diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-12-17 10:16:27 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-12-17 10:16:27 -0800 |
commit | 2efda9042d76fcab0fb87b7ee8d84da52bf122b0 (patch) | |
tree | f390199ae330fbe20b3c9d8fe1021d909f752421 /drivers/thermal/rockchip_thermal.c | |
parent | 0b4954c46943e8f15b9379eed4f133c874a0bc66 (diff) | |
parent | 2707dbd09a859b7205917f9baf9d0192944ac46c (diff) | |
download | op-kernel-dev-2efda9042d76fcab0fb87b7ee8d84da52bf122b0.zip op-kernel-dev-2efda9042d76fcab0fb87b7ee8d84da52bf122b0.tar.gz |
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux
Pull thermal management update from Zhang Rui:
"Summary:
- of-thermal extension to allow drivers to register and use its
functionality in a better way, without exploiting thermal core.
From Lukasz Majewski.
- Fix a bug in intel_soc_dts_thermal driver which calls a sleep
function in interrupt handler. From Maurice Petallo.
- add a thermal UAPI header file for exporting the thermal generic
netlink information to user-space. From Florian Fainelli.
- First round of refactoring in Exynos driver. Bartlomiej and Lukasz
are attempting to make it lean and easier to understand.
- New thermal driver for Rockchip (rk3288), with support for DT
thermal. From Caesar Wang.
- New thermal driver for Nvidia, Tegra124 SOCTHERM driver, with
support for DT thermal. From Mikko Perttunen.
- New cooling device, based on common clock framework. From Eduardo
Valentin.
- a couple of small fixes in thermal core framework. From Srinivas
Pandruvada, Javi Merino, Luis Henriques.
- Dropping Armada A375-Z1 SoC thermal support as the chip is not in
the market, armada folks decided to drop its support.
- a couple of small fixes and cleanups in int340x thermal driver"
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux: (58 commits)
thermal: provide an UAPI header file
Thermal/int340x: Clear the error value of the last acpi_bus_get_device() call
thermal/powerclamp: add id for braswell cpu
thermal: Intel SoC DTS: Don't do thermal zone update inside spin_lock
Thermal: fix platform_no_drv_owner.cocci warnings
Thermal/int340x: avoid unnecessary pointer casting
thermal: int3403: Delete a check before thermal_zone_device_unregister()
thermal/int3400: export uuids
thermal: of: Extend current of-thermal.c code to allow setting emulated temp
thermal: of: Extend of-thermal to export table of trip points
thermal: of: Rename struct __thermal_trip to struct thermal_trip
thermal: of: Extend of-thermal.c to provide check if trip point is valid
thermal: of: Extend of-thermal.c to provide number of trip points
thermal: Fix error path in thermal_init()
thermal: lock the thermal zone when switching governors
thermal: core: ignore invalid trip temperature
thermal: armada: Remove support for A375-Z1 SoC
thermal: rockchip: add driver for thermal
dt-bindings: document Rockchip thermal
thermal: exynos: remove exynos_tmu_data.h include
...
