From patchwork Wed Dec 30 08:43:36 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Lindgren X-Patchwork-Id: 11993061 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 268A6C433E0 for ; Wed, 30 Dec 2020 08:44:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E39EB21D1B for ; Wed, 30 Dec 2020 08:44:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726289AbgL3Iob (ORCPT ); Wed, 30 Dec 2020 03:44:31 -0500 Received: from muru.com ([72.249.23.125]:40498 "EHLO muru.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725853AbgL3Ioa (ORCPT ); Wed, 30 Dec 2020 03:44:30 -0500 Received: from hillo.muru.com (localhost [127.0.0.1]) by muru.com (Postfix) with ESMTP id 9940380BA; Wed, 30 Dec 2020 08:44:01 +0000 (UTC) From: Tony Lindgren To: Amit Kucheria , Daniel Lezcano , Zhang Rui Cc: Eduardo Valentin , Keerthy , linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, Adam Ford , Carl Philipp Klemm , Merlijn Wajer , Pavel Machek , Peter Ujfalusi , Sebastian Reichel Subject: [PATCH 1/3] thermal: ti-soc-thermal: Fix stuck sensor with continuous mode for 4430 Date: Wed, 30 Dec 2020 10:43:36 +0200 Message-Id: <20201230084338.19410-1-tony@atomide.com> X-Mailer: git-send-email 2.29.2 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org At least for 4430, trying to use the single conversion mode eventually hangs the thermal sensor. This can be quite easily seen with errors: thermal thermal_zone0: failed to read out thermal zone (-5) Also, trying to read the temperature shows a stuck value with: $ while true; do cat /sys/class/thermal/thermal_zone0/temp; done Where the temperature is not rising at all with the busy loop. Additionally, the EOCZ (end of conversion) bit is not rising on 4430 in single conversion mode while it works fine in continuous conversion mode. It is also possible that the hung temperature sensor can affect the thermal shutdown alert too. Let's fix the issue by adding TI_BANDGAP_FEATURE_CONT_MODE_ONLY flag and use it for 4430. Note that we also need to add udelay to for the EOCZ (end of conversion) bit polling as otherwise we have it time out too early on 4430. We'll be changing the loop to use iopoll in the following clean-up patch. Cc: Adam Ford Cc: Carl Philipp Klemm Cc: Eduardo Valentin Cc: Merlijn Wajer Cc: Pavel Machek Cc: Peter Ujfalusi Cc: Sebastian Reichel Signed-off-by: Tony Lindgren --- drivers/thermal/ti-soc-thermal/omap4-thermal-data.c | 3 ++- drivers/thermal/ti-soc-thermal/ti-bandgap.c | 9 +++++++-- drivers/thermal/ti-soc-thermal/ti-bandgap.h | 2 ++ 3 files changed, 11 insertions(+), 3 deletions(-) diff --git a/drivers/thermal/ti-soc-thermal/omap4-thermal-data.c b/drivers/thermal/ti-soc-thermal/omap4-thermal-data.c --- a/drivers/thermal/ti-soc-thermal/omap4-thermal-data.c +++ b/drivers/thermal/ti-soc-thermal/omap4-thermal-data.c @@ -58,7 +58,8 @@ omap4430_adc_to_temp[OMAP4430_ADC_END_VALUE - OMAP4430_ADC_START_VALUE + 1] = { const struct ti_bandgap_data omap4430_data = { .features = TI_BANDGAP_FEATURE_MODE_CONFIG | TI_BANDGAP_FEATURE_CLK_CTRL | - TI_BANDGAP_FEATURE_POWER_SWITCH, + TI_BANDGAP_FEATURE_POWER_SWITCH | + TI_BANDGAP_FEATURE_CONT_MODE_ONLY, .fclock_name = "bandgap_fclk", .div_ck_name = "bandgap_fclk", .conv_table = omap4430_adc_to_temp, diff --git a/drivers/thermal/ti-soc-thermal/ti-bandgap.c b/drivers/thermal/ti-soc-thermal/ti-bandgap.c --- a/drivers/thermal/ti-soc-thermal/ti-bandgap.c +++ b/drivers/thermal/ti-soc-thermal/ti-bandgap.c @@ -15,6 +15,7 @@ #include #include #include +#include #include #include #include @@ -605,8 +606,10 @@ ti_bandgap_force_single_read(struct ti_bandgap *bgp, int id) u32 counter = 1000; struct temp_sensor_registers *tsr; - /* Select single conversion mode */ - if (TI_BANDGAP_HAS(bgp, MODE_CONFIG)) + /* Select continuous or single conversion mode */ + if (TI_BANDGAP_HAS(bgp, CONT_MODE_ONLY)) + RMW_BITS(bgp, id, bgap_mode_ctrl, mode_ctrl_mask, 1); + else if (TI_BANDGAP_HAS(bgp, MODE_CONFIG)) RMW_BITS(bgp, id, bgap_mode_ctrl, mode_ctrl_mask, 0); /* Start of Conversion = 1 */ @@ -619,6 +622,7 @@ ti_bandgap_force_single_read(struct ti_bandgap *bgp, int id) if (ti_bandgap_readl(bgp, tsr->temp_sensor_ctrl) & tsr->bgap_eocz_mask) break; + udelay(1); } /* Start of Conversion = 0 */ @@ -630,6 +634,7 @@ ti_bandgap_force_single_read(struct ti_bandgap *bgp, int id) if (!(ti_bandgap_readl(bgp, tsr->temp_sensor_ctrl) & tsr->bgap_eocz_mask)) break; + udelay(1); } return 0; diff --git a/drivers/thermal/ti-soc-thermal/ti-bandgap.h b/drivers/thermal/ti-soc-thermal/ti-bandgap.h --- a/drivers/thermal/ti-soc-thermal/ti-bandgap.h +++ b/drivers/thermal/ti-soc-thermal/ti-bandgap.h @@ -280,6 +280,7 @@ struct ti_temp_sensor { * has Errata 814 * TI_BANDGAP_FEATURE_UNRELIABLE - used when the sensor readings are too * inaccurate. + * TI_BANDGAP_FEATURE_CONT_MODE_ONLY - used when single mode hangs the sensor * 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. */ @@ -295,6 +296,7 @@ struct ti_temp_sensor { #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_FEATURE_CONT_MODE_ONLY BIT(12) #define TI_BANDGAP_HAS(b, f) \ ((b)->conf->features & TI_BANDGAP_FEATURE_ ## f) From patchwork Wed Dec 30 08:43:37 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Lindgren X-Patchwork-Id: 11993063 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1B678C433E9 for ; Wed, 30 Dec 2020 08:45:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DDB4321D1B for ; Wed, 30 Dec 2020 08:45:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726400AbgL3Ioh (ORCPT ); Wed, 30 Dec 2020 03:44:37 -0500 Received: from muru.com ([72.249.23.125]:40518 "EHLO muru.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726350AbgL3Iog (ORCPT ); Wed, 30 Dec 2020 03:44:36 -0500 Received: from hillo.muru.com (localhost [127.0.0.1]) by muru.com (Postfix) with ESMTP id 00282812F; Wed, 30 Dec 2020 08:44:07 +0000 (UTC) From: Tony Lindgren To: Amit Kucheria , Daniel Lezcano , Zhang Rui Cc: Eduardo Valentin , Keerthy , linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, Adam Ford , Carl Philipp Klemm , Merlijn Wajer , Pavel Machek , Peter Ujfalusi , Sebastian Reichel Subject: [PATCH 2/3] thermal: ti-soc-thermal: Simplify polling with iopoll Date: Wed, 30 Dec 2020 10:43:37 +0200 Message-Id: <20201230084338.19410-2-tony@atomide.