diff options
| -rw-r--r-- | drivers/mtd/nand/gpmi-nand/gpmi-nand.c | 47 |
1 files changed, 46 insertions, 1 deletions
diff --git a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c index 235ddcb58f39..9c311b06018b 100644 --- a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c +++ b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c @@ -1,7 +1,7 @@ /* * Freescale GPMI NAND Flash Driver * - * Copyright (C) 2010-2011 Freescale Semiconductor, Inc. + * Copyright (C) 2010-2015 Freescale Semiconductor, Inc. * Copyright (C) 2008 Embedded Alley Solutions, Inc. * * This program is free software; you can redistribute it and/or modify @@ -2033,9 +2033,54 @@ static int gpmi_nand_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM_SLEEP +static int gpmi_pm_suspend(struct device *dev) +{ + struct gpmi_nand_data *this = dev_get_drvdata(dev); + + release_dma_channels(this); + return 0; +} + +static int gpmi_pm_resume(struct device *dev) +{ + struct gpmi_nand_data *this = dev_get_drvdata(dev); + int ret; + + ret = acquire_dma_channels(this); + if (ret < 0) + return ret; + + /* re-init the GPMI registers */ + this->flags &= ~GPMI_TIMING_INIT_OK; + ret = gpmi_init(this); + if (ret) { + dev_err(this->dev, "Error setting GPMI : %d\n", ret); + return ret; + } + + /* re-init the BCH registers */ + ret = bch_set_geometry(this); + if (ret) { + dev_err(this->dev, "Error setting BCH : %d\n", ret); + return ret; + } + + /* re-init others */ + gpmi_extra_init(this); + + return 0; +} +#endif /* CONFIG_PM_SLEEP */ + +static const struct dev_pm_ops gpmi_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(gpmi_pm_suspend, gpmi_pm_resume) +}; + static struct platform_driver gpmi_nand_driver = { .driver = { .name = "gpmi-nand", + .pm = &gpmi_pm_ops, .of_match_table = gpmi_nand_id_table, }, .probe = gpmi_nand_probe, |
