diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0392-Revert-dmaengine-bcm2835-Load-driver-early-and-suppo.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0392-Revert-dmaengine-bcm2835-Load-driver-early-and-suppo.patch | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0392-Revert-dmaengine-bcm2835-Load-driver-early-and-suppo.patch b/target/linux/brcm2708/patches-4.4/0392-Revert-dmaengine-bcm2835-Load-driver-early-and-suppo.patch new file mode 100644 index 0000000000..5ad5ffa41e --- /dev/null +++ b/target/linux/brcm2708/patches-4.4/0392-Revert-dmaengine-bcm2835-Load-driver-early-and-suppo.patch @@ -0,0 +1,90 @@ +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"); |