev, OMAP_I2C_CON_REG, 0);
omap_i2c_write_reg(dev, OMAP_I2C_PSC_REG, dev->pscstate);
@@ -256,10 +234,15 @@ static void omap_i2c_unidle(struct omap_i2c_dev *dev)
static void omap_i2c_idle(struct omap_i2c_dev *dev)
{
+ struct platform_device *pdev;
+ struct omap_i2c_platform_data *pdata;
u16 iv;
WARN_ON(dev->idle);
+ pdev = container_of(dev->dev, struct platform_device, dev);
+ pdata = pdev->dev.platform_data;
+
dev->iestate = omap_i2c_read_reg(dev, OMAP_I2C_IE_REG);
omap_i2c_write_reg(dev, OMAP_I2C_IE_REG, 0);
if (dev->rev < OMAP_I2C_REV_2) {
@@ -271,8 +254,8 @@ static void omap_i2c_idle(struct omap_i2c_dev *dev)
omap_i2c_read_reg(dev, OMAP_I2C_STAT_REG);
}
dev->idle = 1;
- clk_disable(dev->fclk);
- clk_disable(dev->iclk);
+ if (pdata->device_idle)
+ pdata->device_idle(pdev);
}
static int omap_i2c_init(struct omap_i2c_dev *dev)
@@ -282,6 +265,7 @@ static int omap_i2c_init(struct omap_i2c_dev *dev)
unsigned long fclk_rate = 12000000;
unsigned long timeout;
unsigned long internal_clk = 0;
+ struct clk *fclk;
if (dev->rev >= OMAP_I2C_REV_2) {
omap_i2c_write_reg(dev, OMAP_I2C_SYSC_REG, SYSC_SOFTRESET_MASK);
@@ -333,7 +317,8 @@ static int omap_i2c_init(struct omap_i2c_dev *dev)
* always returns 12MHz for the functional clock, we can
* do this bit unconditionally.
*/
- fclk_rate = clk_get_rate(dev->fclk);
+ fclk = clk_get(dev->dev, "fck");
+ fclk_rate = clk_get_rate(fclk);
/* TRM for 5912 says the I2C clock must be prescaled to be
* between 7 - 12 MHz. The XOR input clock is typically
@@ -349,7 +334,6 @@ static int omap_i2c_init(struct omap_i2c_dev *dev)
}
if (cpu_is_omap2430() || cpu_is_omap34xx()) {
-
/*
* HSI2C controller internal clk rate should be 19.2 Mhz for
* HS and for all modes on 2430. On 34xx we can use lower rate
@@ -362,7 +346,8 @@ static int omap_i2c_init(struct omap_i2c_dev *dev)
internal_clk = 9600;
else
internal_clk = 4000;
- fclk_rate = clk_get_rate(dev->fclk) / 1000;
+ fclk = clk_get(dev->dev, "fck");
+ fclk_rate = clk_get_rate(fclk) / 1000;
/* Compute prescaler divisor */
psc = fclk_rate / internal_clk;
@@ -852,10 +837,10 @@ omap_i2c_probe(struct platform_device *pdev)
struct omap_i2c_dev *dev;
struct i2c_adapter *adap;
struct resource *mem, *irq, *ioarea;
- struct omap_i2c_bus_platform_data *pdata = pdev->dev.platform_data;
irq_handler_t isr;
int r;
u32 speed = 0;
+ struct omap_i2c_platform_data *pdata;
/* NOTE: driver uses the static register mapping */
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -882,8 +867,10 @@ omap_i2c_probe(struct platform_device *pdev)
goto err_release_region;
}
- if (pdata != NULL) {
- speed = pdata->clkrate;
+ pdata = pdev->dev.platform_data;
+
+ if (pdata->rate) {
+ speed = pdata->rate;
dev->set_mpu_wkup_lat = pdata->set_mpu_wkup_lat;
} else {
speed = 100; /* Default speed */
@@ -902,9 +889,6 @@ omap_i2c_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, dev);
- if ((r = omap_i2c_get_clocks(dev)) != 0)
- goto err_iounmap;
-
omap_i2c_unidle(dev);
dev->rev = omap_i2c_read_reg(dev, OMAP_I2C_REV_REG) & 0xff;
@@ -969,8 +953,6 @@ err_free_irq:
err_unuse_clocks:
omap_i2c_write_reg(dev, OMAP_I2C_CON_REG, 0);
omap_i2c_idle(dev);
- omap_i2c_put_clocks(dev);
-err_iounmap:
iounmap(dev->base);
err_free_mem:
platform_set_drvdata(pdev, NULL);
@@ -992,7 +974,6 @@ omap_i2c_remove(struct platform_device *pdev)
free_irq(dev->irq, dev);
i2c_del_adapter(&dev->adapter);
omap_i2c_write_reg(dev, OMAP_I2C_CON_REG, 0);
- omap_i2c_put_clocks(dev);
iounmap(dev->base);
kfree(dev);
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
--
1.5.4.7
--
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