platform: tegra: check clock enabled before register access

Adding check for clock enabled by calling __clk_is_enabled()
before accessing registers for CV-NOC.
This was causing additional CBB errors on reading error valid
register of CV-NOC while reporting original SError cause due
to any illegal access in other cluster NOC's.

Bug 200340783

Change-Id: I819f99264c4e934e6ae0facf39d35fed15e79957
Signed-off-by: Sumit Gupta <sumitg@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1794891
GVS: Gerrit_Virtual_Submit
Reviewed-by: Puneet Saxena <puneets@nvidia.com>
Reviewed-by: Alexander Van Brunt <avanbrunt@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

2 files changed, 3 insertions, 0 deletions

diff --git a/include/linux/platform/tegra/tegra19x_cbb.h b/include/linux/platform/tegra/tegra19x_cbb.h
index c3717fcff..874a082de 100644
--- a/include/linux/platform/tegra/tegra19x_cbb.h
+++ b/include/linux/platform/tegra/tegra19x_cbb.h
@@ -18,6 +18,7 @@ extern int nvcvnas_idle(void);
 extern int is_nvcvnas_probed(void);
 extern int nvcvnas_busy_no_rpm(void);
 extern int nvcvnas_idle_no_rpm(void);
+extern int is_nvcvnas_clk_enabled(void);
 
 static char *t194_master_id[] = {
         "CCPLEX",                               /* 0x1 */
diff --git a/include/linux/platform/tegra/tegra_cbb.h b/include/linux/platform/tegra/tegra_cbb.h
index 2789bce60..e897f8aac 100644
--- a/include/linux/platform/tegra/tegra_cbb.h
+++ b/include/linux/platform/tegra/tegra_cbb.h
@@ -140,6 +140,7 @@ struct tegra_cbb_errlog_record {
         int             apb_bridge_cnt;
         bool            is_clk_rst;
         int             (*is_cluster_probed)(void);
+        int             (*is_clk_enabled)(void);
         int             (*tegra_noc_en_clk_rpm)(void);
         int             (*tegra_noc_dis_clk_rpm)(void);
         int             (*tegra_noc_en_clk_no_rpm)(void);
@@ -163,6 +164,7 @@ struct tegra_cbb_noc_data {
         bool            is_ax2apb_bridge_connected;
         bool            is_clk_rst;
         int             (*is_cluster_probed)(void);
+        int             (*is_clk_enabled)(void);
         int             (*tegra_noc_en_clk_rpm)(void);
         int             (*tegra_noc_dis_clk_rpm)(void);
         int             (*tegra_noc_en_clk_no_rpm)(void);