| Message ID | 20190927184352.28759-3-glaroque@baylibre.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Add support of New Amlogic temperature sensor for G12 SoCs | expand |
On Sat, Sep 28, 2019 at 12:14 AM Guillaume La Roque <glaroque@baylibre.com> wrote: > > Amlogic G12A and G12B SoCs integrate two thermal sensors > with the same design. One is located close to the DDR controller > and the other one is located close to the PLLs (between the CPU and GPU). > > The calibration data for each of the thermal sensors instance is stored > in a different location within the AO region. > > Implement reading the temperature from each thermal sensor. > > The IP block has more functionality, which may be added to this driver > in the future: > - chip reset when the temperature exceeds a configurable threshold > - up to four interrupts when the temperature has risen above a > configurable threshold > - up to four interrupts when the temperature has fallen below a > configurable threshold > > Tested-by: Christian Hewitt <christianshewitt@gmail.com> > Tested-by: Kevin Hilman <khilman@baylibre.com> > Signed-off-by: Guillaume La Roque <glaroque@baylibre.com> Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org> > --- > drivers/thermal/Kconfig | 11 + > drivers/thermal/Makefile | 1 + > drivers/thermal/amlogic_thermal.c | 333 ++++++++++++++++++++++++++++++ > 3 files changed, 345 insertions(+) > create mode 100644 drivers/thermal/amlogic_thermal.c > > diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig > index 9966364a6deb..0f31bb4bc372 100644 > --- a/drivers/thermal/Kconfig > +++ b/drivers/thermal/Kconfig > @@ -348,6 +348,17 @@ config MTK_THERMAL > Enable this option if you want to have support for thermal management > controller present in Mediatek SoCs > > +config AMLOGIC_THERMAL > + tristate "Amlogic Thermal Support" > + default ARCH_MESON > + depends on OF && ARCH_MESON > + help > + If you say yes here you get support for Amlogic Thermal > + for G12 SoC Family. > + > + This driver can also be built as a module. If so, the module will > + be called amlogic_thermal. > + > menu "Intel thermal drivers" > depends on X86 || X86_INTEL_QUARK || COMPILE_TEST > source "drivers/thermal/intel/Kconfig" > diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile > index 74a37c7f847a..baeb70bf0568 100644 > --- a/drivers/thermal/Makefile > +++ b/drivers/thermal/Makefile > @@ -54,3 +54,4 @@ obj-$(CONFIG_MTK_THERMAL) += mtk_thermal.o > obj-$(CONFIG_GENERIC_ADC_THERMAL) += thermal-generic-adc.o > obj-$(CONFIG_ZX2967_THERMAL) += zx2967_thermal.o > obj-$(CONFIG_UNIPHIER_THERMAL) += uniphier_thermal.o > +obj-$(CONFIG_AMLOGIC_THERMAL) += amlogic_thermal.o > diff --git a/drivers/thermal/amlogic_thermal.c b/drivers/thermal/amlogic_thermal.c > new file mode 100644 > index 000000000000..8a9e9bc421c6 > --- /dev/null > +++ b/drivers/thermal/amlogic_thermal.c > @@ -0,0 +1,333 @@ > +// SPDX-License-Identifier: GPL-2.0+ > +/* > + * Amlogic Thermal Sensor Driver > + * > + * Copyright (C) 2017 Huan Biao <huan.biao@amlogic.com> > + * Copyright (C) 2019 Guillaume La Roque <glaroque@baylibre.com> > + * > + * Register value to celsius