| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Eduardo Valentin | 604 | 91.24% | 15 | 62.50% |
| J Keerthy | 32 | 4.83% | 6 | 25.00% |
| Pavel Machek | 20 | 3.02% | 1 | 4.17% |
| Bartlomiej Zolnierkiewicz | 4 | 0.60% | 1 | 4.17% |
| Radhesh Fadnis | 2 | 0.30% | 1 | 4.17% |
| Total | 662 | 24 |
/* * OMAP4 Bandgap temperature sensor driver * * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/ * Contact: * Eduardo Valentin <eduardo.valentin@ti.com> * * 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 __TI_BANDGAP_H #define __TI_BANDGAP_H #include <linux/spinlock.h> #include <linux/types.h> #include <linux/err.h> /** * DOC: bandgap driver data structure * ================================== * * +----------+----------------+ * | struct temp_sensor_regval | * +---------------------------+ * * (Array of) * | * | * +-------------------+ +-----------------+ * | struct ti_bandgap |-->| struct device * | * +----------+--------+ +-----------------+ * | * | * V * +------------------------+ * | struct ti_bandgap_data | * +------------------------+ * | * | * * (Array of) * +------------+------------------------------------------------------+ * | +----------+------------+ +-------------------------+ | * | | struct ti_temp_sensor |-->| struct temp_sensor_data | | * | +-----------------------+ +------------+------------+ | * | | | * | + | * | V | * | +----------+-------------------+ | * | | struct temp_sensor_registers | | * | +------------------------------+ | * | | * +-------------------------------------------------------------------+ * * Above is a simple diagram describing how the data structure below * are organized. For each bandgap device there should be a ti_bandgap_data * containing the device instance configuration, as well as, an array of * sensors, representing every sensor instance present in this bandgap. */ /** * struct temp_sensor_registers - descriptor to access registers and bitfields * @temp_sensor_ctrl: TEMP_SENSOR_CTRL register offset * @bgap_tempsoff_mask: mask to temp_sensor_ctrl.tempsoff * @bgap_soc_mask: mask to temp_sensor_ctrl.soc * @bgap_eocz_mask: mask to temp_sensor_ctrl.eocz * @bgap_dtemp_mask: mask to temp_sensor_ctrl.dtemp * @bgap_mask_ctrl: BANDGAP_MASK_CTRL register offset * @mask_hot_mask: mask to bandgap_mask_ctrl.mask_hot * @mask_cold_mask: mask to bandgap_mask_ctrl.mask_cold * @mask_counter_delay_mask: mask to bandgap_mask_ctrl.mask_counter_delay * @mask_freeze_mask: mask to bandgap_mask_ctrl.mask_free * @bgap_mode_ctrl: BANDGAP_MODE_CTRL register offset * @mode_ctrl_mask: mask to bandgap_mode_ctrl.mode_ctrl * @bgap_counter: BANDGAP_COUNTER register offset * @counter_mask: mask to bandgap_counter.counter * @bgap_threshold: BANDGAP_THRESHOLD register offset (TALERT thresholds) * @threshold_thot_mask: mask to bandgap_threhold.thot * @threshold_tcold_mask: mask to bandgap_threhold.tcold * @tshut_threshold: TSHUT_THRESHOLD register offset (TSHUT thresholds) * @tshut_hot_mask: mask to tshut_threhold.thot * @tshut_cold_mask: mask to tshut_threhold.thot * @bgap_status: BANDGAP_STATUS register offset * @status_hot_mask: mask to bandgap_status.hot * @status_cold_mask: mask to bandgap_status.cold * @ctrl_dtemp_1: CTRL_DTEMP1 register offset * @ctrl_dtemp_2: CTRL_DTEMP2 register offset * @bgap_efuse: BANDGAP_EFUSE register offset * * The register offsets and bitfields might change across * OMAP and variants versions. Hence this struct serves as a * descriptor map on how to access the registers and the bitfields. * * This descriptor contains registers of all versions of bandgap chips. * Not all versions will use all registers, depending on the available * features. Please read TRMs for descriptive explanation on each bitfield. */ struct 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 mask_counter_delay_mask; u32 mask_freeze_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 tshut_threshold; u32 tshut_hot_mask; u32 tshut_cold_mask; u32 bgap_status; u32 status_hot_mask; u32 status_cold_mask; u32 ctrl_dtemp_1; u32 ctrl_dtemp_2; u32 bgap_efuse; }; /** * struct temp_sensor_data - The thresholds and limits for temperature sensors. * @tshut_hot: temperature to trigger a thermal reset (initial value) * @tshut_cold: temp to get the plat out of reset due to thermal (init val) * @t_hot: temperature to trigger a thermal alert (high initial value) * @t_cold: temperature to trigger