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201230084338.19410-1-tony@atomide.com> References: <20201230084338.19410-1-tony@atomide.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org We can use iopoll for checking the EOCZ (end of conversion) bit. Cc: Adam Ford Cc: Carl Philipp Klemm Cc: Eduardo Valentin Cc: Merlijn Wajer Cc: Pavel Machek Cc: Peter Ujfalusi Cc: Sebastian Reichel Signed-off-by: Tony Lindgren --- drivers/thermal/ti-soc-thermal/ti-bandgap.c | 30 ++++++++++----------- 1 file changed, 14 insertions(+), 16 deletions(-) diff --git a/drivers/thermal/ti-soc-thermal/ti-bandgap.c b/drivers/thermal/ti-soc-thermal/ti-bandgap.c --- a/drivers/thermal/ti-soc-thermal/ti-bandgap.c +++ b/drivers/thermal/ti-soc-thermal/ti-bandgap.c @@ -15,7 +15,6 @@ #include #include #include -#include #include #include #include @@ -27,6 +26,7 @@ #include #include #include +#include #include #include #include @@ -603,8 +603,9 @@ void *ti_bandgap_get_sensor_data(struct ti_bandgap *bgp, int id) static int ti_bandgap_force_single_read(struct ti_bandgap *bgp, int id) { - u32 counter = 1000; struct temp_sensor_registers *tsr; + int error; + u32 val; /* Select continuous or single conversion mode */ if (TI_BANDGAP_HAS(bgp, CONT_MODE_ONLY)) @@ -615,27 +616,24 @@ ti_bandgap_force_single_read(struct ti_bandgap *bgp, int id) /* Start of Conversion = 1 */ RMW_BITS(bgp, id, temp_sensor_ctrl, bgap_soc_mask, 1); - /* Wait for EOCZ going up */ tsr = bgp->conf->sensors[id].registers; - while (--counter) { - if (ti_bandgap_readl(bgp, tsr->temp_sensor_ctrl) & - tsr->bgap_eocz_mask) - break; - udelay(1); - } + /* Wait for EOCZ going up */ + error = readl_poll_timeout_atomic(bgp->base + tsr->temp_sensor_ctrl, + val, val & tsr->bgap_eocz_mask, + 1, 1000); + if (error) + dev_warn(bgp->dev, "eocz timed out waiting high\n"); /* Start of Conversion = 0 */ RMW_BITS(bgp, id, temp_sensor_ctrl, bgap_soc_mask, 0); /* Wait for EOCZ going down */ - counter = 1000; - while (--counter) { - if (!(ti_bandgap_readl(bgp, tsr->temp_sensor_ctrl) & - tsr->bgap_eocz_mask)) - break; - udelay(1); - } + error = readl_poll_timeout_atomic(bgp->base + tsr->temp_sensor_ctrl, + val, !(val & tsr->bgap_eocz_mask), + 1, 1000); + if (error) + dev_warn(bgp->dev, "eocz timed out waiting low\n"); return 0; } From patchwork Wed Dec 30 08:43:38 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Lindgren X-Patchwork-Id: 11993065 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C9F7FC4332D for ; Wed, 30 Dec 2020 08:45:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7BEEB207A9 for ; Wed, 30 Dec 2020 08:45:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726470AbgL3Iom (ORCPT ); Wed, 30 Dec 2020 03:44:42 -0500 Received: from muru.com ([72.249.23.125]:40538 "EHLO muru.