AHB BIST gate is actually controlled with bit 7.
This bug was detected while trying to use the NAND controller which is
using the DMA engine to transfer data to the NAND.
Since the ahb_bist_clk gate bit conflicts with the ahb_dma_clk gate bit,
the core was disabling the DMA engine clock as part of its 'disable
unused clks' procedure, which was causing all DMA transfers to fail after
this point.
Fixes: 5e73761786d6 ("clk: sunxi-ng: Add sun5i CCU driver")
Cc: stable@xxxxxxxxxxxxxxx
Reported-by: Angus Ainslie <angus@xxxxxxxx>
Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxxxxxxx>
---
drivers/clk/sunxi-ng/ccu-sun5i.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/clk/sunxi-ng/ccu-sun5i.c b/drivers/clk/sunxi-ng/ccu-sun5i.c
index 5c476f966a72..5372bf8be5e6 100644
--- a/drivers/clk/sunxi-ng/ccu-sun5i.c
+++ b/drivers/clk/sunxi-ng/ccu-sun5i.c
@@ -243,7 +243,7 @@ static SUNXI_CCU_GATE(ahb_ss_clk, "ahb-ss", "ahb",
static SUNXI_CCU_GATE(ahb_dma_clk, "ahb-dma", "ahb",
0x060, BIT(6), 0);
static SUNXI_CCU_GATE(ahb_bist_clk, "ahb-bist", "ahb",
- 0x060, BIT(6), 0);
+ 0x060, BIT(7), 0);
static SUNXI_CCU_GATE(ahb_mmc0_clk, "ahb-mmc0", "ahb",
0x060, BIT(8), 0);
static SUNXI_CCU_GATE(ahb_mmc1_clk, "ahb-mmc1", "ahb",
--
2.7.4