temperature formulas: > + * Read_Val m * U > + * U = ---------, Uptat = --------- > + * 2^16 1 + n * U > + * > + * Temperature = A * ( Uptat + u_efuse / 2^16 )- B > + * > + * A B m n : calibration parameters > + * u_efuse : fused calibration value, it's a signed 16 bits value > + */ > + > +#include <linux/bitfield.h> > +#include <linux/clk.h> > +#include <linux/io.h> > +#include <linux/mfd/syscon.h> > +#include <linux/module.h> > +#include <linux/of.h> > +#include <linux/of_address.h> > +#include <linux/of_device.h> > +#include <linux/platform_device.h> > +#include <linux/regmap.h> > +#include <linux/thermal.h> > + > +#include "thermal_core.h" > + > +#define TSENSOR_CFG_REG1 0x4 > + #define TSENSOR_CFG_REG1_RSET_VBG BIT(12) > + #define TSENSOR_CFG_REG1_RSET_ADC BIT(11) > + #define TSENSOR_CFG_REG1_VCM_EN BIT(10) > + #define TSENSOR_CFG_REG1_VBG_EN BIT(9) > + #define TSENSOR_CFG_REG1_OUT_CTL BIT(6) > + #define TSENSOR_CFG_REG1_FILTER_EN BIT(5) > + #define TSENSOR_CFG_REG1_DEM_EN BIT(3) > + #define TSENSOR_CFG_REG1_CH_SEL GENMASK(1, 0) > + #define TSENSOR_CFG_REG1_ENABLE \ > + (TSENSOR_CFG_REG1_FILTER_EN | \ > + TSENSOR_CFG_REG1_VCM_EN | \ > + TSENSOR_CFG_REG1_VBG_EN | \ > + TSENSOR_CFG_REG1_DEM_EN | \ > + TSENSOR_CFG_REG1_CH_SEL) > + > +#define TSENSOR_STAT0 0x40 > + > +#define TSENSOR_STAT9 0x64 > + > +#define TSENSOR_READ_TEMP_MASK GENMASK(15, 0) > +#define TSENSOR_TEMP_MASK GENMASK(11, 0) > + > +#define TSENSOR_TRIM_SIGN_MASK BIT(15) > +#define TSENSOR_TRIM_TEMP_MASK GENMASK(14, 0) > +#define TSENSOR_TRIM_VERSION_MASK GENMASK(31, 24) > + > +#define TSENSOR_TRIM_VERSION(_version) \ > + FIELD_GET(TSENSOR_TRIM_VERSION_MASK, _version) > + > +#define TSENSOR_TRIM_CALIB_VALID_MASK (GENMASK(3, 2) | BIT(7)) > + > +#define TSENSOR_CALIB_OFFSET 1 > +#define TSENSOR_CALIB_SHIFT 4 > + > +/** > + * struct amlogic_thermal_soc_calib_data > + * @A, B, m, n: calibration parameters > + * This structure is required for configuration of amlogic thermal driver. > + */ > +struct amlogic_thermal_soc_calib_data { > + int A; > + int B; > + int m; > + int n; > +}; > + > +/** > + * struct amlogic_thermal_data > + * @u_efuse_off: register offset to read fused calibration value > + * @calibration_parameters: calibration parameters structure pointer > + * @regmap_config: regmap config for the device > + * This structure is required for configuration of amlogic thermal driver. > + */ > +struct amlogic_thermal_data { > + int u_efuse_off; > + const struct amlogic_thermal_soc_calib_data *calibration_parameters; > + const struct regmap_config *regmap_config; > +}; > + > +struct amlogic_thermal { > + struct platform_device *pdev; > + const struct amlogic_thermal_data *data; > + struct regmap *regmap; > + struct regmap *sec_ao_map; > + struct clk *clk; > + struct thermal_zone_device *tzd; > + u32 trim_info; > +}; > + > +/* > + * Calculate a temperature value from a temperature code. > + * The unit of the temperature is degree milliCelsius. > + */ > +static int amlogic_thermal_code_to_millicelsius(struct amlogic_thermal *pdata, > + int temp_code) > +{ > + const struct amlogic_thermal_soc_calib_data *param = > + pdata->data->calibration_parameters; > + int