thermal: Kernel driver for OC event handling

Why?
In case of an OC(Over Current) event in Tegra SOC,
BPMP gets an interrupt indicating the same. However,
there is no indication to ccplex and userspace about
the same. This driver provides the interface between
BPMP OC implementation and userspace.

How?
Once there is an EDP OC interrupt to BPMP, BPMP writes
to a Shared mailbox register dedicated for BPMP and CCPLEX
communication for EDP OC. Once the interrupt is received,
Kernel reads the OC status registers to realize the state
of the EDP OC HW. The kernel driver provides interfaces
for Userspace to poll for the status/interrupts count.

Bug 1688327

Change-Id: Iec57849b2be8343bc9d8c617bffd44ab63c8fa9d
Signed-off-by: Mantravadi Karthik <mkarthik@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2319540
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: automaticguardword <automaticguardword@nvidia.com>
Reviewed-by: Bibek Basu <bbasu@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
GVS: Gerrit_Virtual_Submit

1 files changed, 65 insertions, 0 deletions

diff --git a/include/dt-bindings/thermal/tegra194-soctherm.h b/include/dt-bindings/thermal/tegra194-soctherm.h
new file mode 100644
index 000000000..5476bae4d
--- /dev/null
+++ b/include/dt-bindings/thermal/tegra194-soctherm.h
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2020, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+
+#ifndef BPMP_ABI_MACH_T194_SOCTHERM_H
+#define BPMP_ABI_MACH_T194_SOCTHERM_H
+
+/**
+ * @file
+ * @defgroup bpmp_soctherm_ids Soctherm ID's
+ * @{
+ *   @defgroup bpmp_soctherm_throt_ids Throttle Identifiers
+ *   @defgroup bpmp_soctherm_edp_oc_ids EDP/OC Identifiers
+ *   @defgroup bpmp_soctherm_throt_modes Throttle Modes
+ * @}
+ */
+
+/**
+ * @addtogroup bpmp_soctherm_throt_ids
+ * @{
+ */
+#define SOCTHERM_THROT_VEC_LITE         0U
+#define SOCTHERM_THROT_VEC_HEAVY        1U
+#define SOCTHERM_THROT_VEC_OC1          2U
+#define SOCTHERM_THROT_VEC_OC2          3U
+#define SOCTHERM_THROT_VEC_OC3          4U
+#define SOCTHERM_THROT_VEC_OC4          5U
+#define SOCTHERM_THROT_VEC_OC5          6U
+#define SOCTHERM_THROT_VEC_OC6          7U
+#define SOCTHERM_THROT_VEC_INVALID      8U
+/** @} */
+
+/**
+ * @addtogroup bpmp_soctherm_edp_oc_ids
+ * @{
+ */
+#define SOCTHERM_EDP_OC1        0U
+#define SOCTHERM_EDP_OC2        1U
+#define SOCTHERM_EDP_OC3        2U
+#define SOCTHERM_EDP_OC4        3U
+#define SOCTHERM_EDP_OC5        4U
+#define SOCTHERM_EDP_OC6        5U
+#define SOCTHERM_EDP_OC_INVALID 6U
+/** @} */
+
+/**
+ * @addtogroup bpmp_soctherm_throt_modes
+ */
+#define SOCTHERM_EDP_OC_MODE_BRIEF      2U
+
+#endif