In order for the DMA controller to work for SDRAM to devices transfers, the AHB clock should be reparented on the PLL6. Force that parenting in the clock driver. Signed-off-by: Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx> --- drivers/clk/sunxi/clk-sunxi.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c index cedaf4b..6cfcd23 100644 --- a/drivers/clk/sunxi/clk-sunxi.c +++ b/drivers/clk/sunxi/clk-sunxi.c @@ -1286,7 +1286,7 @@ static void __init of_sunxi_table_clock_setup(const struct of_device_id *clk_mat */ static void __init sunxi_clock_protect(void) { - struct clk *clk; + struct clk *clk, *parent; /* memory bus clock - sun5i+ */ clk = clk_get(NULL, "mbus"); @@ -1309,6 +1309,22 @@ static void __init sunxi_clock_protect(void) clk_put(clk); } + clk = clk_get(NULL, "ahb1_mux"); + if (IS_ERR(clk)) { + pr_err("Couldn't get AHB1 Mux\n"); + return; + } + + parent = clk_get(NULL, "pll6"); + if (IS_ERR(clk)) { + pr_err("Couldn't get PLL6\n"); + return; + } + + clk_set_parent(clk, parent); + + clk_put(clk); + clk_put(parent); } static void __init sunxi_init_clocks(void) -- 1.9.0 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html