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authorWolfgang Grandegger <wg@grandegger.com>2010-05-17 22:39:48 -0700
committerDavid S. Miller <davem@davemloft.net>2010-05-17 22:39:48 -0700
commit56e6943b902562e09d3e74126d8d8256b5ea17fb (patch)
tree3b37d2e1382a666152b7c655a67b4f7b785c142f
parentd19d56ddc88e7895429ef118db9c83c7bbe3ce6a (diff)
downloadop-kernel-dev-56e6943b902562e09d3e74126d8d8256b5ea17fb.zip
op-kernel-dev-56e6943b902562e09d3e74126d8d8256b5ea17fb.tar.gz
can: sja1000 platform data fixes
The member "clock" of struct "sja1000_platform_data" is documented as "CAN bus oscillator frequency in Hz" but it's actually used as the CAN clock frequency, which is half of it. To avoid further confusion, this patch fixes it by renaming the member to "osc_freq". That way, also non mainline users will notice the change. The platform code for the relevant boards is updated accordingly. Furthermore, pre-defined values are now used for the members "ocr" and "cdr". Signed-off-by: Wolfgang Grandegger <wg@grandegger.com> Acked-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--arch/arm/mach-mx2/pcm970-baseboard.c6
-rw-r--r--arch/arm/mach-mx3/mach-pcm037.c6
-rw-r--r--drivers/net/can/sja1000/sja1000_platform.c3
-rw-r--r--include/linux/can/platform/sja1000.h2
4 files changed, 9 insertions, 8 deletions
diff --git a/arch/arm/mach-mx2/pcm970-baseboard.c b/arch/arm/mach-mx2/pcm970-baseboard.c
index 4aafd5b..f490a40 100644
--- a/arch/arm/mach-mx2/pcm970-baseboard.c
+++ b/arch/arm/mach-mx2/pcm970-baseboard.c
@@ -201,9 +201,9 @@ static struct resource pcm970_sja1000_resources[] = {
};
struct sja1000_platform_data pcm970_sja1000_platform_data = {
- .clock = 16000000 / 2,
- .ocr = 0x40 | 0x18,
- .cdr = 0x40,
+ .osc_freq = 16000000,
+ .ocr = OCR_TX1_PULLDOWN | OCR_TX0_PUSHPULL,
+ .cdr = CDR_CBP,
};
static struct platform_device pcm970_sja1000 = {
diff --git a/arch/arm/mach-mx3/mach-pcm037.c b/arch/arm/mach-mx3/mach-pcm037.c
index 2df1ec5..78ecd75 100644
--- a/arch/arm/mach-mx3/mach-pcm037.c
+++ b/arch/arm/mach-mx3/mach-pcm037.c
@@ -530,9 +530,9 @@ static struct resource pcm970_sja1000_resources[] = {
};
struct sja1000_platform_data pcm970_sja1000_platform_data = {
- .clock = 16000000 / 2,
- .ocr = 0x40 | 0x18,
- .cdr = 0x40,
+ .osc_freq = 16000000,
+ .ocr = OCR_TX1_PULLDOWN | OCR_TX0_PUSHPULL,
+ .cdr = CDR_CBP,
};
static struct platform_device pcm970_sja1000 = {
diff --git a/drivers/net/can/sja1000/sja1000_platform.c b/drivers/net/can/sja1000/sja1000_platform.c
index b65cabb..d9fadc4 100644
--- a/drivers/net/can/sja1000/sja1000_platform.c
+++ b/drivers/net/can/sja1000/sja1000_platform.c
@@ -111,7 +111,8 @@ static int sp_probe(struct platform_device *pdev)
dev->irq = res_irq->start;
priv->irq_flags = res_irq->flags & (IRQF_TRIGGER_MASK | IRQF_SHARED);
priv->reg_base = addr;
- priv->can.clock.freq = pdata->clock;
+ /* The CAN clock frequency is half the oscillator clock frequency */
+ priv->can.clock.freq = pdata->osc_freq / 2;
priv->ocr = pdata->ocr;
priv->cdr = pdata->cdr;
diff --git a/include/linux/can/platform/sja1000.h b/include/linux/can/platform/sja1000.h
index 01ee2ae..96f8fcc 100644
--- a/include/linux/can/platform/sja1000.h
+++ b/include/linux/can/platform/sja1000.h
@@ -26,7 +26,7 @@
#define OCR_TX_SHIFT 2
struct sja1000_platform_data {
- u32 clock; /* CAN bus oscillator frequency in Hz */
+ u32 osc_freq; /* CAN bus oscillator frequency in Hz */
u8 ocr; /* output control register */
u8 cdr; /* clock divider register */
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