temp; > + s64 factor, Uptat, uefuse; > + > + uefuse = pdata->trim_info & TSENSOR_TRIM_SIGN_MASK ? > + ~(pdata->trim_info & TSENSOR_TRIM_TEMP_MASK) + 1 : > + (pdata->trim_info & TSENSOR_TRIM_TEMP_MASK); > + > + factor = param->n * temp_code; > + factor = div_s64(factor, 100); > + > + Uptat = temp_code * param->m; > + Uptat = div_s64(Uptat, 100); > + Uptat = Uptat * BIT(16); > + Uptat = div_s64(Uptat, BIT(16) + factor); > + > + temp = (Uptat + uefuse) * param->A; > + temp = div_s64(temp, BIT(16)); > + temp = (temp - param->B) * 100; > + > + return temp; > +} > + > +static int amlogic_thermal_initialize(struct amlogic_thermal *pdata) > +{ > + int ret = 0; > + int ver; > + > + regmap_read(pdata->sec_ao_map, pdata->data->u_efuse_off, > + &pdata->trim_info); > + > + ver = TSENSOR_TRIM_VERSION(pdata->trim_info); > + > + if ((ver & TSENSOR_TRIM_CALIB_VALID_MASK) == 0) { > + ret = -EINVAL; > + dev_err(&pdata->pdev->dev, > + "tsensor thermal calibration not supported: 0x%x!\n", > + ver); > + } > + > + return ret; > +} > + > +static int amlogic_thermal_enable(struct amlogic_thermal *data) > +{ > + int ret; > + > + ret = clk_prepare_enable(data->clk); > + if (ret) > + return ret; > + > + regmap_update_bits(data->regmap, TSENSOR_CFG_REG1, > + TSENSOR_CFG_REG1_ENABLE, TSENSOR_CFG_REG1_ENABLE); > + > + return 0; > +} > + > +static int amlogic_thermal_disable(struct amlogic_thermal *data) > +{ > + regmap_update_bits(data->regmap, TSENSOR_CFG_REG1, > + TSENSOR_CFG_REG1_ENABLE, 0); > + clk_disable_unprepare(data->clk); > + > + return 0; > +} > + > +static int amlogic_thermal_get_temp(void *data, int *temp) > +{ > + unsigned int tval; > + struct amlogic_thermal *pdata = data; > + > + if (!data) > + return -EINVAL; > + > + regmap_read(pdata->regmap, TSENSOR_STAT0, &tval); > + *temp = > + amlogic_thermal_code_to_millicelsius(pdata, > + tval & TSENSOR_READ_TEMP_MASK); > + > + return 0; > +} > + > +static const struct thermal_zone_of_device_ops amlogic_thermal_ops = { > + .get_temp = amlogic_thermal_get_temp, > +}; > + > +static const struct regmap_config amlogic_thermal_regmap_config_g12a = { > + .reg_bits = 8, > + .val_bits = 32, > + .reg_stride = 4, > + .max_register = TSENSOR_STAT9, > +}; > + > +static const struct amlogic_thermal_soc_calib_data amlogic_thermal_g12a = { > + .A = 9411, > + .B = 3159, > + .m = 424, > + .n = 324, > +}; > + > +static const struct amlogic_thermal_data amlogic_thermal_g12a_cpu_param = { > + .u_efuse_off = 0x128, > + .calibration_parameters = &amlogic_thermal_g12a, > + .regmap_config = &amlogic_thermal_regmap_config_g12a, > +}; > + > +static const struct amlogic_thermal_data amlogic_thermal_g12a_ddr_param = { > + .u_efuse_off = 0xf0, > + .calibration_parameters = &amlogic_thermal_g12a, > + .regmap_config = &amlogic_thermal_regmap_config_g12a, > +}; > + > +static const struct of_device_id of_amlogic_thermal_match[] = { > + { > + .compatible = "amlogic,g12a-ddr-thermal", > + .data = &amlogic_thermal_g12a_ddr_param, > + }, > + { > + .compatible = "amlogic,g12a-cpu-thermal", > + .data = &amlogic_thermal_g12a_cpu_param, > + }, > + { /* sentinel */ } > +}; > +MODULE_DEVICE_TABLE(of, of_amlogic_thermal_match); > + > +static int amlogic_thermal_probe(struct platform_device *pdev) > +{ > + struct amlogic_thermal *pdata; > + struct device *dev = &pdev->dev; > + void __iomem *base; > + int ret; > + > + pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); > + if (!pdata) > + return -ENOMEM; > + > + pdata->data = of_device_get_match_data(dev); > + pdata->pdev = pdev; > + platform_set_drvdata(pdev, pdata); > + > + base = devm_platform_ioremap_resource(pdev, 0); > + if (IS_ERR(base)) { > + dev_err(dev, "failed to get io address\n"); > + return PTR_ERR(base); > + } > + > + pdata->regmap = devm_regmap_init_mmio(dev, base, > + pdata->data->regmap_config); > + if (IS_ERR(pdata->regmap)) > + return PTR_ERR(pdata->regmap); > + > + pdata->clk = devm_clk_get(dev, NULL); > + if (IS_ERR(pdata->clk)) { > + if (PTR_ERR(pdata->clk) != -EPROBE_DEFER) > + dev_err(dev, "failed to get clock\n"); > + return PTR_ERR(pdata->clk); > + } > + > + pdata->sec_ao_map = syscon_regmap_lookup_by_phandle > + (pdev->dev.of_node, "amlogic,ao-secure"); > + if (IS_ERR(pdata->sec_ao_map)) { > + dev_err(dev, "syscon regmap lookup failed.\n"); > + return PTR_ERR(pdata->sec_ao_map); > + } > + > + pdata->tzd = devm_thermal_zone_of_sensor_register(&pdev->dev, > + 0, > + pdata, > + &amlogic_thermal_ops); > + if (IS_ERR(pdata->tzd)) { > + ret = PTR_ERR(pdata->tzd); > + dev_err(dev, "Failed to register tsensor: %d\n", ret); > + return ret; > + } > + > + ret = amlogic_thermal_initialize(pdata); > + if (ret) > + return ret; > + > + ret = amlogic_thermal_enable(pdata); > + > + return ret; > +} > + > +static int amlogic_thermal_remove(struct platform_device *pdev) > +{ > + struct amlogic_thermal *data = platform_get_drvdata(pdev); > + > + return amlogic_thermal_disable(data); > +} > + > +static int __maybe_unused amlogic_thermal_suspend(struct device *dev) > +{ > + struct amlogic_thermal *data = dev_get_drvdata(dev); > + > + return amlogic_thermal_disable(data); > +} > + > +static int __maybe_unused amlogic_thermal_resume(struct device *dev) > +{ > + struct amlogic_thermal *data = dev_get_drvdata(dev); > + > + return amlogic_thermal_enable(data); > +} > + > +static SIMPLE_DEV_PM_OPS(amlogic_thermal_pm_ops, > + amlogic_thermal_suspend, amlogic_thermal_resume); > + > +static struct platform_driver amlogic_thermal_driver = { > + .driver = { > + .name = "amlogic_thermal", > + .pm = &amlogic_thermal_pm_ops, > + .of_match_table = of_amlogic_thermal_match, > + }, > + .probe = amlogic_thermal_probe, > + .remove = amlogic_thermal_remove, > +}; > + > +module_platform_driver(amlogic_thermal_driver); > + > +MODULE_AUTHOR("Guillaume La Roque <glaroque@baylibre.com>"); > +MODULE_DESCRIPTION("Amlogic thermal driver"); > +MODULE_LICENSE("GPL v2"); > -- > 2.17.1 >
diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig index 9966364a6deb..0f31bb4bc372 100644 --- a/drivers/thermal/Kconfig +++ b/drivers/thermal/Kconfig @@ -348,6 +348,17 @@ config MTK_THERMAL Enable this option if you want to have support for thermal management controller present in Mediatek SoCs +config AMLOGIC_THERMAL + tristate "Amlogic Thermal Support" + default ARCH_MESON + depends on OF && ARCH_MESON + help + If you say yes here you get support for Amlogic Thermal + for G12 SoC Family. + + This driver can also be built as a module. If so, the module will + be called amlogic_thermal. + menu "Intel thermal drivers" depends on X86 || X86_INTEL_QUARK || COMPILE_TEST source "drivers/thermal/intel/Kconfig" diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile index 74a37c7f847a..baeb70bf0568 100644 --- a/drivers/thermal/Makefile +++ b/drivers/thermal/Makefile @@ -54,3 +54,4 @@ obj-$(CONFIG_MTK_THERMAL) += mtk_thermal.o obj-$(CONFIG_GENERIC_ADC_THERMAL) += thermal-generic-adc.o obj-$(CONFIG_ZX2967_THERMAL) += zx2967_thermal.o obj-$(CONFIG_UNIPHIER_THERMAL) += uniphier_thermal.o +obj-$(CONFIG_AMLOGIC_THERMAL) += amlogic_thermal.o diff --git a/drivers/thermal/amlogic_thermal.c b/drivers/thermal/amlogic_thermal.c new file mode 100644 index 000000000000..8a9e9bc421c6 --- /dev/null +++ b/drivers/thermal/amlogic_thermal.c @@ -0,0 +1,333 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Amlogic Thermal Sensor Driver + * + * Copyright (C) 2017 Huan Biao <huan.biao@amlogic.com> + * Copyright (C) 2019 Guillaume La Roque <glaroque@baylibre.com> + * + * Register value to celsius temperature formulas: + * Read_Val m * U + * U = ---------, Uptat = --------- + * 2^16 1 + n * U + * + * Temperature = A * ( Uptat + u_efuse / 2^16 )- B + * + * A B m n : calibration parameters + * u_efuse : fused calibration value, it's a signed 16 bits value + */ + +#include <linux/bitfield.h> +#include <linux/clk.h> +#include <linux/io.h> +#include <linux/mfd/syscon.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/thermal.h> + +#include "thermal_core.h" + +#define TSENSOR_CFG_REG1 0x4 + #define TSENSOR_CFG_REG1_RSET_VBG BIT(12) + #define TSENSOR_CFG_REG1_RSET_ADC BIT(11) + #define TSENSOR_CFG_REG1_VCM_EN BIT(10) + #define TSENSOR_CFG_REG1_VBG_EN BIT(9) + #define TSENSOR_CFG_REG1_OUT_CTL BIT(6) + #define TSENSOR_CFG_REG1_FILTER_EN BIT(5) + #define TSENSOR_CFG_REG1_DEM_EN BIT(3) + #define TSENSOR_CFG_REG1_CH_SEL GENMASK(1, 0) + #define TSENSOR_CFG_REG1_ENABLE \ + (TSENSOR_CFG_REG1_FILTER_EN | \ + TSENSOR_CFG_REG1_VCM_EN | \ + TSENSOR_CFG_REG1_VBG_EN | \ + TSENSOR_CFG_REG1_DEM_EN | \ + TSENSOR_CFG_REG1_CH_SEL) + +#define TSENSOR_STAT0 0x40 + +#define TSENSOR_STAT9 0x64 + +#define TSENSOR_READ_TEMP_MASK GENMASK(15, 0) +#define TSENSOR_TEMP_MASK GENMASK(11, 0) + +#define TSENSOR_TRIM_SIGN_MASK BIT(15) +#define TSENSOR_TRIM_TEMP_MASK GENMASK(14, 0) +#define TSENSOR_TRIM_VERSION_MASK GENMASK(31, 24) + +#define TSENSOR_TRIM_VERSION(_version) \ + FIELD_GET(TSENSOR_TRIM_VERSION_MASK, _version) + +#define TSENSOR_TRIM_CALIB_VALID_MASK (GENMASK(3, 2) | BIT(7)) + +#define TSENSOR_CALIB_OFFSET 1 +#define TSENSOR_CALIB_SHIFT 4 + +/** + * struct amlogic_thermal_soc_calib_data + * @A, B, m, n: calibration parameters + * This structure is required for configuration of amlogic thermal driver. + */ +struct amlogic_thermal_soc_calib_data { + int A; + int B; + int m; + int n; +}; + +/** + * struct amlogic_thermal_data + * @u_efuse_off: register offset to read fused calibration value + * @calibration_parameters: calibration