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| author | Arnd Bergmann <arnd@arndb.de> | 2018-10-11 15:25:42 +0200 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2018-10-11 15:26:18 +0200 |
| commit | c1a92909dbc2090753ff6224971d9b8ae5f93c97 (patch) | |
| tree | 2e1de7e7e979f39fbcdf4c1b8adce245dd0ee7cf | |
| parent | e4c080a10a23577303c0ef05c37c18661f758f34 (diff) | |
| parent | 00cba11fab58407a0017fc55476ea764161c5f07 (diff) | |
| download | linux-c1a92909dbc2090753ff6224971d9b8ae5f93c97.tar.bz2 | |
Merge tag 'tegra-for-4.20-firmware-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into next/drivers
firmware: tegra: Changes for v4.20-rc1
This contains a fix for suspend/resume support for the BPMP found on
Tegra186 and Tegra194.
* tag 'tegra-for-4.20-firmware-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
firmware: tegra: bpmp: Implement suspend/resume support
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
| -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, }; |