linux-toradex.git/drivers/mfd/ucb1x00-core.c, branch v3.4.70 Linux kernel for Apalis and Colibri modules MFD: ucb1x00-core: add wakeup support 2012-02-18T23:15:43+00:00 Russell King rmk+kernel@arm.linux.org.uk 2012-01-22T20:05:24+00:00 33237616771bfc29a97f17e74efe3799bb790343 Add genirq wakeup support for the ucb1x00 device. This allows an attached gpio_keys driver to wakeup the system. Touchscreen is also possible. When there are no wakeup sources, ask the platform to assert the reset signal to avoid any unexpected behaviour; this also puts the reset signal at the right level when power is removed from the device. Acked-by: Jochen Friedrich <jochen@scram.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Add genirq wakeup support for the ucb1x00 device.  This allows an
attached gpio_keys driver to wakeup the system.  Touchscreen is also
possible.

When there are no wakeup sources, ask the platform to assert the reset
signal to avoid any unexpected behaviour; this also puts the reset
signal at the right level when power is removed from the device.

Acked-by: Jochen Friedrich <jochen@scram.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
MFD: ucb1x00: convert to use genirq 2012-02-18T23:15:43+00:00 Russell King rmk+kernel@arm.linux.org.uk 2012-01-21T14:58:28+00:00 a3364409c4af8bae42d04def48dc11409787e503 Convert the ucb1x00 driver to use genirq's interrupt services, rather than its own private implementation. This allows a wider range of drivers to use the GPIO interrupts (such as the gpio_keys driver) without being aware of the UCB1x00's private IRQ system. This prevents the UCB1x00 core driver from being built as a module, so adjust the configuration to add that restriction. Acked-by: Jochen Friedrich <jochen@scram.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Convert the ucb1x00 driver to use genirq's interrupt services, rather
than its own private implementation.  This allows a wider range of
drivers to use the GPIO interrupts (such as the gpio_keys driver)
without being aware of the UCB1x00's private IRQ system.

This prevents the UCB1x00 core driver from being built as a module,
so adjust the configuration to add that restriction.

Acked-by: Jochen Friedrich <jochen@scram.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
MFD: ucb1x00-core: convert to use dev_pm_ops 2012-02-18T23:15:42+00:00 Russell King rmk+kernel@arm.linux.org.uk 2012-01-21T16:36:30+00:00 5a09b7120a965a7d7e8494d0ed509135bbce0118 Convert the ucb1x00-core driver to use dev_pm_ops rather than the legacy members in the mcp driver. Acked-by: Jochen Friedrich <jochen@scram.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Convert the ucb1x00-core driver to use dev_pm_ops rather than the legacy
members in the mcp driver.

Acked-by: Jochen Friedrich <jochen@scram.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
MFD: ucb1x00-core: disable mcp clock when bus is not required 2012-02-18T23:15:41+00:00 Russell King rmk+kernel@arm.linux.org.uk 2012-01-21T18:24:17+00:00 2b4d9d2b001be2ff06be2ea5c52e9adaf85b0805 The ucb1x00-core was leaving the mcp clock enabled indefinitely after probe. This needlessly wastes power. Add the necessary disables to ensure that the clock remains off when we don't need it. Acked-by: Jochen Friedrich <jochen@scram.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
The ucb1x00-core was leaving the mcp clock enabled indefinitely after
probe.  This needlessly wastes power.  Add the necessary disables to
ensure that the clock remains off when we don't need it.