Diffstat (limited to 'drivers/thermal/rockchip_thermal.c')
-rw-r--r-- | drivers/thermal/rockchip_thermal.c | 693 |
1 files changed, 693 insertions, 0 deletions
diff --git a/drivers/thermal/rockchip_thermal.c b/drivers/thermal/rockchip_thermal.c new file mode 100644 index 0000000..1bcddfc --- /dev/null +++ b/drivers/thermal/rockchip_thermal.c @@ -0,0 +1,693 @@ +/* + * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + */ + +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> +#include <linux/platform_device.h> +#include <linux/reset.h> +#include <linux/thermal.h> + +/** + * If the temperature over a period of time High, + * the resulting TSHUT gave CRU module,let it reset the entire chip, + * or via GPIO give PMIC. + */ +enum tshut_mode { + TSHUT_MODE_CRU = 0, + TSHUT_MODE_GPIO, +}; + +/** + * the system Temperature Sensors tshut(tshut) polarity + * the bit 8 is tshut polarity. + * 0: low active, 1: high active + */ +enum tshut_polarity { + TSHUT_LOW_ACTIVE = 0, + TSHUT_HIGH_ACTIVE, +}; + +/** + * The system has three Temperature Sensors. channel 0 is reserved, + * channel 1 is for CPU, and channel 2 is for GPU. + */ +enum sensor_id { + SENSOR_CPU = 1, + SENSOR_GPU, +}; + +struct rockchip_tsadc_chip { + /* The hardware-controlled tshut property */ + long tshut_temp; + enum tshut_mode tshut_mode; + enum tshut_polarity tshut_polarity; + + /* Chip-wide methods */ + void (*initialize)(void __iomem *reg, enum tshut_polarity p); + void (*irq_ack)(void __iomem *reg); + void (*control)(void __iomem *reg, bool on); + + /* Per-sensor methods */ + int (*get_temp)(int chn, void __iomem *reg, long *temp); + void (*set_tshut_temp)(int chn, void __iomem *reg, long temp); + void (*set_tshut_mode)(int chn, void __iomem *reg, enum tshut_mode m); +}; + +struct rockchip_thermal_sensor { + struct rockchip_thermal_data *thermal; + struct thermal_zone_device *tzd; + enum sensor_id id; +}; + +#define NUM_SENSORS 2 /* Ignore unused sensor 0 */ + +struct rockchip_thermal_data { + const struct rockchip_tsadc_chip *chip; + struct platform_device *pdev; + struct reset_control *reset; + + struct rockchip_thermal_sensor sensors[NUM_SENSORS]; + + struct clk *clk; + struct clk *pclk; + + void __iomem *regs; + + long tshut_temp; + enum tshut_mode tshut_mode; + enum tshut_polarity tshut_polarity; +}; + +/* TSADC V2 Sensor info define: */ +#define TSADCV2_AUTO_CON 0x04 +#define TSADCV2_INT_EN 0x08 +#define TSADCV2_INT_PD 0x0c +#define TSADCV2_DATA(chn) (0x20 + (chn) * 0x04) +#define TSADCV2_COMP_SHUT(chn) (0x40 + (chn) * 0x04) +#define TSADCV2_HIGHT_INT_DEBOUNCE 0x60 +#define TSADCV2_HIGHT_TSHUT_DEBOUNCE 0x64 +#define TSADCV2_AUTO_PERIOD 0x68 +#define TSADCV2_AUTO_PERIOD_HT 0x6c + +#define TSADCV2_AUTO_EN BIT(0) +#define TSADCV2_AUTO_DISABLE ~BIT(0) +#define TSADCV2_AUTO_SRC_EN(chn) BIT(4 + (chn)) +#define TSADCV2_AUTO_TSHUT_POLARITY_HIGH BIT(8) +#define TSADCV2_AUTO_TSHUT_POLARITY_LOW ~BIT(8) + +#define TSADCV2_INT_SRC_EN(chn) BIT(chn) +#define TSADCV2_SHUT_2GPIO_SRC_EN(chn) BIT(4 + (chn)) +#define TSADCV2_SHUT_2CRU_SRC_EN(chn) BIT(8 + (chn)) + +#define TSADCV2_INT_PD_CLEAR ~BIT(8) + +#define TSADCV2_DATA_MASK 0xfff +#define TSADCV2_HIGHT_INT_DEBOUNCE_COUNT 4 +#define TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT 4 +#define TSADCV2_AUTO_PERIOD_TIME 250 /* msec */ +#define TSADCV2_AUTO_PERIOD_HT_TIME 50 /* msec */ + +struct tsadc_table { + unsigned long code; + long temp; +}; + +static const struct tsadc_table v2_code_table[] = { + {TSADCV2_DATA_MASK, -40000}, + {3800, -40000}, + {3792, -35000}, + {3783, -30000}, + {3774, -25000}, + {3765, -20000}, + {3756, -15000}, + {3747, -10000}, + {3737, -5000}, + {3728, 