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);
+ 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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