[PATCH 5/9] mailbox: tegra-hsp: Add suspend/resume support
From: Thierry Reding <hidden>
Date: 2018-10-26 11:17:26
Also in:
linux-devicetree, linux-serial, linux-tegra, lkml
Subsystem:
mailbox api, the rest · Maintainers:
Jassi Brar, Linus Torvalds
From: Thierry Reding <redacted> 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 <redacted> --- drivers/mailbox/tegra-hsp.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+)
diff --git a/drivers/mailbox/tegra-hsp.c b/drivers/mailbox/tegra-hsp.c
index d070c8e38375..043f7173af8f 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>
@@ -802,6 +803,23 @@ 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, },
@@ -821,6 +839,7 @@ 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,
--
2.19.1