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Signed-off-by: Pengfei Li Signed-off-by: Frank Li --- .../devicetree/bindings/thermal/fsl,imx91-tmu.yaml | 65 ++++++++++++++++++++++ 1 file changed, 65 insertions(+) diff --git a/Documentation/devicetree/bindings/thermal/fsl,imx91-tmu.yaml b/Documentation/devicetree/bindings/thermal/fsl,imx91-tmu.yaml new file mode 100644 index 0000000000000..f5898db1006c6 --- /dev/null +++ b/Documentation/devicetree/bindings/thermal/fsl,imx91-tmu.yaml @@ -0,0 +1,65 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/thermal/fsl,imx91-tmu.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: NXP i.MX91 Thermal + +maintainers: + - Pengfei Li + +description: + i.MX91 features a new temperature sensor. It includes programmable + temperature threshold comparators for both normal and privileged + accesses and allows a programmable measurement frequency for the + Periodic One-Shot Measurement mode. Additionally, it provides + status registers for indicating the end of measurement and threshold + violation events. + +properties: + compatible: + items: + - const: fsl,imx91-tmu + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + + nvmem-cells: + items: + - description: Phandle to the trim control 1 provided by ocotp + - description: Phandle to the trim control 2 provided by ocotp + + nvmem-cell-names: + items: + - const: trim1 + - const: trim2 + + "#thermal-sensor-cells": + enum: [0, 1] + +required: + - compatible + - reg + - clocks + - '#thermal-sensor-cells' + +additionalProperties: false + +examples: + - | + #include + + thermal-sensor@44482000 { + compatible = "fsl,imx91-tmu"; + reg = <0x44482000 0x1000>; + #thermal-sensor-cells = <0>; + clocks = <&clk IMX93_CLK_TMC_GATE>; + nvmem-cells = <&tmu_trim1>, <&tmu_trim2>; + nvmem-cell-names = "trim1", "trim2"; + }; + +... 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The register layout differs from other chips, necessitating the creation of a dedicated file for this. Signed-off-by: Pengfei Li Signed-off-by: Peng Fan Signed-off-by: Frank Li --- drivers/thermal/Kconfig | 10 ++ drivers/thermal/Makefile | 1 + drivers/thermal/imx91_thermal.c | 281 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 292 insertions(+) diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig index d3f9686e26e71..da403ed86aeb1 100644 --- a/drivers/thermal/Kconfig +++ b/drivers/thermal/Kconfig @@ -296,6 +296,16 @@ config IMX8MM_THERMAL cpufreq is used as the cooling device to throttle CPUs when the passive trip is crossed. +config IMX91_THERMAL + tristate "Temperature sensor driver for NXP i.MX91 SoC" + depends on ARCH_MXC || COMPILE_TEST + depends on OF + help + Support for Temperature sensor found on NXP i.MX91 SoC. + It supports one critical trip point and one passive trip point. The + cpufreq is used as the cooling device to throttle CPUs when the passive + trip is crossed. + config K3_THERMAL tristate "Texas Instruments K3 thermal support" depends on ARCH_K3 || COMPILE_TEST diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile index 9abf43a74f2bb..08da241e6a598 100644 --- a/drivers/thermal/Makefile +++ b/drivers/thermal/Makefile @@ -50,6 +50,7 @@ obj-$(CONFIG_ARMADA_THERMAL) += armada_thermal.o obj-$(CONFIG_IMX_THERMAL) += imx_thermal.o obj-$(CONFIG_IMX_SC_THERMAL) += imx_sc_thermal.o obj-$(CONFIG_IMX8MM_THERMAL) += imx8mm_thermal.o +obj-$(CONFIG_IMX91_THERMAL) += imx91_thermal.o obj-$(CONFIG_MAX77620_THERMAL) += max77620_thermal.o obj-$(CONFIG_QORIQ_THERMAL) += qoriq_thermal.o obj-$(CONFIG_DA9062_THERMAL) += da9062-thermal.o diff --git a/drivers/thermal/imx91_thermal.c b/drivers/thermal/imx91_thermal.c new file mode 100644 index 0000000000000..19c4dafe9c7a9 --- /dev/null +++ b/drivers/thermal/imx91_thermal.c @@ -0,0 +1,281 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2024 NXP. