kernel.git/drivers/tty/serial/earlycon.c, branch linux-4.11.y

ACPI: parse SPCR and enable matching console

2016-09-28T15:46:46Z

'ARM Server Base Boot Requiremets' [1] mentions SPCR (Serial Port Console Redirection Table) [2] as a mandatory ACPI table that specifies the configuration of serial console. Defer initialization of DT earlycon until ACPI/DT decision is made. Parse the ACPI SPCR table, setup earlycon if required, enable specified console. Thanks to Peter Hurley for explaining how this should work. [1] http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.den0044a/index.html [2] https://msdn.microsoft.com/en-us/library/windows/hardware/dn639132(v=vs.85).aspx Signed-off-by: Aleksey Makarov Acked-by: Rafael J. Wysocki Reviewed-by: Peter Hurley Tested-by: Kefeng Wang Tested-by: Christopher Covington Signed-off-by: Greg Kroah-Hartman

of/serial: move earlycon early_param handling to serial

2016-09-28T15:43:15Z

We have multiple "earlycon" early_param handlers - merge the DT one into the main earlycon one. It's a cleanup that also will be useful to defer setting up DT console until ACPI/DT decision is made. Rename the exported function to avoid clashing with the function from arch/microblaze/kernel/prom.c Signed-off-by: Leif Lindholm Signed-off-by: Aleksey Makarov Acked-by: Rob Herring Acked-by: Greg Kroah-Hartman Reviewed-by: Peter Hurley Tested-by: Kefeng Wang Tested-by: Christopher Covington Signed-off-by: Greg Kroah-Hartman

serial: earlycon: Extend earlycon command line option to support 64-bit addresses

2016-09-02T13:03:35Z

earlycon implementation used "unsigned long" internally, but there are systems (ARM with LPAE) where sizeof(unsigned long) == 4 and uart is mapped beyond 4GiB address range. Switch to resource_size_t internally and replace obsoleted simple_strtoul() with kstrtoull(). Signed-off-by: Alexander Sverdlin Signed-off-by: Greg Kroah-Hartman

serial: earlycon: Show the earlycon "driver" in banner

2016-02-07T06:07:37Z

Output the earlycon "driver" from the just-parsed console 'name' and 'index' fields. NB: ->mapbase is a resource_size_t so use %pa format specifier Acked-by: Rob Herring Signed-off-by: Peter Hurley Signed-off-by: Greg Kroah-Hartman

serial: earlycon: Common log banner for command line and DT

2016-02-07T06:07:37Z

Refactor the command line earlycon banner into earlycon_init() so both earlycon startup methods output an info banner. Acked-by: Rob Herring Signed-off-by: Peter Hurley Signed-off-by: Greg Kroah-Hartman

of: earlycon: Move address translation to of_setup_earlycon()

2016-02-07T06:07:37Z

Cleanup the early DT/earlycon separation; remove the 'addr' parameter from of_setup_earlycon() and get the uart phys addr directly with a new wrapper function, of_flat_dt_translate_addr(). Limit fdt_translate_address() to file scope. Acked-by: Rob Herring Signed-off-by: Peter Hurley Signed-off-by: Greg Kroah-Hartman

of: earlycon: Initialize port fields from DT properties

2016-02-07T06:07:37Z

Read the optional "reg-offset", "reg-shift", "reg-io-width" and endianness properties and initialize the respective struct uart_port field if found. NB: These bindings are common to several drivers and the values merely indicate the default value; the registering earlycon setup() method can simply override the values if required. Acked-by: Rob Herring Signed-off-by: Peter Hurley Signed-off-by: Greg Kroah-Hartman

of: earlycon: Add options string handling

2016-02-07T06:07:37Z

Pass-through any options string in the 'stdout-path' property to the earlycon "driver" setup. Acked-by: Rob Herring Signed-off-by: Peter Hurley Signed-off-by: Greg Kroah-Hartman

of: earlycon: Fixup earlycon console name and index

2016-02-07T06:07:37Z

Use the console name embedded in the OF earlycon table by the OF_EARLYCON_DECLARE() macro to initialize the struct console 'name' and 'index' fields. Acked-by: Rob Herring Signed-off-by: Peter Hurley Signed-off-by: Greg Kroah-Hartman

serial: earlycon: Fixup earlycon console name and index

2016-02-07T06:07:37Z

Properly initialize the struct console 'name' and 'index' fields for the registering earlycon. For earlycons w/o trailing numerals, the index is set to 0; otherwise, the index is set to the value of the trailing numeral. For example, the 'exynos4210' earlycon name == "exynos" and index == 4210. Earlycons with embedded numerals will have all non-trailing numerals as part of the name; for example, the 's3c2412' earlycon name == "s3c" and index == 2412. This ackward scheme was initially added for the uart8250 earlycon; adopt this scheme for the other earlycon "drivers". Introduce earlycon_init() which performs the string scanning and initializes the name and index fields; encapsulate the other console field initializations within. Acked-by: Rob Herring Signed-off-by: Peter Hurley Signed-off-by: Greg Kroah-Hartman