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powerpc/fsl-lbc: Modify suspend/resume entry sequence

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Modify platform driver suspend/resume to syscore
suspend/resume. This is because p1022ds needs to use
localbus when entering the PCIE resume.

Signed-off-by: Raghav Dogra <raghav.dogra@nxp.com>
[scottwood: dropped makefile churn]
Signed-off-by: Scott Wood <oss@buserror.net>
This commit is contained in:
Raghav Dogra 2016-02-09 15:09:08 +05:30 committed by Scott Wood
parent 921fff351c
commit ac6082dd32
1 changed files with 38 additions and 11 deletions
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49
arch/powerpc/sysdev/fsl_lbc.c
View file

@ -27,6 +27,7 @@
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/mod_devicetable.h>
#include <linux/syscore_ops.h>
#include <asm/prom.h>
#include <asm/fsl_lbc.h>
@ -352,24 +353,42 @@ static int fsl_lbc_ctrl_probe(struct platform_device *dev)
#ifdef CONFIG_SUSPEND
/* save lbc registers */
static int fsl_lbc_suspend(struct platform_device *pdev, pm_message_t state)
static int fsl_lbc_syscore_suspend(void)
{
struct fsl_lbc_ctrl *ctrl = dev_get_drvdata(&pdev->dev);
struct fsl_lbc_regs __iomem *lbc = ctrl->regs;
struct fsl_lbc_ctrl *ctrl;
struct fsl_lbc_regs __iomem *lbc;
ctrl = fsl_lbc_ctrl_dev;
if (!ctrl)
goto out;
lbc = ctrl->regs;
if (!lbc)
goto out;
ctrl->saved_regs = kmalloc(sizeof(struct fsl_lbc_regs), GFP_KERNEL);
if (!ctrl->saved_regs)
return -ENOMEM;
_memcpy_fromio(ctrl->saved_regs, lbc, sizeof(struct fsl_lbc_regs));
out:
return 0;
}
/* restore lbc registers */
static int fsl_lbc_resume(struct platform_device *pdev)
static void fsl_lbc_syscore_resume(void)
{
struct fsl_lbc_ctrl *ctrl = dev_get_drvdata(&pdev->dev);
struct fsl_lbc_regs __iomem *lbc = ctrl->regs;
struct fsl_lbc_ctrl *ctrl;
struct fsl_lbc_regs __iomem *lbc;
ctrl = fsl_lbc_ctrl_dev;
if (!ctrl)
goto out;
lbc = ctrl->regs;
if (!lbc)
goto out;
if (ctrl->saved_regs) {
_memcpy_toio(lbc, ctrl->saved_regs,
@ -377,7 +396,9 @@ static int fsl_lbc_resume(struct platform_device *pdev)
kfree(ctrl->saved_regs);
ctrl->saved_regs = NULL;
}
return 0;
out:
return;
}
#endif /* CONFIG_SUSPEND */
@ -389,20 +410,26 @@ static const struct of_device_id fsl_lbc_match[] = {
{},
};
#ifdef CONFIG_SUSPEND
static struct syscore_ops lbc_syscore_pm_ops = {
.suspend = fsl_lbc_syscore_suspend,
.resume = fsl_lbc_syscore_resume,
};
#endif
static struct platform_driver fsl_lbc_ctrl_driver = {
.driver = {
.name = "fsl-lbc",
.of_match_table = fsl_lbc_match,
},
.probe = fsl_lbc_ctrl_probe,
#ifdef CONFIG_SUSPEND
.suspend = fsl_lbc_suspend,
.resume = fsl_lbc_resume,
#endif
};
static int __init fsl_lbc_init(void)
{
#ifdef CONFIG_SUSPEND
register_syscore_ops(&lbc_syscore_pm_ops);
#endif
return platform_driver_register(&fsl_lbc_ctrl_driver);
}
subsys_initcall(fsl_lbc_init);