0}, + {3718, 5000}, + {3708, 10000}, + {3698, 15000}, + {3688, 20000}, + {3678, 25000}, + {3667, 30000}, + {3656, 35000}, + {3645, 40000}, + {3634, 45000}, + {3623, 50000}, + {3611, 55000}, + {3600, 60000}, + {3588, 65000}, + {3575, 70000}, + {3563, 75000}, + {3550, 80000}, + {3537, 85000}, + {3524, 90000}, + {3510, 95000}, + {3496, 100000}, + {3482, 105000}, + {3467, 110000}, + {3452, 115000}, + {3437, 120000}, + {3421, 125000}, + {0, 125000}, +}; + +static u32 rk_tsadcv2_temp_to_code(long temp) +{ + int high, low, mid; + + low = 0; + high = ARRAY_SIZE(v2_code_table) - 1; + mid = (high + low) / 2; + + if (temp < v2_code_table[low].temp || temp > v2_code_table[high].temp) + return 0; + + while (low <= high) { + if (temp == v2_code_table[mid].temp) + return v2_code_table[mid].code; + else if (temp < v2_code_table[mid].temp) + high = mid - 1; + else + low = mid + 1; + mid = (low + high) / 2; + } + + return 0; +} + +static long rk_tsadcv2_code_to_temp(u32 code) +{ + int high, low, mid; + + low = 0; + high = ARRAY_SIZE(v2_code_table) - 1; + mid = (high + low) / 2; + + if (code > v2_code_table[low].code || code < v2_code_table[high].code) + return 125000; /* No code available, return max temperature */ + + while (low <= high) { + if (code >= v2_code_table[mid].code && code < + v2_code_table[mid - 1].code) + return v2_code_table[mid].temp; + else if (code < v2_code_table[mid].code) + low = mid + 1; + else + high = mid - 1; + mid = (low + high) / 2; + } + + return 125000; +} + +/** + * rk_tsadcv2_initialize - initialize TASDC Controller + * (1) Set TSADCV2_AUTO_PERIOD, configure the interleave between + * every two accessing of TSADC in normal operation. + * (2) Set TSADCV2_AUTO_PERIOD_HT, configure the interleave between + * every two accessing of TSADC after the temperature is higher + * than COM_SHUT or COM_INT. + * (3) Set TSADCV2_HIGH_INT_DEBOUNCE and TSADC_HIGHT_TSHUT_DEBOUNCE, + * if the temperature is higher than COMP_INT or COMP_SHUT for + * "debounce" times, TSADC controller will generate interrupt or TSHUT. + */ +static void rk_tsadcv2_initialize(void __iomem *regs, + enum tshut_polarity tshut_polarity) +{ + if (tshut_polarity == TSHUT_HIGH_ACTIVE) + writel_relaxed(0 | (TSADCV2_AUTO_TSHUT_POLARITY_HIGH), + regs + TSADCV2_AUTO_CON); + else + writel_relaxed(0 | (TSADCV2_AUTO_TSHUT_POLARITY_LOW), + regs + TSADCV2_AUTO_CON); + + writel_relaxed(TSADCV2_AUTO_PERIOD_TIME, regs + TSADCV2_AUTO_PERIOD); + writel_relaxed(TSADCV2_HIGHT_INT_DEBOUNCE_COUNT, + regs + TSADCV2_HIGHT_INT_DEBOUNCE); + writel_relaxed(TSADCV2_AUTO_PERIOD_HT_TIME, + regs + TSADCV2_AUTO_PERIOD_HT); + writel_relaxed(TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT, + regs + TSADCV2_HIGHT_TSHUT_DEBOUNCE); +} + +static void rk_tsadcv2_irq_ack(void __iomem *regs) +{ + u32 val; + + val = readl_relaxed(regs + TSADCV2_INT_PD); + writel_relaxed(val & TSADCV2_INT_PD_CLEAR, regs + TSADCV2_INT_PD); +} + +static void rk_tsadcv2_control(void __iomem *regs, bool enable) +{ + u32 val; + + val = readl_relaxed(regs + TSADCV2_AUTO_CON); + if (enable) + val |= TSADCV2_AUTO_EN; + else + val &= ~TSADCV2_AUTO_EN; + + writel_relaxed(val, regs + TSADCV2_AUTO_CON); +} + +static int rk_tsadcv2_get_temp(int chn, void __iomem *regs, long *temp) +{ + u32 val; + + /* the A/D value of the channel last conversion need some time */ + val = readl_relaxed(regs + TSADCV2_DATA(chn)); + if (val == 0) + return -EAGAIN; + + *temp = rk_tsadcv2_code_to_temp(val); + + return 0; +} + +static void rk_tsadcv2_tshut_temp(int chn, void __iomem *regs, long temp) +{ + u32 