a thermal alert (low initial value) * @min_freq: sensor minimum clock rate * @max_freq: sensor maximum clock rate * * This data structure will hold the required thresholds and temperature limits * for a specific temperature sensor, like shutdown temperature, alert * temperature, clock / rate used, ADC conversion limits and update intervals */ struct temp_sensor_data { u32 tshut_hot; u32 tshut_cold; u32 t_hot; u32 t_cold; u32 min_freq; u32 max_freq; }; struct ti_bandgap_data; /** * struct temp_sensor_regval - temperature sensor register values and priv data * @bg_mode_ctrl: temp sensor control register value * @bg_ctrl: bandgap ctrl register value * @bg_counter: bandgap counter value * @bg_threshold: bandgap threshold register value * @tshut_threshold: bandgap tshut register value * @data: private data * * Data structure to save and restore bandgap register set context. Only * required registers are shadowed, when needed. */ struct temp_sensor_regval { u32 bg_mode_ctrl; u32 bg_ctrl; u32 bg_counter; u32 bg_threshold; u32 tshut_threshold; void *data; }; /** * struct ti_bandgap - bandgap device structure * @dev: struct device pointer * @base: io memory base address * @conf: struct with bandgap configuration set (# sensors, conv_table, etc) * @regval: temperature sensor register values * @fclock: pointer to functional clock of temperature sensor * @div_clk: pointer to divider clock of temperature sensor fclk * @lock: spinlock for ti_bandgap structure * @irq: MPU IRQ number for thermal alert * @tshut_gpio: GPIO where Tshut signal is routed * @clk_rate: Holds current clock rate * * The bandgap device structure representing the bandgap device instance. * It holds most of the dynamic stuff. Configurations and sensor specific * entries are inside the @conf structure. */ struct ti_bandgap { struct device *dev; void __iomem *base; const struct ti_bandgap_data *conf; struct temp_sensor_regval *regval; struct clk *fclock; struct clk *div_clk; spinlock_t lock; /* shields this struct */ int irq; int tshut_gpio; u32 clk_rate; }; /** * struct ti_temp_sensor - bandgap temperature sensor configuration data * @ts_data: pointer to struct with thresholds, limits of temperature sensor * @registers: pointer to the list of register offsets and bitfields * @domain: the name of the domain where the sensor is located * @slope_pcb: sensor gradient slope info for hotspot extrapolation equation * with no external influence * @constant_pcb: sensor gradient const info for hotspot extrapolation equation * with no external influence * @register_cooling: function to describe how this sensor is going to be cooled * @unregister_cooling: function to release cooling data * * Data structure to describe a temperature sensor handled by a bandgap device. * It should provide configuration details on this sensor, such as how to * access the registers affecting this sensor, shadow register buffer, how to * assess the gradient from hotspot, how to cooldown the domain when sensor * reports too hot temperature. */ struct ti_temp_sensor { struct temp_sensor_data *ts_data; struct temp_sensor_registers *registers; char *domain; /* for hotspot extrapolation */ const int slope_pcb; const int constant_pcb; int (*register_cooling)(struct ti_bandgap *bgp, int id); int (*unregister_cooling)(struct ti_bandgap *bgp, int id); }; /** * DOC: ti bandgap feature types * * TI_BANDGAP_FEATURE_TSHUT - used when the thermal shutdown signal output * of a bandgap device instance is routed to the processor. This means * the system must react and perform the shutdown by itself (handle an * IRQ, for instance). * * TI_BANDGAP_FEATURE_TSHUT_CONFIG - used when the bandgap device has control * over the thermal shutdown configuration. This means that the thermal * shutdown thresholds are programmable, for instance. * * TI_BANDGAP_FEATURE_TALERT - used when the bandgap device instance outputs * a signal representing violation of programmable alert thresholds. * * TI_BANDGAP_FEATURE_MODE_CONFIG - used when it is possible to choose which * mode, continuous or one shot, the bandgap device instance will operate. * * TI_BANDGAP_FEATURE_COUNTER - used when the bandgap device instance allows * programming the update interval of its internal state machine. * * TI_BANDGAP_FEATURE_POWER_SWITCH - used when the bandgap device allows * itself to be switched on/off. * * TI_BANDGAP_FEATURE_CLK_CTRL - used when the clocks feeding the bandgap * device are gateable or not. * * TI_BANDGAP_FEATURE_FREEZE_BIT - used when the bandgap device features * a history buffer that its update can be freezed/unfreezed. * * TI_BANDGAP_FEATURE_COUNTER_DELAY - used when the bandgap device features * a delay programming based on distinct values. * * TI_BANDGAP_FEATURE_HISTORY_BUFFER - used when the bandgap device features * a history buffer of temperatures. * * TI_BANDGAP_FEATURE_ERRATA_814 - used to workaorund when the bandgap device * has Errata 814 * TI_BANDGAP_FEATURE_UNRELIABLE - used when the sensor readings are too * inaccurate. * TI_BANDGAP_HAS(b, f) - macro to check if a bandgap device is capable of a * specific feature (above) or not. Return non-zero, if yes. */ #define TI_BANDGAP_FEATURE_TSHUT BIT(0) #define TI_BANDGAP_FEATURE_TSHUT_CONFIG BIT(1) #define TI_BANDGAP_FEATURE_TALERT BIT(2) #define TI_BANDGAP_FEATURE_MODE_CONFIG BIT(3) #define TI_BANDGAP_FEATURE_COUNTER BIT(4) #define TI_BANDGAP_FEATURE_POWER_SWITCH BIT(5) #define TI_BANDGAP_FEATURE_CLK_CTRL BIT(6) #define TI_BANDGAP_FEATURE_FREEZE_BIT BIT(7) #define TI_BANDGAP_FEATURE_COUNTER_DELAY BIT(8) #define TI_BANDGAP_FEATURE_HISTORY_BUFFER BIT(9) #define TI_BANDGAP_FEATURE_ERRATA_814 BIT(10) #define TI_BANDGAP_FEATURE_UNRELIABLE BIT(11) #define TI_BANDGAP_HAS(b, f) \ ((b)->conf->features & TI_BANDGAP_FEATURE_ ## f) /** * struct ti_bandgap_data - ti bandgap data configuration structure * @features: a bitwise flag set to describe the device features * @conv_table: Pointer to ADC to temperature conversion table * @adc_start_val: ADC conversion table starting value * @adc_end_val: ADC conversion table ending value * @fclock_name: clock name of the functional clock * @div_ck_name: clock name of the clock divisor * @sensor_count: count of temperature sensor within this bandgap device * @report_temperature: callback to report thermal alert to thermal API * @expose_sensor: callback to export sensor to thermal API * @remove_sensor: callback to destroy sensor from thermal API * @sensors: array of sensors present in this bandgap instance * * This is a data structure which should hold most of the static configuration * of a bandgap device instance. It should describe which features this instance * is capable of, the clock names to feed this device, the amount of sensors and * their configuration representation, and how to export and unexport them to * a thermal API. */ struct ti_bandgap_data { unsigned int features; const int *conv_table; u32 adc_start_val; u32 adc_end_val; char *fclock_name; char *div_ck_name; int sensor_count; int (*report_temperature)(struct ti_bandgap *bgp, int id); int (*expose_sensor)(struct ti_bandgap *bgp, int id, char *domain); int (*remove_sensor)(struct ti_bandgap *bgp, int id); /* this needs to be at the end */ struct ti_temp_sensor sensors[]; }; int ti_bandgap_read_thot(struct ti_bandgap *bgp, int id, int *thot); int ti_bandgap_write_thot(struct ti_bandgap *bgp, int id, int val); int ti_bandgap_read_tcold(struct ti_bandgap *bgp, int id, int *tcold); int ti_bandgap_write_tcold(struct ti_bandgap *bgp, int id, int val); int ti_bandgap_read_update_interval(struct ti_bandgap *bgp, int id, int *interval); int ti_bandgap_write_update_interval(struct ti_bandgap *bgp, int id, u32 interval); int ti_bandgap_read_temperature(struct ti_bandgap *bgp, int id, int *temperature); int ti_bandgap_set_sensor_data(struct ti_bandgap *bgp, int id, void *data); void *ti_bandgap_get_sensor_data(struct ti_bandgap *bgp, int id); int ti_bandgap_get_trend(struct ti_bandgap *bgp, int id, int *trend); #ifdef CONFIG_OMAP3_THERMAL extern const struct ti_bandgap_data omap34xx_data; extern const struct ti_bandgap_data omap36xx_data; #else #define omap34xx_data NULL #define omap36xx_data NULL #endif #ifdef CONFIG_OMAP4_THERMAL extern const struct ti_bandgap_data omap4430_data; extern const struct ti_bandgap_data omap4460_data; extern const struct ti_bandgap_data omap4470_data; #else #define omap4430_data NULL #define omap4460_data NULL #define omap4470_data NULL #endif #ifdef CONFIG_OMAP5_THERMAL extern const struct ti_bandgap_data omap5430_data; #else #define omap5430_data NULL #endif #ifdef CONFIG_DRA752_THERMAL extern const struct ti_bandgap_data dra752_data; #else #define dra752_data NULL #endif #endif
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