openwrtv4/target/linux/brcm2708/patches-4.1/0101-bcm2835-sdhost-Clear-HBLC-for-PIO-mode.patch
Felix Fietkau 0b5d87fd30 brcm2708: update 4.1 patches
As usual, this patches were taken (and rebased) from
https://github.com/raspberrypi/linux/commits/rpi-4.1.y

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

SVN-Revision: 46853
2015-09-11 16:32:00 +00:00

34 lines
1.2 KiB
Diff

From c4b4cd3f5e0c6be67124fac4a7bbb5fb45de616c Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Wed, 1 Jul 2015 12:51:52 +0100
Subject: [PATCH 101/171] bcm2835-sdhost: Clear HBLC for PIO mode
Also update pio_limit default in overlay README.
---
arch/arm/boot/dts/overlays/README | 2 +-
drivers/mmc/host/bcm2835-sdhost.c | 3 +--
2 files changed, 2 insertions(+), 3 deletions(-)
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -441,7 +441,7 @@ Params: overclock_50 Clock (
force_pio Disable DMA support (default off)
pio_limit Number of blocks above which to use DMA
- (default 2)
+ (default 1)
debug Enable debug output (default off)
--- a/drivers/mmc/host/bcm2835-sdhost.c
+++ b/drivers/mmc/host/bcm2835-sdhost.c
@@ -699,8 +699,7 @@ static void bcm2835_sdhost_prepare_data(
bcm2835_sdhost_set_transfer_irqs(host);
bcm2835_sdhost_write(host, data->blksz, SDHBCT);
- if (host->use_dma)
- bcm2835_sdhost_write(host, data->blocks, SDHBLC);
+ bcm2835_sdhost_write(host, host->use_dma ? data->blocks : 0, SDHBLC);
BUG_ON(!host->data);
}