talos-obmc-linux/include/linux, branch dev-4.10

gpio: gpiolib: Generalise state persistence beyond sleep

2018-01-16T17:54:29+00:00

General support for state persistence is added to gpiolib with the introduction of a new pinconf parameter to propagate the request to hardware. The existing persistence support for sleep is adapted to include hardware support if the GPIO driver provides it. Persistence continues to be enabled by default; in-kernel consumers can opt out, but userspace (currently) does not have a choice. The *_SLEEP_MAY_LOSE_VALUE and *_SLEEP_MAINTAIN_VALUE symbols are renamed, dropping the SLEEP prefix to reflect that the concept is no longer sleep-specific. I feel that renaming to just *_MAY_LOSE_VALUE could initially be misinterpreted, so I've further changed the symbols to *_TRANSITORY and *_PERSISTENT to address this. The sysfs interface is modified only to keep consistency with the chardev interface in enforcing persistence for userspace exports. Signed-off-by: Andrew Jeffery Reviewed-by: Charles Keepax Acked-by: Rob Herring Signed-off-by: Linus Walleij (cherry picked from commit e10f72bf4b3e8885c1915a119141481e7fc45ca8) Signed-off-by: Joel Stanley

gpio: core: Decouple open drain/source flag with active low/high

2018-01-16T17:54:29+00:00

Currently, the GPIO interface is said to Open Drain if it is Single Ended and active LOW. Similarly, it is said as Open Source if it is Single Ended and active HIGH. The active HIGH/LOW is used in the interface for setting the pin state to HIGH or LOW when enabling/disabling the interface. In Open Drain interface, pin is set to HIGH by putting pin in high impedance and LOW by driving to the LOW. In Open Source interface, pin is set to HIGH by driving pin to HIGH and set to LOW by putting pin in high impedance. With above, the Open Drain/Source is unrelated to the active LOW/HIGH in interface. There is interface where the enable/disable of interface is ether active LOW or HIGH but it is Open Drain type. Hence decouple the Open Drain with Single Ended + Active LOW and Open Source with Single Ended + Active HIGH. Adding different flag for the Open Drain/Open Source which is valid only when Single ended flag is enabled. Signed-off-by: Laxman Dewangan Signed-off-by: Linus Walleij (cherry picked from commit 4c0facddb7d88c78c8bd977c16faa647f079ccda) Signed-off-by: Andrew Jeffery Signed-off-by: Joel Stanley

gpiolib: Convert fwnode_get_named_gpiod() to configure GPIO

2018-01-16T17:54:28+00:00

Make fwnode_get_named_gpiod() consistent with the rest of gpiod_get() like API, i.e. configure GPIO pin immediately after request. Besides obvious clean up it will help to configure pins based on firmware provided resources. Reviewed-by: Mika Westerberg Signed-off-by: Andy Shevchenko Signed-off-by: Linus Walleij (cherry picked from commit a264d10ff45c688293d9112fddd8d29c819e0853) Signed-off-by: Andrew Jeffery Signed-off-by: Joel Stanley

fsi: occ: Add OCC response definitions to header

2017-10-09T01:48:44+00:00

Also fix include guards. OpenBMC-Staging-Count: 1 Signed-off-by: Edward A. James Acked-by: Andrew Jeffery Signed-off-by: Joel Stanley

fsi: sbefifo: Fix include guards in header file

2017-10-09T01:47:47+00:00

Make them conform to Linux standard headers. OpenBMC-Staging-Count: 1 Signed-off-by: Edward A. James Reviewed-by: Andrew Jeffery Signed-off-by: Joel Stanley

leds: gpio: Allow LED to retain state at shutdown

2017-08-29T00:48:36+00:00

In some systems, such as Baseboard Management Controllers (BMCs), we want to retain the state of LEDs across a reboot of the BMC (whilst the host remains up). Implement support for the retain-state-shutdown devicetree property in leds-gpio. Signed-off-by: Andrew Jeffery Acked-by: Pavel Machek Signed-off-by: Jacek Anaszewski (cherry picked from commit ab9fa30883635b7a579ed318ac7ec7d85fe1e4d5) Signed-off-by: Andrew Jeffery

serial: 8250: Add flag so drivers can avoid THRE probe

2017-07-31T09:28:35+00:00

The probing of THRE irq behaviour assumes the other end will be reading bytes out of the buffer in order to probe the port at driver init. In some cases the other end cannot be relied upon to read these bytes, so provide a flag for them to skip this step. Bit 19 was chosen as the flags are a int and the top bits are taken. Acked-by: Benjamin Herrenschmidt Signed-off-by: Joel Stanley Signed-off-by: Greg Kroah-Hartman (cherry picked from commit ea5244e2af3b4813bf3d90ba6a6481d1a3c33d15) Signed-off-by: Joel Stanley

tty: don't force !TTYB_NORMAL flip buffers if not required

2017-07-27T07:01:33+00:00

In change acc0f67f30, we introduced flip buffers that skipped allocation of the flags buffer for characters received with TTY_NORMAL flags. However, the slow path of tty_insert_flip_char() calls tty_insert_flip_string_flags() (providing a flag buffer pointer), which forces the buffer code to allocate a !TTYB_NORMAL buffer. If we took the slow path due to running out of buffer space, rather than seeing !TTY_NORMAL flags, we've needlessly allocated a flags buffer. This change uses tty_insert_flip_string_fixed_flag instead, which will allocate TTYB_NORMAL buffers if flag == TTY_NORMAL. Since we're only inserting one character, it's fine for the flag to be "fixed". OpenBMC-Staging-Count: 1 Signed-off-by: Jeremy Kerr Signed-off-by: Joel Stanley

net: phy: broadcom: add support for BCM54210E

2017-07-24T06:53:39+00:00

It's Broadcom PHY simply described as single-port RGMII 10/100/1000BASE-T PHY. It requires disabling delay skew and GTXCLK bits. Signed-off-by: Rafał Miłecki Signed-off-by: David S. Miller (cherry picked from commit 0fc9ae107669760c2a8658cb5b5876dbe525e08d) Signed-off-by: Joel Stanley

hw_random: timeriomem_rng: Allow setting RNG quality from platform data

2017-07-07T06:40:45+00:00

When a hw_random device's quality is non-zero, it will automatically be used to fill the kernel's entropy pool. Since timeriomem_rng is used by many different devices, the quality needs to be provided by platform data or device tree. Signed-off-by: Rick Altherr Signed-off-by: Herbert Xu (cherry picked from commit 284e76387c38260e834c99b010a68d75fc46b394) Signed-off-by: Joel Stanley