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define CTRL0 0x0 + +#define STAT0 0x10 +#define STAT0_DRDY0_IF_MASK BIT(16) + +#define DATA0 0x20 +#define DATA_INT_MASK GENMASK(14, 7) +#define DATA_FRAC_MASK GENMASK(6, 0) + +#define THR_CTRL01 0x30 +#define THR_CTRL23 0x40 + +#define CTRL1 0x200 +#define CTRL1_SET 0x204 +#define CTRL1_CLR 0x208 +#define CTRL1_EN BIT(31) +#define CTRL1_START BIT(30) +#define CTRL1_STOP BIT(29) +#define CTRL1_RES_MASK GENMASK(19, 18) +#define CTRL1_MEAS_MODE_MASK GENMASK(25, 24) + +#define PERIOD_CTRL 0x270 +#define MEAS_FREQ_MASK GENMASK(23, 0) + +#define REF_DIV 0x280 +#define DIV_EN BIT(31) +#define DIV_MASK GENMASK(23, 16) + +#define PUD_ST_CTRL 0x2B0 +#define PUDL_MASK GENMASK(23, 16) + +#define TRIM1 0x2E0 +#define TRIM2 0x2F0 + +#define TMU_TEMP_LOW_LIMIT -40000 +#define TMU_TEMP_HIGH_LIMIT 125000 + +#define DEFAULT_TRIM1_CONFIG 0xB561BC2DU +#define DEFAULT_TRIM2_CONFIG 0x65D4U + +struct tmu_sensor { + struct imx91_tmu *priv; + struct thermal_zone_device *tzd; +}; + +struct imx91_tmu { + void __iomem *base; + struct clk *clk; + struct device *dev; + struct tmu_sensor sensors; +}; + +static void imx91_tmu_start(struct imx91_tmu *tmu, bool start) +{ + if (start) + writel_relaxed(CTRL1_START, tmu->base + CTRL1_SET); + else + writel_relaxed(CTRL1_STOP, tmu->base + CTRL1_SET); +} + +static void imx91_tmu_enable(struct imx91_tmu *tmu, bool enable) +{ + if (enable) + writel_relaxed(CTRL1_EN, tmu->base + CTRL1_SET); + else + writel_relaxed(CTRL1_EN, tmu->base + CTRL1_CLR); +} + +static int imx91_tmu_get_temp(struct thermal_zone_device *tz, int *temp) +{ + struct tmu_sensor *sensor = thermal_zone_device_priv(tz); + struct imx91_tmu *tmu = sensor->priv; + int val; + int ret; + + ret = readl_relaxed_poll_timeout(tmu->base + STAT0, val, + val & STAT0_DRDY0_IF_MASK, 1000, + 40000); + if (ret) + return -EAGAIN; + + val = readl_relaxed(tmu->base + DATA0) & 0xffffU; + *temp = val * 1000L / 64L; + if (*temp < TMU_TEMP_LOW_LIMIT || *temp > TMU_TEMP_HIGH_LIMIT) + return -EAGAIN; + + return 0; +} + +static struct thermal_zone_device_ops tmu_tz_ops = { + .get_temp = imx91_tmu_get_temp, +}; + +static int imx91_init_from_nvmem_cells(struct imx91_tmu *tmu) +{ + struct device *dev = tmu->dev; + int ret; + u32 trim1, trim2; + + ret = nvmem_cell_read_u32(dev, "trim1", &trim1); + if (ret) + return ret; + + ret = nvmem_cell_read_u32(dev, "trim2", &trim2); + if (ret) + return ret; + + if (trim1 == 0 || trim2 == 0) + return -EINVAL; + + writel_relaxed(trim1, tmu->base + TRIM1); + writel_relaxed(trim2, tmu->base + TRIM2); + + return 0; +} + +static int imx91_tmu_probe(struct platform_device *pdev) +{ + struct imx91_tmu *tmu; + unsigned long rate; + u32 div; + int ret; + int i = 0; + + tmu = devm_kzalloc(&pdev->dev, sizeof(struct imx91_tmu), GFP_KERNEL); + if (!tmu) + return -ENOMEM; + + tmu->dev = &pdev->dev; + + tmu->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(tmu->base)) + return PTR_ERR(tmu->base); + + tmu->clk = devm_clk_get_prepared(&pdev->dev, NULL); + if (IS_ERR(tmu->clk)) + return dev_err_probe(&pdev->dev, PTR_ERR(tmu->clk), "failed to get tmu clock\n"); + + tmu->sensors.priv = tmu; + tmu->sensors.tzd = devm_thermal_of_zone_register(&pdev->dev, i, &tmu->sensors, &tmu_tz_ops); + if (IS_ERR(tmu->sensors.tzd)) + return