The device file adds the device support for OMAP4 on die temperature sensor.
Signed-off-by: Keerthy <[email protected]> --- arch/arm/mach-omap2/Makefile | 3 +- arch/arm/mach-omap2/temp_sensor_device.c | 85 +++++++++++++++++++ arch/arm/plat-omap/Kconfig | 12 +++ .../plat-omap/include/plat/temperature_sensor.h | 87 ++++++++++++++++++++ 4 files changed, 186 insertions(+), 1 deletions(-) create mode 100644 arch/arm/mach-omap2/temp_sensor_device.c create mode 100644 arch/arm/plat-omap/include/plat/temperature_sensor.h diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile index fb02937..5812fb4 100644 --- a/arch/arm/mach-omap2/Makefile +++ b/arch/arm/mach-omap2/Makefile @@ -18,6 +18,7 @@ obj-$(CONFIG_ARCH_OMAP4) += prm44xx.o $(hwmod-common) obj-$(CONFIG_OMAP_MCBSP) += mcbsp.o +obj-$(CONFIG_OMAP_TEMP_SENSOR) += temp_sensor_device.o obj-$(CONFIG_TWL4030_CORE) += omap_twl.o # SMP support ONLY available for OMAP4 @@ -86,7 +87,7 @@ obj-$(CONFIG_ARCH_OMAP3) += prcm.o cm2xxx_3xxx.o prm2xxx_3xxx.o \ obj-$(CONFIG_ARCH_OMAP4) += prcm.o cm2xxx_3xxx.o cminst44xx.o \ cm44xx.o prcm_mpu44xx.o \ prminst44xx.o vc44xx_data.o \ - vp44xx_data.o + vp44xx_data.o temp_sensor4460_data.o # OMAP voltage domains ifeq ($(CONFIG_PM),y) diff --git a/arch/arm/mach-omap2/temp_sensor_device.c b/arch/arm/mach-omap2/temp_sensor_device.c new file mode 100644 index 0000000..5d5e92f --- /dev/null +++ b/arch/arm/mach-omap2/temp_sensor_device.c @@ -0,0 +1,85 @@ +/* + * OMAP on die Temperature sensor device file + * + * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/ + * Author: J Keerthy <[email protected]> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + * + */ + +#include <linux/err.h> +#include <linux/slab.h> +#include <linux/io.h> +#include <linux/pm_runtime.h> +#include <plat/omap_device.h> +#include "control.h" +#include "pm.h" +#include <plat/temperature_sensor.h> + +static struct omap_device_pm_latency omap_temp_sensor_latency[] = { + { + .deactivate_func = omap_device_idle_hwmods, + .activate_func = omap_device_enable_hwmods, + .flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST, + } +}; + +static int temp_sensor_dev_init(struct omap_hwmod *oh, void *user) +{ + struct omap_temp_sensor_pdata *temp_sensor_pdata; + struct omap_device *od; + struct omap_temp_sensor_dev_attr *temp_sensor_dev_attr; + int ret; + static int device_count; + + ret = 0; + temp_sensor_pdata = + kzalloc(sizeof(*temp_sensor_pdata), GFP_KERNEL); + if (!temp_sensor_pdata) { + dev_err(&oh->od->pdev.dev, + "Unable to allocate memory for temp sensor pdata\n"); + return -ENOMEM; + } + + temp_sensor_dev_attr = oh->dev_attr; + if (!strcmp(temp_sensor_dev_attr->name, "mpu")) + temp_sensor_pdata->registers = &omap_mpu_temp_sensor_registers; + + od = omap_device_build("omap_temp_sensor", device_count++, + oh, temp_sensor_pdata, sizeof(*temp_sensor_pdata), + omap_temp_sensor_latency, + ARRAY_SIZE(omap_temp_sensor_latency), 0); + if (IS_ERR(od)) { + dev_warn(&oh->od->pdev.dev, + "Could not build omap_device for %s\n", oh->name); + ret = PTR_ERR(od); + } + + kfree(temp_sensor_pdata); + + return ret; +} + +int __init omap_devinit_temp_sensor(void) +{ + if (!cpu_is_omap446x()) + return 0; + + return omap_hwmod_for_each_by_class("temperature_sensor", + temp_sensor_dev_init, NULL); +} + +arch_initcall(omap_devinit_temp_sensor); diff --git a/arch/arm/plat-omap/Kconfig b/arch/arm/plat-omap/Kconfig index 6e6735f..8fd8e80 100644 --- a/arch/arm/plat-omap/Kconfig +++ b/arch/arm/plat-omap/Kconfig @@ -115,6 +115,18 @@ config OMAP_MCBSP Say Y here if you want support for the OMAP Multichannel Buffered Serial Port. +config OMAP_TEMP_SENSOR + bool "OMAP Temp Sensor Support" + depends on ARCH_OMAP + default n + help + Say Y here if you want support for the temp sensor + on OMAP4460. + + This provides the temperature of the MPU + subsystem. Only one instance of on die temperature + sensor is present. + config OMAP_MBOX_FWK tristate "Mailbox framework support" depends on ARCH_OMAP diff --git a/arch/arm/plat-omap/include/plat/temperature_sensor.h b/arch/arm/plat-omap/include/plat/temperature_sensor.h new file mode 100644 index 0000000..692ebdc --- /dev/null +++ b/arch/arm/plat-omap/include/plat/temperature_sensor.h @@ -0,0 +1,87 @@ +/* + * OMAP Temperature sensor header file + * + * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/ + * Author: J Keerthy <[email protected]> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + * + */ + +#ifndef __ARCH_ARM_PLAT_OMAP_INCLUDE_PLAT_TEMPERATURE_SENSOR_H +#define __ARCH_ARM_PLAT_OMAP_INCLUDE_PLAT_TEMPERATURE_SENSOR_H + +/* Offsets from the base of temperature sensor registers */ + +#define OMAP4460_TEMP_SENSOR_CTRL_OFFSET 0x00 +#define OMAP4460_BGAP_CTRL_OFFSET 0x4c +#define OMAP4460_BGAP_COUNTER_OFFSET 0x50 +#define OMAP4460_BGAP_THRESHOLD_OFFSET 0x54 +#define OMAP4460_BGAP_TSHUT_OFFSET 0x58 +#define OMAP4460_BGAP_STATUS_OFFSET 0x5c +#define OMAP4460_FUSE_OPP_BGAP -0xcc + +struct omap_temp_sensor_registers { + u32 temp_sensor_ctrl; + u32 bgap_tempsoff_mask; + u32 bgap_soc_mask; + u32 bgap_eocz_mask; + u32 bgap_dtemp_mask; + + u32 bgap_mask_ctrl; + u32 mask_hot_mask; + u32 mask_cold_mask; + + u32 bgap_mode_ctrl; + u32 mode_ctrl_mask; + + u32 bgap_counter; + u32 counter_mask; + + u32 bgap_threshold; + u32 threshold_thot_mask; + u32 threshold_tcold_mask; + + u32 thsut_threshold; + u32 tshut_hot_mask; + u32 tshut_cold_mask; + + u32 bgap_status; + u32 status_clean_stop_mask; + u32 status_bgap_alert_mask; + u32 status_hot_mask; + u32 status_cold_mask; + + u32 bgap_efuse; +}; + +/* + * @name: Name of the domain of the temperature sensor + */ +struct omap_temp_sensor_dev_attr { + const char *name; +}; + +extern struct omap_temp_sensor_registers omap_mpu_temp_sensor_registers; + +/* + * omap_temp_sensor platform data + * @registers - pointer to register set and thier bit fields information + */ +struct omap_temp_sensor_pdata { + struct omap_temp_sensor_registers *registers; +}; + +#endif -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
