[cc'ing Ben Dooks, embedded i2c maintainer]
On Tue, Feb 22, 2011 at 10:49 AM, Michal Simek <monstr@xxxxxxxxx> wrote:
> Add OF support to Xilinx i2c bus interface.
> It is used on Microblaze systems.
>
> Signed-off-by: Michal Simek <monstr@xxxxxxxxx>
Acked-by: Grant Likely <grant.likely@xxxxxxxxxxxx>
Ben, since this one depends on a patch in my tree, do you want me to pick it up?
g.
> ---
> drivers/i2c/busses/i2c-xiic.c | 37 +++++++++++++++++++++++++++++--------
> 1 files changed, 29 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/i2c/busses/i2c-xiic.c b/drivers/i2c/busses/i2c-xiic.c
> index a9c419e..0b7647b 100644
> --- a/drivers/i2c/busses/i2c-xiic.c
> +++ b/drivers/i2c/busses/i2c-xiic.c
> @@ -41,6 +41,11 @@
> #include <linux/io.h>
> #include <linux/slab.h>
>
> +#include <linux/of.h>
> +#include <linux/of_platform.h>
> +#include <linux/of_i2c.h>
> +#include <linux/of_address.h>
Nit: This should not be separate from the rest of the include block.
The blank line between slab.h and of.h can be dropped.
> +
> #define DRIVER_NAME "xiic-i2c"
>
> enum xilinx_i2c_state {
> @@ -426,7 +431,7 @@ static void xiic_process(struct xiic_i2c *i2c)
> xiic_wakeup(i2c, STATE_ERROR);
>
> } else if (pend & (XIIC_INTR_TX_EMPTY_MASK | XIIC_INTR_TX_HALF_MASK)) {
> - /* Transmit register/FIFO is empty or ½ empty */
> + /* Transmit register/FIFO is empty or 1/2 empty */
>
> clr = pend &
> (XIIC_INTR_TX_EMPTY_MASK | XIIC_INTR_TX_HALF_MASK);
> @@ -704,10 +709,6 @@ static int __devinit xiic_i2c_probe(struct platform_device *pdev)
> if (irq < 0)
> goto resource_missing;
>
> - pdata = (struct xiic_i2c_platform_data *) pdev->dev.platform_data;
> - if (!pdata)
> - return -EINVAL;
> -
> i2c = kzalloc(sizeof(*i2c), GFP_KERNEL);
> if (!i2c)
> return -ENOMEM;
> @@ -730,6 +731,7 @@ static int __devinit xiic_i2c_probe(struct platform_device *pdev)
> i2c->adap = xiic_adapter;
> i2c_set_adapdata(&i2c->adap, i2c);
> i2c->adap.dev.parent = &pdev->dev;
> + i2c->adap.dev.of_node = of_node_get(pdev->dev.of_node);
>
> xiic_reinit(i2c);
>
> @@ -748,9 +750,16 @@ static int __devinit xiic_i2c_probe(struct platform_device *pdev)
> goto add_adapter_failed;
> }
>
> - /* add in known devices to the bus */
> - for (i = 0; i < pdata->num_devices; i++)
> - i2c_new_device(&i2c->adap, pdata->devices + i);
> + dev_info(&pdev->dev, "mapped to 0x%08X, irq=%d\n",
> + (unsigned int)i2c->base, irq);
> +
> + pdata = (struct xiic_i2c_platform_data *) pdev->dev.platform_data;
While you're touching this code anyway, the cast is unnecessary.
> + if (pdata) {
> + /* add in known devices to the bus */
> + for (i = 0; i < pdata->num_devices; i++)
> + i2c_new_device(&i2c->adap, pdata->devices + i);
> + }
> + of_i2c_register_devices(&i2c->adap);
>
> return 0;
>
> @@ -799,12 +808,24 @@ static int __devexit xiic_i2c_remove(struct platform_device* pdev)
> /* work with hotplug and coldplug */
> MODULE_ALIAS("platform:"DRIVER_NAME);
>
> +#ifdef CONFIG_OF
> +/* Match table for of_platform binding */
> +static struct of_device_id __devinitdata xilinx_iic_of_match[] = {
> + { .compatible = "xlnx,xps-iic-2.00.a", },
> + {},
> +};
> +MODULE_DEVICE_TABLE(of, xilinx_iic_of_match);
> +#else
> +# define xilinx_iic_of_match NULL
> +#endif
> +
> static struct platform_driver xiic_i2c_driver = {
> .probe = xiic_i2c_probe,
> .remove = __devexit_p(xiic_i2c_remove),
> .driver = {
> .owner = THIS_MODULE,
> .name = DRIVER_NAME,
> + .of_match_table = xilinx_iic_of_match,
> },
> };
>
> --
> 1.5.5.6
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@xxxxxxxxxxxxxxx
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
>
--
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.
--
To unsubscribe from this list: send the line "unsubscribe linux-i2c" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
