635 lines
17 KiB
C
635 lines
17 KiB
C
/*
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* drivers/thermal/sunxi_thermal/sunxi_ths_driver.c
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*
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* Copyright (C) 2013-2024 allwinner.
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* JiaRui Xiao<xiaojiarui@allwinnertech.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#define NEED_DEBUG (0)
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#if NEED_DEBUG
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#define DEBUG
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#endif
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/gpio.h>
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#include <linux/slab.h>
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#include <linux/clk.h>
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#include <linux/delay.h>
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#include <linux/of_gpio.h>
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#include <asm/irq.h>
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#include <asm/io.h>
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#include <linux/platform_device.h>
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#include <linux/device.h>
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#include <linux/irq.h>
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#include <linux/thermal.h>
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#include <linux/of_platform.h>
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#include <linux/of_irq.h>
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#include <linux/of_address.h>
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#include <linux/sunxi-sid.h>
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#include "sunxi_ths.h"
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#include "sunxi_ths_core.h"
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#include "sunxi_ths_driver.h"
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static struct sunxi_ths_controller *main_ctrl;
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#define THS_INFO(fmt, arg...) \
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pr_warn("[ths]: %s()%d - "fmt, __func__, __LINE__, ##arg)
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/**
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*Init the thermal sensor and show them value in screen
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*/
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static void sunxi_ths_reg_init(struct sunxi_ths_data *ths_data)
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{
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ths_driver_init_reg(ths_data, ths_data->ths_coefficent);
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ths_driver_reg_debug(ths_data, ths_data->ths_coefficent);
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return;
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}
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static void sunxi_ths_exit(struct sunxi_ths_data *ths_data)
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{
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ths_driver_disable_reg(ths_data);
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return;
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}
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#ifdef SUNXI_THERMAL_SUPPORT_IRQ
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static void sunxi_ths_set_alarm_threshold_temp(struct sunxi_ths_data *ths_data,
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u32 id)
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{
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u32 reg, alarm_threshold_temp = 0, alarm_threshold_value = 0;
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struct thermal_sensor_info *sensor_info =
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(struct thermal_sensor_info *)ths_data->data;
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if (sensor_info[id].alarm_irq_type == THS_LOW_TEMP_ALARM)
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alarm_threshold_temp = ths_data->alarm_low_temp;
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else if (sensor_info[id].alarm_irq_type == THS_HIGH_TEMP_ALARM)
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alarm_threshold_temp = ths_data->alarm_high_temp;
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alarm_threshold_value = ths_driver_temp_to_reg(alarm_threshold_temp,
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id, ths_data->ths_coefficent->calcular_para);
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reg = readl(ths_data->base_addr
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+ ths_hw_sensor[id].alarm->threshold.reg);
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reg = SET_BITS(ths_hw_sensor[id].alarm->threshold.shift,
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ths_hw_sensor[id].alarm->threshold.width,
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reg, alarm_threshold_value);
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writel(reg, ths_data->base_addr
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+ ths_hw_sensor[id].alarm->threshold.reg);
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/* Don't need alarm off intterup, so set the alarm off temp 0 */
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alarm_threshold_value = ths_driver_temp_to_reg(0,
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id, ths_data->ths_coefficent->calcular_para);
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reg = readl(ths_data->base_addr
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+ ths_hw_sensor[id].alarm->threshold.reg);
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reg = SET_BITS(ths_hw_sensor[id].alarm_off->threshold.shift,
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ths_hw_sensor[id].alarm->threshold.width,
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reg, alarm_threshold_value);
