linux-toradex.git/drivers/pwm, branch v3.6

pwm: pwm-tiehrpwm: Fix conflicting channel period setting

2012-09-10T15:04:38+00:00

EHRPWM hardware supports 2 independent PWM channels. However the device
uses only one register to handle period setting for both channels. So
both channels should be configured for same period (in nsec).

Fix the same by returning error for conflicting period values.

However, allow
1. Configuration of period settings if not conflicting with other
channels
2. Re-configuring of period settings if no other channels being
configured

Signed-off-by: Philip, Avinash 
Signed-off-by: Thierry Reding

pwm: pwm-tiecap: Disable APWM mode after configure

2012-09-10T15:03:13+00:00

APWM mode is enabled while configuring PWM device. This was done to
handle shadow & immediate mode update of period and compare registers.
However, leaving it enabled after configuring will cause APWM output on
PWM pin even before enabling PWM device.
Fix the same by disabling APWM mode after configuring if PWM device is
not running.

Signed-off-by: Philip, Avinash 
Signed-off-by: Thierry Reding

pwm: Improve Kconfig help text

2012-08-20T09:58:43+00:00

The Kconfig help text should help the user understand what functionality
is provided by an option. This is especially true for new subsystems. An
improved help text is provided by this commit in the hopes of clarifying
the usefulness of the PWM framework.

Signed-off-by: Thierry Reding 
Acked-by: Borislav Petkov

pwm: core: Fix coding style issues

2012-08-17T12:08:26+00:00

Fixes the following:
WARNING: line over 80 characters
ERROR: spaces required around that ':' (ctx:VxW)
WARNING: Prefer pr_warn(... to pr_warning(...

Signed-off-by: Sachin Kamat 
Signed-off-by: Thierry Reding

pwm: vt8500: Fix coding style issue

2012-08-17T12:08:25+00:00

Fixes the following:
WARNING: Prefer pr_warn(... to pr_warning(...
	pr_warning("Waiting for status bits 0x%x to clear timed out\n",

Signed-off-by: Sachin Kamat 
Signed-off-by: Thierry Reding

pwm: Remove a redundant error message when devm_request_and_ioremap fails

2012-08-17T12:08:25+00:00

The implementation in devm_request_and_ioremap() already shows error message,
so no need to show dev_err again if devm_request_and_ioremap() fails.

Signed-off-by: Axel Lin 
Cc: Stephen Warren 
Cc: Philip, Avinash 
Signed-off-by: Thierry Reding

pwm: samsung: add missing device pointer to struct pwm_chip

2012-08-17T12:08:24+00:00

This patch adds missing device pointer to struct pwm_chip. If the
device pointer is NULL, pwmchip_add() will return error.

Signed-off-by: Jingoo Han 
Signed-off-by: Thierry Reding

pwm: Add missing static storage class specifiers in core.c file

2012-08-17T12:08:24+00:00

Fixes the following sparse warnings:
drivers/pwm/core.c:152:6: warning:
symbol 'of_pwmchip_add' was not declared. Should it be static?
drivers/pwm/core.c:165:6: warning:
symbol 'of_pwmchip_remove' was not declared. Should it be static?

Signed-off-by: Sachin Kamat 
Signed-off-by: Thierry Reding

pwm: pwm-tiehrpwm: PWM driver support for EHRPWM

2012-07-26T05:45:20+00:00

Enhanced high resolution PWM module (EHRPWM) hardware can be used to
generate PWM output over 2 channels. This commit adds PWM driver support
for EHRPWM device present on AM33XX SOC. Current implementation supports
simple PWM functionality.

Reviewed-by: Vaibhav Bedia 
Signed-off-by: Philip, Avinash 
Signed-off-by: Thierry Reding

pwm: pwm-tiecap: PWM driver support for ECAP APWM

2012-07-26T05:44:52+00:00

ECAP hardware on AM33XX SOC supports auxiliary PWM (APWM) feature. This
commit adds PWM driver support for ECAP hardware on AM33XX SOC.

In the ECAP hardware, each PWM pin can also be configured to be in
capture mode. Current implementation only supports PWM mode of
operation. Also, hardware supports sync between multiple PWM pins but
the driver supports simple independent PWM functionality.

Reviewed-by: Vaibhav Bedia 
Signed-off-by: Philip, Avinash 
Signed-off-by: Thierry Reding