On Fri, Aug 07, 2015 at 06:01:59PM +0800, Alison Wang wrote:
> This patch adds platform notifier for dma-coherent requirement.
> Structure arm_coherent_dma_ops is used instead of arm_dma_ops.
>
> Signed-off-by: Alison Wang <alison.w...@freescale.com>
> ---
> arch/arm/mach-imx/mach-ls1021a.c | 30 ++++++++++++++++++++++++++++++
> 1 file changed, 30 insertions(+)
>
> diff --git a/arch/arm/mach-imx/mach-ls1021a.c
> b/arch/arm/mach-imx/mach-ls1021a.c
> index b89c858..6bfc71b 100644
> --- a/arch/arm/mach-imx/mach-ls1021a.c
> +++ b/arch/arm/mach-imx/mach-ls1021a.c
> @@ -7,10 +7,39 @@
> * (at your option) any later version.
> */
>
> +#include <linux/dma-mapping.h>
> +#include <linux/of_platform.h>
> #include <asm/mach/arch.h>
>
> #include "common.h"
>
> +static int ls1021a_platform_notifier(struct notifier_block *nb,
> + unsigned long event, void *__dev)
> +{
> + struct device *dev = __dev;
> +
> + if (event != BUS_NOTIFY_ADD_DEVICE)
> + return NOTIFY_DONE;
> +
> + if (of_device_is_compatible(dev->of_node, "fsl,etsec2"))
> + set_dma_ops(dev, &arm_coherent_dma_ops);
Why cannot you simply add property dma-coherent for etsec2 node in
device tree? In that case, of_dma_configure() will just do the job from
of_platform_device_create_pdata().
Shawn
> + else if (of_property_read_bool(dev->of_node, "dma-coherent"))
> + set_dma_ops(dev, &arm_coherent_dma_ops);
> +
> + return NOTIFY_OK;
> +}
> +
> +static struct notifier_block ls1021a_platform_nb = {
> + .notifier_call = ls1021a_platform_notifier,
> +};
> +
> +static void __init ls1021a_init_machine(void)
> +{
> + bus_register_notifier(&platform_bus_type, &ls1021a_platform_nb);
> +
> + of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
> +}
> +
> static const char * const ls1021a_dt_compat[] __initconst = {
> "fsl,ls1021a",
> NULL,
> @@ -18,5 +47,6 @@ static const char * const ls1021a_dt_compat[] __initconst =
> {
>
> DT_MACHINE_START(LS1021A, "Freescale LS1021A")
> .smp = smp_ops(ls1021a_smp_ops),
> + .init_machine = ls1021a_init_machine,
> .dt_compat = ls1021a_dt_compat,
> MACHINE_END
> --
> 2.1.0.27.g96db324
>
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