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Commit 45c6a0ca authored by Allen Xu's avatar Allen Xu Committed by Brian Norris
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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: default avatarAllen Xu <b45815@freescale.com>
Signed-off-by: default avatarFrank Li <Frank.Li@freescale.com>
Acked-by: default avatarHuang Shijie <shijie.huang@intel.com>
Signed-off-by: default avatarBrian Norris <computersforpeace@gmail.com>
parent 7c272ac5

drivers/mtd/spi-nor/fsl-quadspi.c

+18 −0
Original line number Diff line number Diff line
@@ -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);