You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
90 lines
2.6 KiB
90 lines
2.6 KiB
From 7550c11bac6c1990f2e4a583c99e211cb402782b Mon Sep 17 00:00:00 2001
|
|
From: Martin Sperl <kernel@martin.sperl.org>
|
|
Date: Fri, 22 Apr 2016 17:17:30 +0000
|
|
Subject: [PATCH 392/423] Revert "dmaengine: bcm2835: Load driver early and
|
|
support legacy API"
|
|
|
|
This reverts commit 6f56fff39c811953809b011f59c49a2122c4d173.
|
|
---
|
|
drivers/dma/Kconfig | 2 +-
|
|
drivers/dma/bcm2835-dma.c | 30 ++++++------------------------
|
|
2 files changed, 7 insertions(+), 25 deletions(-)
|
|
|
|
--- a/drivers/dma/Kconfig
|
|
+++ b/drivers/dma/Kconfig
|
|
@@ -108,7 +108,7 @@ config COH901318
|
|
|
|
config DMA_BCM2835
|
|
tristate "BCM2835 DMA engine support"
|
|
- depends on ARCH_BCM2835 || ARCH_BCM2708 || ARCH_BCM2709
|
|
+ depends on ARCH_BCM2835
|
|
select DMA_ENGINE
|
|
select DMA_VIRTUAL_CHANNELS
|
|
|
|
--- a/drivers/dma/bcm2835-dma.c
|
|
+++ b/drivers/dma/bcm2835-dma.c
|
|
@@ -36,7 +36,6 @@
|
|
#include <linux/interrupt.h>
|
|
#include <linux/list.h>
|
|
#include <linux/module.h>
|
|
-#include <linux/platform_data/dma-bcm2708.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/io.h>
|
|
@@ -787,10 +786,6 @@ static int bcm2835_dma_probe(struct plat
|
|
if (IS_ERR(base))
|
|
return PTR_ERR(base);
|
|
|
|
- rc = bcm_dmaman_probe(pdev, base, BCM2835_DMA_BULK_MASK);
|
|
- if (rc)
|
|
- dev_err(&pdev->dev, "Failed to initialize the legacy API\n");
|
|
-
|
|
od->base = base;
|
|
|
|
dma_cap_set(DMA_SLAVE, od->ddev.cap_mask);
|
|
@@ -823,8 +818,11 @@ static int bcm2835_dma_probe(struct plat
|
|
goto err_no_dma;
|
|
}
|
|
|
|
- /* Channel 0 is used by the legacy API */
|
|
- chans_available &= ~BCM2835_DMA_BULK_MASK;
|
|
+ /*
|
|
+ * Do not use the FIQ and BULK channels,
|
|
+ * because they are used by the GPU.
|
|
+ */
|
|
+ chans_available &= ~(BCM2835_DMA_FIQ_MASK | BCM2835_DMA_BULK_MASK);
|
|
|
|
for (i = 0; i < pdev->num_resources; i++) {
|
|
irq = platform_get_irq(pdev, i);
|
|
@@ -868,7 +866,6 @@ static int bcm2835_dma_remove(struct pla
|
|
{
|
|
struct bcm2835_dmadev *od = platform_get_drvdata(pdev);
|
|
|
|
- bcm_dmaman_remove(pdev);
|
|
dma_async_device_unregister(&od->ddev);
|
|
bcm2835_dma_free(od);
|
|
|
|
@@ -884,22 +881,7 @@ static struct platform_driver bcm2835_dm
|
|
},
|
|
};
|
|
|
|
-static int bcm2835_dma_init(void)
|
|
-{
|
|
- return platform_driver_register(&bcm2835_dma_driver);
|
|
-}
|
|
-
|
|
-static void bcm2835_dma_exit(void)
|
|
-{
|
|
- platform_driver_unregister(&bcm2835_dma_driver);
|
|
-}
|
|
-
|
|
-/*
|
|
- * Load after serial driver (arch_initcall) so we see the messages if it fails,
|
|
- * but before drivers (module_init) that need a DMA channel.
|
|
- */
|
|
-subsys_initcall(bcm2835_dma_init);
|
|
-module_exit(bcm2835_dma_exit);
|
|
+module_platform_driver(bcm2835_dma_driver);
|
|
|
|
MODULE_ALIAS("platform:bcm2835-dma");
|
|
MODULE_DESCRIPTION("BCM2835 DMA engine driver");
|
|
|