From: Daniel Lezcano <daniel.lezcano@linaro.org>
To: Lina Iyer <lina.iyer@linaro.org>,
khilman@linaro.org, sboyd@codeaurora.org, galak@codeaurora.org,
linux-arm-msm@vger.kernel.org, linux-pm@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Cc: lorenzo.pieralisi@arm.com, msivasub@codeaurora.org,
devicetree@vger.kernel.org
Subject: Re: [PATCH v9 6/9] qcom: cpuidle: Add cpuidle driver for QCOM cpus
Date: Sun, 16 Nov 2014 22:20:26 +0100 [thread overview]
Message-ID: <5469151A.20205@linaro.org> (raw)
In-Reply-To: <1414194024-55547-7-git-send-email-lina.iyer@linaro.org>
On 10/25/2014 01:40 AM, Lina Iyer wrote:
> Add cpuidle driver interface to allow cpus to go into C-States. Use the
> cpuidle DT interface, common across ARM architectures, to provide the
> C-State information to the cpuidle framework.
>
> Supported modes at this time are Standby and Standalone Power Collapse.
>
> Signed-off-by: Lina Iyer <lina.iyer@linaro.org>
A few comments below, otherwise it looks good to me.
> ---
[ ... ]
> +[1]. Documentation/devicetree/bindings/arm/idle-states.txt
> diff --git a/drivers/cpuidle/Kconfig.arm b/drivers/cpuidle/Kconfig.arm
> index 8c16ab2..13c7c1f 100644
> --- a/drivers/cpuidle/Kconfig.arm
> +++ b/drivers/cpuidle/Kconfig.arm
> @@ -63,3 +63,10 @@ config ARM_MVEBU_V7_CPUIDLE
> depends on ARCH_MVEBU
> help
> Select this to enable cpuidle on Armada 370, 38x and XP processors.
> +
> +config ARM_QCOM_CPUIDLE
> + bool "CPU Idle drivers for Qualcomm processors"
> + depends on QCOM_PM
Could you stick to the ARCH dependency as the other drivers ?
> + select DT_IDLE_STATES
> + help
> + Select this to enable cpuidle for QCOM processors
> diff --git a/drivers/cpuidle/Makefile b/drivers/cpuidle/Makefile
> index 4d177b9..6c222d5 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_QCOM_CPUIDLE) += cpuidle-qcom.o
>
> ###############################################################################
> # MIPS drivers
> diff --git a/drivers/cpuidle/cpuidle-qcom.c b/drivers/cpuidle/cpuidle-qcom.c
> new file mode 100644
> index 0000000..1c1dcbc
> --- /dev/null
> +++ b/drivers/cpuidle/cpuidle-qcom.c
> @@ -0,0 +1,72 @@
> +/*
> + * Copyright (c) 2014, Linaro Limited.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 and
> + * only version 2 as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + */
> +
> +#include <linux/cpuidle.h>
> +#include <linux/module.h>
> +#include <linux/platform_device.h>
> +
> +#include <soc/qcom/pm.h>
> +#include "dt_idle_states.h"
> +
> +static struct qcom_cpu_pm_ops *lpm_ops;
> +
> +static int qcom_cpu_stby(struct cpuidle_device *dev,
> + struct cpuidle_driver *drv, int index)
> +{
> + lpm_ops->standby(NULL);
No check ?
> + return index;
> +}
> +
> +static int qcom_cpu_spc(struct cpuidle_device *dev,
> + struct cpuidle_driver *drv, int index)
> +{
> + lpm_ops->spc(NULL);
No check ?
> + return index;
> +}
> +
> +static struct cpuidle_driver qcom_cpuidle_driver = {
> + .name = "qcom_cpuidle",
> +};
> +
> +static const struct of_device_id qcom_idle_state_match[] = {
> + { .compatible = "qcom,idle-state-stby", .data = qcom_cpu_stby},
> + { .compatible = "qcom,idle-state-spc", .data = qcom_cpu_spc },
> + { },
> +};
> +
> +static int qcom_cpuidle_probe(struct platform_device *pdev)
> +{
> + struct cpuidle_driver *drv = &qcom_cpuidle_driver;
> + int ret;
> +
> + lpm_ops = pdev->dev.platform_data;
> +
> + /* Probe for other states, including standby */
> + ret = dt_init_idle_driver(drv, qcom_idle_state_match, 0);
> + if (ret < 0)
> + return ret;
> +
> + return cpuidle_register(drv, NULL);
> +}
> +
> +static struct platform_driver qcom_cpuidle_plat_driver = {
> + .probe = qcom_cpuidle_probe,
> + .driver = {
> + .name = "qcom_cpuidle",
> + },
> +};
> +
> +module_platform_driver(qcom_cpuidle_plat_driver);
>
--
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next prev parent reply other threads:[~2014-11-16 21:20 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-24 23:40 [PATCH v9 0/9] cpuidle driver for QCOM SoCs: 8064, 8074, 8084 Lina Iyer
2014-10-24 23:40 ` [PATCH v9 1/9] qcom: scm: scm_set_warm_boot_addr() to set the warmboot address Lina Iyer
2014-11-14 8:30 ` Daniel Lezcano
2014-11-14 16:33 ` Lina Iyer
2014-10-24 23:40 ` [PATCH v9 2/9] qcom: spm: Add Subsystem Power Manager driver Lina Iyer
2014-11-14 15:56 ` Daniel Lezcano
2014-11-19 17:43 ` Lina Iyer
2014-11-26 11:19 ` Daniel Lezcano
2014-11-26 15:20 ` Lina Iyer
2014-11-26 15:22 ` Lina Iyer
2014-11-14 22:46 ` Stephen Boyd
2014-11-18 16:56 ` Lina Iyer
2014-11-18 20:28 ` Stephen Boyd
2014-11-17 21:32 ` Daniel Lezcano
2014-11-18 18:00 ` Lina Iyer
2014-11-18 19:39 ` Bjorn Andersson
2014-11-26 18:04 ` Kevin Hilman
2014-11-26 21:25 ` Daniel Lezcano
2014-10-24 23:40 ` [PATCH v9 3/9] arm: dts: qcom: Add power-controller device node for 8974 Krait CPUs Lina Iyer
2014-10-24 23:40 ` [PATCH v9 4/9] arm: dts: qcom: Add power-controller device node for 8084 " Lina Iyer
2014-10-24 23:40 ` [PATCH v9 5/9] arm: dts: qcom: Update power-controller device node for 8064 " Lina Iyer
2014-10-24 23:40 ` [PATCH v9 6/9] qcom: cpuidle: Add cpuidle driver for QCOM cpus Lina Iyer
2014-11-16 21:20 ` Daniel Lezcano [this message]
2014-11-17 18:30 ` Lina Iyer
2014-11-17 17:39 ` Lorenzo Pieralisi
2014-11-17 22:15 ` Lina Iyer
2014-10-24 23:40 ` [PATCH v9 7/9] arm: dts: qcom: Add idle states device nodes for 8974 Lina Iyer
2014-10-24 23:40 ` [PATCH v9 8/9] arm: dts: qcom: Add idle states device nodes for 8084 Lina Iyer
2014-10-24 23:40 ` [PATCH v9 9/9] arm: dts: qcom: Add idle state device nodes for 8064 Lina Iyer
2014-10-27 9:15 ` [PATCH v9 0/9] cpuidle driver for QCOM SoCs: 8064, 8074, 8084 Ivan T. Ivanov
2014-10-27 14:45 ` Lina Iyer
2014-11-13 20:25 ` Lina Iyer
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