Acked-by: Jochen Friedrich <jochen@scram.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
MFD: ucb1x00-core: add missing ucb1x00_enable()/ucb1x00_disable() 2012-02-18T23:15:38+00:00 Russell King rmk+kernel@arm.linux.org.uk 2012-01-21T18:13:20+00:00 ed442b6798eb39eda3bcea92ef9403280b603818 ucb1x00_enable() and ucb1x00_disable() are used for power saving on the SIB interface, allowing the host supplied clock to be disabled when not required. We require drivers which access the ucb1x00 to ensure that they have enabled the clock prior to accessing the device, and they should disable it once they're done. As we don't expect gpiolib users to be aware of this detail, we must make these calls in the gpiolib interfaces. Add them. Also add them to the resume method, which needs to re-establish the GPIO pin settings. Acked-by: Jochen Friedrich <jochen@scram.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
ucb1x00_enable() and ucb1x00_disable() are used for power saving on the
SIB interface, allowing the host supplied clock to be disabled when not
required.  We require drivers which access the ucb1x00 to ensure that
they have enabled the clock prior to accessing the device, and they
should disable it once they're done.

As we don't expect gpiolib users to be aware of this detail, we must
make these calls in the gpiolib interfaces.  Add them.

Also add them to the resume method, which needs to re-establish the
GPIO pin settings.

Acked-by: Jochen Friedrich <jochen@scram.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
MFD: ucb1x00-core: scan drivers in same order they're registered 2012-02-18T23:15:35+00:00 Russell King rmk+kernel@arm.linux.org.uk 2012-01-21T15:35:01+00:00 65b539bb900f64b9a3f9b761bf0f735dc84e6b70 Cosmetic patch to scan the list of drivers in the order that the drivers are registered, rather than the reverse order. This avoids surprises when drivers get probed in the reverse order, and input devices get registered in a different order due to bind/unbind than from boot. Acked-by: Jochen Friedrich <jochen@scram.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Cosmetic patch to scan the list of drivers in the order that the drivers
are registered, rather than the reverse order.  This avoids surprises
when drivers get probed in the reverse order, and input devices get
registered in a different order due to bind/unbind than from boot.

Acked-by: Jochen Friedrich <jochen@scram.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
MFD: ucb1x00-core: add owner and dev initializers to gpio structure 2012-02-18T23:15:33+00:00 Russell King rmk+kernel@arm.linux.org.uk 2012-01-21T14:47:00+00:00 7655b2ac9ed3206fb916357b8b1065f08324507d Register the gpio device with proper .owner and .dev elements set appropraitely. Acked-by: Jochen Friedrich <jochen@scram.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Register the gpio device with proper .owner and .dev elements set
appropraitely.

Acked-by: Jochen Friedrich <jochen@scram.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
MFD: ucb1x00-core: clean up device handling in probe 2012-02-18T23:15:33+00:00 Russell King rmk+kernel@arm.linux.org.uk 2012-01-21T14:45:17+00:00 f5ae587f5d258bda9c24bb8387315eb2ebedeee9 Clean up the device handling so we can use the struct device sanely. Acked-by: Jochen Friedrich <jochen@scram.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Clean up the device handling so we can use the struct device sanely.

Acked-by: Jochen Friedrich <jochen@scram.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
MFD: ucb1x00-core: use mutexes instead of semaphores 2012-02-18T23:15:32+00:00 Russell King rmk+kernel@arm.linux.org.uk 2012-01-21T09:33:38+00:00 cae154767a96563d33924872aacfdc63d584f707 Convert the ucb1x00 driver to use mutexes rather than the depreciated semaphores for exclusive access to the ADC. Acked-by: Jochen Friedrich <jochen@scram.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Convert the ucb1x00 driver to use mutexes rather than the depreciated
semaphores for exclusive access to the ADC.

Acked-by: Jochen Friedrich <jochen@scram.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
MFD: ucb1x00-core: add .owner initializer and module alias 2012-02-18T23:15:32+00:00 Russell King rmk+kernel@arm.linux.org.uk 2012-01-21T16:33:38+00:00 ddb1e04a35846b6c5b6039e92555dafaf6ee03d2 Add a .owner initializer to the UCB1x00 mcp driver structure, and set an appropriate module alias to identify this driver. Acked-by: Jochen Friedrich <jochen@scram.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Add a .owner initializer to the UCB1x00 mcp driver structure, and
set an appropriate module alias to identify this driver.

Acked-by: Jochen Friedrich <jochen@scram.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>