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nvadsp: t264: Implement AON_CPU assert/deassert

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Implement CAR assert/deassert of AON_CPU so that
it is pulled into reset at os_suspend() call.

Bug 3916054

Change-Id: I6069c2f12b5809e6ec8db8f304f9e5bf65a0b636
Signed-off-by: Viswanath L <viswanathl@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-t264/+/3181031
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
Reviewed-by: Asha T <atalambedu@nvidia.com>
Reviewed-by: Dara Ramesh <dramesh@nvidia.com>
This commit is contained in:
Viswanath L
2024-07-24 12:49:38 +00:00
committed by Jon Hunter
parent a9663f6164
commit 4714f80198
1 changed files with 26 additions and 4 deletions
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30
drivers/platform/tegra/nvadsp/dev-t264-aon.c
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@@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0-only
// SPDX-FileCopyrightText: Copyright (c) 2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
#include <linux/reset.h>
#include "dev.h"
/* Defining offsets */
@@ -98,31 +99,46 @@ static int __set_boot_freqs_t264(struct nvadsp_drv_data *d)
static int __assert_t264_aon(struct nvadsp_drv_data *d)
{
struct platform_device *pdev = d->pdev;
struct device *dev = &pdev->dev;
void __iomem *cpu_config_base;
u32 cpu_config;
/* TBD: CPU assert */
int ret = 0;
/* Assert RUNSTALL */
cpu_config_base = d->base_regs[AO_MISC];
cpu_config = AO_MISC_CPU_SET_RUNSTALL_0;
writel(cpu_config, cpu_config_base + AO_MISC_CPU_RUNSTALL_0);
/* CAR assert */
ret = reset_control_assert(d->adspall_rst);
if (ret)
dev_err(dev, "failed to assert aon_cpu: %d\n", ret);
return 0;
}
static int __deassert_t264_aon(struct nvadsp_drv_data *d)
{
struct platform_device *pdev = d->pdev;
struct device *dev = &pdev->dev;
void __iomem *cpu_config_base;
u32 cpu_config;
int ret = 0;
/* TBD: CPU deassert */
/* CAR deassert */
ret = reset_control_deassert(d->adspall_rst);
if (ret) {
dev_err(dev, "failed to deassert aon_cpu: %d\n", ret);
goto end;
}
/* Lift RUNSTALL */
cpu_config_base = d->base_regs[AO_MISC];
cpu_config = AO_MISC_CPU_CLEAR_RUNSTALL_0;
writel(cpu_config, cpu_config_base + AO_MISC_CPU_RUNSTALL_0);
end:
return 0;
}
@@ -172,11 +188,11 @@ static bool __check_wfi_status_t264_aon(struct nvadsp_drv_data *d)
static int nvaon_dev_t264_init(struct platform_device *pdev)
{
struct nvadsp_drv_data *d = platform_get_drvdata(pdev);
struct device *dev = &pdev->dev;
int ret = 0;
d->assert_adsp = __assert_t264_aon;
d->deassert_adsp = __deassert_t264_aon;
d->adspall_rst = NULL; //TBD
d->set_boot_vec = __set_boot_vec_t264;
d->set_boot_freqs = __set_boot_freqs_t264;
@@ -185,6 +201,12 @@ static int nvaon_dev_t264_init(struct platform_device *pdev)
d->check_wfi_status = __check_wfi_status_t264_aon;
d->dump_core_state = __dump_core_state_t264_aon;
d->adspall_rst = devm_reset_control_get(dev, "aon_cpu");
if (IS_ERR(d->adspall_rst)) {
dev_err(dev, "cannot get aon_cpu reset\n");
ret = PTR_ERR(d->adspall_rst);
}
return ret;
}