6.17-stable review patch. If anyone has any objections, please let me know.
------------------
From: Chen-Yu Tsai wens@kernel.org
[ Upstream commit 5888533c6011de319c5f23ae147f1f291ce81582 ]
The "bus-r-dma" clock in the A523's PRCM clock controller is also referred to as "DMA_CLKEN_SW" or "DMA ADB400 gating". It is unclear how this ties into the DMA controller MBUS clock gate; however if the clock is not enabled, the DMA controller in the MCU block will fail to access DRAM, even failing to retrieve the DMA descriptors.
Mark this clock as critical. This sort of mirrors what is done for the main DMA controller's MBUS clock, which has a separate toggle that is currently left out of the main clock controller driver.
Fixes: 8cea339cfb81 ("clk: sunxi-ng: add support for the A523/T527 PRCM CCU") Acked-by: Jernej Skrabec jernej.skrabec@gmail.com Link: https://patch.msgid.link/20251020171059.2786070-6-wens@kernel.org Signed-off-by: Chen-Yu Tsai wens@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/clk/sunxi-ng/ccu-sun55i-a523-r.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/clk/sunxi-ng/ccu-sun55i-a523-r.c b/drivers/clk/sunxi-ng/ccu-sun55i-a523-r.c index c5b0d4a2e397e..0339c4af0fe5b 100644 --- a/drivers/clk/sunxi-ng/ccu-sun55i-a523-r.c +++ b/drivers/clk/sunxi-ng/ccu-sun55i-a523-r.c @@ -121,7 +121,7 @@ static SUNXI_CCU_GATE_HW(bus_r_ir_rx_clk, "bus-r-ir-rx", &r_apb0_clk.common.hw, 0x1cc, BIT(0), 0);
static SUNXI_CCU_GATE_HW(bus_r_dma_clk, "bus-r-dma", - &r_apb0_clk.common.hw, 0x1dc, BIT(0), 0); + &r_apb0_clk.common.hw, 0x1dc, BIT(0), CLK_IS_CRITICAL); static SUNXI_CCU_GATE_HW(bus_r_rtc_clk, "bus-r-rtc", &r_apb0_clk.common.hw, 0x20c, BIT(0), 0); static SUNXI_CCU_GATE_HW(bus_r_cpucfg_clk, "bus-r-cpucfg",