mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-21 06:33:41 +00:00
52 lines
1.6 KiB
Diff
52 lines
1.6 KiB
Diff
|
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;
|
||
|
|
+}
|