Hi, Shawn,
> 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 <[email protected]> > > --- > > 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(). [Alison Wang] Yes, you are right. I will change in v2. Thanks. > > 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 > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
