mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
130 lines
2.9 KiB
130 lines
2.9 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* Copyright (C) 2014 NVIDIA CORPORATION. All rights reserved. |
|
*/ |
|
|
|
#define dev_fmt(fmt) "tegra-soc: " fmt |
|
|
|
#include <linux/clk.h> |
|
#include <linux/device.h> |
|
#include <linux/export.h> |
|
#include <linux/of.h> |
|
#include <linux/pm_opp.h> |
|
|
|
#include <soc/tegra/common.h> |
|
#include <soc/tegra/fuse.h> |
|
|
|
static const struct of_device_id tegra_machine_match[] = { |
|
{ .compatible = "nvidia,tegra20", }, |
|
{ .compatible = "nvidia,tegra30", }, |
|
{ .compatible = "nvidia,tegra114", }, |
|
{ .compatible = "nvidia,tegra124", }, |
|
{ .compatible = "nvidia,tegra132", }, |
|
{ .compatible = "nvidia,tegra210", }, |
|
{ } |
|
}; |
|
|
|
bool soc_is_tegra(void) |
|
{ |
|
const struct of_device_id *match; |
|
struct device_node *root; |
|
|
|
root = of_find_node_by_path("/"); |
|
if (!root) |
|
return false; |
|
|
|
match = of_match_node(tegra_machine_match, root); |
|
of_node_put(root); |
|
|
|
return match != NULL; |
|
} |
|
|
|
static int tegra_core_dev_init_opp_state(struct device *dev) |
|
{ |
|
unsigned long rate; |
|
struct clk *clk; |
|
int err; |
|
|
|
clk = devm_clk_get(dev, NULL); |
|
if (IS_ERR(clk)) { |
|
dev_err(dev, "failed to get clk: %pe\n", clk); |
|
return PTR_ERR(clk); |
|
} |
|
|
|
rate = clk_get_rate(clk); |
|
if (!rate) { |
|
dev_err(dev, "failed to get clk rate\n"); |
|
return -EINVAL; |
|
} |
|
|
|
/* first dummy rate-setting initializes voltage vote */ |
|
err = dev_pm_opp_set_rate(dev, rate); |
|
if (err) { |
|
dev_err(dev, "failed to initialize OPP clock: %d\n", err); |
|
return err; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* devm_tegra_core_dev_init_opp_table() - initialize OPP table |
|
* @dev: device for which OPP table is initialized |
|
* @params: pointer to the OPP table configuration |
|
* |
|
* This function will initialize OPP table and sync OPP state of a Tegra SoC |
|
* core device. |
|
* |
|
* Return: 0 on success or errorno. |
|
*/ |
|
int devm_tegra_core_dev_init_opp_table(struct device *dev, |
|
struct tegra_core_opp_params *params) |
|
{ |
|
u32 hw_version; |
|
int err; |
|
|
|
err = devm_pm_opp_set_clkname(dev, NULL); |
|
if (err) { |
|
dev_err(dev, "failed to set OPP clk: %d\n", err); |
|
return err; |
|
} |
|
|
|
/* Tegra114+ doesn't support OPP yet */ |
|
if (!of_machine_is_compatible("nvidia,tegra20") && |
|
!of_machine_is_compatible("nvidia,tegra30")) |
|
return -ENODEV; |
|
|
|
if (of_machine_is_compatible("nvidia,tegra20")) |
|
hw_version = BIT(tegra_sku_info.soc_process_id); |
|
else |
|
hw_version = BIT(tegra_sku_info.soc_speedo_id); |
|
|
|
err = devm_pm_opp_set_supported_hw(dev, &hw_version, 1); |
|
if (err) { |
|
dev_err(dev, "failed to set OPP supported HW: %d\n", err); |
|
return err; |
|
} |
|
|
|
/* |
|
* Older device-trees have an empty OPP table, we will get |
|
* -ENODEV from devm_pm_opp_of_add_table() in this case. |
|
*/ |
|
err = devm_pm_opp_of_add_table(dev); |
|
if (err) { |
|
if (err == -ENODEV) |
|
dev_err_once(dev, "OPP table not found, please update device-tree\n"); |
|
else |
|
dev_err(dev, "failed to add OPP table: %d\n", err); |
|
|
|
return err; |
|
} |
|
|
|
if (params->init_state) { |
|
err = tegra_core_dev_init_opp_state(dev); |
|
if (err) |
|
return err; |
|
} |
|
|
|
return 0; |
|
} |
|
EXPORT_SYMBOL_GPL(devm_tegra_core_dev_init_opp_table);
|
|
|