From b6a5588b27f21d74ae35709b56e969d536f1eed0 Mon Sep 17 00:00:00 2001 From: Bastian Hecht Date: Thu, 1 Mar 2012 10:48:35 +0100 Subject: [PATCH] mtd: sh_flctl: Expand FLCMNCR register bit field Add support for a new hardware generation. The meaning of some bits of the FLCMNCR register changed, so some new defines are added parallel to the existing ones to keep backward compatibility. The defines allow to choose an appropriate clocking scheme. Signed-off-by: Bastian Hecht Acked-by: Laurent Pinchart Signed-off-by: Artem Bityutskiy Signed-off-by: David Woodhouse --- include/linux/mtd/sh_flctl.h | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/include/linux/mtd/sh_flctl.h b/include/linux/mtd/sh_flctl.h index 9cf4c4c79555..b66940593c82 100644 --- a/include/linux/mtd/sh_flctl.h +++ b/include/linux/mtd/sh_flctl.h @@ -67,6 +67,30 @@ #define CE0_ENABLE (0x1 << 3) /* Chip Enable 0 */ #define TYPESEL_SET (0x1 << 0) +/* + * Clock settings using the PULSEx registers from FLCMNCR + * + * Some hardware uses bits called PULSEx instead of FCKSEL_E and QTSEL_E + * to control the clock divider used between the High-Speed Peripheral Clock + * and the FLCTL internal clock. If so, use CLK_8_BIT_xxx for connecting 8 bit + * and CLK_16_BIT_xxx for connecting 16 bit bus bandwith NAND chips. For the 16 + * bit version the divider is seperate for the pulse width of high and low + * signals. + */ +#define PULSE3 (0x1 << 27) +#define PULSE2 (0x1 << 17) +#define PULSE1 (0x1 << 15) +#define PULSE0 (0x1 << 9) +#define CLK_8B_0_5 PULSE1 +#define CLK_8B_1 0x0 +#define CLK_8B_1_5 (PULSE1 | PULSE2) +#define CLK_8B_2 PULSE0 +#define CLK_8B_3 (PULSE0 | PULSE1 | PULSE2) +#define CLK_8B_4 (PULSE0 | PULSE2) +#define CLK_16B_6L_2H PULSE0 +#define CLK_16B_9L_3H (PULSE0 | PULSE1 | PULSE2) +#define CLK_16B_12L_4H (PULSE0 | PULSE2) + /* FLCMDCR control bits */ #define ADRCNT2_E (0x1 << 31) /* 5byte address enable */ #define ADRMD_E (0x1 << 26) /* Sector address access */ -- 2.30.2