From 24ae86bbe816da276f4fbf3ff9feae237f9ef319 Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Sat, 15 Aug 2015 11:59:25 +0200 Subject: [PATCH] sunxi_nand_spl: Turn off clocks when we're done with the nand Turn off the nand and dma clocks when we're done with the nand, this puts the nand and dma controllers back into a clean state for when the kernel boots. Without this the kernel will not boot properly when it is built with dma-controller support. Signed-off-by: Hans de Goede Acked-by: Ian Campbell --- drivers/mtd/nand/sunxi_nand_spl.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) diff --git a/drivers/mtd/nand/sunxi_nand_spl.c b/drivers/mtd/nand/sunxi_nand_spl.c index 9efe904cc7..147d47638f 100644 --- a/drivers/mtd/nand/sunxi_nand_spl.c +++ b/drivers/mtd/nand/sunxi_nand_spl.c @@ -5,9 +5,10 @@ * SPDX-License-Identifier: GPL-2.0+ */ +#include +#include #include #include -#include #include /* registers */ @@ -330,4 +331,16 @@ int nand_spl_load_image(uint32_t offs, unsigned int size, void *dest) return ecc_errors ? -1 : 0; } -void nand_deselect(void) {} +void nand_deselect(void) +{ + struct sunxi_ccm_reg *const ccm = + (struct sunxi_ccm_reg *)SUNXI_CCM_BASE; + + clrbits_le32(&ccm->ahb_gate0, (CLK_GATE_OPEN << AHB_GATE_OFFSET_NAND0)); +#ifdef CONFIG_MACH_SUN9I + clrbits_le32(&ccm->ahb_gate1, (1 << AHB_GATE_OFFSET_DMA)); +#else + clrbits_le32(&ccm->ahb_gate0, (1 << AHB_GATE_OFFSET_DMA)); +#endif + clrbits_le32(&ccm->nand0_clk_cfg, CCM_NAND_CTRL_ENABLE | AHB_DIV_1); +} -- 2.39.2