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authorBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>2015-01-24 08:05:50 +0300
committerKukjin Kim <kgene@kernel.org>2015-01-30 02:39:15 +0300
commit712eddf70225ab5ae65e946e22d2dfe6b93e8dd1 (patch)
tree62477a0a4b364cd2e87786481ee6dfe03e3fd569 /include/linux/platform_data/cpuidle-exynos.h
parent865e8b76a04d018f23d809ebf735c52105e3adb2 (diff)
downloadlinux-712eddf70225ab5ae65e946e22d2dfe6b93e8dd1.tar.xz
cpuidle: exynos: add coupled cpuidle support for exynos4210
The following patch adds coupled cpuidle support for Exynos4210 to an existing cpuidle-exynos driver. As a result it enables AFTR mode to be used by default on Exynos4210 without the need to hot unplug CPU1 first. The patch is heavily based on earlier cpuidle-exynos4210 driver from Daniel Lezcano: http://www.spinics.net/lists/linux-samsung-soc/msg28134.html Changes from Daniel's code include: - porting code to current kernels - fixing it to work on my setup (by using S5P_INFORM register instead of S5P_VA_SYSRAM one on Revison 1.1 and retrying poking CPU1 out of the BOOT ROM if necessary) - fixing rare lockup caused by waiting for CPU1 to get stuck in the BOOT ROM (CPU hotplug code in arch/arm/mach-exynos/platsmp.c doesn't require this and works fine) - moving Exynos specific code to arch/arm/mach-exynos/pm.c - using cpu_boot_reg_base() helper instead of BOOT_VECTOR macro - using exynos_cpu_*() helpers instead of accessing registers directly - using arch_send_wakeup_ipi_mask() instead of dsb_sev() (this matches CPU hotplug code in arch/arm/mach-exynos/platsmp.c) - integrating separate exynos4210-cpuidle driver into existing exynos-cpuidle one Cc: Colin Cross <ccross@google.com> Cc: Kukjin Kim <kgene.kim@samsung.com> Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com> Cc: Tomasz Figa <tomasz.figa@gmail.com> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Kukjin Kim <kgene@kernel.org>
Diffstat (limited to 'include/linux/platform_data/cpuidle-exynos.h')
-rw-r--r--include/linux/platform_data/cpuidle-exynos.h20
1 files changed, 20 insertions, 0 deletions
diff --git a/include/linux/platform_data/cpuidle-exynos.h b/include/linux/platform_data/cpuidle-exynos.h
new file mode 100644
index 000000000000..bfa40e4c5d5f
--- /dev/null
+++ b/include/linux/platform_data/cpuidle-exynos.h
@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2014 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#ifndef __CPUIDLE_EXYNOS_H
+#define __CPUIDLE_EXYNOS_H
+
+struct cpuidle_exynos_data {
+ int (*cpu0_enter_aftr)(void);
+ int (*cpu1_powerdown)(void);
+ void (*pre_enter_aftr)(void);
+ void (*post_enter_aftr)(void);
+};
+
+#endif