mmc: sdhci-brcmstb: Add shutdown callback

Shutdown controller and disable it's clocks to insure max power
savings in S5 on systems that leave power on.

Signed-off-by: Al Cooper <alcooperx@gmail.com>
Link: https://lore.kernel.org/r/20200113210706.11972-5-alcooperx@gmail.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/drivers/mmc/host/sdhci-brcmstb.c b/drivers/mmc/host/sdhci-brcmstb.c
index 218176b79b6aed5789f3afb5477ce80e3b0110bf..7ea426ba5cbc48a3b62cbfc073d4e59af73d0754 100644 (file)
--- a/drivers/mmc/host/sdhci-brcmstb.c
+++ b/drivers/mmc/host/sdhci-brcmstb.c
@@ -161,6 +161,15 @@ err_clk:
        return res;
 }
 
+static void sdhci_brcmstb_shutdown(struct platform_device *pdev)
+{
+       int ret;
+
+       ret = sdhci_pltfm_unregister(pdev);
+       if (ret)
+               dev_err(&pdev->dev, "failed to shutdown\n");
+}
+
 MODULE_DEVICE_TABLE(of, sdhci_brcm_of_match);
 
 static struct platform_driver sdhci_brcmstb_driver = {
@@ -171,6 +180,7 @@ static struct platform_driver sdhci_brcmstb_driver = {
        },
        .probe          = sdhci_brcmstb_probe,
        .remove         = sdhci_pltfm_unregister,
+       .shutdown       = sdhci_brcmstb_shutdown,
 };
 
 module_platform_driver(sdhci_brcmstb_driver);