lwn.git/arch/arm/mach-ux500/cpu-db8500.c, branch standardize-docs

ARM: ux500: resume the second core properly

2017-03-02T16:53:17+00:00

The pen hold/release scheme was copied over to Ux500 from the ARM reference designs like most of these at the time. It is not needed at all, and was mostly removed in commit c00def71efd9 "ARM: ux500: simplify secondary CPU boot". However on the suspend/resume path and hot plug/unplug of CPUs, the .cpu_die() callback was still waiting for the pen to be released which made it spin forever and the second core never come back online after suspend/resume. Fix this by simply replacing the strange custom .cpu_die() with a oneline wfi() just like e.g. the qcom platform does. This fixes the issue and makes the second core come up properly after suspend/resume. As a side effect, this rids us of the completely surplus local setup.h and hotplug.c files, and we just compile this into platsmp.c with everything else SMP. Cc: stable@vger.kernel.org Fixes: c00def71efd9 ("ARM: ux500: simplify secondary CPU boot") Cc: Ulf Hansson Signed-off-by: Linus Walleij Signed-off-by: Arnd Bergmann

ARM: ux500: cut some platform data

2017-02-07T15:01:04+00:00

This platform data is revoked: the drivers are getting the DMA configuration from the device tree, it has been done like that since the DMA support was merged and this data has not been used since. The remaining auxdata is also unused. Acked-by: Arnd Bergmann Signed-off-by: Linus Walleij Signed-off-by: Arnd Bergmann

ARM: ux500: remove duplicated include from cpu-db8500.c

2017-01-12T13:02:34+00:00

Remove duplicated include. Signed-off-by: Wei Yongjun Signed-off-by: Linus Walleij

ARM: ux500: consolidate base platform files

2016-07-12T09:24:09+00:00

The cpu.c and cache-l2x0.c files hold only two or three simple functions each, and they are all called from the machine descriptors, so we can just move them all into the same file for simplicity and consistency. Signed-off-by: Arnd Bergmann Signed-off-by: Linus Walleij

ARM: ux500: move soc_id driver to drivers/soc

2016-07-12T09:24:09+00:00

As the ux500 id code is basically a standalone driver, we can move it out of the arch code into drivers/soc/ux500. This is a user-visible change, as it moves all the devices in sysfs from /sys/devices/soc0/ to /sys/devices/ and leaves the soc0 node as a separate device. Originally the idea was to put all on-chip devices under the soc node, and ux500 was the first platform to have this device, but later platforms almost all didn't follow that pattern, so this makes the platform do the same thing as everyone else. Since the platform is really obsolete now, I am optimistic that nothing will break after moving the devices around. As the SoC driver no longer has access to the private header files, I'm changing the code to instead look up the address of the backupram from devicetree, which is a good idea anyway. Finally, having a separate Kconfig symbol means the driver is now optional and could even be a loadable module rather than always being built-in if we allowed that for soc_device. Signed-off-by: Arnd Bergmann [Fixup mising Makefile, fixup BB_UID_BASE to fc0] Signed-off-by: Linus Walleij

ARM: ux500: call ux500_setup_id later

2016-07-12T09:24:08+00:00

ux500_setup_id is currently called from u8500_map_io(), which is really early, but nothing relies on the ID any more, other than a printk message that is not really all that important to have early during boot. If we move the call to ux500_setup_id() into ux500_soc_device_init(), that file becomes usuable almost entirely standalone, and we can kill off the u8500_map_io() callback as it just does the default debug_ll_io_init() now. Signed-off-by: Arnd Bergmann Signed-off-by: Linus Walleij

ARM: ux500: consolidate soc_device code in id.c

2016-07-12T09:24:08+00:00

Nothing else uses the global dbx500_asic_id structure, so we can merge the two small files that reference it into one. Signed-off-by: Arnd Bergmann Signed-off-by: Linus Walleij

ARM: ux500: move l2x0 init to .init_irq

2016-07-12T09:24:06+00:00

The generic IRQ init function also enables the l2 cache implicitly when the machine descriptor sets an .l2c_aux_mask. Let's use that on ux500 and remove the ux500_l2x0_init() along with the cpu_is_u8500_family checks. Signed-off-by: Arnd Bergmann Signed-off-by: Linus Walleij

mfd: db8500 stop passing around platform data

2016-07-12T09:23:58+00:00

Except for the constant DB8500_PRCMU_FW_VERSION_OFFSET number, nothing is ever passed through the platform data and used in a driver, so we can simply stop passing it around. Acked-by: Lee Jones Signed-off-by: Arnd Bergmann Signed-off-by: Linus Walleij

ARM: ux500: move ab8500_regulator_plat_data into driver

2016-07-12T09:23:50+00:00

There is only one instance of ab8500_regulator_platform_data, and it's safe to assume we won't ever merge another one, so it's rather pointless to pass it through multiple levels of platform data pointers. This moves the structure and everything referenced by it into the driver that uses it. Signed-off-by: Arnd Bergmann Acked-by: Mark Brown Signed-off-by: Linus Walleij