On R-Car Gen 2, the SDHI registers cannot be accessed while the SDHI
module clock is disabled. Doing so will cause a lock-up.
When suspending, enable the module clock before disabling the SDHI
interrupts, and disable the clock again afterwards.
This fixes suspend and resume on r8a7791/koelsch.
Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
---
drivers/mmc/host/tmio_mmc_pio.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index faf0924e71cb..83192420a7e3 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -1147,8 +1147,18 @@ int tmio_mmc_host_suspend(struct device *dev)
{
struct mmc_host *mmc = dev_get_drvdata(dev);
struct tmio_mmc_host *host = mmc_priv(mmc);
+ struct tmio_mmc_data *pdata = host->pdata;
+
+ if (pdata->clk_enable) {
+ unsigned int f;
+ pdata->clk_enable(host->pdev, &f);
+ }
tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_ALL);
+
+ if (pdata->clk_disable)
+ pdata->clk_disable(host->pdev);
+
return 0;
}
EXPORT_SYMBOL(tmio_mmc_host_suspend);
--
1.9.1
--
To unsubscribe from this list: send the line "unsubscribe linux-mmc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
