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Commit d159d8b7 authored by Huang Shijie's avatar Huang Shijie Committed by Brian Norris
Browse files

mtd: gpmi: decouple the chip select from the DMA channel 



Decouple the chip select from the DMA channel, we use the DMA channel 0
to accecc all the nand devices.

Signed-off-by: default avatarHuang Shijie <b32955@freescale.com>
Signed-off-by: default avatarBrian Norris <computersforpeace@gmail.com>
parent 4af98749

drivers/mtd/nand/gpmi-nand/gpmi-lib.c

+6 −0
Original line number Diff line number Diff line
@@ -187,6 +187,12 @@ int gpmi_init(struct gpmi_nand_data *this) 
	/* Select BCH ECC. */

	writel(BM_GPMI_CTRL1_BCH_MODE, r->gpmi_regs + HW_GPMI_CTRL1_SET);



	/*

	 * Decouple the chip select from dma channel. We use dma0 for all

	 * the chips.

	 */

	writel(BM_GPMI_CTRL1_DECOUPLE_CS, r->gpmi_regs + HW_GPMI_CTRL1_SET);



	gpmi_disable_clk(this);

	return 0;

err_out:

drivers/mtd/nand/gpmi-nand/gpmi-regs.h

+3 −0
Original line number Diff line number Diff line
@@ -108,6 +108,9 @@ 
#define HW_GPMI_CTRL1_CLR				0x00000068

#define HW_GPMI_CTRL1_TOG				0x0000006c



#define BP_GPMI_CTRL1_DECOUPLE_CS			24

#define BM_GPMI_CTRL1_DECOUPLE_CS	(1 << BP_GPMI_CTRL1_DECOUPLE_CS)



#define BP_GPMI_CTRL1_WRN_DLY_SEL			22

#define BM_GPMI_CTRL1_WRN_DLY_SEL	(0x3 << BP_GPMI_CTRL1_WRN_DLY_SEL)

#define BF_GPMI_CTRL1_WRN_DLY_SEL(v)  \