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| author | Domen Puncer <domen.puncer@telargo.com> | 2007-05-07 01:38:52 +1000 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2007-05-07 20:31:15 +1000 |
| commit | 2e1ee1f76684c5d4dd8e5a08cbf22d57f88769ed (patch) | |
| tree | 0c69d52b8fb2cf82f257944d182ce1f8973ab9f9 /arch/powerpc/platforms/52xx/lite5200.c | |
| parent | a3481197783c187707090504062488862768260a (diff) | |
| download | op-kernel-dev-2e1ee1f76684c5d4dd8e5a08cbf22d57f88769ed.zip op-kernel-dev-2e1ee1f76684c5d4dd8e5a08cbf22d57f88769ed.tar.gz | |
[POWERPC] mpc52xx suspend to deep-sleep
Implement deep-sleep on MPC52xx.
SDRAM is put into self-refresh with help of SRAM code
(alternatives would be code in FLASH, I-cache).
Interrupt code must also not be in SDRAM, so put it
in I-cache.
MPC52xx core is static, so contents will remain intact even
with clocks turned off.
Signed-off-by: Domen Puncer <domen.puncer@telargo.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/platforms/52xx/lite5200.c')
| -rw-r--r-- | arch/powerpc/platforms/52xx/lite5200.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/52xx/lite5200.c b/arch/powerpc/platforms/52xx/lite5200.c index 8e2646a..1cfc00d 100644 --- a/arch/powerpc/platforms/52xx/lite5200.c +++ b/arch/powerpc/platforms/52xx/lite5200.c @@ -85,6 +85,28 @@ error: iounmap(gpio); } +#ifdef CONFIG_PM +static u32 descr_a; +static void lite5200_suspend_prepare(void __iomem *mbar) +{ + u8 pin = 1; /* GPIO_WKUP_1 (GPIO_PSC2_4) */ + u8 level = 0; /* wakeup on low level */ + mpc52xx_set_wakeup_gpio(pin, level); + + /* + * power down usb port + * this needs to be called before of-ohci suspend code + */ + descr_a = in_be32(mbar + 0x1048); + out_be32(mbar + 0x1048, (descr_a & ~0x200) | 0x100); +} + +static void lite5200_resume_finish(void __iomem *mbar) +{ + out_be32(mbar + 0x1048, descr_a); +} +#endif + static void __init lite5200_setup_arch(void) { struct device_node *np; @@ -107,6 +129,12 @@ static void __init lite5200_setup_arch(void) mpc52xx_setup_cpu(); /* Generic */ lite5200_setup_cpu(); /* Platorm specific */ +#ifdef CONFIG_PM + mpc52xx_suspend.board_suspend_prepare = lite5200_suspend_prepare; + mpc52xx_suspend.board_resume_finish = lite5200_resume_finish; + mpc52xx_pm_init(); +#endif + #ifdef CONFIG_PCI np = of_find_node_by_type(NULL, "pci"); if (np) { |
