Merge "firmware: qcom: Register call back functions for hibernation" (bac01ea4) · Commits · e / devices / android_kernel_xiaomi_nabu

drivers/firmware/qcom/tz_log.c

+35 −2

Original line number	Diff line number	Diff line
		/* Copyright (c) 2011-2019, The Linux Foundation. All rights reserved.
		/* Copyright (c) 2011-2020, The Linux Foundation. All rights reserved.
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License version 2 and
		@@ -25,6 +25,7 @@
		#include <linux/of.h>
		#include <linux/dma-buf.h>
		#include <linux/ion_kernel.h>
		#include <linux/pm.h>

		#include <soc/qcom/scm.h>
		#include <soc/qcom/qseecomi.h>
		@@ -1130,7 +1131,6 @@ static int tz_log_probe(struct platform_device *pdev)
		return -ENXIO;
		}


		static int tz_log_remove(struct platform_device *pdev)
		{
		kzfree(tzdbg.diag_buf);
		@@ -1141,6 +1141,38 @@ static int tz_log_remove(struct platform_device *pdev)
		return 0;
		}

		#ifdef CONFIG_PM
		static int tz_log_freeze(struct device *dev)
		{
		dma_free_coherent(dev, QSEE_LOG_BUF_SIZE, (void *)g_qsee_log,
		coh_pmem);

		return 0;
		}

		static int tz_log_restore(struct device *dev)
		{
		/* Register the log bugger at TZ during hibernation resume.
		* After hibernation the log buffer is with HLOS as TZ encountered
		* a coldboot sequence.
		*/
		tzdbg_register_qsee_log_buf(to_platform_device(dev));

		return 0;
		}

		static const struct dev_pm_ops tz_log_pmops = {
		.freeze = tz_log_freeze,
		.restore = tz_log_restore,
		.thaw = tz_log_restore,
		};

		#define TZ_LOG_PMOPS (&tz_log_pmops)

		#else
		#define TZ_LOG_PMOPS NULL
		#endif

		static const struct of_device_id tzlog_match[] = {
		{ .compatible = "qcom,tz-log",
		},
		@@ -1155,6 +1187,7 @@ static struct platform_driver tz_log_driver = {
		.owner = THIS_MODULE,
		.of_match_table = tzlog_match,
		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
		.pm = TZ_LOG_PMOPS,
		},
		};