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Commit b840b6e6 authored by Eduardo Valentin's avatar Eduardo Valentin
Browse files

thermal: ti-soc-thermal: add OMAP36xx support 

Add OMAP36xx support to ti-soc-thermal driver. This
chip is also unreliable. The data provided here is
based on OMAP36xx TRM:
http://www.ti.com/lit/ug/swpu177aa/swpu177aa.pdf



Signed-off-by: default avatarEduardo Valentin <edubezva@gmail.com>
Signed-off-by: default avatarEduardo Valentin <edubezval@gmail.com>
parent 9c5c87e5

Documentation/devicetree/bindings/thermal/ti_soc_thermal.txt

+7 −0
Original line number Diff line number Diff line
@@ -11,6 +11,7 @@ to the silicon temperature. 
Required properties:

- compatible : Should be:

  - "ti,omap34xx-bandgap" : for OMAP34xx bandgap

  - "ti,omap36xx-bandgap" : for OMAP36xx bandgap

  - "ti,omap4430-bandgap" : for OMAP4430 bandgap

  - "ti,omap4460-bandgap" : for OMAP4460 bandgap

  - "ti,omap4470-bandgap" : for OMAP4470 bandgap
@@ -32,6 +33,12 @@ bandgap { 
	compatible = "ti,omap34xx-bandgap";

};



OMAP36xx:

bandgap {

	reg = <0x48002524 0x4>;

	compatible = "ti,omap36xx-bandgap";

};



OMAP4430:

bandgap {

	reg = <0x4a002260 0x4 0x4a00232C 0x4>;

drivers/thermal/ti-soc-thermal/omap3-thermal-data.c

+73 −0
Original line number Diff line number Diff line
@@ -101,3 +101,76 @@ const struct ti_bandgap_data omap34xx_data = { 
	},

	.sensor_count = 1,

};



/*

 * OMAP36XX has one instance of thermal sensor for MPU

 * need to describe the individual bit fields

 */

static struct temp_sensor_registers

omap36xx_mpu_temp_sensor_registers = {

	.temp_sensor_ctrl = 0,

	.bgap_soc_mask = BIT(9),

	.bgap_eocz_mask = BIT(8),

	.bgap_dtemp_mask = 0xFF,



	.bgap_mode_ctrl = 0,

	.mode_ctrl_mask = BIT(10),

};



/* Thresholds and limits for OMAP36XX MPU temperature sensor */

static struct temp_sensor_data omap36xx_mpu_temp_sensor_data = {

	.min_freq = 32768,

	.max_freq = 32768,

	.max_temp = 125000,

	.min_temp = -40000,

	.hyst_val = 5000,

};



/*

 * Temperature values in milli degree celsius

 */

static const int

omap36xx_adc_to_temp[128] = {

	-40000, -40000, -40000, -40000, -40000, -40000, -40000, -40000,

	-40000, -40000, -40000,	-40000, -40000, -38000, -35000, -34000,

	-32000, -30000, -28000, -26000, -24000, -22000,	-20000, -18500,

	-17000, -15000, -13500, -12000, -10000, -8000, -6500, -5000, -3500,

	-1500, 0, 2000, 3500, 5000, 6500, 8500, 10000, 12000, 13500,

	15000, 17000, 19000, 21000, 23000, 25000, 27000, 28500, 30000,

	32000, 33500, 35000, 37000, 38500, 40000, 42000, 43500, 45000,

	47000, 48500, 50000, 52000, 53500, 55000, 57000, 58500, 60000,

	62000, 64000, 66000, 68000, 70000, 71500, 73500, 75000, 77000,

	78500, 80000, 82000, 83500, 85000, 87000, 88500, 90000, 92000,

	93500, 95000, 97000, 98500, 100000, 102000, 103500, 105000, 107000,

	109000, 111000, 113000, 115000, 117000, 118500, 120000, 122000,

	123500, 125000, 125000, 125000, 125000, 125000, 125000, 125000,

	125000, 125000, 125000, 125000, 125000, 125000, 125000, 125000,

	125000, 125000, 125000, 125000, 125000, 125000,	125000

};



/* OMAP36XX data */

const struct ti_bandgap_data omap36xx_data = {

	.features = TI_BANDGAP_FEATURE_CLK_CTRL | TI_BANDGAP_FEATURE_UNRELIABLE,

	.fclock_name = "ts_fck",

	.div_ck_name = "ts_fck",

	.conv_table = omap36xx_adc_to_temp,

	.adc_start_val = 0,

	.adc_end_val = 127,

	.expose_sensor = ti_thermal_expose_sensor,

	.remove_sensor = ti_thermal_remove_sensor,



	.sensors = {

		{

		.registers = &omap36xx_mpu_temp_sensor_registers,

		.ts_data = &omap36xx_mpu_temp_sensor_data,

		.domain = "cpu",

		.slope = 0,

		.constant = 20000,

		.slope_pcb = 0,

		.constant_pcb = 20000,

		.register_cooling = NULL,

		.unregister_cooling = NULL,

		},

	},

	.sensor_count = 1,

};

drivers/thermal/ti-soc-thermal/ti-bandgap.c

+4 −0
Original line number Diff line number Diff line
@@ -1588,6 +1588,10 @@ static const struct of_device_id of_ti_bandgap_match[] = { 
		.compatible = "ti,omap34xx-bandgap",

		.data = (void *)&omap34xx_data,

	},

	{

		.compatible = "ti,omap36xx-bandgap",

		.data = (void *)&omap36xx_data,

	},

#endif

#ifdef CONFIG_OMAP4_THERMAL

	{

drivers/thermal/ti-soc-thermal/ti-bandgap.h

+2 −0
Original line number Diff line number Diff line
@@ -395,8 +395,10 @@ 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