kernels: add linux-libre-aarch64

Some System On a Chip (SOC) have 64bit ARM CPUs that are also
capable of running arm 32bit applications.

Since:
- Parabola doesn't have an aarch64 package repository yet
- The devicetree of devices using such System On a Chip
  are not compiled when using the armv7 defconfig
- Drivers or other platform support code for such hardware
  might also not be compiled in with the armv7 defconfig
- This approach has already been tested with the linux-libre-x86_64
  kenrel

It's then a good idea to add support for such devices by adding
an arrch64 kernel as the maintenance and work is minimal.

The downside is that the external kernel modules that are either
compiled against the kernel or using DKMS will not work by default.

It's however still possible to compile them by hand by using
ARCH= and CROSS_COMPILE= as it is done for this kernel, so it
should be relatively easy to add support for the non-dkms modules.

As for DKMS, someone would need to look into it to understand how
to pass it the make flags (ARCH= and CROSS_COMPILE=) that are
required to automatically build modules.

Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>

1 files changed, 37 insertions, 0 deletions

diff --git a/kernels/linux-libre-arm64/0002-fix-Atmel-maXTouch-touchscreen-support.patch b/kernels/linux-libre-arm64/0002-fix-Atmel-maXTouch-touchscreen-support.patch
new file mode 100644
index 000000000..5ad26fc9e
--- /dev/null
+++ b/kernels/linux-libre-arm64/0002-fix-Atmel-maXTouch-touchscreen-support.patch
@@ -0,0 +1,37 @@
+From ab8cc1b2dc1b716d5c08f72dacbe1eded269f304 Mon Sep 17 00:00:00 2001
+From: André Silva <emulatorman@parabola.nu>
+Date: Tue, 22 Mar 2016 17:58:59 -0300
+Subject: [PATCH 2/2] fix Atmel maXTouch touchscreen support
+
+The Atmel maXTouch touchscreen works with Linux-libre 3.13-gnu,
+but not with the current longterm and mainline kernels in
+Parabola.
+
+Now it needs to load nonfree firmware in mxt_initialize(),
+which is in drivers/input/touchscreen/atmel_mxt_ts.c, and the
+atmel_mxt_ts driver fails to work.
+
+This driver works if changing reject_firmware_nowait to
+request_firmware_nowait in atmel_mxt_ts.c. This line is
+requesting the file named MXT_CFG_NAME, and it's a config file,
+not the firmware blob.
+
+Signed-off-by: André Silva <emulatorman@parabola.nu>
+Signed-off-by: mytbk <mytbk920423@gmail.com>
+---
+ drivers/input/touchscreen/atmel_mxt_ts.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
+index 726a83e..d818834 100644
+--- a/drivers/input/touchscreen/atmel_mxt_ts.c
++++ b/drivers/input/touchscreen/atmel_mxt_ts.c
+@@ -1989,7 +1989,7 @@ static int mxt_initialize(struct mxt_data *data)
+ 	if (error)
+ 		goto err_free_object_table;
+ 
+-	error = reject_firmware_nowait(THIS_MODULE, true, MXT_CFG_NAME,
++	error = request_firmware_nowait(THIS_MODULE, true, MXT_CFG_NAME,
+ 					&client->dev, GFP_KERNEL, data,
+ 					mxt_config_cb);
+ 	if (error) {