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726350AbgL3Iol (ORCPT ); Wed, 30 Dec 2020 03:44:41 -0500 Received: from hillo.muru.com (localhost [127.0.0.1]) by muru.com (Postfix) with ESMTP id 39D4381B8; Wed, 30 Dec 2020 08:44:13 +0000 (UTC) From: Tony Lindgren To: Amit Kucheria , Daniel Lezcano , Zhang Rui Cc: Eduardo Valentin , Keerthy , linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, Adam Ford , Carl Philipp Klemm , Merlijn Wajer , Pavel Machek , Peter Ujfalusi , Sebastian Reichel Subject: [PATCH 3/3] thermal: ti-soc-thermal: Use non-inverted define for omap4 Date: Wed, 30 Dec 2020 10:43:38 +0200 Message-Id: <20201230084338.19410-3-tony@atomide.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201230084338.19410-1-tony@atomide.com> References: <20201230084338.19410-1-tony@atomide.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org When we set bit 10 high we use continuous mode and not single mode. Let's correct this to avoid confusion. No functional changes here, the code does the right thing with bit 10. Cc: Adam Ford Cc: Carl Philipp Klemm Cc: Eduardo Valentin Cc: Merlijn Wajer Cc: Pavel Machek Cc: Peter Ujfalusi Cc: Sebastian Reichel Signed-off-by: Tony Lindgren --- drivers/thermal/ti-soc-thermal/omap4-thermal-data.c | 4 ++-- drivers/thermal/ti-soc-thermal/omap4xxx-bandgap.h | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/thermal/ti-soc-thermal/omap4-thermal-data.c b/drivers/thermal/ti-soc-thermal/omap4-thermal-data.c --- a/drivers/thermal/ti-soc-thermal/omap4-thermal-data.c +++ b/drivers/thermal/ti-soc-thermal/omap4-thermal-data.c @@ -24,7 +24,7 @@ omap4430_mpu_temp_sensor_registers = { .bgap_dtemp_mask = OMAP4430_BGAP_TEMP_SENSOR_DTEMP_MASK, .bgap_mode_ctrl = OMAP4430_TEMP_SENSOR_CTRL_OFFSET, - .mode_ctrl_mask = OMAP4430_SINGLE_MODE_MASK, + .mode_ctrl_mask = OMAP4430_CONTINUOUS_MODE_MASK, .bgap_efuse = OMAP4430_FUSE_OPP_BGAP, }; @@ -97,7 +97,7 @@ omap4460_mpu_temp_sensor_registers = { .mask_cold_mask = OMAP4460_MASK_COLD_MASK, .bgap_mode_ctrl = OMAP4460_BGAP_CTRL_OFFSET, - .mode_ctrl_mask = OMAP4460_SINGLE_MODE_MASK, + .mode_ctrl_mask = OMAP4460_CONTINUOUS_MODE_MASK, .bgap_counter = OMAP4460_BGAP_COUNTER_OFFSET, .counter_mask = OMAP4460_COUNTER_MASK, diff --git a/drivers/thermal/ti-soc-thermal/omap4xxx-bandgap.h b/drivers/thermal/ti-soc-thermal/omap4xxx-bandgap.h --- a/drivers/thermal/ti-soc-thermal/omap4xxx-bandgap.h +++ b/drivers/thermal/ti-soc-thermal/omap4xxx-bandgap.h @@ -40,7 +40,7 @@ /* OMAP4430.TEMP_SENSOR bits */ #define OMAP4430_BGAP_TEMPSOFF_MASK BIT(12) #define OMAP4430_BGAP_TSHUT_MASK BIT(11) -#define OMAP4430_SINGLE_MODE_MASK BIT(10) +#define OMAP4430_CONTINUOUS_MODE_MASK BIT(10) #define OMAP4430_BGAP_TEMP_SENSOR_SOC_MASK BIT(9) #define OMAP4430_BGAP_TEMP_SENSOR_EOCZ_MASK BIT(8) #define OMAP4430_BGAP_TEMP_SENSOR_DTEMP_MASK (0xff << 0) @@ -113,7 +113,7 @@ #define OMAP4460_BGAP_TEMP_SENSOR_DTEMP_MASK (0x3ff << 0) /* OMAP4460.BANDGAP_CTRL bits */ -#define OMAP4460_SINGLE_MODE_MASK BIT(31) +#define OMAP4460_CONTINUOUS_MODE_MASK BIT(31) #define OMAP4460_MASK_HOT_MASK BIT(1) #define OMAP4460_MASK_COLD_MASK BIT(0)