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authorChaithrika U S <chaithrika@ti.com>2010-01-06 14:54:57 +0530
committerKevin Hilman <khilman@deeprootsystems.com>2010-08-05 09:38:32 -0700
commitc062a2518d35a76e7db8519b2292191a47e3ab79 (patch)
treecccb35369448083708cd3e32f210f9b10275ecaa /drivers/i2c
parentc6c7c729a22bfeb8e63eafce48dbaeea20e68703 (diff)
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i2c: davinci: misc. cleanups: remove MOD_REG_BIT and IO_ADDRESS usage
Cleanup the DaVinci I2C driver. Remove MOD_REG_BIT macro. Also use ioremap instead of IO_ADDRESS macro. Signed-off-by: Chaithrika U S <chaithrika@ti.com> Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
Diffstat (limited to 'drivers/i2c')
-rw-r--r--drivers/i2c/busses/i2c-davinci.c77
1 files changed, 38 insertions, 39 deletions
diff --git a/drivers/i2c/busses/i2c-davinci.c b/drivers/i2c/busses/i2c-davinci.c
index 43913c1d50f5..4e33909dd3f0 100644
--- a/drivers/i2c/busses/i2c-davinci.c
+++ b/drivers/i2c/busses/i2c-davinci.c
@@ -38,7 +38,6 @@
#include <linux/slab.h>
#include <mach/hardware.h>
-
#include <mach/i2c.h>
/* ----- global defines ----------------------------------------------- */
@@ -72,37 +71,29 @@
#define DAVINCI_I2C_IVR_NACK 0x02
#define DAVINCI_I2C_IVR_AL 0x01
-#define DAVINCI_I2C_STR_BB (1 << 12)
-#define DAVINCI_I2C_STR_RSFULL (1 << 11)
-#define DAVINCI_I2C_STR_SCD (1 << 5)
-#define DAVINCI_I2C_STR_ARDY (1 << 2)
-#define DAVINCI_I2C_STR_NACK (1 << 1)
-#define DAVINCI_I2C_STR_AL (1 << 0)
-
-#define DAVINCI_I2C_MDR_NACK (1 << 15)
-#define DAVINCI_I2C_MDR_STT (1 << 13)
-#define DAVINCI_I2C_MDR_STP (1 << 11)
-#define DAVINCI_I2C_MDR_MST (1 << 10)
-#define DAVINCI_I2C_MDR_TRX (1 << 9)
-#define DAVINCI_I2C_MDR_XA (1 << 8)
-#define DAVINCI_I2C_MDR_RM (1 << 7)
-#define DAVINCI_I2C_MDR_IRS (1 << 5)
-
-#define DAVINCI_I2C_IMR_AAS (1 << 6)
-#define DAVINCI_I2C_IMR_SCD (1 << 5)
-#define DAVINCI_I2C_IMR_XRDY (1 << 4)
-#define DAVINCI_I2C_IMR_RRDY (1 << 3)
-#define DAVINCI_I2C_IMR_ARDY (1 << 2)
-#define DAVINCI_I2C_IMR_NACK (1 << 1)
-#define DAVINCI_I2C_IMR_AL (1 << 0)
-
-#define MOD_REG_BIT(val, mask, set) do { \
- if (set) { \
- val |= mask; \
- } else { \
- val &= ~mask; \
- } \
-} while (0)
+#define DAVINCI_I2C_STR_BB BIT(12)
+#define DAVINCI_I2C_STR_RSFULL BIT(11)
+#define DAVINCI_I2C_STR_SCD BIT(5)
+#define DAVINCI_I2C_STR_ARDY BIT(2)
+#define DAVINCI_I2C_STR_NACK BIT(1)
+#define DAVINCI_I2C_STR_AL BIT(0)
+
+#define DAVINCI_I2C_MDR_NACK BIT(15)
+#define DAVINCI_I2C_MDR_STT BIT(13)
+#define DAVINCI_I2C_MDR_STP BIT(11)
+#define DAVINCI_I2C_MDR_MST BIT(10)
+#define DAVINCI_I2C_MDR_TRX BIT(9)
+#define DAVINCI_I2C_MDR_XA BIT(8)
+#define DAVINCI_I2C_MDR_RM BIT(7)
+#define DAVINCI_I2C_MDR_IRS BIT(5)
+
+#define DAVINCI_I2C_IMR_AAS BIT(6)
