layerscape: add 64b/32b target for ls1043ardb device

[openwrt/staging/yousong.git] / target / linux / layerscape / patches-4.4 / 3032-arm64-Add-pdev_archdata-for-dmamask.patch

diff --git a/target/linux/layerscape/patches-4.4/3032-arm64-Add-pdev_archdata-for-dmamask.patch b/target/linux/layerscape/patches-4.4/3032-arm64-Add-pdev_archdata-for-dmamask.patch
new file mode 100644 (file)
index 0000000..5246872
--- /dev/null
+++ b/target/linux/layerscape/patches-4.4/3032-arm64-Add-pdev_archdata-for-dmamask.patch
@@ -0,0 +1,51 @@
+From f7e48669bb75f3b52e9f3ce1a5d885c49b7c4712 Mon Sep 17 00:00:00 2001
+From: Cristian Sovaiala <cristian.sovaiala@freescale.com>
+Date: Thu, 4 Jun 2015 18:27:20 +0300
+Subject: [PATCH 32/70] arm64: Add pdev_archdata for dmamask
+
+The dma_mask for a device structure is a pointer. This pointer
+needs to be set up before the dma mask can actually be set. Most
+frameworks in the kernel take care of setting this up properly but
+platform devices that don't follow a regular bus structure may not
+ever have this set. As a result, checks such as dma_capable will
+always return false on a raw platform device and dma_set_mask will
+always return -EIO. Fix this by adding a dma_mask in the
+platform_device archdata and setting it to be the dma_mask. Devices
+used in other frameworks can change this as needed.
+
+Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
+---
+ arch/arm64/include/asm/device.h |    1 +
+ arch/arm64/kernel/setup.c       |    7 +++++++
+ 2 files changed, 8 insertions(+)
+
+--- a/arch/arm64/include/asm/device.h
++++ b/arch/arm64/include/asm/device.h
+@@ -25,6 +25,7 @@ struct dev_archdata {
+ };
+ 
+ struct pdev_archdata {
++      u64 dma_mask;
+ };
+ 
+ #endif
+--- a/arch/arm64/kernel/setup.c
++++ b/arch/arm64/kernel/setup.c
+@@ -44,6 +44,7 @@
+ #include <linux/of_platform.h>
+ #include <linux/efi.h>
+ #include <linux/psci.h>
++#include <linux/dma-mapping.h>
+ 
+ #include <asm/acpi.h>
+ #include <asm/fixmap.h>
+@@ -381,3 +382,9 @@ static int __init topology_init(void)
+       return 0;
+ }
+ subsys_initcall(topology_init);
++
++void arch_setup_pdev_archdata(struct platform_device *pdev)
++{
++      pdev->archdata.dma_mask = DMA_BIT_MASK(32);
++      pdev->dev.dma_mask = &pdev->archdata.dma_mask;
++}