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authorMike Frysinger <vapier@gentoo.org>2010-10-22 09:11:21 +0400
committerMike Frysinger <vapier@gentoo.org>2010-10-25 12:54:32 +0400
commit61c16b5c7414b6d0511dc384e0ea994e250e6339 (patch)
tree6d3c198f42c931f4ecf7d3b0b5c668d582a1b794 /arch/blackfin
parent02460d08930656b3a50381cfb119864efcd4eef9 (diff)
downloadlinux-61c16b5c7414b6d0511dc384e0ea994e250e6339.tar.xz
Blackfin: bfin_twi.h: start a common TWI header
Start one place for TWI definitions. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'arch/blackfin')
-rw-r--r--arch/blackfin/include/asm/bfin_twi.h43
1 files changed, 43 insertions, 0 deletions
diff --git a/arch/blackfin/include/asm/bfin_twi.h b/arch/blackfin/include/asm/bfin_twi.h
new file mode 100644
index 000000000000..cc155e14e55c
--- /dev/null
+++ b/arch/blackfin/include/asm/bfin_twi.h
@@ -0,0 +1,43 @@
+/*
+ * bfin_twi.h - interface to Blackfin TWIs
+ *
+ * Copyright 2005-2010 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef __ASM_BFIN_TWI_H__
+#define __ASM_BFIN_TWI_H__
+
+#include <linux/types.h>
+
+/*
+ * All Blackfin system MMRs are padded to 32bits even if the register
+ * itself is only 16bits. So use a helper macro to streamline this.
+ */
+#define __BFP(m) u16 m; u16 __pad_##m
+
+/*
+ * bfin twi registers layout
+ */
+struct bfin_twi_regs {
+ __BFP(clkdiv);
+ __BFP(control);
+ __BFP(slave_ctl);
+ __BFP(slave_stat);
+ __BFP(slave_addr);
+ __BFP(master_ctl);
+ __BFP(master_stat);
+ __BFP(master_addr);
+ __BFP(int_stat);
+ __BFP(int_mask);
+ __BFP(fifo_ctl);
+ __BFP(fifo_stat);
+ u32 __pad[20];
+ __BFP(xmt_data8);
+ __BFP(xmt_data16);
+ __BFP(rcv_data8);
+ __BFP(rcv_data16);
+};
+
+#endif