parameters structure pointer + * @regmap_config: regmap config for the device + * This structure is required for configuration of amlogic thermal driver. + */ +struct amlogic_thermal_data { + int u_efuse_off; + const struct amlogic_thermal_soc_calib_data *calibration_parameters; + const struct regmap_config *regmap_config; +}; + +struct amlogic_thermal { + struct platform_device *pdev; + const struct amlogic_thermal_data *data; + struct regmap *regmap; + struct regmap *sec_ao_map; + struct clk *clk; + struct thermal_zone_device *tzd; + u32 trim_info; +}; + +/* + * Calculate a temperature value from a temperature code. + * The unit of the temperature is degree milliCelsius. + */ +static int amlogic_thermal_code_to_millicelsius(struct amlogic_thermal *pdata, + int temp_code) +{ + const struct amlogic_thermal_soc_calib_data *param = + pdata->data->calibration_parameters; + int temp; + s64 factor, Uptat, uefuse; + + uefuse = pdata->trim_info & TSENSOR_TRIM_SIGN_MASK ? + ~(pdata->trim_info & TSENSOR_TRIM_TEMP_MASK) + 1 : + (pdata->trim_info & TSENSOR_TRIM_TEMP_MASK); + + factor = param->n * temp_code; + factor = div_s64(factor, 100); + + Uptat = temp_code * param->m; + Uptat = div_s64(Uptat, 100); + Uptat = Uptat * BIT(16); + Uptat = div_s64(Uptat, BIT(16) + factor); + + temp = (Uptat + uefuse) * param->A; + temp = div_s64(temp, BIT(16)); + temp = (temp - param->B) * 100; + + return temp; +} + +static int amlogic_thermal_initialize(struct amlogic_thermal *pdata) +{ + int ret = 0; + int ver; + + regmap_read(pdata->sec_ao_map, pdata->data->u_efuse_off, + &pdata->trim_info); + + ver = TSENSOR_TRIM_VERSION(pdata->trim_info); + + if ((ver & TSENSOR_TRIM_CALIB_VALID_MASK) == 0) { + ret = -EINVAL; + dev_err(&pdata->pdev->dev, + "tsensor thermal calibration not supported: 0x%x!\n", + ver); + } + + return ret; +} + +static int amlogic_thermal_enable(struct amlogic_thermal *data) +{ + int ret; + + ret = clk_prepare_enable(data->clk); + if (ret) + return ret; + + regmap_update_bits(data->regmap, TSENSOR_CFG_REG1, + TSENSOR_CFG_REG1_ENABLE, TSENSOR_CFG_REG1_ENABLE); + + return 0; +} + +static int amlogic_thermal_disable(struct amlogic_thermal *data) +{ + regmap_update_bits(data->regmap, TSENSOR_CFG_REG1, + TSENSOR_CFG_REG1_ENABLE, 0); + clk_disable_unprepare(data->clk); + + return 0; +} + +static int amlogic_thermal_get_temp(void *data, int *temp) +{ + unsigned int tval; + struct amlogic_thermal *pdata = data; + + if (!data) + return -EINVAL; + + regmap_read(pdata->regmap, TSENSOR_STAT0, &tval); + *temp = + amlogic_thermal_code_to_millicelsius(pdata, + tval & TSENSOR_READ_TEMP_MASK); + + return 0; +} + +static const struct thermal_zone_of_device_ops amlogic_thermal_ops = { + .get_temp = amlogic_thermal_get_temp, +}; + +static const struct regmap_config amlogic_thermal_regmap_config_g12a = { + .reg_bits = 8, + .val_bits = 32, + .reg_stride = 4, + .max_register = TSENSOR_STAT9, +}; + +static const struct amlogic_thermal_soc_calib_data amlogic_thermal_g12a = { + .A = 9411, + .B = 3159, + .m = 424, + .n = 324, +}; + +static const struct amlogic_thermal_data amlogic_thermal_g12a_cpu_param = { + .u_efuse_off = 