Re: [PATCH 3/4] spi: Add OF binding support for SPI busses

Anton Vorontsov
2008-05-21T15:19:42Z

On Fri, May 16, 2008 at 01:36:13PM -0600, Grant Likely wrote:
> From: Grant Likely <grant.likely@secretlab.ca>
>
> This patch adds support for populating an SPI bus based on data in the
> OF device tree. This is useful for powerpc platforms which use the
> device tree instead of discrete code for describing platform layout.
>
> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
> ---
[...]
> diff --git a/drivers/spi/spi_of.c b/drivers/spi/spi_of.c
> new file mode 100644
> index 0000000..b5ae434
> --- /dev/null
> +++ b/drivers/spi/spi_of.c
> @@ -0,0 +1,86 @@
> +/*

I think better placement for this is drivers/of, no?

> + * SPI OF support routines
> + * Copyright (C) 2008 Secret Lab Technologies Ltd.
> + *
> + * Support routines for deriving SPI device attachments from the device
> + * tree.
> + */
> +
> +#include <linux/of.h>
> +#include <linux/device.h>
> +#include <linux/spi/spi.h>
> +#include <linux/spi/spi_of.h>
> +
> +/**
> + * spi_of_register_devices - Register child devices onto the SPI bus
> + * @master: Pointer to spi_master device
> + * @np: parent node of SPI device nodes
> + *
> + * Registers an spi_device for each child node of 'np' which has a 'reg'
> + * property.
> + */
> +void spi_of_register_devices(struct spi_master *master, struct device_node *np)
> +{
> + struct spi_device *spi;
> + struct device_node *nc;
> + const u32 *prop;
> + const char *sprop;
> + int rc;
> + int len;
> +
> + for_each_child_of_node(np, nc) {
> + /* Alloc an spi_device */
> + spi = spi_alloc_device(master);
> + if (!spi) {
> + dev_err(&master->dev, "spi_device alloc error for %s\n",
> + np->full_name);
> + continue;
> + }
> +
> + /* Device address */
> + prop = of_get_property(nc, "reg", &len);
> + if (!prop || len < sizeof(*prop)) {
> + dev_err(&master->dev, "%s has no 'reg' property\n",
> + np->full_name);

Should be nc->full_name.

> + continue;
> + }
[...]

--
Anton Vorontsov
email: cbouatmailru@gmail.com
irc://irc.freenode.net/bd2