xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

firmware: tegra: Add BPMP debugfs support

Browse Source 
Tegra power management firmware running on the co-processor (BPMP)
implements a simple pseudo file system akin to debugfs. The file
system can be used for debugging purposes to examine and change the
status of selected resources controlled by the firmware (such as
clocks, resets, voltages, powergates, ...).

Add support to "mirror" the firmware's file system to debugfs. At
boot, query firmware for a list of all possible files and create
corresponding debugfs entries. Read/write of individual files is
implemented by sending a Message ReQuest (MRQ) that passes the full
file path name and data to firmware via DRAM.

Signed-off-by: Timo Alho <talho@nvidia.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Timo Alho
2017-10-03 09:12:13 +03:00
committed by Thierry Reding
parent 80d47a91e5
commit f2381f6522
4 changed files with 465 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
include/soc/tegra/bpmp.h
View File

@@ -94,6 +94,10 @@ struct tegra_bpmp {
struct reset_controller_dev rstc;
struct genpd_onecell_data genpd;
#ifdef CONFIG_DEBUG_FS
struct dentry *debugfs_mirror;
#endif
};
struct tegra_bpmp_message {
@@ -189,4 +193,14 @@ static inline int tegra_bpmp_init_powergates(struct tegra_bpmp *bpmp)
}
#endif
#if IS_ENABLED(CONFIG_DEBUG_FS)
int tegra_bpmp_init_debugfs(struct tegra_bpmp *bpmp);
#else
static inline int tegra_bpmp_init_debugfs(struct tegra_bpmp *bpmp)
{
return 0;
}
#endif
#endif /* __SOC_TEGRA_BPMP_H */