This patch is a minimal port of the corresponding driver that can be found in Linux kernel (drivers/thermal/qoriq_thermal.c).
Signed-off-by: Andrey Smirnov <[email protected]> --- Changes since [v1]: - None [v1] http://lists.infradead.org/pipermail/barebox/2018-September/034789.html drivers/aiodev/Kconfig | 7 + drivers/aiodev/Makefile | 1 + drivers/aiodev/qoriq_thermal.c | 264 +++++++++++++++++++++++++++++++++ 3 files changed, 272 insertions(+) create mode 100644 drivers/aiodev/qoriq_thermal.c diff --git a/drivers/aiodev/Kconfig b/drivers/aiodev/Kconfig index 3eabd3b3f..7f1d0fd4a 100644 --- a/drivers/aiodev/Kconfig +++ b/drivers/aiodev/Kconfig @@ -16,6 +16,13 @@ config IMX_THERMAL Support for Temperature Monitor (TEMPMON) found on Freescale i.MX SoCs. +config QORIQ_THERMAL + tristate "QorIQ Thermal Monitoring Unit" + depends on ARCH_IMX8MQ + help + Support for Thermal Monitoring Unit (TMU) found on QorIQ and + i.MX8MQ platforms. + config LM75 tristate "LM75 driver" depends on I2C diff --git a/drivers/aiodev/Makefile b/drivers/aiodev/Makefile index 1dcf6cdc4..d5318deeb 100644 --- a/drivers/aiodev/Makefile +++ b/drivers/aiodev/Makefile @@ -3,3 +3,4 @@ obj-$(CONFIG_AIODEV) += core.o obj-$(CONFIG_IMX_THERMAL) += imx_thermal.o obj-$(CONFIG_LM75) += lm75.o obj-$(CONFIG_MC13XXX_ADC) += mc13xxx_adc.o +obj-$(CONFIG_QORIQ_THERMAL) += qoriq_thermal.o diff --git a/drivers/aiodev/qoriq_thermal.c b/drivers/aiodev/qoriq_thermal.c new file mode 100644 index 000000000..d29da02a6 --- /dev/null +++ b/drivers/aiodev/qoriq_thermal.c @@ -0,0 +1,264 @@ +/* + * Copyright 2016 Freescale Semiconductor, Inc. + * Copyright 2017 NXP. + * + * 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 <common.h> +#include <init.h> +#include <malloc.h> +#include <clock.h> +#include <driver.h> +#include <xfuncs.h> +#include <errno.h> +#include <io.h> +#include <aiodev.h> +#include <of_address.h> +#include <linux/clk.h> + +#define SITES_MAX 16 + +#define TMU_TEMP_PASSIVE_COOL_DELTA 10000 + +/* + * QorIQ TMU Registers + */ +struct qoriq_tmu_site_regs { + u32 tritsr; /* Immediate Temperature Site Register */ + u32 tratsr; /* Average Temperature Site Register */ + u8 res0[0x8]; +}; + +struct qoriq_tmu_regs { + u32 tmr; /* Mode Register */ +#define TMR_DISABLE 0x0 +#define TMR_ME 0x80000000 +#define TMR_ALPF 0x0c000000 + u32 tsr; /* Status Register */ + u32 tmtmir; /* Temperature measurement interval Register */ +#define TMTMIR_DEFAULT 0x0000000f + u8 res0[0x14]; + u32 tier; /* Interrupt Enable Register */ +#define TIER_DISABLE 0x0 + u32 tidr; /* Interrupt Detect Register */ + u32 tiscr; /* Interrupt Site Capture Register */ + u32 ticscr; /* Interrupt Critical Site Capture Register */ + u8 res1[0x10]; + u32 tmhtcrh; /* High Temperature Capture Register */ + u32 tmhtcrl; /* Low Temperature Capture Register */ + u8 res2[0x8]; + u32 tmhtitr; /* High Temperature Immediate Threshold */ + u32 tmhtatr; /* High Temperature Average Threshold */ + u32 tmhtactr; /* High Temperature Average Crit Threshold */ + u8 res3[0x24]; + u32 ttcfgr; /* Temperature Configuration Register */ + u32 tscfgr; /* Sensor Configuration Register */ + u8 res4[0x78]; + struct qoriq_tmu_site_regs site[SITES_MAX]; + u8 res5[0x9f8]; + u32 ipbrr0; /* IP Block Revision Register 0 */ + u32 ipbrr1; /* IP Block Revision Register 1 */ + u8 res6[0x310]; + u32 ttr0cr; /* Temperature Range 0 Control Register */ + u32 ttr1cr; /* Temperature Range 1 Control Register */ + u32 ttr2cr; /* Temperature Range 2 Control Register */ + u32 ttr3cr; /* Temperature Range 3 Control Register */ +}; + +/* + * Thermal zone data + */ +struct qoriq_tmu_data { + struct device_d *dev; + struct clk *clk; + struct qoriq_tmu_regs __iomem *regs; + int sensor_id; + bool little_endian; + int temp_passive; + int temp_critical; + + struct aiodevice aiodev; + struct aiochannel aiochan; +}; + +static inline struct qoriq_tmu_data *to_qoriq_tmu_data(struct aiochannel *chan) +{ + return container_of(chan, struct qoriq_tmu_data, aiochan); +} + +static void tmu_write(struct qoriq_tmu_data *p, u32 val, void __iomem *addr) +{ + if (p->little_endian) + iowrite32(val, addr); + else + iowrite32be(val, addr); +} + +static u32 tmu_read(struct qoriq_tmu_data *p, void __iomem *addr) +{ + if (p->little_endian) + return ioread32(addr); + else + return ioread32be(addr); +} + +static int tmu_get_temp(struct aiochannel *chan, int *temp) +{ + u32 val; + struct qoriq_tmu_data *data = to_qoriq_tmu_data(chan); + + val = tmu_read(data, &data->regs->site[data->sensor_id].tritsr); + + *temp = (val & 0xff) * 1000; + + return 0; +} + +static int qoriq_tmu_get_sensor_id(void) +{ + int ret, id; + struct of_phandle_args sensor_specs; + struct device_node *np, *sensor_np; + + np = of_find_node_by_name(NULL, "thermal-zones"); + if (!np) + return -ENODEV; + + sensor_np = of_get_next_child(np, NULL); + ret = of_parse_phandle_with_args(sensor_np, "thermal-sensors", + "#thermal-sensor-cells", + 0, &sensor_specs); + if (ret) + return ret; + + if (sensor_specs.args_count >= 1) { + id = sensor_specs.args[0]; + WARN(sensor_specs.args_count > 1, + "%s: too many cells in sensor specifier %d\n", + sensor_specs.np->name, sensor_specs.args_count); + } else { + id = 0; + } + + return id; +} + +static int qoriq_tmu_calibration(struct qoriq_tmu_data *data) +{ + int i, val, len; + u32 range[4]; + const u32 *calibration; + struct device_node *np = data->dev->device_node; + + if (of_property_read_u32_array(np, "fsl,tmu-range", range, 4)) { + dev_err(data->dev, "missing calibration range.\n"); + return -ENODEV; + } + + /* Init temperature range registers */ + tmu_write(data, range[0], &data->regs->ttr0cr); + tmu_write(data, range[1], &data->regs->ttr1cr); + tmu_write(data, range[2], &data->regs->ttr2cr); + tmu_write(data, range[3], &data->regs->ttr3cr); + + calibration = of_get_property(np, "fsl,tmu-calibration", &len); + if (calibration == NULL || len % 8) { + dev_err(data->dev, "invalid calibration data.\n"); + return -ENODEV; + } + + for (i = 0; i < len; i += 8, calibration += 2) { + val = of_read_number(calibration, 1); + tmu_write(data, val, &data->regs->ttcfgr); + val = of_read_number(calibration + 1, 1); + tmu_write(data, val, &data->regs->tscfgr); + } + + return 0; +} + +static void qoriq_tmu_init_device(struct qoriq_tmu_data *data) +{ + /* Disable interrupt, using polling instead */ + tmu_write(data, TIER_DISABLE, &data->regs->tier); + + /* Set update_interval */ + tmu_write(data, TMTMIR_DEFAULT, &data->regs->tmtmir); + + /* Disable monitoring */ + tmu_write(data, TMR_DISABLE, &data->regs->tmr); +} + +static int qoriq_tmu_probe(struct device_d *dev) +{ + struct device_node *np = dev->device_node; + struct qoriq_tmu_data *data; + u32 site; + int ret; + + data = xzalloc(sizeof(*data)); + + data->dev = dev; + data->little_endian = of_property_read_bool(np, "little-endian"); + + data->sensor_id = qoriq_tmu_get_sensor_id(); + if (data->sensor_id < 0) { + dev_err(dev, "Failed to get sensor id\n"); + return -ENODEV; + } + + data->regs = dev_request_mem_region(dev, 0); + if (IS_ERR(data->regs)) { + dev_err(dev, "Failed to get memory region\n"); + return PTR_ERR(data->regs); + } + + qoriq_tmu_init_device(data); /* TMU initialization */ + + ret = qoriq_tmu_calibration(data); /* TMU calibration */ + if (ret < 0) { + dev_err(dev, "Failed to calibrate\n"); + return ret; + } + + data->aiodev.num_channels = 1; + data->aiodev.hwdev = dev; + data->aiodev.channels = xmalloc(data->aiodev.num_channels * + sizeof(data->aiodev.channels[0])); + data->aiodev.channels[0] = &data->aiochan; + data->aiochan.unit = "mC"; + data->aiodev.read = tmu_get_temp; + + ret = aiodevice_register(&data->aiodev); + if (ret < 0) { + dev_err(dev, "Failed to register aiodev\n"); + return ret; + } + + site = 0x1 << (15 - data->sensor_id); + tmu_write(data, site | TMR_ME | TMR_ALPF, &data->regs->tmr); + + return 0; +} + +static const struct of_device_id qoriq_tmu_match[] = { + { .compatible = "fsl,qoriq-tmu", }, + { .compatible = "fsl,imx8mq-tmu",}, + {}, +}; + +static struct driver_d imx_thermal_driver = { + .name = "qoriq_thermal", + .probe = qoriq_tmu_probe, + .of_compatible = DRV_OF_COMPAT(qoriq_tmu_match), +}; +device_platform_driver(imx_thermal_driver); -- 2.17.1 _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
