From 45c6a0caeb2bde9e043bcd833af322db57a37498 Mon Sep 17 00:00:00 2001 From: Allen Xu Date: Tue, 13 Jan 2015 04:56:40 +0800 Subject: [PATCH] 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 Signed-off-by: Frank Li Acked-by: Huang Shijie Signed-off-by: Brian Norris --- drivers/mtd/spi-nor/fsl-quadspi.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/drivers/mtd/spi-nor/fsl-quadspi.c b/drivers/mtd/spi-nor/fsl-quadspi.c index 39763b94f67d..9d6080079a45 100644 --- a/drivers/mtd/spi-nor/fsl-quadspi.c +++ b/drivers/mtd/spi-nor/fsl-quadspi.c @@ -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); -- 2.34.1