mirror of https://github.com/hak5/openwrt-owl.git
30 lines
1.0 KiB
Diff
30 lines
1.0 KiB
Diff
|
From b07600f50efe84d7e3b431e6d10fe774bb00d573 Mon Sep 17 00:00:00 2001
|
||
|
|
From: Stephen Warren <swarren@wwwdotorg.org>
|
||
|
|
Date: Tue, 21 May 2013 20:36:34 -0600
|
||
|
|
Subject: [PATCH 126/133] spi: introduce macros to set bits_per_word_mask
|
||
|
|
|
||
|
|
Introduce two macros to make setting up spi_master.bits_per_word_mask
|
||
|
|
easier, and avoid mistakes like writing BIT(n) instead of BIT(n - 1).
|
||
|
|
|
||
|
|
SPI_BPW_MASK is for a single supported value of bits_per_word_mask.
|
||
|
|
|
||
|
|
SPI_BPW_RANGE_MASK represents a contiguous set of bit lengths.
|
||
|
|
|
||
|
|
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
|
||
|
|
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
|
||
|
|
---
|
||
|
|
include/linux/spi/spi.h | 2 ++
|
||
|
|
1 file changed, 2 insertions(+)
|
||
|
|
|
||
|
|
--- a/include/linux/spi/spi.h
|
||
|
|
+++ b/include/linux/spi/spi.h
|
||
|
|
@@ -308,6 +308,8 @@ struct spi_master {
|
||
|
|
|
||
|
|
/* bitmask of supported bits_per_word for transfers */
|
||
|
|
u32 bits_per_word_mask;
|
||
|
|
+#define SPI_BPW_MASK(bits) BIT((bits) - 1)
|
||
|
|
+#define SPI_BPW_RANGE_MASK(min, max) ((BIT(max) - 1) - (BIT(min) - 1))
|
||
|
|
|
||
|
|
/* other constraints relevant to this driver */
|
||
|
|
u16 flags;
|