tshut_value, val; + + tshut_value = rk_tsadcv2_temp_to_code(temp); + writel_relaxed(tshut_value, regs + TSADCV2_COMP_SHUT(chn)); + + /* TSHUT will be valid */ + val = readl_relaxed(regs + TSADCV2_AUTO_CON); + writel_relaxed(val | TSADCV2_AUTO_SRC_EN(chn), regs + TSADCV2_AUTO_CON); +} + +static void rk_tsadcv2_tshut_mode(int chn, void __iomem *regs, + enum tshut_mode mode) +{ + u32 val; + + val = readl_relaxed(regs + TSADCV2_INT_EN); + if (mode == TSHUT_MODE_GPIO) { + val &= ~TSADCV2_SHUT_2CRU_SRC_EN(chn); + val |= TSADCV2_SHUT_2GPIO_SRC_EN(chn); + } else { + val &= ~TSADCV2_SHUT_2GPIO_SRC_EN(chn); + val |= TSADCV2_SHUT_2CRU_SRC_EN(chn); + } + + writel_relaxed(val, regs + TSADCV2_INT_EN); +} + +static const struct rockchip_tsadc_chip rk3288_tsadc_data = { + .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */ + .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */ + .tshut_temp = 95000, + + .initialize = rk_tsadcv2_initialize, + .irq_ack = rk_tsadcv2_irq_ack, + .control = rk_tsadcv2_control, + .get_temp = rk_tsadcv2_get_temp, + .set_tshut_temp = rk_tsadcv2_tshut_temp, + .set_tshut_mode = rk_tsadcv2_tshut_mode, +}; + +static const struct of_device_id of_rockchip_thermal_match[] = { + { + .compatible = "rockchip,rk3288-tsadc", + .data = (void *)&rk3288_tsadc_data, + }, + { /* end */ }, +}; +MODULE_DEVICE_TABLE(of, of_rockchip_thermal_match); + +static void +rockchip_thermal_toggle_sensor(struct rockchip_thermal_sensor *sensor, bool on) +{ + struct thermal_zone_device *tzd = sensor->tzd; + + tzd->ops->set_mode(tzd, + on ? THERMAL_DEVICE_ENABLED : THERMAL_DEVICE_DISABLED); +} + +static irqreturn_t rockchip_thermal_alarm_irq_thread(int irq, void *dev) +{ + struct rockchip_thermal_data *thermal = dev; + int i; + + dev_dbg(&thermal->pdev->dev, "thermal alarm\n"); + + thermal->chip->irq_ack(thermal->regs); + + for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) + thermal_zone_device_update(thermal->sensors[i].tzd); + + return IRQ_HANDLED; +} + +static int rockchip_thermal_get_temp(void *_sensor, long *out_temp) +{ + struct rockchip_thermal_sensor *sensor = _sensor; + struct rockchip_thermal_data *thermal = sensor->thermal; + const struct rockchip_tsadc_chip *tsadc = sensor->thermal->chip; + int retval; + + retval = tsadc->get_temp(sensor->id, thermal->regs, out_temp); + dev_dbg(&thermal->pdev->dev, "sensor %d - temp: %ld, retval: %d\n", + sensor->id, *out_temp, retval); + + return retval; +} + +static const struct thermal_zone_of_device_ops rockchip_of_thermal_ops = { + .get_temp = rockchip_thermal_get_temp, +}; + +static int rockchip_configure_from_dt(struct device *dev, + struct device_node *np, + struct rockchip_thermal_data *thermal) +{ + u32 shut_temp, tshut_mode, tshut_polarity; + + if (of_property_read_u32(np, "rockchip,hw-tshut-temp", &shut_temp)) { + dev_warn(dev, + "Missing tshut temp property, using default %ld\n", + thermal->chip->tshut_temp); + thermal->tshut_temp = thermal->chip->tshut_temp; + } else { + thermal->tshut_temp = shut_temp; + } + + if (thermal->tshut_temp > INT_MAX) { + dev_err(dev, "Invalid tshut temperature specified: %ld\n", + thermal->tshut_temp); + return -ERANGE; + } + + if (of_property_read_u32(np, "rockchip,hw-tshut-mode", &tshut_mode)) { + dev_warn(dev, + "Missing tshut mode property, using default (%s)\n", + thermal->chip->tshut_mode == TSHUT_MODE_GPIO ? + "gpio" : "cru"); + thermal->tshut_mode = thermal->chip->tshut_mode; + } else { + thermal->tshut_mode = tshut_mode; + } + + if (thermal->tshut_mode > 1) { + dev_err(dev, "Invalid tshut mode specified: %d\n", + thermal->tshut_mode); + return -EINVAL; + } + + if (of_property_read_u32(np, "rockchip,hw-tshut-polarity", + &tshut_polarity)) { + dev_warn(dev, + "Missing tshut-polarity property, using default (%s)\n", + thermal->chip->tshut_polarity == TSHUT_LOW_ACTIVE ? + "low" : "high"); + thermal->tshut_polarity = thermal->chip->tshut_polarity; + } else { + thermal->tshut_polarity = tshut_polarity; + } + + if (thermal->tshut_polarity > 1) { + dev_err(dev, "Invalid tshut-polarity specified: %d\n", + thermal->tshut_polarity); + return -EINVAL; + } + + return 0; +} + +static int +rockchip_thermal_register_sensor(struct platform_device *pdev, + struct rockchip_thermal_data *thermal, + struct rockchip_thermal_sensor *sensor, + enum sensor_id id) +{ + const struct rockchip_tsadc_chip *tsadc = thermal->chip; + int error; + + tsadc->set_tshut_mode(id, thermal->regs, thermal->tshut_mode); + tsadc->set_tshut_temp(id, thermal->regs, thermal->tshut_temp); + + sensor->thermal = thermal; + sensor->id = id; + sensor->tzd = thermal_zone_of_sensor_register(&pdev->dev, id, sensor, + &rockchip_of_thermal_ops); + if (IS_ERR(sensor->tzd)) { + error = PTR_ERR(sensor->tzd); + dev_err(&pdev->dev, "failed to register sensor %d: %d\n", + id, error); + return error; + } + + return 0; +} + +/* + * Reset TSADC Controller, reset all tsadc registers. + */ +static void rockchip_thermal_reset_controller(struct reset_control *reset) +{ + reset_control_assert(reset); + usleep_range(10, 20); + reset_control_deassert(reset); +} + +static int rockchip_thermal_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct rockchip_thermal_data *thermal; + const struct of_device_id *match; + struct resource *res; + int irq; + int i; + int error; + + match = of_match_node(of_rockchip_thermal_match, np); + if (!match) + return -ENXIO; + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(&pdev->dev, "no irq resource?\n"); + return -EINVAL; + } + + thermal = devm_kzalloc(&pdev->dev, sizeof(struct rockchip_thermal_data), + GFP_KERNEL); + if (!thermal) + return -ENOMEM; + + thermal->pdev = pdev; + + thermal->chip = (const struct rockchip_tsadc_chip *)match->data; + if (!thermal->chip) + return -EINVAL; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + thermal->regs = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(thermal->regs)) + return PTR_ERR(thermal->regs); + + thermal->reset = devm_reset_control_get(&pdev->dev, "tsadc-apb"); + if (IS_ERR(thermal->reset)) { + error = PTR_ERR(thermal->reset); + dev_err(&pdev->dev, "failed to get tsadc reset: %d\n", error); + return error; + } + + thermal->clk = devm_clk_get(&pdev->dev, "tsadc"); + if (IS_ERR(thermal->clk)) { + error = PTR_ERR(thermal->clk); + dev_err(&pdev->dev, "failed to get tsadc clock: %d\n", error); + return error; + } + + thermal->pclk = devm_clk_get(&pdev->dev, "apb_pclk"); + if (IS_ERR(thermal->pclk)) { + error = PTR_ERR(thermal->clk); + dev_err(&pdev->dev, "failed to get apb_pclk clock: %d\n", + error); + return error; + } + + error = clk_prepare_enable(thermal->clk); + if (error) { + dev_err(&pdev->dev, "failed to enable converter clock: %d\n", + error); + return error; + } + + error = clk_prepare_enable(thermal->pclk); + if (error) { + dev_err(&pdev->dev, "failed to enable pclk: %d\n", error); + goto err_disable_clk; + } + + rockchip_thermal_reset_controller(thermal->reset); + + error = rockchip_configure_from_dt(&pdev->dev, np, thermal); + if (error) { + dev_err(&pdev->dev, "failed to parse device tree data: %d\n", + error); + goto err_disable_pclk; + } + + thermal->chip->initialize(thermal->regs, thermal->tshut_polarity); + + error = rockchip_thermal_register_sensor(pdev, thermal, + &thermal->sensors[0], + SENSOR_CPU); + if (error) { + dev_err(&pdev->dev, + "failed to register CPU thermal sensor: %d\n", error); + goto err_disable_pclk; + } + + error = rockchip_thermal_register_sensor(pdev, thermal, + &thermal->sensors[1], + SENSOR_GPU); + if (error) { + dev_err(&pdev->dev, + "failed to register GPU thermal sensor: %d\n", error); + goto err_unregister_cpu_sensor; + } + + error = devm_request_threaded_irq(&pdev->dev, irq, NULL, + &rockchip_thermal_alarm_irq_thread, + IRQF_ONESHOT, + "rockchip_thermal", thermal); + if (error) { + dev_err(&pdev->dev, + "failed to request tsadc irq: %d\n", error); + goto err_unregister_gpu_sensor; + } + + thermal->chip->control(thermal->regs, true); + + for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) + rockchip_thermal_toggle_sensor(&thermal->sensors[i], true); + + platform_set_drvdata(pdev, thermal); + + return 0; + +err_unregister_gpu_sensor: + thermal_zone_of_sensor_unregister(&pdev->dev, thermal->sensors[1].tzd); +err_unregister_cpu_sensor: + thermal_zone_of_sensor_unregister(&pdev->dev, thermal->sensors[0].tzd); +err_disable_pclk: + clk_disable_unprepare(thermal->pclk); +err_disable_clk: + clk_disable_unprepare(thermal->clk); + + return error; +} + +static int rockchip_thermal_remove(struct platform_device *pdev) +{ + struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev); + int i; + + for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) { + struct rockchip_thermal_sensor *sensor = &thermal->sensors[i]; + + rockchip_thermal_toggle_sensor(sensor, false); + thermal_zone_of_sensor_unregister(&pdev->dev, sensor->tzd); + } + + thermal->chip->control(thermal->regs, false); + + clk_disable_unprepare(thermal->pclk); + clk_disable_unprepare(thermal->clk); + + return 0; +} + +static int __maybe_unused rockchip_thermal_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev); + int i; + + for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) + rockchip_thermal_toggle_sensor(&thermal->sensors[i], false); + + thermal->chip->control(thermal->regs, false); + + clk_disable(thermal->pclk); + clk_disable(thermal->clk); + + return 0; +} + +static int __maybe_unused rockchip_thermal_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev); + int i; + int error; + + error = clk_enable(thermal->clk); + if (error) + return error; + + error = clk_enable(thermal->pclk); + if (error) + return error; + + rockchip_thermal_reset_controller(thermal->reset); + + thermal->chip->initialize(thermal->regs, thermal->tshut_polarity); + + for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) { + enum sensor_id id = thermal->sensors[i].id; + + thermal->chip->set_tshut_mode(id, thermal->regs, + thermal->tshut_mode); + thermal->chip->set_tshut_temp(id, thermal->regs, + thermal->tshut_temp); + } + + thermal->chip->control(thermal->regs, true); + + for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) + rockchip_thermal_toggle_sensor(&thermal->sensors[i], true); + + return 0; +} + +static SIMPLE_DEV_PM_OPS(rockchip_thermal_pm_ops, + rockchip_thermal_suspend, rockchip_thermal_resume); + +static struct platform_driver rockchip_thermal_driver = { + .driver = { + .name = "rockchip-thermal", + .owner = THIS_MODULE, + .pm = &rockchip_thermal_pm_ops, + .of_match_table = of_rockchip_thermal_match, + }, + .probe = rockchip_thermal_probe, + .remove = rockchip_thermal_remove, +}; + +module_platform_driver(rockchip_thermal_driver); + +MODULE_DESCRIPTION("ROCKCHIP THERMAL Driver"); +MODULE_AUTHOR("Rockchip, Inc."); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:rockchip-thermal"); |