From f10a5407b58603fb3b084d7fbdbd50f47d010c82 Mon Sep 17 00:00:00 2001
From: Samu Onkalo <samu.p.onkalo@nokia.com>
Date: Fri, 22 Oct 2010 07:57:31 -0400
Subject: hwmon: lis3: use block read to access data registers

Add optional blockread function to interface driver. If available
the chip driver uses it for data register access. For 12 bit device
it reads 6 bytes to get 3*16bit data. For 8 bit device it reads out
5 bytes since every second byte is dummy.
This optimizes bus usage and reduces number of operations and
interrupts needed for one data update.

Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Acked-by: Eric Piel <eric.piel@tremplin-utc.net>
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
---
 include/linux/lis3lv02d.h | 1 +
 1 file changed, 1 insertion(+)

(limited to 'include/linux/lis3lv02d.h')

diff --git a/include/linux/lis3lv02d.h b/include/linux/lis3lv02d.h
index 18d578f08120..c949612ac841 100644
--- a/include/linux/lis3lv02d.h
+++ b/include/linux/lis3lv02d.h
@@ -68,6 +68,7 @@ struct lis3lv02d_platform_data {
 	s8 axis_y;
 	s8 axis_z;
 #define LIS3_USE_REGULATOR_CTRL 0x01
+#define LIS3_USE_BLOCK_READ	0x02
 	u16 driver_features;
 	int default_rate;
 	int (*setup_resources)(void);
-- 
cgit