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writel(reg, ths_data->base_addr
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+ ths_hw_sensor[id].alarm->threshold.reg);
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}
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static int sunxi_ths_set_shut_threshold_temp(struct sunxi_ths_data *ths_data,
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u32 id)
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{
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u32 reg, shut_threshold_value = 0;
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shut_threshold_value = ths_driver_temp_to_reg(ths_data->shut_temp,
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id, ths_data->ths_coefficent->calcular_para);
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reg = readl(ths_data->base_addr
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+ ths_hw_sensor[id].shut->threshold.reg);
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reg = SET_BITS(ths_hw_sensor[id].shut->threshold.shift,
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ths_hw_sensor[id].shut->threshold.width,
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reg, shut_threshold_value);
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writel(reg, ths_data->base_addr
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+ ths_hw_sensor[id].shut->threshold.reg);
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return 0;
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}
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static void sunxi_ths_clr_alarm_irq_pending(struct sunxi_ths_data *ths_data,
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u32 id)
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{
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u32 reg;
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reg = readl(ths_data->base_addr +
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ths_hw_sensor[id].alarm->irq_status.reg);
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reg = SET_BITS(ths_hw_sensor[id].alarm->irq_status.shift, 1, reg, 0x1);
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writel(reg, ths_data->base_addr +
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ths_hw_sensor[id].alarm->irq_status.reg);
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reg = readl(ths_data->base_addr +
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ths_hw_sensor[id].alarm_off->irq_status.reg);
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reg = SET_BITS(ths_hw_sensor[id].alarm_off->irq_status.shift, 1,
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reg, 0x1);
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writel(reg, ths_data->base_addr +
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ths_hw_sensor[id].alarm_off->irq_status.reg);
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}
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static void sunxi_ths_disable_alarm_irq(struct sunxi_ths_data *ths_data, u32 id)
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{
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u32 reg;
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struct thermal_sensor_info *sensor_info =
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(struct thermal_sensor_info *)ths_data->data;
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reg = readl(ths_data->base_addr +
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ths_hw_sensor[id].alarm->irq_enable.reg);
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reg = SET_BITS(ths_hw_sensor[id].alarm->irq_enable.shift, 1, reg, 0x0);
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writel(reg, ths_data->base_addr +
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ths_hw_sensor[id].alarm->irq_enable.reg);
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sensor_info[id].irq_enabled = false;
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}
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static void sunxi_ths_disable_shut_irq(struct sunxi_ths_data *ths_data, u32 id)
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{
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u32 reg;
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reg = readl(ths_data->base_addr +
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ths_hw_sensor[id].shut->irq_enable.reg);
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reg = SET_BITS(ths_hw_sensor[id].shut->irq_enable.shift, 1, reg, 0x0);
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writel(reg, ths_data->base_addr +
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ths_hw_sensor[id].shut->irq_enable.reg);
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}
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static void sunxi_ths_clr_shut_irq_pending(struct sunxi_ths_data *ths_data)
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{
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u32 reg, id;
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/* read irq status,if the bit is 1, then write 1 to clear it */
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for (id = 0; id < ths_data->sensor_cnt; id++) {
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reg = readl(ths_data->base_addr +
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ths_hw_sensor[id].shut->irq_status.reg);
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writel(reg, ths_data->base_addr +
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ths_hw_sensor[id].shut->irq_status.reg);
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}
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}
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static int sunxi_ths_enable_alarm_irq_sensor(struct sunxi_ths_data *data, u32 i)
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{
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u32 reg;
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struct thermal_sensor_info *sensor_info =
