[PATCH v2 5/5] cpuidle: ARM: Add cpuidle driver for K1879XB1YA
From: Sudeep Holla <hidden>
Date: 2015-06-30 16:24:45
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On 30/06/15 16:15, Andrew Andrianov wrote:
quoted hunk ↗ jump to hunk
Signed-off-by: Andrew Andrianov <redacted> --- drivers/cpuidle/Kconfig.arm | 6 +++++ drivers/cpuidle/Makefile | 1 + drivers/cpuidle/cpuidle-rcm-k1879xb1.c | 48 ++++++++++++++++++++++++++++++++++ 3 files changed, 55 insertions(+) create mode 100644 drivers/cpuidle/cpuidle-rcm-k1879xb1.cdiff --git a/drivers/cpuidle/Kconfig.arm b/drivers/cpuidle/Kconfig.arm index 21340e0..988bfa3 100644 --- a/drivers/cpuidle/Kconfig.arm +++ b/drivers/cpuidle/Kconfig.arm@@ -74,3 +74,9 @@ config ARM_MVEBU_V7_CPUIDLE depends on ARCH_MVEBU && !ARM64 help Select this to enable cpuidle on Armada 370, 38x and XP processors. + +config ARM_RCM_K1879XB1_CPUIDLE + bool "CPU Idle Driver for RC Module's K1879XB1YA SoC" + depends on ARCH_RCM_K1879XB1 && !ARM64 + help + Select this to enable cpuidle on K1879XB1YA SoC.diff --git a/drivers/cpuidle/Makefile b/drivers/cpuidle/Makefile index 3ba81b1..71b7e16 100644 --- a/drivers/cpuidle/Makefile +++ b/drivers/cpuidle/Makefile@@ -17,6 +17,7 @@ obj-$(CONFIG_ARM_ZYNQ_CPUIDLE) += cpuidle-zynq.o obj-$(CONFIG_ARM_U8500_CPUIDLE) += cpuidle-ux500.o obj-$(CONFIG_ARM_AT91_CPUIDLE) += cpuidle-at91.o obj-$(CONFIG_ARM_EXYNOS_CPUIDLE) += cpuidle-exynos.o +obj-$(CONFIG_ARM_RCM_K1879XB1_CPUIDLE) += cpuidle-rcm-k1879xb1.o obj-$(CONFIG_ARM_CPUIDLE) += cpuidle-arm.o ###############################################################################diff --git a/drivers/cpuidle/cpuidle-rcm-k1879xb1.c b/drivers/cpuidle/cpuidle-rcm-k1879xb1.c new file mode 100644 index 0000000..7c621b6 --- /dev/null +++ b/drivers/cpuidle/cpuidle-rcm-k1879xb1.c@@ -0,0 +1,48 @@ +/* + * CPU idle for RC Module K1879XB1YA SoC + * + * Copyright (C) 2015 RC Module. + * http://www.module.ru/ + * + * Andrew Andrianov <andrew@ncrmnt.org> + * + * Based on Davinci CPU idle code + * (arch/arm/mach-davinci/cpuidle.c) + * + * 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. + */ + +#include <linux/io.h> +#include <linux/platform_device.h> +#include <linux/cpuidle.h> +#include <asm/cpuidle.h> + +/* + * We only enable WFI here, since DDR will enter self-refresh + * on it's own when it can (bootloader takes care to configure that) + */ + +static struct cpuidle_driver rcm_idle_driver = { + .name = "rcm_k1879xb1_idle", + .states[0] = ARM_CPUIDLE_WFI_STATE,
Do you plan to add more states in future ? Otherwise default_idle_call will be sufficient to enter WFI and you need not register any cpuidle driver. Regards, Sudeep