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| author | Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> | 2015-03-27 02:32:56 +0900 |
|---|---|---|
| committer | Kukjin Kim <kgene@kernel.org> | 2015-03-27 02:32:56 +0900 |
| commit | 497ab3b30c7687f52e6711e2ac72d1b696ec7685 (patch) | |
| tree | 54220f51a7de1ee57e7787c3fa2d03fca9e99cff /arch/arm/mach-exynos/firmware.c | |
| parent | 4e330ae4ab2915444f1e6dca1358a910aa259362 (diff) | |
| download | linux-497ab3b30c7687f52e6711e2ac72d1b696ec7685.tar.bz2 | |
ARM: EXYNOS: fix CPU1 hotplug on Exynos3250
CPU1 hotplug may hang when AFTR is used. Fix it by:
- setting AUTOWAKEUP_EN bit in ARM_COREx_CONFIGURATION register in
exynos_cpu_power_up()
- not clearing reserved bits of ARM_COREx_CONFIGURATION register in
exynos_cpu_power_down()
- waiting while an undocumented register 0x0908 becomes non-zero in
exynos_core_restart()
- using dsb_sev() instead of IPI in exynos_boot_secondary() on
Exynos3250
This patch also fixes hotplug issues during resume from S2R:
$ echo mem > /sys/power/state
[ 156.517266] Disabling non-boot CPUs ...
[ 156.517781] IRQ18 no longer affine to CPU1
[ 156.518043] CPU1: shutdown
[ 156.544718] Enabling non-boot CPUs ...
[ 156.554925] CPU1: Software reset
[ 158.552631] CPU1: failed to come online
[ 158.552753] Error taking CPU1 up: -5
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Tested-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Tested-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
Diffstat (limited to 'arch/arm/mach-exynos/firmware.c')
0 files changed, 0 insertions, 0 deletions