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(struct thermal_sensor_info *)data->data;
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/* clear irq pending before enable irq */
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sunxi_ths_clr_alarm_irq_pending(data, i);
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/*enable irq control*/
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reg = readl(data->base_addr + ths_hw_sensor[i].alarm->irq_enable.reg);
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reg = SET_BITS(ths_hw_sensor[i].alarm->irq_enable.shift, 1, reg, 0x1);
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writel(reg, data->base_addr + ths_hw_sensor[i].alarm->irq_enable.reg);
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sensor_info[i].irq_enabled = true;
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return 0;
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}
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/* init enable alarm irq ctrl */
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static void sunxi_ths_enable_alarm_irq_ctrl(struct sunxi_ths_data *ths_data)
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{
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u32 i;
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struct thermal_sensor_info *sensor_info =
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(struct thermal_sensor_info *)ths_data->data;
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for (i = 0; i < ths_data->sensor_cnt; i++) {
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sensor_info[i].alarm_irq_type = THS_LOW_TEMP_ALARM;
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sunxi_ths_set_alarm_threshold_temp(ths_data, i);
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}
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for (i = 0; i < ths_data->sensor_cnt; i++)
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sunxi_ths_enable_alarm_irq_sensor(ths_data, i);
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}
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static int sunxi_ths_enable_sensor_shut_irq(struct sunxi_ths_data *ths_data,
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u32 id)
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{
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u32 reg;
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sunxi_ths_clr_shut_irq_pending(ths_data);
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reg = readl(ths_data->base_addr +
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ths_hw_sensor[id].shut->irq_enable.reg);
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reg = SET_BITS(ths_hw_sensor[id].alarm->irq_enable.shift, 1, reg, 0x1);
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writel(reg, ths_data->base_addr +
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ths_hw_sensor[id].shut->irq_enable.reg);
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return 0;
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}
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static void sunxi_ths_enable_shut_irq_ctrl(struct sunxi_ths_data *ths_data)
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{
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u32 i;
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for (i = 0; i < ths_data->sensor_cnt; i++)
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sunxi_ths_set_shut_threshold_temp(ths_data, i);
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for (i = 0; i < ths_data->sensor_cnt; i++)
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sunxi_ths_enable_sensor_shut_irq(ths_data, i);
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}
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static u32 sunxi_ths_query_alarmirq_pending(struct sunxi_ths_data *data, u32 id)
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{
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u32 reg, irq_mask;
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irq_mask = 1 << ths_hw_sensor[id].alarm->irq_status.shift;
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reg = readl(data->base_addr +
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ths_hw_sensor[id].alarm->irq_status.reg);
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return reg&irq_mask;
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}
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static u32 sunxi_ths_query_shutirq_pending(struct sunxi_ths_data *ths_data)
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{
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u32 reg, i;
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for (i = 0; i < ths_data->sensor_cnt; i++) {
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reg = readl(ths_data->base_addr +
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ths_hw_sensor[i].shut->irq_status.reg);
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if (reg)
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return reg;
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}
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return 0;
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}
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static void sunxi_ths_handle_irq_pending(struct sunxi_ths_data *ths_data)
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{
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u32 id;
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struct thermal_sensor_info *sensor_info =
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(struct thermal_sensor_info *)ths_data->data;
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for (id = 0; id < ths_data->sensor_cnt; id++) {
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if (sensor_info[id].irq_enabled) {
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if (sunxi_ths_query_alarmirq_pending(ths_data, id)) {
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THS_INFO("sensor[%d]&irq-type=%d\n", id,
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sensor_info[id].alarm_irq_type);
