mtd: spi-nor: atmel-quadspi: add suspend/resume hooks

Implement suspend/resume hooks.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>

diff --git a/drivers/mtd/spi-nor/atmel-quadspi.c b/drivers/mtd/spi-nor/atmel-quadspi.c
index 6c5708b..ceaaef4 100644 (file)
--- a/drivers/mtd/spi-nor/atmel-quadspi.c
+++ b/drivers/mtd/spi-nor/atmel-quadspi.c
@@ -737,6 +737,26 @@ static int atmel_qspi_remove(struct platform_device *pdev)
        return 0;
 }
 
+static int __maybe_unused atmel_qspi_suspend(struct device *dev)
+{
+       struct atmel_qspi *aq = dev_get_drvdata(dev);
+
+       clk_disable_unprepare(aq->clk);
+
+       return 0;
+}
+
+static int __maybe_unused atmel_qspi_resume(struct device *dev)
+{
+       struct atmel_qspi *aq = dev_get_drvdata(dev);
+
+       clk_prepare_enable(aq->clk);
+
+       return atmel_qspi_init(aq);
+}
+
+static SIMPLE_DEV_PM_OPS(atmel_qspi_pm_ops, atmel_qspi_suspend,
+                        atmel_qspi_resume);
 
 static const struct of_device_id atmel_qspi_dt_ids[] = {
        { .compatible = "atmel,sama5d2-qspi" },
@@ -749,6 +769,7 @@ static struct platform_driver atmel_qspi_driver = {
        .driver = {
                .name   = "atmel_qspi",
                .of_match_table = atmel_qspi_dt_ids,
+               .pm     = &atmel_qspi_pm_ops,
        },
        .probe          = atmel_qspi_probe,
        .remove         = atmel_qspi_remove,