Patchwork [1/7] mtd: sh_flctl: Update FLCMNCR register bit field

login
register
mail settings
Submitter Bastian Hecht
Date Feb. 8, 2012, 12:16 p.m.
Message ID <1328703411-3452-1-git-send-email-hechtb@gmail.com>
Download mbox | patch
Permalink /patch/140127/
State New
Headers show

Comments

Bastian Hecht - Feb. 8, 2012, 12:16 p.m.
Updates the FLCMNCR bit field to match the newest hardware generation.
Some defines are added to select an appropriate clocking scheme.

Signed-off-by: Bastian Hecht <hechtb@gmail.com>
---
 include/linux/mtd/sh_flctl.h |   24 ++++++++++++++++++++++++
 1 files changed, 24 insertions(+), 0 deletions(-)

Patch

diff --git a/include/linux/mtd/sh_flctl.h b/include/linux/mtd/sh_flctl.h
index 9cf4c4c..ecbf3e6 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 registers 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_8_BIT_0_5HP			PULSE1
+#define CLK_8_BIT_1HP			0x0
+#define CLK_8_BIT_1_5HP			(PULSE1 | PULSE2)
+#define CLK_8_BIT_2HP			PULSE0
+#define CLK_8_BIT_3HP			(PULSE0 | PULSE1 | PULSE2)
+#define CLK_8_BIT_4HP			(PULSE0 | PULSE2)
+#define CLK_16_BIT_6HP_LOW_2HP_HIGH	PULSE0
+#define CLK_16_BIT_9HP_LOW_3HP_HIGH	(PULSE0 | PULSE1 | PULSE2)
+#define CLK_16_BIT_12HP_LOW_4HP_HIGH	(PULSE0 | PULSE2)
+
 /* FLCMDCR control bits */
 #define ADRCNT2_E	(0x1 << 31)	/* 5byte address enable */
 #define ADRMD_E		(0x1 << 26)	/* Sector address access */