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mtd: spi-nor: fsl-qspi: support deep sleep mode for imx6 sx chip 

i.mx6 sx support turn off fastmix and megamix power.
qpsi controller can be turned off and all status lost when suspend/resume.
add suspend/resume functions and reset qspi controller when resume.

Signed-off-by: Allen Xu <b45815@freescale.com>
Signed-off-by: Frank Li <Frank.Li@freescale.com>
Acked-by: Huang Shijie <shijie.huang@intel.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
This commit is contained in:
Allen Xu 2015-01-13 04:56:40 +08:00 committed by Brian Norris
parent 7c272ac5ee
commit 45c6a0caeb
1 changed files with 18 additions and 0 deletions
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18
drivers/mtd/spi-nor/fsl-quadspi.c
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@ -972,6 +972,22 @@ static int fsl_qspi_remove(struct platform_device *pdev)
return 0;
}
static int fsl_qspi_suspend(struct platform_device *pdev, pm_message_t state)
{
return 0;
}
static int fsl_qspi_resume(struct platform_device *pdev)
{
struct fsl_qspi *q = platform_get_drvdata(pdev);
fsl_qspi_nor_setup(q);
fsl_qspi_set_map_addr(q);
fsl_qspi_nor_setup_last(q);
return 0;
}
static struct platform_driver fsl_qspi_driver = {
.driver = {
.name = "fsl-quadspi",
@ -980,6 +996,8 @@ static struct platform_driver fsl_qspi_driver = {
},
.probe = fsl_qspi_probe,
.remove = fsl_qspi_remove,
.suspend = fsl_qspi_suspend,
.resume = fsl_qspi_resume,
};
module_platform_driver(fsl_qspi_driver);