Ugh...
This should be From: Jason Jin <[EMAIL PROTECTED]>, since
I've made only few small cleanups, the code itself is almost intact.
On Fri, Jun 06, 2008 at 11:24:43PM +0400, Anton Vorontsov wrote:
> This patch adds suspend (standby, not suspend-to-ram) support for MPC86xx
> processors.
>
> In standby mode MPC86xx is able to wakeup only upon external interrupts
> (including sreset).
>
> Signed-off-by: Scott Wood <[EMAIL PROTECTED]>
> Signed-off-by: Jason Jin <[EMAIL PROTECTED]>
> Signed-off-by: Anton Vorontsov <[EMAIL PROTECTED]>
> ---
> arch/powerpc/Kconfig | 2 +-
> arch/powerpc/platforms/86xx/Makefile | 1 +
> arch/powerpc/platforms/86xx/mpc86xx_suspend.c | 92
> +++++++++++++++++++++++++
> 3 files changed, 94 insertions(+), 1 deletions(-)
> create mode 100644 arch/powerpc/platforms/86xx/mpc86xx_suspend.c
>
> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
> index 2cde4e3..c45c71e 100644
> --- a/arch/powerpc/Kconfig
> +++ b/arch/powerpc/Kconfig
> @@ -192,7 +192,7 @@ config ARCH_HIBERNATION_POSSIBLE
>
> config ARCH_SUSPEND_POSSIBLE
> def_bool y
> - depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200
> + depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_86xx
>
> config PPC_DCR_NATIVE
> bool
> diff --git a/arch/powerpc/platforms/86xx/Makefile
> b/arch/powerpc/platforms/86xx/Makefile
> index 1b9b4a9..a8557df 100644
> --- a/arch/powerpc/platforms/86xx/Makefile
> +++ b/arch/powerpc/platforms/86xx/Makefile
> @@ -3,6 +3,7 @@
> #
>
> obj-$(CONFIG_SMP) += mpc86xx_smp.o
> +obj-$(CONFIG_SUSPEND) += mpc86xx_suspend.o
> obj-$(CONFIG_MPC8641_HPCN) += mpc86xx_hpcn.o
> obj-$(CONFIG_SBC8641D) += sbc8641d.o
> obj-$(CONFIG_MPC8610_HPCD) += mpc8610_hpcd.o
> diff --git a/arch/powerpc/platforms/86xx/mpc86xx_suspend.c
> b/arch/powerpc/platforms/86xx/mpc86xx_suspend.c
> new file mode 100644
> index 0000000..ce13e4c
> --- /dev/null
> +++ b/arch/powerpc/platforms/86xx/mpc86xx_suspend.c
> @@ -0,0 +1,92 @@
> +/*
> + * MPC86xx suspend (standby) support
> + *
> + * Copyright (C) 2008 Freescale Semiconductor, Inc. All rights reserved.
> + *
> + * Author: Jason Jin <[EMAIL PROTECTED]>
> + *
> + * 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/init.h>
> +#include <linux/types.h>
> +#include <linux/suspend.h>
> +#include <linux/of.h>
> +#include <linux/io.h>
> +#include <asm/prom.h>
> +#include <asm/reg.h>
> +#include <asm/mpc6xx.h>
> +
> +#define PMCSR_DEVSLEEP 0x00020000
> +
> +struct mpc86xx_pmc {
> + __be32 devdisr;
> + __be32 devdisr2;
> + __be32 reserve1;
> + __be32 reserve2;
> + __be32 powmgtcsr;
> +};
> +
> +static struct mpc86xx_pmc __iomem *pmc_regs_86xx;
> +
> +static int mpc86xx_suspend_enter(suspend_state_t state)
> +{
> + u32 tmp;
> +
> + /* Disable power management. */
> + tmp = mfmsr();
> + mtmsr(tmp & ~MSR_POW);
> +
> + /* Enable sleep mode, disable others. */
> + tmp = mfspr(SPRN_HID0);
> + mtspr(SPRN_HID0, (tmp & ~(HID0_DOZE | HID0_NAP)) | HID0_SLEEP);
> + asm("sync");
> +
> + /* Device power down. */
> + setbits32(&pmc_regs_86xx->powmgtcsr, PMCSR_DEVSLEEP);
> +
> + /* 86xx did not support deep sleep, let it enter standby mode. */
> + mpc6xx_enter_standby();
> +
> + clrbits32(&pmc_regs_86xx->powmgtcsr, PMCSR_DEVSLEEP);
> +
> + return 0;
> +}
> +
> +static int mpc86xx_suspend_valid(suspend_state_t state)
> +{
> + if (state == PM_SUSPEND_STANDBY)
> + return 1;
> + return 0;
> +}
> +
> +static struct platform_suspend_ops mpc86xx_suspend_ops = {
> + .valid = mpc86xx_suspend_valid,
> + .enter = mpc86xx_suspend_enter,
> +};
> +
> +static int __init mpc86xx_pmc_init(void)
> +{
> + void __iomem *guts;
> + struct device_node *np;
> +
> + np = of_find_compatible_node(NULL, NULL, "fsl,mpc8610-guts");
> + if (!np) {
> + np = of_find_compatible_node(NULL, NULL, "fsl,mpc8641-guts");
> + if (!np)
> + return -ENODEV;
> + }
> +
> + guts = of_iomap(np, 0);
> + of_node_put(np);
> + if (!guts)
> + return -ENOMEM;
> +
> + pmc_regs_86xx = guts + 0x70;
> +
> + suspend_set_ops(&mpc86xx_suspend_ops);
> + return 0;
> +}
> +module_init(mpc86xx_pmc_init);
> --
> 1.5.5.1
--
Anton Vorontsov
email: [EMAIL PROTECTED]
irc://irc.freenode.net/bd2
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