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powerpc/83xx/suspend: Save and restore SICRL, SICRH and SCCR

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We need to save SICRL, SICRH and SCCR registers on suspend, and restore
them on resume. Otherwise, we lose IO and clocks setup on MPC8315E-RDB
boards when ULPI USB PHY is used (non-POR setup).

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Acked-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Anton Vorontsov 2009-12-10 21:00:56 +03:00 committed by Kumar Gala
parent f25c525c14
commit 87faaabb09
1 changed files with 48 additions and 0 deletions
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48
arch/powerpc/platforms/83xx/suspend.c
View file

@ -32,6 +32,7 @@
#define PMCCR1_NEXT_STATE 0x0C /* Next state for power management */
#define PMCCR1_NEXT_STATE_SHIFT 2
#define PMCCR1_CURR_STATE 0x03 /* Current state for power management*/
#define IMMR_SYSCR_OFFSET 0x100
#define IMMR_RCW_OFFSET 0x900
#define RCW_PCI_HOST 0x80000000
@ -78,6 +79,22 @@ struct mpc83xx_clock {
u32 sccr;
};
struct mpc83xx_syscr {
__be32 sgprl;
__be32 sgprh;
__be32 spridr;
__be32 :32;
__be32 spcr;
__be32 sicrl;
__be32 sicrh;
};
struct mpc83xx_saved {
u32 sicrl;
u32 sicrh;
u32 sccr;
};
struct pmc_type {
int has_deep_sleep;
};
@ -87,6 +104,8 @@ static int has_deep_sleep, deep_sleeping;
static int pmc_irq;
static struct mpc83xx_pmc __iomem *pmc_regs;
static struct mpc83xx_clock __iomem *clock_regs;
static struct mpc83xx_syscr __iomem *syscr_regs;
static struct mpc83xx_saved saved_regs;
static int is_pci_agent, wake_from_pci;
static phys_addr_t immrbase;
static int pci_pm_state;
@ -137,6 +156,20 @@ static irqreturn_t pmc_irq_handler(int irq, void *dev_id)
return ret;
}
static void mpc83xx_suspend_restore_regs(void)
{
out_be32(&syscr_regs->sicrl, saved_regs.sicrl);
out_be32(&syscr_regs->sicrh, saved_regs.sicrh);
out_be32(&clock_regs->sccr, saved_regs.sccr);
}
static void mpc83xx_suspend_save_regs(void)
{
saved_regs.sicrl = in_be32(&syscr_regs->sicrl);
saved_regs.sicrh = in_be32(&syscr_regs->sicrh);
saved_regs.sccr = in_be32(&clock_regs->sccr);
}
static int mpc83xx_suspend_enter(suspend_state_t state)
{
int ret = -EAGAIN;
@ -166,6 +199,8 @@ static int mpc83xx_suspend_enter(suspend_state_t state)
*/
if (deep_sleeping) {
mpc83xx_suspend_save_regs();
out_be32(&pmc_regs->mask, PMCER_ALL);
out_be32(&pmc_regs->config1,
@ -179,6 +214,8 @@ static int mpc83xx_suspend_enter(suspend_state_t state)
in_be32(&pmc_regs->config1) & ~PMCCR1_POWER_OFF);
out_be32(&pmc_regs->mask, PMCER_PMCI);
mpc83xx_suspend_restore_regs();
} else {
out_be32(&pmc_regs->mask, PMCER_PMCI);
@ -333,12 +370,23 @@ static int pmc_probe(struct of_device *ofdev,
goto out_pmc;
}
if (has_deep_sleep) {
syscr_regs = ioremap(immrbase + IMMR_SYSCR_OFFSET,
sizeof(*syscr_regs));
if (!syscr_regs) {
ret = -ENOMEM;
goto out_syscr;
}
}
if (is_pci_agent)
mpc83xx_set_agent();
suspend_set_ops(&mpc83xx_suspend_ops);
return 0;
out_syscr:
iounmap(clock_regs);
out_pmc:
iounmap(pmc_regs);
out: