Re: [PATCH 1/5] i2c: Convert i2c-octeon.c to use device tree.

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On 03/26/2012 06:20 PM, Rob Herring wrote:
[...]
---

Should probably go via Ralf's linux-mips.org tree.

  arch/mips/cavium-octeon/octeon-irq.c      |    2 -
  arch/mips/cavium-octeon/octeon-platform.c |   84 -------------------------
  arch/mips/include/asm/octeon/octeon.h     |    5 --
  drivers/i2c/busses/i2c-octeon.c           |   94 ++++++++++++++++-------------
  4 files changed, 52 insertions(+), 133 deletions(-)

snip


-	if (i2c_data == NULL) {
-		dev_err(i2c->dev, "no I2C frequency data\n");
+	/*
+	 * "clock-rate" is a legacy binding, the official binding is
+	 * "clock-frequency".  Try the official one first and then
+	 * fall back if it doesn't exist.
+	 */
+	data = of_get_property(pdev->dev.of_node, "clock-frequency",&len);
+	if (!data || len != sizeof(*data))
+		data = of_get_property(pdev->dev.of_node, "clock-rate",&len);
+	if (data&&  len == sizeof(*data)) {
+		i2c->twsi_freq = be32_to_cpup(data);

Can't you use of_property_read_u32?

I will investigate, and use it if possible.


Does the legacy binding really exist as DT support is new?


Yes, unfortunately some bootloaders escaped into the wild with the "clock-rate" binding.

Otherwise,

Acked-by: Rob Herring<rob.herring@xxxxxxxxxxx>


Thanks,




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