path: root/drivers/thermal/mediatek/lvts_thermal.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2023 MediaTek Inc.
 * Author: Balsam CHIHI <bchihi@baylibre.com>
 */

#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/delay.h>
#include <linux/debugfs.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/iopoll.h>
#include <linux/kernel.h>
#include <linux/nvmem-consumer.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/reset.h>
#include <linux/thermal.h>
#include <dt-bindings/thermal/mediatek,lvts-thermal.h>

#define LVTS_MONCTL0(__base)	(__base + 0x0000)
#define LVTS_MONCTL1(__base)	(__base + 0x0004)
#define LVTS_MONCTL2(__base)	(__base + 0x0008)
#define LVTS_MONINT(__base)		(__base + 0x000C)
#define LVTS_MONINTSTS(__base)	(__base + 0x0010)
#define LVTS_MONIDET0(__base)	(__base + 0x0014)
#define LVTS_MONIDET1(__base)	(__base + 0x0018)
#define LVTS_MONIDET2(__base)	(__base + 0x001C)
#define LVTS_MONIDET3(__base)	(__base + 0x0020)
#define LVTS_H2NTHRE(__base)	(__base + 0x0024)
#define LVTS_HTHRE(__base)		(__base + 0x0028)
#define LVTS_OFFSETH(__base)	(__base + 0x0030)
#define LVTS_OFFSETL(__base)	(__base + 0x0034)
#define LVTS_MSRCTL0(__base)	(__base + 0x0038)
#define LVTS_MSRCTL1(__base)	(__base + 0x003C)
#define LVTS_TSSEL(__base)		(__base + 0x0040)
#define LVTS_CALSCALE(__base)	(__base + 0x0048)
#define LVTS_ID(__base)			(__base + 0x004C)
#define LVTS_CONFIG(__base)		(__base + 0x0050)
#define LVTS_EDATA00(__base)	(__base + 0x0054)
#define LVTS_EDATA01(__base)	(__base + 0x0058)
#define LVTS_EDATA02(__base)	(__base + 0x005C)
#define LVTS_EDATA03(__base)	(__base + 0x0060)
#define LVTS_MSR0(__base)		(__base + 0x0090)
#define LVTS_MSR1(__base)		(__base + 0x0094)
#define LVTS_MSR2(__base)		(__base + 0x0098)
#define LVTS_MSR3(__base)		(__base + 0x009C)
#define LVTS_IMMD0(__base)		(__base + 0x00A0)
#define LVTS_IMMD1(__base)		(__base + 0x00A4)
#define LVTS_IMMD2(__base)		(__base + 0x00A8)
#define LVTS_IMMD3(__base)		(__base + 0x00AC)
#define LVTS_PROTCTL(__base)	(__base + 0x00C0)
#define LVTS_PROTTA(__base)		(__base + 0x00C4)
#define LVTS_PROTTB(__base)		(__base + 0x00C8)
#define LVTS_PROTTC(__base)		(__base + 0x00CC)
#define LVTS_CLKEN(__base)		(__base + 0x00E4)

#define LVTS_PERIOD_UNIT			((118 * 1000) / (256 * 38))
#define LVTS_GROUP_INTERVAL			1
#define LVTS_FILTER_INTERVAL		1
#define LVTS_SENSOR_INTERVAL		1
#define LVTS_HW_FILTER				0x2
#define LVTS_TSSEL_CONF				0x13121110
#define LVTS_CALSCALE_CONF			0x300
#define LVTS_MONINT_CONF			0x9FBF7BDE

#define LVTS_INT_SENSOR0			0x0009001F
#define LVTS_INT_SENSOR1			0x001203E0
#define LVTS_INT_SENSOR2			0x00247C00
#define LVTS_INT_SENSOR3			0x1FC00000

#define LVTS_SENSOR_MAX				4
#define LVTS_GOLDEN_TEMP_MAX		62
#define LVTS_GOLDEN_TEMP_DEFAULT	50
#define LVTS_COEFF_A				-250460
#define LVTS_COEFF_B				250460

#define LVTS_MSR_IMMEDIATE_MODE		0
#define LVTS_MSR_FILTERED_MODE		1

#define LVTS_HW_SHUTDOWN_MT8195		105000

static int golden_temp = LVTS_GOLDEN_TEMP_DEFAULT;
static int coeff_b = LVTS_COEFF_B;

struct lvts_sensor_data {
	int dt_id;
};

struct lvts_ctrl_data {
	struct lvts_sensor_data lvts_sensor[LVTS_SENSOR_MAX];
	int cal_offset[LVTS_SENSOR_MAX];
	int hw_tshut_temp;
	int num_lvts_sensor;
	int offset;
	int mode;
};

struct lvts_data {
	const struct lvts_ctrl_data *lvts_ctrl;
	int num_lvts_ctrl;
};

struct lvts_sensor {
	struct thermal_zone_device *tz;
	void __iomem *msr;
	void __iomem *base;
	int id;
	int dt_id;
};

struct lvts_ctrl {
	struct lvts_sensor sensors[LVTS_SENSOR_MAX];
	u32 calibration[LVTS_SENSOR_MAX];
	u32 hw_tshut_raw_temp;
	int num_lvts_sensor;
	int mode;
	void __iomem *base;
};

struct lvts_domain {
	struct lvts_ctrl *lvts_ctrl;
	struct reset_control *reset;
	struct clk *clk;
	int num_lvts_ctrl;
	void __iomem *base;
	size_t calib_len;
	u8 *calib;
#ifdef CONFIG_DEBUG_FS
	struct dentry *dom_dentry;
#endif
};

#ifdef CONFIG_MTK_LVTS_THERMAL_DEBUGFS

#define LVTS_DEBUG_FS_REGS(__reg)		\
{						\
	.name = __stringify(__reg),		\
	.offset = __reg(0),			\
}

static const struct debugfs_reg32 lvts_regs[] = {
	LVTS_DEBUG_FS_REGS(LVTS_MONCTL0),
	LVTS_DEBUG_FS_REGS(LVTS_MONCTL1),
	LVTS_DEBUG_FS_REGS(LVTS_MONCTL2),
	LVTS_DEBUG_FS_REGS(LVTS_MONINT),
	LVTS_DEBUG_FS_REGS(LVTS_MONINTSTS),
	LVTS_DEBUG_FS_REGS(LVTS_MONIDET0),
	LVTS_DEBUG_FS_REGS(LVTS_MONIDET1),
	LVTS_DEBUG_FS_REGS(LVTS_MONIDET2),
	LVTS_DEBUG_FS_REGS(LVTS_MONIDET3),
	LVTS_DEBUG_FS_REGS(LVTS_H2NTHRE),
	LVTS_DEBUG_FS_REGS(LVTS_HTHRE),
	LVTS_DEBUG_FS_REGS(LVTS_OFFSETH),
	LVTS_DEBUG_FS_REGS(LVTS_OFFSETL),
	LVTS_DEBUG_FS_REGS(LVTS_MSRCTL0),
	LVTS_DEBUG_