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if (sensor_info[id].alarm_irq_type ==
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THS_LOW_TEMP_ALARM) {
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sensor_info[id].alarm_irq_type =
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THS_HIGH_TEMP_ALARM;
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sunxi_ths_set_alarm_threshold_temp(
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ths_data, id);
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} else
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sunxi_ths_disable_alarm_irq(
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ths_data, id);
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}
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}
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sunxi_ths_clr_alarm_irq_pending(ths_data, id);
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}
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/* query shutdowm irq status and handle it*/
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if (sunxi_ths_query_shutirq_pending(ths_data)) {
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THS_INFO("thermal:shutdown intterupt!\n");
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for (id = 0; id < ths_data->sensor_cnt; id++)
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sunxi_ths_disable_shut_irq(ths_data, id);
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sunxi_ths_clr_shut_irq_pending(ths_data);
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}
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}
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static irqreturn_t sunxi_ths_alarm_irq(int irq, void *dev)
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{
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struct sunxi_ths_data *ths_data = dev;
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THS_INFO("alarm_irq\n");
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disable_irq_nosync(irq);
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sunxi_ths_handle_irq_pending(ths_data);
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return IRQ_WAKE_THREAD;
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}
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static irqreturn_t sunxi_ths_alarm_irq_thread(int irq, void *dev)
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{
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struct sunxi_ths_data *ths_data = dev;
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int i;
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struct thermal_sensor_info *sensor_info =
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(struct thermal_sensor_info *)ths_data->data;
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for (i = 0; i < ths_data->combine_cnt; i++) {
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thermal_zone_device_update(ths_data->comb_sensor[i]->tz);
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THS_INFO("sensor[%d]_alarmtemp = %d\n", i, sensor_info[i].temp);
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}
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THS_INFO("alarm_irq_therad\n");
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enable_irq(irq);
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return IRQ_HANDLED;
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}
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static int sunxi_ths_get_sensor_combine_id(struct sunxi_ths_data *ths_data,
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u32 sensor_id)
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{
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u32 i, j;
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struct sunxi_ths_combine_disc *combine;
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for (i = 0; i < ths_data->combine_cnt; i++) {
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combine = ths_data->comb_sensor[i]->combine;
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for (j = 0; j < combine->combine_ths_count; j++) {
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if (sensor_id == combine->combine_ths_id[j])
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return i;
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}
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}
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THS_INFO("ths get combind id failed!\n");
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return -1;
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}
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#else
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static void sunxi_ths_enable_alarm_irq_ctrl(struct sunxi_ths_data *ths_data)
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{
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}
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static void sunxi_ths_enable_shut_irq_ctrl(struct sunxi_ths_data *ths_data)
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{
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}
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#endif
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static int sunxi_ths_get_temp(struct sunxi_ths_controller *controller, u32 id,
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int *temp)
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{
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int t = 0;
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struct sunxi_ths_data *ths_data =
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(struct sunxi_ths_data *)controller->data;
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struct thermal_sensor_info *sensor_info =
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(struct thermal_sensor_info *)ths_data->data;
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#ifdef SUNXI_THERMAL_SUPPORT_IRQ
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int combine_id = sunxi_ths_get_sensor_combine_id(ths_data, id);
