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Date: Thu, 18 Aug 2011 18:56:39 +0100
From: Ralf Baechle <ralf@...ux-mips.org>
To: Lars-Peter Clausen <lars@...afoo.de>
Cc: linux-mips@...ux-mips.org, linux-kernel@...r.kernel.org,
"Rafael J. Wysocki" <rjw@...k.pl>, stable@...nel.org
Subject: Re: [PATCH 1/4] PM / MIPS: Use struct syscore_ops instead of sysdevs
for PM (v2)
Thanks, applied. This should also got into 3.0-stable.
Ralf
On Fri, Jun 03, 2011 at 03:06:48AM +0200, Lars-Peter Clausen wrote:
> From: Rafael J. Wysocki <rjw@...k.pl>
>
> Convert some MIPS architecture's code to using struct syscore_ops
> objects for power management instead of sysdev classes and sysdevs.
>
> This simplifies the code and reduces the kernel's memory footprint.
> It also is necessary for removing sysdevs from the kernel entirely in
> the future.
>
> Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
> Acked-by: Greg Kroah-Hartman <gregkh@...e.de>
> Acked-and-tested-by: Lars-Peter Clausen <lars@...afoo.de>
> Signed-off-by: Lars-Peter Clausen <lars@...afoo.de>
> ---
> arch/mips/jz4740/gpio.c | 52 +++++++++++++++++++---------------------------
> 1 files changed, 22 insertions(+), 30 deletions(-)
>
> diff --git a/arch/mips/jz4740/gpio.c b/arch/mips/jz4740/gpio.c
> index 73031f7..4397972 100644
> --- a/arch/mips/jz4740/gpio.c
> +++ b/arch/mips/jz4740/gpio.c
> @@ -18,7 +18,7 @@
> #include <linux/init.h>
>
> #include <linux/spinlock.h>
> -#include <linux/sysdev.h>
> +#include <linux/syscore_ops.h>
> #include <linux/io.h>
> #include <linux/gpio.h>
> #include <linux/delay.h>
> @@ -86,7 +86,6 @@ struct jz_gpio_chip {
> spinlock_t lock;
>
> struct gpio_chip gpio_chip;
> - struct sys_device sysdev;
> };
>
> static struct jz_gpio_chip jz4740_gpio_chips[];
> @@ -459,49 +458,47 @@ static struct jz_gpio_chip jz4740_gpio_chips[] = {
> JZ4740_GPIO_CHIP(D),
> };
>
> -static inline struct jz_gpio_chip *sysdev_to_chip(struct sys_device *dev)
> +static void jz4740_gpio_suspend_chip(struct jz_gpio_chip *chip)
> {
> - return container_of(dev, struct jz_gpio_chip, sysdev);
> + chip->suspend_mask = readl(chip->base + JZ_REG_GPIO_MASK);
> + writel(~(chip->wakeup), chip->base + JZ_REG_GPIO_MASK_SET);
> + writel(chip->wakeup, chip->base + JZ_REG_GPIO_MASK_CLEAR);
> }
>
> -static int jz4740_gpio_suspend(struct sys_device *dev, pm_message_t state)
> +static int jz4740_gpio_suspend(void)
> {
> - struct jz_gpio_chip *chip = sysdev_to_chip(dev);
> + int i;
>
> - chip->suspend_mask = readl(chip->base + JZ_REG_GPIO_MASK);
> - writel(~(chip->wakeup), chip->base + JZ_REG_GPIO_MASK_SET);
> - writel(chip->wakeup, chip->base + JZ_REG_GPIO_MASK_CLEAR);
> + for (i = 0; i < ARRAY_SIZE(jz4740_gpio_chips); i++)
> + jz4740_gpio_suspend_chip(&jz4740_gpio_chips[i]);
>
> return 0;
> }
>
> -static int jz4740_gpio_resume(struct sys_device *dev)
> +static void jz4740_gpio_resume_chip(struct jz_gpio_chip *chip)
> {
> - struct jz_gpio_chip *chip = sysdev_to_chip(dev);
> uint32_t mask = chip->suspend_mask;
>
> writel(~mask, chip->base + JZ_REG_GPIO_MASK_CLEAR);
> writel(mask, chip->base + JZ_REG_GPIO_MASK_SET);
> +}
>
> - return 0;
> +static void jz4740_gpio_resume(void)
> +{
> + int i;
> +
> + for (i = ARRAY_SIZE(jz4740_gpio_chips) - 1; i >= 0 ; i--)
> + jz4740_gpio_resume_chip(&jz4740_gpio_chips[i]);
> }
>
> -static struct sysdev_class jz4740_gpio_sysdev_class = {
> - .name = "gpio",
> +static struct syscore_ops jz4740_gpio_syscore_ops = {
> .suspend = jz4740_gpio_suspend,
> .resume = jz4740_gpio_resume,
> };
>
> -static int jz4740_gpio_chip_init(struct jz_gpio_chip *chip, unsigned int id)
> +static void jz4740_gpio_chip_init(struct jz_gpio_chip *chip, unsigned int id)
> {
> - int ret, irq;
> -
> - chip->sysdev.id = id;
> - chip->sysdev.cls = &jz4740_gpio_sysdev_class;
> - ret = sysdev_register(&chip->sysdev);
> -
> - if (ret)
> - return ret;
> + int irq;
>
> spin_lock_init(&chip->lock);
>
> @@ -519,22 +516,17 @@ static int jz4740_gpio_chip_init(struct jz_gpio_chip *chip, unsigned int id)
> irq_set_chip_and_handler(irq, &jz_gpio_irq_chip,
> handle_level_irq);
> }
> -
> - return 0;
> }
>
> static int __init jz4740_gpio_init(void)
> {
> unsigned int i;
> - int ret;
> -
> - ret = sysdev_class_register(&jz4740_gpio_sysdev_class);
> - if (ret)
> - return ret;
>
> for (i = 0; i < ARRAY_SIZE(jz4740_gpio_chips); ++i)
> jz4740_gpio_chip_init(&jz4740_gpio_chips[i], i);
>
> + register_syscore_ops(&jz4740_gpio_syscore_ops);
> +
> printk(KERN_INFO "JZ4740 GPIO initialized\n");
>
> return 0;
> --
> 1.7.2.5
--
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