diff options
| author | Thierry Reding <treding@nvidia.com> | 2018-09-21 12:08:56 +0200 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2018-10-10 16:47:22 +0200 |
| commit | 00cba11fab58407a0017fc55476ea764161c5f07 (patch) | |
| tree | 83d2425a9d8bc79d6ccf2e23dab3ff26db346a60 /drivers/firmware | |
| parent | Linux 4.19-rc1 (diff) | |
| download | linux-00cba11fab58407a0017fc55476ea764161c5f07.tar.xz linux-00cba11fab58407a0017fc55476ea764161c5f07.zip | |
firmware: tegra: bpmp: Implement suspend/resume support
When returning from a system sleep state, the BPMP driver needs to
reinitialize the IVC channels used to communicate with the BPMP to
restore proper functionality.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/firmware')
| -rw-r--r-- | drivers/firmware/tegra/bpmp.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/firmware/tegra/bpmp.c b/drivers/firmware/tegra/bpmp.c index 14a456afa379..a3d5b518c10e 100644 --- a/drivers/firmware/tegra/bpmp.c +++ b/drivers/firmware/tegra/bpmp.c @@ -18,6 +18,7 @@ #include <linux/of_address.h> #include <linux/of_device.h> #include <linux/platform_device.h> +#include <linux/pm.h> #include <linux/semaphore.h> #include <linux/sched/clock.h> @@ -843,6 +844,23 @@ free_tx: return err; } +static int __maybe_unused tegra_bpmp_resume(struct device *dev) +{ + struct tegra_bpmp *bpmp = dev_get_drvdata(dev); + unsigned int i; + + /* reset message channels */ + tegra_bpmp_channel_reset(bpmp->tx_channel); + tegra_bpmp_channel_reset(bpmp->rx_channel); + + for (i = 0; i < bpmp->threaded.count; i++) + tegra_bpmp_channel_reset(&bpmp->threaded_channels[i]); + + return 0; +} + +static SIMPLE_DEV_PM_OPS(tegra_bpmp_pm_ops, NULL, tegra_bpmp_resume); + static const struct tegra_bpmp_soc tegra186_soc = { .channels = { .cpu_tx = { @@ -871,6 +889,7 @@ static struct platform_driver tegra_bpmp_driver = { .driver = { .name = "tegra-bpmp", .of_match_table = tegra_bpmp_match, + .pm = &tegra_bpmp_pm_ops, }, .probe = tegra_bpmp_probe, }; |