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authorAndy Green <andy@warmcat.com>2011-05-30 07:43:07 -0700
committerBen Dooks <ben-linux@fluff.org>2011-10-29 09:37:08 +0100
commit4e80f727bf59e8c1ea8e47c45c9ef368d353d835 (patch)
treece1984cbc14dc5b143c86e30e2557ca594cb05af
parent6314f09e9517ed3d7d951525a111df858a6dd1a4 (diff)
downloadop-kernel-dev-4e80f727bf59e8c1ea8e47c45c9ef368d353d835.zip
op-kernel-dev-4e80f727bf59e8c1ea8e47c45c9ef368d353d835.tar.gz
I2C: OMAP2+: address confused probed version naming
The driver reflects the confusion that probed I2C revision from the hardware of 0x40 means it is on an OMAP4430. However, you will probe the same 0x40 ID on an OMAP3530. So this patch changes the name to reflect that. It also clarifies that the original name OMAP_I2C_REV_2 is referring to some ancient OMAP1 revision number, not to be confused with the IP revisions this patch series introduces. Similarly the term "rev" is used in the ancient OMAP1 ISR, the term is changed to use omap1 instead. Cc: patches@linaro.org Reported-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Andy Green <andy.green@linaro.org> Signed-off-by: Tony Lindgren <tony@atomide.com> Acked-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Kevin Hilman <khilman@ti.com>
-rw-r--r--drivers/i2c/busses/i2c-omap.c21
1 files changed, 12 insertions, 9 deletions
diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c
index e6792ab..0254da4 100644
--- a/drivers/i2c/busses/i2c-omap.c
+++ b/drivers/i2c/busses/i2c-omap.c
@@ -42,12 +42,12 @@
#include <linux/pm_runtime.h>
/* I2C controller revisions */
-#define OMAP_I2C_REV_2 0x20
+#define OMAP_I2C_OMAP1_REV_2 0x20
/* I2C controller revisions present on specific hardware */
#define OMAP_I2C_REV_ON_2430 0x36
#define OMAP_I2C_REV_ON_3430 0x3C
-#define OMAP_I2C_REV_ON_4430 0x40
+#define OMAP_I2C_REV_ON_3530_4430 0x40
/* timeout waiting for the controller to respond */
#define OMAP_I2C_TIMEOUT (msecs_to_jiffies(1000))
@@ -314,7 +314,7 @@ static void omap_i2c_idle(struct omap_i2c_dev *dev)
else
omap_i2c_write_reg(dev, OMAP_I2C_IE_REG, 0);
- if (dev->rev < OMAP_I2C_REV_2) {
+ if (dev->rev < OMAP_I2C_OMAP1_REV_2) {
iv = omap_i2c_read_reg(dev, OMAP_I2C_IV_REG); /* Read clears */
} else {
omap_i2c_write_reg(dev, OMAP_I2C_STAT_REG, dev->iestate);
@@ -336,7 +336,7 @@ static int omap_i2c_init(struct omap_i2c_dev *dev)
unsigned long internal_clk = 0;
struct clk *fclk;
- if (dev->rev >= OMAP_I2C_REV_2) {
+ if (dev->rev >= OMAP_I2C_OMAP1_REV_2) {
/* Disable I2C controller before soft reset */
omap_i2c_write_reg(dev, OMAP_I2C_CON_REG,
omap_i2c_read_reg(dev, OMAP_I2C_CON_REG) &
@@ -379,7 +379,9 @@ static int omap_i2c_init(struct omap_i2c_dev *dev)
* REVISIT: Some wkup sources might not be needed.
*/
dev->westate = OMAP_I2C_WE_ALL;
- omap_i2c_write_reg(dev, OMAP_I2C_WE_REG, dev->westate);
+ if (dev->rev < OMAP_I2C_REV_ON_3530_4430)
+ omap_i2c_write_reg(dev, OMAP_I2C_WE_REG,
+ dev->westate);
}
}
omap_i2c_write_reg(dev, OMAP_I2C_CON_REG, 0);
@@ -721,7 +723,7 @@ static inline void i2c_omap_errata_i207(struct omap_i2c_dev *dev, u16 stat)
#ifdef CONFIG_ARCH_OMAP15XX
static irqreturn_t
-omap_i2c_rev1_isr(int this_irq, void *dev_id)
+omap_i2c_omap1_isr(int this_irq, void *dev_id)
{
struct omap_i2c_dev *dev = dev_id;
u16 iv, w;
@@ -775,7 +777,7 @@ omap_i2c_rev1_isr(int this_irq, void *dev_id)
return IRQ_HANDLED;
}
#else
-#define omap_i2c_rev1_isr NULL
+#define omap_i2c_omap1_isr NULL
#endif
/*
@@ -1060,7 +1062,7 @@ omap_i2c_probe(struct platform_device *pdev)
* size. This is to ensure that we can handle the status on int
* call back latencies.
*/
- if (dev->rev >= OMAP_I2C_REV_ON_4430) {
+ if (dev->rev >= OMAP_I2C_REV_ON_3530_4430) {
dev->fifo_size = 0;
dev->b_hw = 0; /* Disable hardware fixes */
} else {
@@ -1076,7 +1078,8 @@ omap_i2c_probe(struct platform_device *pdev)
/* reset ASAP, clearing any IRQs */
omap_i2c_init(dev);
- isr = (dev->rev < OMAP_I2C_REV_2) ? omap_i2c_rev1_isr : omap_i2c_isr;
+ isr = (dev->rev < OMAP_I2C_OMAP1_REV_2) ? omap_i2c_omap1_isr :
+ omap_i2c_isr;
r = request_irq(dev->irq, isr, 0, pdev->name, dev);
if (r) {
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