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enum thermal_device_mode mode;
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struct thermal_zone_device *tz = ths_data->comb_sensor[combine_id]->tz;
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#endif
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if (ths_data->sensor_cnt <= id) {
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thsprintk("ths driver get wrong sensor num!\n");
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return -1;
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}
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/* if sensor data is not ready, return the last time temp */
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t = ths_driver_get_temp(ths_data, id);
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if (t == NO_DATA_INTTERUPT) {
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t = sensor_info[id].temp;
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}
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if (-40 > t || 180 < t) {
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thsprintk("ths driver get unvalid temp!\n");
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return t;
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}
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sensor_info[id].temp = t;
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*temp = t;
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#ifdef SUNXI_THERMAL_SUPPORT_IRQ
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tz->ops->get_mode(tz, &mode);
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if (combine_id >= 0 && mode == THERMAL_DEVICE_PERFORMANCE) {
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sunxi_ths_disable_alarm_irq(ths_data, id);
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sunxi_ths_disable_shut_irq(ths_data, id);
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return 0;
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}
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if (t < (ths_data->alarm_high_temp - ths_data->alarm_temp_hysteresis)) {
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if (!sensor_info[id].irq_enabled) {
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sunxi_ths_enable_alarm_irq_sensor(ths_data, id);
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sunxi_ths_enable_sensor_shut_irq(ths_data, id);
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}
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if (sensor_info[id].alarm_irq_type == THS_HIGH_TEMP_ALARM) {
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sensor_info[id].alarm_irq_type = THS_LOW_TEMP_ALARM;
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sunxi_ths_set_alarm_threshold_temp(ths_data, id);
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}
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}
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#endif
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return 0;
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}
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static void sunxi_ths_info_init(struct thermal_sensor_info *sensor_info,
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int sensor_num)
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{
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sensor_num -= 1;
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while (sensor_num >= 0) {
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sensor_info[sensor_num].id = sensor_num;
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sensor_info[sensor_num].ths_name = id_name_mapping[sensor_num];
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sensor_info[sensor_num].temp = 0;
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sensor_info[sensor_num].alarm_irq_type = THS_LOW_TEMP_ALARM;
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sensor_info[sensor_num].irq_enabled = false;
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thsprintk("sensor_info:id=%d,name=%s,temp=%d!\n",
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sensor_info[sensor_num].id,
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sensor_info[sensor_num].ths_name,
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sensor_info[sensor_num].temp);
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sensor_num--;
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}
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return;
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}
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static void sunxi_ths_coefficent_init(struct thermal_sensor_coefficent *ths_coe)
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{
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ths_coe->calcular_para = thermal_cal_coefficent;
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ths_coe->reg_para = thermal_reg_init;
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return;
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}
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static void sunxi_ths_para_init(struct sunxi_ths_data *ths_data,
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struct thermal_sensor_info *sensor_info)
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{
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sunxi_ths_info_init(sensor_info, ths_data->sensor_cnt);
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sunxi_ths_coefficent_init(ths_data->ths_coefficent);
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ths_data->data = sensor_info;
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return;
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}
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int sunxi_get_sensor_temp(u32 sensor_num, int *temperature)
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{
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return sunxi_ths_get_temp(main_ctrl, sensor_num, temperature);
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}
