| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <20130320072930.GC26941@S2101-09.ap.freescale.net>
Date: Wed, 20 Mar 2013 15:29:33 +0800
From: Shawn Guo <shawn.guo@...aro.org>
To: Anson Huang <b20788@...escale.com>
CC: <linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>, <kernel@...gutronix.de>,
<linux@....linux.org.uk>
Subject: Re: [PATCH 1/3] ARM: imx: enable anatop suspend/resume
On Wed, Mar 20, 2013 at 01:39:38PM -0400, Anson Huang wrote:
> anatop module have sereval configurations for user
> to reduce the power consumption in suspend, provide
> suspend/resume interface for further use and enable
> fet_odrive to reduce CORE LDO leakage during suspend.
>
> Signed-off-by: Anson Huang <b20788@...escale.com>
> ---
> arch/arm/mach-imx/Kconfig | 4 ++++
> arch/arm/mach-imx/Makefile | 1 +
> arch/arm/mach-imx/anatop.c | 50 ++++++++++++++++++++++++++++++++++++++++
I like the idea of having an anatop.c for all those anatop related
setup. Please move those anatop related code in mach-imx6q.c
into there as well. Leaving them out there beats the idea of having
a centralized place for anatop configurations.
> arch/arm/mach-imx/common.h | 3 +++
> arch/arm/mach-imx/mach-imx6q.c | 1 +
> arch/arm/mach-imx/pm-imx6q.c | 2 ++
> 6 files changed, 61 insertions(+)
> create mode 100644 arch/arm/mach-imx/anatop.c
>
> diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
> index 4c9c6f9..7abaa6e 100644
> --- a/arch/arm/mach-imx/Kconfig
> +++ b/arch/arm/mach-imx/Kconfig
> @@ -74,6 +74,9 @@ config HAVE_IMX_MMDC
> config HAVE_IMX_SRC
> def_bool y if SMP
>
> +config HAVE_IMX_ANATOP
> + bool
> +
Please have it added before "config HAVE_IMX_GPC". We are trying to
have them sorted in alphabet.
> config IMX_HAVE_IOMUX_V1
> bool
>
> @@ -816,6 +819,7 @@ config SOC_IMX6Q
> select HAVE_IMX_GPC
> select HAVE_IMX_MMDC
> select HAVE_IMX_SRC
> + select HAVE_IMX_ANATOP
Ditto
> select HAVE_SMP
> select MFD_SYSCON
> select PINCTRL
> diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile
> index c4ce090..f4badaa 100644
> --- a/arch/arm/mach-imx/Makefile
> +++ b/arch/arm/mach-imx/Makefile
> @@ -95,6 +95,7 @@ obj-$(CONFIG_MACH_VPR200) += mach-vpr200.o
> obj-$(CONFIG_HAVE_IMX_GPC) += gpc.o
> obj-$(CONFIG_HAVE_IMX_MMDC) += mmdc.o
> obj-$(CONFIG_HAVE_IMX_SRC) += src.o
> +obj-$(CONFIG_HAVE_IMX_ANATOP) += anatop.o
Ditto
> AFLAGS_headsmp.o :=-Wa,-march=armv7-a
> obj-$(CONFIG_SMP) += headsmp.o platsmp.o
> obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o
> diff --git a/arch/arm/mach-imx/anatop.c b/arch/arm/mach-imx/anatop.c
> new file mode 100644
> index 0000000..8f6ab27
> --- /dev/null
> +++ b/arch/arm/mach-imx/anatop.c
> @@ -0,0 +1,50 @@
> +/*
> + * Copyright (C) 2013 Freescale Semiconductor, Inc.
