On Mon, May 20, 2013 at 12:21:33PM +0530, Girish K S wrote: > From: Girish K S <[email protected]> > > The existing driver supports gpio based /cs signal. > For controller's that have one device per controller, > the slave device's /cs signal might be internally controlled > by the chip select bit of slave select register. They are not > externally asserted/deasserted using gpio pin. > > This patch adds support for controllers with dedicated /cs pin. > if "cs-gpio" property doesnt exist in a spi dts node, the controller > would treat the /cs pin as dedicated.
This breaks SPI operation on my s3c64xx based system since...
> if (pdev->dev.of_node) {
> + if (of_find_property(pdev->dev.of_node, "cs-gpio", NULL))
> + sdd->cs_gpio = true;
> +
> ret = of_alias_get_id(pdev->dev.of_node, "spi");
> if (ret < 0) {
> dev_err(&pdev->dev, "failed to get alias id, errno
> %d\n",
sdd->cs_gpio is only set to true by this code so if you're using a board
file then the GPIO will be ignored.
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