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* hwmon: (lis3lv02d_i2c) Fix compile warningsGuenter Roeck2010-11-221-6/+4
| | | | | | | | | | | | | | | | | | | This commit fixes the following compile warnings. From v2.6.37-rc2/m68k/m68k-allmodconfig, v2.6.37-rc2/powerpc/powerpc-randconfig: drivers/hwmon/lis3lv02d_i2c.c:222: warning: 'lis3_i2c_runtime_suspend' defined but not used drivers/hwmon/lis3lv02d_i2c.c:231: warning: 'lis3_i2c_runtime_resume' defined but not used Seen if CONFIG_PM_RUNTIME is not set. From v2.6.37-rc2/sh4/sh-allyesconfig: drivers/hwmon/lis3lv02d_i2c.c:191: warning: 'lis3lv02d_i2c_suspend' defined but not used drivers/hwmon/lis3lv02d_i2c.c:201: warning: 'lis3lv02d_i2c_resume' defined but not used Seen if CONFIG_PM is set but CONFIG_PM_SLEEP is not. Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com> Acked-by: Jean Delvare <khali@linux-fr.org>
* hwmon: lis3: Release resources in case of failureSamu Onkalo2010-10-251-0/+5
| | | | | | | | | If lis3lv02d_init_device fails, HW resources were not released properly. In case of failure call release_resources if available. Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com> Acked-by: Eric Piel <eric.piel@tremplin-utc.net> Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
* hwmon: lis3: use block read to access data registersSamu Onkalo2010-10-251-0/+13
| | | | | | | | | | | | | | 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>
* hwmon: lis3: restore axis enabled bitsSamu Onkalo2010-10-251-1/+1
| | | | | | | | | All axis enable bits are set to 0 at module remove. Restore reset default value at init. Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com> Acked-by: Eric Piel <eric.piel@tremplin-utc.net> Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
* hwmon: lis3: regulator controlSamu Onkalo2010-10-251-1/+54
| | | | | | | | | | | | Based on pm_runtime control, turn lis3 regulators on and off. Perform context save and restore on transitions. Feature is optional and must be enabled in platform data. 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>
* hwmon: lis3: pm_runtime supportSamu Onkalo2010-10-251-13/+41
| | | | | | | | | | | | | | | | Add pm_runtime support to lis3 core driver. Add pm_runtime support to lis3 i2c driver. spi and hp_accel drivers are not yet supported. Old always on functionality remains for those. For sysfs there is 5 second delay before turning off the chip to avoid long ramp up delay. 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>
* hwmon: (lis3) add axes module parameter for custom axis-mappingTakashi Iwai2010-10-251-3/+2
| | | | | | | | | | | | | | | | | | The axis-mapping of lis3dev device on many (rather most) HP machines doesn't follow the standard. When each new model appears, users need to adjust again. Testing this requires the rebuild of kernel, thus it's not trivial for end-users. This patch adds a module parameter "axes" to allow a custom axis-mapping without patching and recompiling the kernel driver. User can pass the parameter such as axes=3,2,1. Also it can be changed via sysfs. Signed-off-by: Takashi Iwai <tiwai@suse.de> Acked-by: Eric Piel <eric.piel@tremplin-utc.net> Cc: Jean Delvare <khali@linux-fr.org> Cc: Guenter Roeck <guenter.roeck@ericsson.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
* hwmon: (lis3lv02d) Prevent NULL pointer dereferenceKuninori Morimoto2010-09-171-2/+2
| | | | | | | | | | If CONFIG_PM was selected and lis3lv02d_platform_data was NULL, the kernel will be panic when halt command run. Reported-by: Yusuke Goda <yusuke.goda.sx@renesas.com> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Acked-by: Samu Onkalo <samu.p.onkalo@nokia.com> Sigend-off-by: Jean Delvare <khali@linux-fr.org>
* hwmon: I2C bus support for lis3lv02d and variant accelerometer chipsSamu Onkalo2009-12-171-0/+183
Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com> Cc: Éric Piel <eric.piel@tremplin-utc.net> Cc: Kalhan Trisal <kalhan.trisal@intel.com> Cc: Jean Delvare <khali@linux-fr.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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