0x128, + .calibration_parameters = &amlogic_thermal_g12a, + .regmap_config = &amlogic_thermal_regmap_config_g12a, +}; + +static const struct amlogic_thermal_data amlogic_thermal_g12a_ddr_param = { + .u_efuse_off = 0xf0, + .calibration_parameters = &amlogic_thermal_g12a, + .regmap_config = &amlogic_thermal_regmap_config_g12a, +}; + +static const struct of_device_id of_amlogic_thermal_match[] = { + { + .compatible = "amlogic,g12a-ddr-thermal", + .data = &amlogic_thermal_g12a_ddr_param, + }, + { + .compatible = "amlogic,g12a-cpu-thermal", + .data = &amlogic_thermal_g12a_cpu_param, + }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, of_amlogic_thermal_match); + +static int amlogic_thermal_probe(struct platform_device *pdev) +{ + struct amlogic_thermal *pdata; + struct device *dev = &pdev->dev; + void __iomem *base; + int ret; + + pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return -ENOMEM; + + pdata->data = of_device_get_match_data(dev); + pdata->pdev = pdev; + platform_set_drvdata(pdev, pdata); + + base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(base)) { + dev_err(dev, "failed to get io address\n"); + return PTR_ERR(base); + } + + pdata->regmap = devm_regmap_init_mmio(dev, base, + pdata->data->regmap_config); + if (IS_ERR(pdata->regmap)) + return PTR_ERR(pdata->regmap); + + pdata->clk = devm_clk_get(dev, NULL); + if (IS_ERR(pdata->clk)) { + if (PTR_ERR(pdata->clk) != -EPROBE_DEFER) + dev_err(dev, "failed to get clock\n"); + return PTR_ERR(pdata->clk); + } + + pdata->sec_ao_map = syscon_regmap_lookup_by_phandle + (pdev->dev.of_node, "amlogic,ao-secure"); + if (IS_ERR(pdata->sec_ao_map)) { + dev_err(dev, "syscon regmap lookup failed.\n"); + return PTR_ERR(pdata->sec_ao_map); + } + + pdata->tzd = devm_thermal_zone_of_sensor_register(&pdev->dev, + 0, + pdata, + &amlogic_thermal_ops); + if (IS_ERR(pdata->tzd)) { + ret = PTR_ERR(pdata->tzd); + dev_err(dev, "Failed to register tsensor: %d\n", ret); + return ret; + } + + ret = amlogic_thermal_initialize(pdata); + if (ret) + return ret; + + ret = amlogic_thermal_enable(pdata); + + return ret; +} + +static int amlogic_thermal_remove(struct platform_device *pdev) +{ + struct amlogic_thermal *data = platform_get_drvdata(pdev); + + return amlogic_thermal_disable(data); +} + +static int __maybe_unused amlogic_thermal_suspend(struct device *dev) +{ + struct amlogic_thermal *data = dev_get_drvdata(dev); + + return amlogic_thermal_disable(data); +} + +static int __maybe_unused amlogic_thermal_resume(struct device *dev) +{ + struct amlogic_thermal *data = dev_get_drvdata(dev); + + return amlogic_thermal_enable(data); +} + +static SIMPLE_DEV_PM_OPS(amlogic_thermal_pm_ops, + amlogic_thermal_suspend, amlogic_thermal_resume); + +static struct platform_driver amlogic_thermal_driver = { + .driver = { + .name = "amlogic_thermal", + .pm = &amlogic_thermal_pm_ops, + .of_match_table = of_amlogic_thermal_match, + }, + .probe = amlogic_thermal_probe, + .remove = amlogic_thermal_remove, +}; + +module_platform_driver(amlogic_thermal_driver); + +MODULE_AUTHOR("Guillaume La Roque <glaroque@baylibre.com>"); +MODULE_DESCRIPTION("Amlogic thermal driver"); +MODULE_LICENSE("GPL v2");