[PATCH] ti-soc-thermal: implement omap3 support
From: Grazvydas Ignotas <hidden>
Date: 2015-03-31 15:02:58
Also in:
linux-devicetree, linux-omap, linux-pm, lkml
On Tue, Mar 31, 2015 at 11:42 AM, Pavel Machek [off-list ref] wrote:
quoted hunk ↗ jump to hunk
This adds support for OMAP3 chips to ti-soc-thermal. As requested by TI people, it is marked unreliable and warning is printed. Signed-off-by: Pavel Machek <redacted> --- ...--- /dev/null +++ b/drivers/thermal/ti-soc-thermal/omap3-thermal-data.c@@ -0,0 +1,103 @@ +/* + * OMAP3 thermal driver. + * + * Copyright (C) 2011-2012 Texas Instruments Inc. + * Copyright (C) 2014 Pavel Machek <pavel@ucw.cz> + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * 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. + * + * Note + * http://www.ti.com/lit/er/sprz278f/sprz278f.pdf "Advisory + * 3.1.1.186 MMC OCP Clock Not Gated When Thermal Sensor Is Used" + * + * Also TI says: + * Just be careful when you try to make thermal policy like decisions + * based on this sensor. Placement of the sensor w.r.t the actual logic + * generating heat has to be a factor as well. If you are just looking + * for an approximation temperature (thermometerish kind), you might be + * ok with this. I am not sure we'd find any TI data around this.. just a + * heads up. + */ + +#include "ti-thermal.h" +#include "ti-bandgap.h" + +/* + * OMAP34XX has one instance of thermal sensor for MPU + * need to describe the individual bit fields + */ +static struct temp_sensor_registers +omap34xx_mpu_temp_sensor_registers = { + .temp_sensor_ctrl = 0, + .bgap_soc_mask = BIT(8), + .bgap_eocz_mask = BIT(7), + .bgap_dtemp_mask = 0x7f, + + .bgap_mode_ctrl = 0, + .mode_ctrl_mask = BIT(9), +}; + +/* Thresholds and limits for OMAP34XX MPU temperature sensor */ +static struct temp_sensor_data omap34xx_mpu_temp_sensor_data = { + .min_freq = 32768, + .max_freq = 32768, + .max_temp = -99000, + .min_temp = 99000,
This looks mixed up. Also, perhaps use -40000 to 125000 to match the table below?
+ .hyst_val = 5000,
+};
+
+/*
+ * Temperature values in milli degree celsius
+ */
+static const int
+omap34xx_adc_to_temp[128] = {
+ -40000, -40000, -40000, -40000, -40000, -39000, -38000, -36000,
+ -34000, -32000, -31000, -29000, -28000, -26000, -25000, -24000,
+ -22000, -21000, -19000, -18000, -17000, -15000, -14000, -12000,
+ -11000, -9000, -8000, -7000, -5000, -4000, -2000, -1000, 0000,
+ 1000, 3000, 4000, 5000, 7000, 8000, 10000, 11000, 13000, 14000,
+ 15000, 17000, 18000, 20000, 21000, 22000, 24000, 25000, 27000,
+ 28000, 30000, 31000, 32000, 34000, 35000, 37000, 38000, 39000,
+ 41000, 42000, 44000, 45000, 47000, 48000, 49000, 51000, 52000,
+ 53000, 55000, 56000, 58000, 59000, 60000, 62000, 63000, 65000,
+ 66000, 67000, 69000, 70000, 72000, 73000, 74000, 76000, 77000,
+ 79000, 80000, 81000, 83000, 84000, 85000, 87000, 88000, 89000,
+ 91000, 92000, 94000, 95000, 96000, 98000, 99000, 100000,
+ 102000, 103000, 105000, 106000, 107000, 109000, 110000, 111000,
+ 113000, 114000, 116000, 117000, 118000, 120000, 121000, 122000,
+ 124000, 124000, 125000, 125000, 125000, 125000, 125000
+};Gra?vydas