+#define DAVINCI_I2C_IMR_SCD BIT(5)
+#define DAVINCI_I2C_IMR_XRDY BIT(4)
+#define DAVINCI_I2C_IMR_RRDY BIT(3)
+#define DAVINCI_I2C_IMR_ARDY BIT(2)
+#define DAVINCI_I2C_IMR_NACK BIT(1)
+#define DAVINCI_I2C_IMR_AL BIT(0)
struct davinci_i2c_dev {
struct device *dev;
@@ -156,7 +147,7 @@ static int i2c_davinci_init(struct davinci_i2c_dev *dev)
/* put I2C into reset */
w = davinci_i2c_read_reg(dev, DAVINCI_I2C_MDR_REG);
- MOD_REG_BIT(w, DAVINCI_I2C_MDR_IRS, 0);
+ w &= ~DAVINCI_I2C_MDR_IRS;
davinci_i2c_write_reg(dev, DAVINCI_I2C_MDR_REG, w);
/* NOTE: I2C Clock divider programming info
@@ -206,7 +197,7 @@ static int i2c_davinci_init(struct davinci_i2c_dev *dev)
/* Take the I2C module out of reset: */
w = davinci_i2c_read_reg(dev, DAVINCI_I2C_MDR_REG);
- MOD_REG_BIT(w, DAVINCI_I2C_MDR_IRS, 1);
+ w |= DAVINCI_I2C_MDR_IRS;
davinci_i2c_write_reg(dev, DAVINCI_I2C_MDR_REG, w);
/* Enable interrupts */
@@ -288,9 +279,9 @@ i2c_davinci_xfer_msg(struct i2c_adapter *adap, struct i2c_msg *msg, int stop)
/* Enable receive or transmit interrupts */
w = davinci_i2c_read_reg(dev, DAVINCI_I2C_IMR_REG);
if (msg->flags & I2C_M_RD)
- MOD_REG_BIT(w, DAVINCI_I2C_IMR_RRDY, 1);
+ w |= DAVINCI_I2C_IMR_RRDY;
else
- MOD_REG_BIT(w, DAVINCI_I2C_IMR_XRDY, 1);
+ w |= DAVINCI_I2C_IMR_XRDY;
davinci_i2c_write_reg(dev, DAVINCI_I2C_IMR_REG, w);
dev->terminate = 0;
@@ -349,7 +340,7 @@ i2c_davinci_xfer_msg(struct i2c_adapter *adap, struct i2c_msg *msg, int stop)
return msg->len;
if (stop) {
w = davinci_i2c_read_reg(dev, DAVINCI_I2C_MDR_REG);
- MOD_REG_BIT(w, DAVINCI_I2C_MDR_STP, 1);
+ w |= DAVINCI_I2C_MDR_STP;
davinci_i2c_write_reg(dev, DAVINCI_I2C_MDR_REG, w);
}
return -EREMOTEIO;
@@ -485,7 +476,7 @@ static irqreturn_t i2c_davinci_isr(int this_irq, void *dev_id)
w = davinci_i2c_read_reg(dev,
DAVINCI_I2C_IMR_REG);
- MOD_REG_BIT(w, DAVINCI_I2C_IMR_XRDY, 0);
+ w &= ~DAVINCI_I2C_IMR_XRDY;
davinci_i2c_write_reg(dev,
DAVINCI_I2C_IMR_REG,
w);
@@ -564,7 +555,12 @@ static int davinci_i2c_probe(struct platform_device *pdev)
}
clk_enable(dev->clk);
- dev->base = (void __iomem *)IO_ADDRESS(mem->start);
+ dev->base = ioremap(mem->start, resource_size(mem));
+ if (!dev->base) {
+ r = -EBUSY;
+ goto err_mem_ioremap;
+ }
+
i2c_davinci_init(dev);
r = request_irq(dev->irq, i2c_davinci_isr, 0, pdev->name, dev);
@@ -594,6 +590,8 @@ static int davinci_i2c_probe(struct platform_device *pdev)
err_free_irq:
free_irq(dev->irq, dev);
err_unuse_clocks:
+ iounmap(dev->base);
+err_mem_ioremap:
clk_disable(dev->clk);
clk_put(dev->clk);
dev->clk = NULL;
@@ -622,6 +620,7 @@ static int davinci_i2c_remove(struct platform_device *pdev)
davinci_i2c_write_reg(dev, DAVINCI_I2C_MDR_REG, 0);
free_irq(IRQ_I2C, dev);
+ iounmap(dev->base);
kfree(dev);
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);