Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755615AbbKCRsg (ORCPT ); Tue, 3 Nov 2015 12:48:36 -0500 Received: from mail-pa0-f42.google.com ([209.85.220.42]:36360 "EHLO mail-pa0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754440AbbKCRsf (ORCPT ); Tue, 3 Nov 2015 12:48:35 -0500 Date: Tue, 3 Nov 2015 09:48:31 -0800 From: Eduardo Valentin To: Caesar Wang Cc: Heiko Stuebner , linux-rockchip@lists.infradead.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, Zhang Rui , linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH v1 3/6] thermal: rockchip: Support the RK3368 SoCs in thermal driver Message-ID: <20151103174830.GA9987@localhost.localdomain> References: <1446102858-10116-1-git-send-email-wxt@rock-chips.com> <1446102858-10116-4-git-send-email-wxt@rock-chips.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1446102858-10116-4-git-send-email-wxt@rock-chips.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 12505 Lines: 380 Hello Caesar, On Thu, Oct 29, 2015 at 03:14:15PM +0800, Caesar Wang wrote: > The RK3368 SoCs support to 2 channel TS-ADC, the temperature criteria > of each channel can be configurable. > > The system has two Temperature Sensors, channel 0 is for CPU, > and channel 1 is for GPU. Please improve your patch description. I dont think this patch only adds the support for RK3368. I see, for example, at least two other (maybe dependencies of the new chip support) changes: - conversion function improvement - tshut value/temperature configuration Could you please split this patch in smaller changes? > > Signed-off-by: Caesar Wang > > --- > > Changes in v1: > - As Dmitry comment, make the conversion table in as a parameter. > Are you sure that this version implements this suggestion? > drivers/thermal/rockchip_thermal.c | 183 ++++++++++++++++++++++++++++++++----- > 1 file changed, 158 insertions(+), 25 deletions(-) > > diff --git a/drivers/thermal/rockchip_thermal.c b/drivers/thermal/rockchip_thermal.c > index f96c151..4748a8e 100644 > --- a/drivers/thermal/rockchip_thermal.c > +++ b/drivers/thermal/rockchip_thermal.c > @@ -1,6 +1,9 @@ > /* > * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd > * > + * Copyright (c) 2015, Fuzhou Rockchip Electronics Co., Ltd > + * Caesar Wang > + * > * 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. > @@ -75,8 +78,12 @@ struct rockchip_tsadc_chip { > > /* Per-sensor methods */ > int (*get_temp)(int chn, void __iomem *reg, int *temp); > - void (*set_tshut_temp)(int chn, void __iomem *reg, long temp); > + void (*set_tshut_value)(int chn, void __iomem *reg, u32 value); Do you have any explanation why do you need to change from temp to value? Can you include this in your patch description? > void (*set_tshut_mode)(int chn, void __iomem *reg, enum tshut_mode m); > + > + /* Per-table methods */ > + const struct tsadc_table *table; > + int table_num; > }; > > struct rockchip_thermal_sensor { > @@ -102,7 +109,7 @@ struct rockchip_thermal_data { > enum tshut_polarity tshut_polarity; > }; > > -/* TSADC V2 Sensor info define: */ > +/* TSADC Sensor info define: */ > #define TSADCV2_AUTO_CON 0x04 > #define TSADCV2_INT_EN 0x08 > #define TSADCV2_INT_PD 0x0c > @@ -124,6 +131,8 @@ struct rockchip_thermal_data { > #define TSADCV2_INT_PD_CLEAR_MASK ~BIT(8) > > #define TSADCV2_DATA_MASK 0xfff > +#define TSADCV3_DATA_MASK 0x3ff > + > #define TSADCV2_HIGHT_INT_DEBOUNCE_COUNT 4 > #define TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT 4 > #define TSADCV2_AUTO_PERIOD_TIME 250 /* msec */ > @@ -172,21 +181,62 @@ static const struct tsadc_table v2_code_table[] = { > {3421, 125000}, > }; > > -static u32 rk_tsadcv2_temp_to_code(long temp) > +static const struct tsadc_table v3_code_table[] = { > + {0, -40000}, > + {106, -40000}, > + {108, -35000}, > + {110, -30000}, > + {112, -25000}, > + {114, -20000}, > + {116, -15000}, > + {118, -10000}, > + {120, -5000}, > + {122, 0}, > + {124, 5000}, > + {126, 10000}, > + {128, 15000}, > + {130, 20000}, > + {132, 25000}, > + {134, 30000}, > + {136, 35000}, > + {138, 40000}, > + {140, 45000}, > + {142, 50000}, > + {144, 55000}, > + {146, 60000}, > + {148, 65000}, > + {150, 70000}, > + {152, 75000}, > + {154, 80000}, > + {156, 85000}, > + {158, 90000}, > + {160, 95000}, > + {162, 100000}, > + {163, 105000}, > + {165, 110000}, > + {167, 115000}, > + {169, 120000}, > + {171, 125000}, > + {TSADCV3_DATA_MASK, 125000}, > +}; > + > +static u32 rk_tsadcv2_temp_to_code(const struct rockchip_tsadc_chip *chip, > + long temp) > { This function receives the chip structure as parameter... > + const struct tsadc_table *table = chip->table; > int high, low, mid; > > low = 0; > - high = ARRAY_SIZE(v2_code_table) - 1; > + high = chip->table_num - 1; > mid = (high + low) / 2; > > - if (temp < v2_code_table[low].temp || temp > v2_code_table[high].temp) > + if (temp < table[low].temp || temp > table[high].temp) > return 0; > > while (low <= high) { > - if (temp == v2_code_table[mid].temp) > - return v2_code_table[mid].code; > - else if (temp < v2_code_table[mid].temp) > + if (temp == table[mid].temp) > + return table[mid].code; > + else if (temp < table[mid].temp) > high = mid - 1; > else > low = mid + 1; And seams to do the work.. but.. I am assuming you have forgotten to continue the change in the remaining functions: rk_tsadcv2_code_to_temp: 215 216 /* 217 * The 5C granularity provided by the table is too much. Let's 218 * assume that the relationship between sensor readings and 219 * temperature between 2 table entries is linear and interpolate 220 * to produce less granular result. 221 */ 222 num = v2_code_table[mid].temp - v2_code_table[mid - 1].temp; 223 num *= v2_code_table[mid - 1].code - code; 224 denom = v2_code_table[mid - 1].code - v2_code_table[mid].code; 225 *temp = v2_code_table[mid - 1].temp + (num / denom); 226 Please finish the change in rk_tsadcv2_code_to_temp, to use chip->table, and > @@ -235,16 +285,59 @@ static int rk_tsadcv2_code_to_temp(u32 code, int *temp) > return 0; > } > > +static int rk_tsadcv3_code_to_temp(u32 code, int *temp) > +{ > + unsigned int low = 1; > + unsigned int high = ARRAY_SIZE(v3_code_table) - 1; > + unsigned int mid = (low + high) / 2; > + unsigned int num; > + unsigned long denom; > + > + BUILD_BUG_ON(ARRAY_SIZE(v3_code_table) < 2); > + > + code &= TSADCV3_DATA_MASK; > + if (code < v3_code_table[low].code) > + return -EAGAIN; /* Incorrect reading */ > + > + while (low <= high) { > + if (code >= v3_code_table[mid - 1].code && > + code < v3_code_table[mid].code) > + break; > + else if (code > v3_code_table[mid].code) > + low = mid + 1; > + else > + high = mid - 1; > + mid = (low + high) / 2; > + } > + > + /* > + * The 5C granularity provided by the table is too much. Let's > + * assume that the relationship between sensor readings and > + * temperature between 2 table entries is linear and interpolate > + * to produce less granular result. > + */ > + num = v3_code_table[mid].temp - v3_code_table[mid - 1].temp; > + num *= code - v3_code_table[mid - 1].code; > + denom = v3_code_table[mid].code - v3_code_table[mid - 1].code; > + *temp = v3_code_table[mid - 1].temp + (num / denom); > + > + return 0; > +} Do not add the above function, as it is a code duplication of rk_tsadcv2_code_to_temp. The above function, functionality wise, the same as rk_tsadcv2_code_to_temp, except that it uses a different table. The suggestion is to pass the table as parameter to rk_tsadcv2_code_to_temp, then just reuse rk_tsadcv2_code_to_temp in both cases. Would that work for you? > + > /** > - * rk_tsadcv2_initialize - initialize TASDC Controller > - * (1) Set TSADCV2_AUTO_PERIOD, configure the interleave between > - * every two accessing of TSADC in normal operation. > - * (2) Set TSADCV2_AUTO_PERIOD_HT, configure the interleave between > - * every two accessing of TSADC after the temperature is higher > - * than COM_SHUT or COM_INT. > - * (3) Set TSADCV2_HIGH_INT_DEBOUNCE and TSADC_HIGHT_TSHUT_DEBOUNCE, > - * if the temperature is higher than COMP_INT or COMP_SHUT for > - * "debounce" times, TSADC controller will generate interrupt or TSHUT. > + * rk_tsadcv2_initialize - initialize TASDC Controller. > + * > + * (1) Set TSADC_V2_AUTO_PERIOD: > + * Configure the interleave between every two accessing of > + * TSADC in normal operation. > + * > + * (2) Set TSADCV2_AUTO_PERIOD_HT: > + * Configure the interleave between every two accessing of > + * TSADC after the temperature is higher than COM_SHUT or COM_INT. > + * > + * (3) Set TSADCV2_HIGH_INT_DEBOUNCE and TSADC_HIGHT_TSHUT_DEBOUNCE: > + * If the temperature is higher than COMP_INT or COMP_SHUT for > + * "debounce" times, TSADC controller will generate interrupt or TSHUT. > */ > static void rk_tsadcv2_initialize(void __iomem *regs, > enum tshut_polarity tshut_polarity) > @@ -286,6 +379,15 @@ static void rk_tsadcv2_control(void __iomem *regs, bool enable) > writel_relaxed(val, regs + TSADCV2_AUTO_CON); > } > > +static int rk_tsadcv3_get_temp(int chn, void __iomem *regs, int *temp) > +{ > + u32 val; > + > + val = readl_relaxed(regs + TSADCV2_DATA(chn)); > + > + return rk_tsadcv3_code_to_temp(val, temp); > +} Same suggestion here. This function looks exactly the same as rk_tsadcv2_get_temp. can you just pass the chip as parameter, then? > + > static int rk_tsadcv2_get_temp(int chn, void __iomem *regs, int *temp) > { > u32 val; > @@ -295,12 +397,11 @@ static int rk_tsadcv2_get_temp(int chn, void __iomem *regs, int *temp) > return rk_tsadcv2_code_to_temp(val, temp); > } > > -static void rk_tsadcv2_tshut_temp(int chn, void __iomem *regs, long temp) > +static void rk_tsadcv2_tshut_value(int chn, void __iomem *regs, u32 value) > { > - u32 tshut_value, val; > + u32 val; > > - tshut_value = rk_tsadcv2_temp_to_code(temp); > - writel_relaxed(tshut_value, regs + TSADCV2_COMP_SHUT(chn)); > + writel_relaxed(value, regs + TSADCV2_COMP_SHUT(chn)); > > /* TSHUT will be valid */ > val = readl_relaxed(regs + TSADCV2_AUTO_CON); > @@ -337,8 +438,31 @@ static const struct rockchip_tsadc_chip rk3288_tsadc_data = { > .irq_ack = rk_tsadcv2_irq_ack, > .control = rk_tsadcv2_control, > .get_temp = rk_tsadcv2_get_temp, > - .set_tshut_temp = rk_tsadcv2_tshut_temp, > + .set_tshut_value = rk_tsadcv2_tshut_value, > + .set_tshut_mode = rk_tsadcv2_tshut_mode, > + > + .table = v2_code_table, > + .table_num = ARRAY_SIZE(v2_code_table), > +}; > + > +static const struct rockchip_tsadc_chip rk3368_tsadc_data = { > + .chn_id[SENSOR_CPU] = 0, /* cpu sensor is channel 0 */ > + .chn_id[SENSOR_GPU] = 1, /* gpu sensor is channel 1 */ > + .chn_num = 2, /* two channels for tsadc */ > + > + .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */ > + .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */ > + .tshut_temp = 95000, > + > + .initialize = rk_tsadcv2_initialize, > + .irq_ack = rk_tsadcv2_irq_ack, > + .control = rk_tsadcv2_control, > + .get_temp = rk_tsadcv3_get_temp, > + .set_tshut_value = rk_tsadcv2_tshut_value, > .set_tshut_mode = rk_tsadcv2_tshut_mode, > + > + .table = v3_code_table, > + .table_num = ARRAY_SIZE(v3_code_table), > }; > > static const struct of_device_id of_rockchip_thermal_match[] = { > @@ -346,6 +470,10 @@ static const struct of_device_id of_rockchip_thermal_match[] = { > .compatible = "rockchip,rk3288-tsadc", > .data = (void *)&rk3288_tsadc_data, > }, > + { > + .compatible = "rockchip,rk3368-tsadc", > + .data = (void *)&rk3368_tsadc_data, > + }, > { /* end */ }, > }; > MODULE_DEVICE_TABLE(of, of_rockchip_thermal_match); > @@ -458,8 +586,10 @@ rockchip_thermal_register_sensor(struct platform_device *pdev, > const struct rockchip_tsadc_chip *tsadc = thermal->chip; > int error; > > + u32 tshut_value = rk_tsadcv2_temp_to_code(tsadc, thermal->tshut_temp); > + > tsadc->set_tshut_mode(id, thermal->regs, thermal->tshut_mode); > - tsadc->set_tshut_temp(id, thermal->regs, thermal->tshut_temp); > + tsadc->set_tshut_value(id, thermal->regs, tshut_value); > > sensor->thermal = thermal; > sensor->id = id; > @@ -660,6 +790,9 @@ static int __maybe_unused rockchip_thermal_resume(struct device *dev) > int i; > int error; > > + u32 tshut_value = rk_tsadcv2_temp_to_code(thermal->chip, > + thermal->tshut_temp); > + > error = clk_enable(thermal->clk); > if (error) > return error; > @@ -677,8 +810,8 @@ static int __maybe_unused rockchip_thermal_resume(struct device *dev) > > thermal->chip->set_tshut_mode(id, thermal->regs, > thermal->tshut_mode); > - thermal->chip->set_tshut_temp(id, thermal->regs, > - thermal->tshut_temp); > + thermal->chip->set_tshut_value(id, thermal->regs, > + tshut_value); > } > > thermal->chip->control(thermal->regs, true); > -- > 1.9.1 > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/