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authorThierry Reding <treding@nvidia.com>2018-11-28 10:54:14 +0100
committerJassi Brar <jaswinder.singh@linaro.org>2018-12-22 05:31:26 +0100
commit9a63f0f4059955210ae74c745513332a568e9738 (patch)
tree16e1998b2b6590961e4b2ef4b233392f36e08c51 /drivers/mailbox
parentmailbox: tegra-hsp: Add support for shared mailboxes (diff)
downloadlinux-9a63f0f4059955210ae74c745513332a568e9738.tar.xz
linux-9a63f0f4059955210ae74c745513332a568e9738.zip
mailbox: tegra-hsp: Add suspend/resume support
Upon resuming from a system sleep state, the interrupts for all active shared mailboxes need to be reenabled, otherwise they will not work. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Diffstat (limited to 'drivers/mailbox')
-rw-r--r--drivers/mailbox/tegra-hsp.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/mailbox/tegra-hsp.c b/drivers/mailbox/tegra-hsp.c
index a4ec18d76cba..07d1fbff3642 100644
--- a/drivers/mailbox/tegra-hsp.c
+++ b/drivers/mailbox/tegra-hsp.c
@@ -18,6 +18,7 @@
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
+#include <linux/pm.h>
#include <linux/slab.h>
#include <dt-bindings/mailbox/tegra186-hsp.h>
@@ -823,6 +824,23 @@ static int tegra_hsp_remove(struct platform_device *pdev)
return 0;
}
+static int tegra_hsp_resume(struct device *dev)
+{
+ struct tegra_hsp *hsp = dev_get_drvdata(dev);
+ unsigned int i;
+
+ for (i = 0; i < hsp->num_sm; i++) {
+ struct tegra_hsp_mailbox *mb = &hsp->mailboxes[i];
+
+ if (mb->channel.chan->cl)
+ tegra_hsp_mailbox_startup(mb->channel.chan);
+ }
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(tegra_hsp_pm_ops, NULL, tegra_hsp_resume);
+
static const struct tegra_hsp_db_map tegra186_hsp_db_map[] = {
{ "ccplex", TEGRA_HSP_DB_MASTER_CCPLEX, HSP_DB_CCPLEX, },
{ "bpmp", TEGRA_HSP_DB_MASTER_BPMP, HSP_DB_BPMP, },
@@ -849,6 +867,7 @@ static struct platform_driver tegra_hsp_driver = {
.driver = {
.name = "tegra-hsp",
.of_match_table = tegra_hsp_match,
+ .pm = &tegra_hsp_pm_ops,
},
.probe = tegra_hsp_probe,
.remove = tegra_hsp_remove,