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EXPORT_SYMBOL(sunxi_get_sensor_temp);
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static int sunxi_ths_suspend(struct sunxi_ths_controller *controller)
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{
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struct sunxi_ths_data *ths_data =
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(struct sunxi_ths_data *)controller->data;
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thsprintk("enter: sunxi_ths_controller_suspend.\n");
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atomic_set(&controller->is_suspend, 1);
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sunxi_ths_exit(ths_data);
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if (ths_data->parent_clk == true)
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clk_disable_unprepare(ths_data->mclk);
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return 0;
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}
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static int sunxi_ths_resume(struct sunxi_ths_controller *controller)
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{
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struct sunxi_ths_data *ths_data =
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(struct sunxi_ths_data *)controller->data;
|
|
|
|
thsprintk("enter: sunxi_ths_controller_resume.\n");
|
|
if (ths_data->parent_clk == true)
|
|
clk_prepare_enable(ths_data->mclk);
|
|
sunxi_ths_reg_init(ths_data);
|
|
#ifdef SUNXI_THERMAL_SUPPORT_IRQ
|
|
sunxi_ths_enable_alarm_irq_ctrl(ths_data);
|
|
sunxi_ths_enable_shut_irq_ctrl(ths_data);
|
|
#endif
|
|
atomic_set(&controller->is_suspend, 0);
|
|
return 0;
|
|
}
|
|
|
|
struct sunxi_ths_controller_ops sunxi_ths_ops = {
|
|
.suspend = sunxi_ths_suspend,
|
|
.resume = sunxi_ths_resume,
|
|
.get_temp = sunxi_ths_get_temp,
|
|
};
|
|
|
|
static int sunxi_ths_probe(struct platform_device *pdev)
|
|
{
|
|
int err = 0;
|
|
struct sunxi_ths_data *ths_data;
|
|
struct sunxi_ths_controller *ctrl;
|
|
struct thermal_sensor_info *sensor_info;
|
|
|
|
thsprintk("sunxi ths sensor probe start !\n");
|
|
if (!pdev->dev.of_node) {
|
|
pr_err("%s:sunxi ths device tree err!\n", __func__);
|
|
return -EBUSY;
|
|
}
|
|
|
|
ths_data = kzalloc(sizeof(*ths_data), GFP_KERNEL);
|
|
if (IS_ERR_OR_NULL(ths_data)) {
|
|
pr_err("ths_data: not enough memory for ths_data\n");
|
|
err = -ENOMEM;
|
|
goto fail0;
|
|
}
|
|
|
|
ths_data->ths_coefficent =
|
|
kzalloc(sizeof(*ths_data->ths_coefficent), GFP_KERNEL);
|
|
if (IS_ERR_OR_NULL(ths_data->ths_coefficent)) {
|
|
pr_err("ths_coe: not enough memory for ths_coe\n");
|
|
err = -ENOMEM;
|
|
goto fail1;
|
|
}
|
|
|
|
mutex_init(&ths_data->ths_mutex_lock);
|
|
ths_data->parent_clk = ENABLE_CLK;
|
|
ths_data->ths_driver_version = THERMAL_VERSION;
|
|
ths_data->cp_ft_flag = 0;
|
|
ths_data->pdev = pdev;
|
|
|
|
err = ths_driver_startup(ths_data, &pdev->dev);
|
|
if (err)
|
|
goto fail2;
|
|
|
|
ths_data->comb_sensor = kzalloc(ths_data->combine_cnt *
|
|
(sizeof(struct sunxi_ths_sensor *)), GFP_KERNEL);
|
|
if (IS_ERR_OR_NULL(ths_data->comb_sensor)) {
|
|
pr_err("ths_comb_sensor: not enough memory to alloc!\n");
|
|
err = -ENOMEM;
|
|
goto fail3;
|
|
}
|
|
|
|
#ifdef SUNXI_THERMAL_SUPPORT_IRQ
|
|
err = devm_request_threaded_irq(&pdev->dev, ths_data->irq,
|
|
sunxi_ths_alarm_irq,
|
|
sunxi_ths_alarm_irq_thread,
|
|
0, "sunxi_thermal", ths_data);
|
|
if (err < 0) {
|
|
pr_err("failed to request alarm irq: %d\n", err);
|
|
return err;
|
|
}
|
|
#endif
|
|
|
|
sensor_info =
|
|
kcalloc(ths_data->sensor_cnt, sizeof(*sensor_info), GFP_KERNEL);
|
|
if (IS_ERR_OR_NULL(sensor_info)) {
|
|
pr_err("sensor_info: not enough memory for sensor_info\n");
|
|
err = -ENOMEM;
|
|
goto fail4;
|
|
}
|
|
|
|
sunxi_ths_para_init(ths_data, sensor_info);
|
|
platform_set_drvdata(pdev, ths_data);
|
|
ths_driver_clk_cfg(ths_data);
|
|
sunxi_ths_reg_init(ths_data);
|
|
sunxi_ths_enable_alarm_irq_ctrl(ths_data);
|
|
sunxi_ths_enable_shut_irq_ctrl(ths_data);
|
|
|
|
ths_driver_create_sensor_info_attrs(ths_data, sensor_info);
|
|
|
|
ctrl = sunxi_ths_controller_register(&pdev->dev,
|
|
&sunxi_ths_ops, ths_data);
|
|
if (!ctrl) {
|
|
pr_err("ths_data: thermal controller register err.\n");
|
|
err = -ENOMEM;
|
|
goto fail2;
|
|
}
|
|
ths_data->ctrl = ctrl;
|
|
main_ctrl = ctrl;
|
|
thsprintk("sunxi_ths_controller is ok.\n");
|
|
|
|
return 0;
|
|
fail4:
|
|
kfree(sensor_info);
|
|
sensor_info = NULL;
|
|
fail3:
|
|
kfree(ths_data->comb_sensor);
|
|
ths_data->comb_sensor = NULL;
|
|
fail2:
|
|
kfree(ths_data->ths_coefficent);
|
|
ths_data->ths_coefficent = NULL;
|
|
fail1:
|
|
kfree(ths_data);
|
|
ths_data = NULL;
|
|
fail0:
|
|
return err;
|
|
}
|
|
|
|
static int sunxi_ths_remove(struct platform_device *pdev)
|
|
{
|
|
struct sunxi_ths_data *ths_data = platform_get_drvdata(pdev);
|
|
sunxi_ths_controller_unregister(ths_data->ctrl);
|
|
sunxi_ths_exit(ths_data);
|
|
ths_driver_clk_uncfg(ths_data);
|
|
ths_drvier_remove_trip_attrs(ths_data);
|
|
kfree(ths_data->ths_coefficent);
|
|
kfree(ths_data);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_OF
|
|
/* Translate OpenFirmware node properties into platform_data */
|
|
static struct of_device_id sunxi_ths_of_match[] = {
|
|
{.compatible = "allwinner,thermal_sensor",},
|
|
{},
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(of, sunxi_ths_of_match);
|
|
#endif
|
|
|
|
static struct platform_driver sunxi_ths_driver = {
|
|
.probe = sunxi_ths_probe,
|
|
.remove = sunxi_ths_remove,
|
|
.driver = {
|
|
.name = SUNXI_THS_NAME,
|
|
.owner = THIS_MODULE,
|
|
.of_match_table = of_match_ptr(sunxi_ths_of_match),
|
|
},
|
|
};
|
|
static int __init sunxi_thermal_sensor_init(void)
|
|
{
|
|
return platform_driver_register(&sunxi_ths_driver);
|
|
}
|
|
|
|
static void __exit sunxi_thermal_sensor_exit(void)
|
|
{
|
|
platform_driver_unregister(&sunxi_ths_driver);
|
|
}
|
|
|
|
subsys_initcall_sync(sunxi_thermal_sensor_init);
|
|
module_exit(sunxi_thermal_sensor_exit);
|
|
|
|
MODULE_DESCRIPTION("SUNXI thermal sensor driver");
|
|
MODULE_AUTHOR("JRXiao");
|
|
MODULE_LICENSE("GPL v2");
|