common: machine_id: introduce machine id generation ...

This patch adds functionality to pass device-specific information that
will be hashed to generate a persistent unique machine id. It is then
available as global.machine_id. It can be overwritten with
nv.machine_id if necessary. Passing the machine id to the kernel is
done in a separate patch.

Note: if multiple sources provide hashable device-specific information
(via machine_id_set_hashable()) the information provided by the last call
prior to the late initcall set_machine_id() is used to generate the
machine id from. Thus when updating barebox the machine id might change.

Signed-off-by: Bastian Krause <bst@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

digest.h: needs errno definitions ...

digest_set_key() returns -ENOTSUPP conditionally, so include errno.h.

Fixes: 2f3c3f512b ("digest: add HMAC support for md5, sha1, sha224, sha256, sha384, sha512")
Signed-off-by: Juergen Borleis <jbe@pengutronix.de>
Signed-off-by: Bastian Krause <bst@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: nand: Fix retrieving nand_chip from mtd_info ...

With 76b6f74c53 we begin embedding a struct mtd_info into struct
nand_chip. With this mtd_to_nand() must be changed accordingly.

Fixes: 76b6f74c53 ("mtd: nand: Embed struct mtd_info into struct nand_chip")
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

clk: i.MX6qp: Fix location of the enfc_sel mux ...

On the i.MX6qp the enfc_sel mux is at bits 15-17, not on 16-17. Fix
this. During clock tree initialization we reparented the enfc_sel to:

	clk_set_parent(clks[IMX6QDL_CLK_ENFC_SEL], clks[IMX6QDL_CLK_PLL2_PFD2_396M]);

This resulted in a register setting 0b110 for the enfc_sel mux which is
reserved. Apparently this reserved setting resulted in the enfc clock
being driven from pll3_pfd3_454m. This means our enfc clock was the
factor 454/396 too high.

With b534f79112f0 ("clk: imx6: Fix procedure to switch the parent of
LDB_DI_CLK") we happened to disable pll3_pfd3_454m during init, so with
this commit NAND stopped working entirely on i.MX6qp.

Both issues are fixed with this patch

Fixes: b534f79112f0 ("clk: imx6: Fix procedure to switch the parent of LDB_DI_CLK")
Fixes: 92fd61d12723 ("clk: i.MX6: Fix enfc_sel for i.MX6dqp")

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

bootm: release tee_res ...

When a tee_res has been acquired it must be released when bootm returns
(for dryrun)

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Reviewed-by: Rouven Czerwinski <r.czerwinski@pengutronix.de>

gcc-9: silence 'address-of-packed-member' warning ...

As done in the Linux Kernel. Most of the packed structures we have
are optimized to not generate any unaligned accesses, so this warning
produces a lot of false positives which are hard to fix in the code.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/tftp'

Merge branch 'for-next/stm32'

Merge branch 'for-next/socfpga'

Merge branch 'for-next/sandbox'

Merge branch 'for-next/reset-source'

Merge branch 'for-next/qemu'

Merge branch 'for-next/omap'

Merge branch 'for-next/net'

Merge branch 'for-next/mtd'

Merge branch 'for-next/misc'

Merge branch 'for-next/mips'

Merge branch 'for-next/imx'

Merge branch 'for-next/fsanitize'

Merge branch 'for-next/for-master'

Merge branch 'for-next/dts'

Merge branch 'for-next/arm'

Release v2019.09.0 ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

watchdog: add support for STPMIC1 integrated watchdog ...

The driver adds support for the PMIC's watchdog, reset, poweroff
and reset reason query capabilities.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mfd: add support for STPMIC1 ...

The PMIC is addressable over I2C and, besides power management,
integrates a watchdog, a user power on key handling and 64 bit of
non-volatile memory.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

i2c: add stm32f7 I2C adapter driver ...

This patch adds initial support for the STM32F7 I2C controller.
It was tested to work with the STM32MP157C.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

i2c: port Linux i2c_parse_fw_timings ...

Linux has a generic function for extracting i2c timings parameters from
device-associated firmware nodes. Port this function to barebox, but
have it only work on device tree nodes for now.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

hwrng: add sandbox driver interface to host /dev/random ...

Linux as well as other operating systems can provide /dev/random and
/dev/urandom device to service userspace need for randomness.
Add a driver to use /dev/random for blocking and /dev/urandom for
non-blocking barebox random numbers.

Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

sandbox: dts: add example for barebox, hostfile backed state ...

Previous commit now allows probing barebox,hostfile to be probed from
device tree. Add a barebox state node that shows how to use it. It's not
included by default, same as barebox-libftdi-example.dtsi in the same
directory.

Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

sandbox: hostfile: allow probing from device tree ...

When testing things like barebox state in sandbox, it's nice to be able
to refer to a partition on a hostfile by phandle. Support this by
checking for reading the barebox,filename property.

Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>