> + *
> + * The code contained herein is licensed under the GNU General Public
> + * License. You may obtain a copy of the GNU General Public License
> + * Version 2 or later at the following locations:
> + *
> + * http://www.opensource.org/licenses/gpl-license.html
> + * http://www.gnu.org/copyleft/gpl.html
> + */
> +
> +#include <linux/err.h>
> +#include <linux/io.h>
> +#include <linux/of.h>
> +#include <linux/of_address.h>
> +#include <linux/mfd/syscon.h>
> +#include <linux/regmap.h>
> +
> +#define REG_SET 0x4
> +#define REG_CLR 0x8
> +#define ANA_REG_CORE 0x140
The abbreviation ANA is used here ...
> +
> +#define BM_ANADIG_REG_CORE_FET_ODRIVE 0x20000000
... while "ANADIG" is here. Please be consistent.
> +
> +static struct regmap *anatop;
> +
> +void imx_anatop_enable_fet_odrive(bool enable)
static?
> +{
> + regmap_write(anatop, ANA_REG_CORE + (enable ?
> + REG_SET : REG_CLR), BM_ANADIG_REG_CORE_FET_ODRIVE);
This is a nit, but I think the following indent is nicer for reading.
regmap_write(anatop, ANA_REG_CORE + (enable ? REG_SET : REG_CLR),
BM_ANADIG_REG_CORE_FET_ODRIVE);
> +}
> +
> +void imx_anatop_pre_suspend(void)
static?
Shawn
> +{
> + imx_anatop_enable_fet_odrive(true);
> +}
> +
> +void imx_anatop_post_resume(void)
> +{
> + imx_anatop_enable_fet_odrive(false);
> +}
> +
> +void __init imx_anatop_init(void)
> +{
> + anatop = syscon_regmap_lookup_by_compatible("fsl,imx6q-anatop");
> + if (IS_ERR(anatop)) {
> + pr_err("%s: failed to find imx6q-anatop regmap!\n", __func__);
> + return;
> + }
> +}
> diff --git a/arch/arm/mach-imx/common.h b/arch/arm/mach-imx/common.h
> index 5a800bf..004c2b3 100644
> --- a/arch/arm/mach-imx/common.h
> +++ b/arch/arm/mach-imx/common.h
> @@ -129,6 +129,9 @@ extern void imx_src_prepare_restart(void);
> extern void imx_gpc_init(void);
> extern void imx_gpc_pre_suspend(void);
> extern void imx_gpc_post_resume(void);
> +extern void imx_anatop_init(void);
> +extern void imx_anatop_pre_suspend(void);
> +extern void imx_anatop_post_resume(void);
> extern int imx6q_set_lpm(enum mxc_cpu_pwr_mode mode);
> extern void imx6q_set_chicken_bit(void);
>
> diff --git a/arch/arm/mach-imx/mach-imx6q.c b/arch/arm/mach-imx/mach-imx6q.c
> index 9ffd103..aa867db 100644
> --- a/arch/arm/mach-imx/mach-imx6q.c
> +++ b/arch/arm/mach-imx/mach-imx6q.c
> @@ -197,6 +197,7 @@ static void __init imx6q_init_machine(void)
>
> of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
>
> + imx_anatop_init();
> imx6q_pm_init();
> imx6q_usb_init();
> imx6q_1588_init();
> diff --git a/arch/arm/mach-imx/pm-imx6q.c b/arch/arm/mach-imx/pm-imx6q.c
> index 5faba7a..05b26cd 100644
> --- a/arch/arm/mach-imx/pm-imx6q.c
> +++ b/arch/arm/mach-imx/pm-imx6q.c
> @@ -34,10 +34,12 @@ static int imx6q_pm_enter(suspend_state_t state)
> case PM_SUSPEND_MEM:
> imx6q_set_lpm(STOP_POWER_OFF);
> imx_gpc_pre_suspend();
> + imx_anatop_pre_suspend();
> imx_set_cpu_jump(0, v7_cpu_resume);
> /* Zzz ... */
> cpu_suspend(0, imx6q_suspend_finish);
> imx_smp_prepare();
> + imx_anatop_post_resume();
> imx_gpc_post_resume();
> imx6q_set_lpm(WAIT_CLOCKED);
> break;
> --
> 1.7.9.5
>
>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists