Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755705AbbKFTAO (ORCPT ); Fri, 6 Nov 2015 14:00:14 -0500 Received: from mail-pa0-f47.google.com ([209.85.220.47]:34349 "EHLO mail-pa0-f47.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752679AbbKFTAL (ORCPT ); Fri, 6 Nov 2015 14:00:11 -0500 Date: Fri, 6 Nov 2015 11:00:08 -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 v2 4/9] thermal: rockchip: improve the conversion function Message-ID: <20151106190006.GB8202@localhost.localdomain> References: <1446700685-18017-1-git-send-email-wxt@rock-chips.com> <1446700685-18017-5-git-send-email-wxt@rock-chips.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1446700685-18017-5-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: 5991 Lines: 190 Hello Caesar, On Thu, Nov 05, 2015 at 01:18:00PM +0800, Caesar Wang wrote: > We should make the conversion table in as a parameter since the different > SoCs have the different conversionion table. > > Signed-off-by: Caesar Wang > --- > > Changes in v2: > - make the conversion table in as a parameter both code_to_temp > and temp_to_code function. Now it looks cleaner. Thanks. The comments below are probably not directly on this change. You may want to add a different patch that takes care of the suggestions that follows. > Series-changes: 1 > - As Dmitry comment, make the conversion table in as a parameter. > > Changes in v1: None > > drivers/thermal/rockchip_thermal.c | 82 +++++++++++++++++++++++++------------- > 1 file changed, 55 insertions(+), 27 deletions(-) > > diff --git a/drivers/thermal/rockchip_thermal.c b/drivers/thermal/rockchip_thermal.c > index bdf7063..e828f18 100644 > --- a/drivers/thermal/rockchip_thermal.c > +++ b/drivers/thermal/rockchip_thermal.c > @@ -58,6 +58,16 @@ enum sensor_id { > */ > #define SOC_MAX_SENSORS 2 > > +struct chip_tsadc_table { > + const struct tsadc_table *id; > + > + /* the array table size*/ > + unsigned int length; > + > + /* that analogic mask data */ > + unsigned long data_mask; Are you sure this need to be long? > +}; > + > struct rockchip_tsadc_chip { > /* The sensor id of chip correspond to the ADC channel */ > int chn_id[SOC_MAX_SENSORS]; > @@ -74,9 +84,14 @@ struct rockchip_tsadc_chip { > void (*control)(void __iomem *reg, bool on); > > /* Per-sensor methods */ > - int (*get_temp)(int chn, void __iomem *reg, int *temp); > - void (*set_tshut_temp)(int chn, void __iomem *reg, long temp); > + int (*get_temp)(struct chip_tsadc_table table, > + int chn, void __iomem *reg, int *temp); > + void (*set_tshut_temp)(struct chip_tsadc_table table, > + int chn, void __iomem *reg, long temp); Temperature is currently represented as int not long in the thermal framework. You may want to send a different patch that normalize the temperature representation in your driver (long -> int). > void (*set_tshut_mode)(int chn, void __iomem *reg, enum tshut_mode m); > + > + /* Per-table methods */ > + struct chip_tsadc_table table; > }; > > struct rockchip_thermal_sensor { > @@ -172,21 +187,22 @@ static const struct tsadc_table v2_code_table[] = { > {3421, 125000}, > }; > > -static u32 rk_tsadcv2_temp_to_code(long temp) > +static u32 rk_tsadcv2_temp_to_code(struct chip_tsadc_table table, > + long temp) Same comment here. > { > int high, low, mid; > > low = 0; > - high = ARRAY_SIZE(v2_code_table) - 1; > + high = table.length - 1; > mid = (high + low) / 2; > > - if (temp < v2_code_table[low].temp || temp > v2_code_table[high].temp) > + if (temp < table.id[low].temp || temp > table.id[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.id[mid].temp) > + return table.id[mid].code; > + else if (temp < table.id[mid].temp) > high = mid - 1; > else > low = mid + 1; > @@ -196,25 +212,26 @@ static u32 rk_tsadcv2_temp_to_code(long temp) > return 0; > } > > -static int rk_tsadcv2_code_to_temp(u32 code, int *temp) > +static int rk_tsadcv2_code_to_temp(struct chip_tsadc_table table, u32 code, > + int *temp) Here you are ok already. > { > unsigned int low = 1; > - unsigned int high = ARRAY_SIZE(v2_code_table) - 1; > + unsigned int high = table.length - 1; > unsigned int mid = (low + high) / 2; > unsigned int num; > unsigned long denom; > > - BUILD_BUG_ON(ARRAY_SIZE(v2_code_table) < 2); > + WARN_ON(table.length < 2); > > - code &= TSADCV2_DATA_MASK; > - if (code < v2_code_table[high].code) > + code &= table.data_mask; > + if (code < table.id[high].code) > return -EAGAIN; /* Incorrect reading */ > > while (low <= high) { > - if (code >= v2_code_table[mid].code && > - code < v2_code_table[mid - 1].code) > + if (code >= table.id[mid].code && > + code < table.id[mid - 1].code) > break; > - else if (code < v2_code_table[mid].code) > + else if (code < table.id[mid].code) > low = mid + 1; > else > high = mid - 1; > @@ -227,10 +244,10 @@ static int rk_tsadcv2_code_to_temp(u32 code, int *temp) > * temperature between 2 table entries is linear and interpolate > * to produce less granular result. > */ > - num = v2_code_table[mid].temp - v2_code_table[mid - 1].temp; > - num *= v2_code_table[mid - 1].code - code; > - denom = v2_code_table[mid - 1].code - v2_code_table[mid].code; > - *temp = v2_code_table[mid - 1].temp + (num / denom); > + num = table.id[mid].temp - v2_code_table[mid - 1].temp; > + num *= table.id[mid - 1].code - code; > + denom = table.id[mid - 1].code - table.id[mid].code; > + *temp = table.id[mid - 1].temp + (num / denom); > > return 0; > } > @@ -290,20 +307,22 @@ static void rk_tsadcv2_control(void __iomem *regs, bool enable) > writel_relaxed(val, regs + TSADCV2_AUTO_CON); > } > > -static int rk_tsadcv2_get_temp(int chn, void __iomem *regs, int *temp) > +static int rk_tsadcv2_get_temp(struct chip_tsadc_table table, > + int chn, void __iomem *regs, int *temp) > { > u32 val; > > val = readl_relaxed(regs + TSADCV2_DATA(chn)); > > - return rk_tsadcv2_code_to_temp(val, temp); > + return rk_tsadcv2_code_to_temp(table, val, temp); > } > > -static void rk_tsadcv2_tshut_temp(int chn, void __iomem *regs, long temp) > +static void rk_tsadcv2_tshut_temp(struct chip_tsadc_table table, > + int chn, void __iomem *regs, long temp) Here needs fixing. BR, Eduardo Valentin -- 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/