dev_err_probe(&pdev->dev, PTR_ERR(tmu->sensors.tzd), + "failed to register thermal zone sensor\n"); + + platform_set_drvdata(pdev, tmu); + + /* disable the monitor during initialization */ + imx91_tmu_enable(tmu, false); + imx91_tmu_start(tmu, false); + + ret = imx91_init_from_nvmem_cells(tmu); + if (ret) { + writel_relaxed(DEFAULT_TRIM1_CONFIG, tmu->base + TRIM1); + writel_relaxed(DEFAULT_TRIM2_CONFIG, tmu->base + TRIM2); + } + + /* The typical conv clk is 4MHz, the output freq is 'rate / (div + 1)' */ + rate = clk_get_rate(tmu->clk); + div = (rate / 4000000) - 1; + + /* Set divider value and enable divider */ + writel_relaxed(DIV_EN | FIELD_PREP(DIV_MASK, div), tmu->base + REF_DIV); + + /* Set max power up delay: 'Tpud(ms) = 0xFF * 1000 / 4000000' */ + writel_relaxed(FIELD_PREP(PUDL_MASK, 100U), tmu->base + PUD_ST_CTRL); + + /* + * Set resolution mode + * 00b - Conversion time = 0.59325 ms + * 01b - Conversion time = 1.10525 ms + * 10b - Conversion time = 2.12925 ms + * 11b - Conversion time = 4.17725 ms + */ + writel_relaxed(FIELD_PREP(CTRL1_RES_MASK, 0x3), tmu->base + CTRL1_CLR); + writel_relaxed(FIELD_PREP(CTRL1_RES_MASK, 0x1), tmu->base + CTRL1_SET); + + /* + * Set measure mode + * 00b - Single oneshot measurement + * 01b - Continuous measurement + * 10b - Periodic oneshot measurement + */ + writel_relaxed(FIELD_PREP(CTRL1_MEAS_MODE_MASK, 0x3), tmu->base + CTRL1_CLR); + writel_relaxed(FIELD_PREP(CTRL1_MEAS_MODE_MASK, 0x1), tmu->base + CTRL1_SET); + + /* + * Set Periodic Measurement Frequency to 25Hz: + * tMEAS_FREQ = tCONV_CLK * PERIOD_CTRL[MEAS_FREQ]. -> + * PERIOD_CTRL(MEAS_FREQ) = (1000 / 25) / (1000 / 4000000); + * Where tMEAS_FREQ = Measurement period and tCONV_CLK = 1/fCONV_CLK. + * This field should have value greater than count corresponds + * to time greater than summation of conversion time, power up + * delay, and six times of conversion clock time. + * tMEAS_FREQ > (tCONV + tPUD + 6 * tCONV_CLK). + * tCONV is conversion time determined by CTRL1[RESOLUTION]. + */ + writel_relaxed(FIELD_PREP(MEAS_FREQ_MASK, 0x27100), tmu->base + PERIOD_CTRL); + + /* enable the monitor */ + imx91_tmu_enable(tmu, true); + imx91_tmu_start(tmu, true); + + return 0; +} + +static void imx91_tmu_remove(struct platform_device *pdev) +{ + struct imx91_tmu *tmu = platform_get_drvdata(pdev); + + /* disable tmu */ + imx91_tmu_start(tmu, false); + imx91_tmu_enable(tmu, false); +} + +static int __maybe_unused imx91_tmu_suspend(struct device *dev) +{ + struct imx91_tmu *tmu = dev_get_drvdata(dev); + + /* disable tmu */ + imx91_tmu_start(tmu, false); + imx91_tmu_enable(tmu, false); + + clk_disable_unprepare(tmu->clk); + + return 0; +} + +static int __maybe_unused imx91_tmu_resume(struct device *dev) +{ + struct imx91_tmu *tmu = dev_get_drvdata(dev); + int ret; + + ret = clk_prepare_enable(tmu->clk); + if (ret) + return ret; + + imx91_tmu_enable(tmu, true); + imx91_tmu_start(tmu, true); + + return 0; +} + +static SIMPLE_DEV_PM_OPS(imx91_tmu_pm_ops, + imx91_tmu_suspend, imx91_tmu_resume); + +static const struct of_device_id imx91_tmu_table[] = { + { .compatible = "fsl,imx91-tmu", }, + { }, +}; +MODULE_DEVICE_TABLE(of, imx91_tmu_table); + +static struct platform_driver imx91_tmu = { + .driver = { + .name = "i.MX91_thermal", + .pm = pm_ptr(&imx91_tmu_pm_ops), + .of_match_table = imx91_tmu_table, + }, + .probe = imx91_tmu_probe, + .remove = imx91_tmu_remove, +}; +module_platform_driver(imx91_tmu); + +MODULE_AUTHOR("Peng Fan "); +MODULE_DESCRIPTION("i.MX91 Thermal Monitor Unit driver"); +MODULE_LICENSE("GPL");