Merge two functions into one. The result is smaller as they can now share some
variables.
Signed-off-by: Wolfram Sang <w.s...@pengutronix.de>
---
drivers/net/can/mscan/mpc52xx_can.c | 45 ++++++++++++----------------------
1 files changed, 16 insertions(+), 29 deletions(-)
diff --git a/drivers/net/can/mscan/mpc52xx_can.c
b/drivers/net/can/mscan/mpc52xx_can.c
index 34ae2ba..a915959 100644
--- a/drivers/net/can/mscan/mpc52xx_can.c
+++ b/drivers/net/can/mscan/mpc52xx_can.c
@@ -38,28 +38,37 @@
static struct of_device_id mpc52xx_cdm_ids[] __devinitdata = {
{ .compatible = "fsl,mpc5200-cdm", },
- { .compatible = "fsl,mpc5200b-cdm", },
{}
};
/*
- * Get the frequency of the external oscillator clock connected
- * to the SYS_XTAL_IN pin, or return 0 if it cannot be determined.
+ * Get frequency of the MSCAN clock source
+ *
+ * Either the oscillator clock (SYS_XTAL_IN) or the IP bus clock (IP_CLK)
+ * can be selected. According to the MPC5200 user's manual, the oscillator
+ * clock is the better choice as it has less jitter but due to a hardware
+ * bug, it can not be selected for the old MPC5200 Rev. A chips.
*/
-static unsigned int __devinit mpc52xx_can_xtal_freq(struct of_device *of)
+
+static unsigned int __devinit mpc52xx_can_clock_freq(struct of_device *of,
+ int clock_src)
{
+ unsigned int pvr;
struct mpc52xx_cdm __iomem *cdm;
struct device_node *np_cdm;
unsigned int freq;
u32 val;
+ pvr = mfspr(SPRN_PVR);
+
freq = mpc5xxx_get_bus_frequency(of->node);
if (!freq)
return 0;
- /*
- * Determine SYS_XTAL_IN frequency from the clock domain settings
- */
+ if (clock_src == MSCAN_CLKSRC_BUS || pvr == 0x80822011)
+ return freq;
+
+ /* Determine SYS_XTAL_IN frequency from the clock domain settings */
np_cdm = of_find_matching_node(NULL, mpc52xx_cdm_ids);
if (!np_cdm) {
dev_err(&of->dev, "can't get clock node!\n");
@@ -80,28 +89,6 @@ static unsigned int __devinit mpc52xx_can_xtal_freq(struct
of_device *of)
return freq;
}
-/*
- * Get frequency of the MSCAN clock source
- *
- * Either the oscillator clock (SYS_XTAL_IN) or the IP bus clock (IP_CLK)
- * can be selected. According to the MPC5200 user's manual, the oscillator
- * clock is the better choice as it has less jitter but due to a hardware
- * bug, it can not be selected for the old MPC5200 Rev. A chips.
- */
-
-static unsigned int __devinit mpc52xx_can_clock_freq(struct of_device *of,
- int clock_src)
-{
- unsigned int pvr;
-
- pvr = mfspr(SPRN_PVR);
-
- if (clock_src == MSCAN_CLKSRC_BUS || pvr == 0x80822011)
- return mpc5xxx_get_bus_frequency(of->node);
-
- return mpc52xx_can_xtal_freq(of);
-}
-
static int __devinit mpc5xxx_can_probe(struct of_device *ofdev,
const struct of_device_id *id)
{
--
1.6.3.3
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