A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-30 03:27:44 -04:00
Code Issues Projects Releases Packages Wiki Activity

dmaengine/amba-pl08x: Simplify pl08x_ensure_on()

Browse source 
Simply writing 1 on bit 0 is sufficient instead of reading and clearing bits.
Also as per manual, for bit 3-31 of DMACConfiguration register:
"read undefined, write as 0"

So, we must not rely on values read from this registers bit 3-31.

Signed-off-by: Viresh Kumar <[email protected]>
Acked-by: Linus Walleij <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
This commit is contained in:
Viresh Kumar 2011-08-05 15:32:34 +05:30 • committed by Vinod Koul
commit 48a59ef357
1 changed files with 1 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

8
drivers/dma/amba-pl08x.c
View file

@ -1502,13 +1502,7 @@ bool pl08x_filter_id(struct dma_chan *chan, void *chan_id)
*/
static void pl08x_ensure_on(struct pl08x_driver_data *pl08x)
{
u32 val;
val = readl(pl08x->base + PL080_CONFIG);
val &= ~(PL080_CONFIG_M2_BE | PL080_CONFIG_M1_BE | PL080_CONFIG_ENABLE);
/* We implicitly clear bit 1 and that means little-endian mode */
val |= PL080_CONFIG_ENABLE;
writel(val, pl08x->base + PL080_CONFIG);
writel(PL080_CONFIG_ENABLE, pl08x->base + PL080_CONFIG);
}
static void pl08x_unmap_buffers(struct pl08x_txd *txd)