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Fri, 17 Jul 2026 18:02:11 -0700 (PDT) X-Received: by 2002:a17:903:458d:b0:2ca:17e2:2acc with SMTP id d9443c01a7336-2cf348bbeeamr53782445ad.21.1784336530589; Fri, 17 Jul 2026 18:02:10 -0700 (PDT) Received: from jic23-huawei ([50.35.46.84]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2cf342e3a8esm19632685ad.0.2026.07.17.18.02.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 17 Jul 2026 18:02:09 -0700 (PDT) Date: Sat, 18 Jul 2026 02:02:03 +0100 From: Jonathan Cameron To: Jakub Szczudlo Cc: linux-iio@vger.kernel.org, dlechner@baylibre.com, nuno.sa@analog.com, andy@kernel.org, marcelo.schmitt@analog.com, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, mike.looijmans@topic.nl, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, jorge.marques@analog.com, antoniu.miclaus@analog.com, mazziesaccount@gmail.com, jishnu.prakash@oss.qualcomm.com, duje@dujemihanovic.xyz, wens@kernel.org, sakari.ailus@linux.intel.com, linusw@kernel.org Subject: Re: [PATCH v8 3/3] iio: adc: ti-ads1100: Add ti-ads1110 support to ti-ads1100 driver Message-ID: <20260718020145.72762d9d@jic23-huawei> In-Reply-To: <20260717185033.246580-4-jakubszczudlo40@gmail.com> References: <20260717185033.246580-1-jakubszczudlo40@gmail.com> <20260717185033.246580-4-jakubszczudlo40@gmail.com> X-Mailer: Claws Mail 4.4.0 (GTK 3.24.52; x86_64-pc-linux-gnu) Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=RbqgzVtv c=1 sm=1 tr=0 ts=6a5ad094 cx=c_pps a=cmESyDAEBpBGqyK7t0alAg==:117 a=qC1CW/w66vtJz1P9yTJxNA==:17 a=kj9zAlcOel0A:10 a=RAioF0-LDSMA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=gowsoOTTUOVcmtlkKump:22 a=pGLkceISAAAA:8 a=mcsFP2XhKlOFKfFfNWQA:9 a=CjuIK1q_8ugA:10 a=1OuFwYUASf3TG4hYMiVC:22 X-Proofpoint-GUID: dTmX1XgD244nz8bZ7RsCLvqf9B5CPWs0 X-Proofpoint-ORIG-GUID: dTmX1XgD244nz8bZ7RsCLvqf9B5CPWs0 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzE4MDAwNiBTYWx0ZWRfX+7gaLyrIZ89Y OC083VoN+o42w+Y6M0MiPNBZNg7LDCnR9wPj7o/HB9lBWmje9fupXCf+2v6DfNY+g6nuvlTvl+8 oqyXJu44jaEvm1bWz3f5ZoCN8PRuRNbh9P297HyojKIR3vlZ9/PI3Na3Ajd18epaPPMSEP4ad8x +5Io1P3ObwPqY9bBZcBnQxg3PIiDfexa3P5i5moDKGqBA9gZFeUv/fysv3E3nOqRow1xiwI5iwR 4cUAbMFTz5TFF16ppsC+9WZMf7VtFo2hKAVfIjHsLgKpPGs6grfIcBQDhCDLZavy9XaNvmgCfVX b+5CYtBYdsQWR3jYZwD6yAnxv8CqfCM251RjeTofsk0+K1mH6D/0cBzeI6chktd41OR4JVb/Z27 Nb18pqsQBlRZEkLC051d8yG0sp5XNvw0CRmb7zUlMtOJrn32GUhEETrZQbAsUECPvQ+ncUTyCD4 fXTKhExgiMR87nzlYwA== X-Proofpoint-Spam-Info: AW1haW4tMjYwNzE4MDAwNiBTYWx0ZWRfX668KDaGMnLW2 MgDL5/gK5lCLUKIozkREGCa3ibPtanUPb31Bp2fGGTdPc+KsOEvs1nF29YZefCvw1nbyjC0SClx 9rK8QX1HF2jZYhFGS2Y5vh9JTp+0HIg= X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-17_07,2026-07-17_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 clxscore=1015 suspectscore=0 priorityscore=1501 lowpriorityscore=0 impostorscore=0 bulkscore=0 phishscore=0 adultscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607180006 On Fri, 17 Jul 2026 20:50:33 +0200 Jakub Szczudlo wrote: > Add ADS1110 support that have faster datarate than ADS1100, it also uses > internal voltage reference of 2.048V for measurement. > > Signed-off-by: Jakub Szczudlo Hi Jakub, Seems some stuff in here should be in patch 1. Thanks Jonathan > diff --git a/drivers/iio/adc/ti-ads1100.c b/drivers/iio/adc/ti-ads1100.c > index 363f790ca5d5..19533667e6cd 100644 > --- a/drivers/iio/adc/ti-ads1100.c > +++ b/drivers/iio/adc/ti-ads1100.c ... > @@ -139,14 +177,16 @@ static int ads1100_new_data_is_ready(struct ads1100_data *data) > return ret; > } > > - return FIELD_GET(ADS1100_CFG_ST_BSY, buffer[2]) ? 0 : 1; > + return FIELD_GET(ADS1100_CFG_ST_BSY, buffer[2]); This change and the use below seem odd to be in this patch. I guess they should be back in patch 1. > } > > static int ads1100_poll_data_ready(struct ads1100_data *data) > { > - int data_rate_Hz = ads1100_data_rate[FIELD_GET(ADS1100_DR_MASK, data->config)]; > + int data_rate_index = FIELD_GET(ADS1100_DR_MASK, data->config); > + int data_rate_Hz = data->chip_info->available_data_rate_hz[data_rate_index]; > /* To be sure we wait 5 times more than data rate */ > - unsigned long wait_time_us = DIV_ROUND_CLOSEST(USEC_PER_SEC, 2 * data_rate_Hz); > + unsigned long period_us = DIV_ROUND_CLOSEST(USEC_PER_SEC, data_rate_Hz); > + unsigned long wait_time_us = 5UL * period_us; > int data_ready; > u8 buffer[3]; > int ret; > @@ -159,7 +199,7 @@ static int ads1100_poll_data_ready(struct ads1100_data *data) > } > > ret = readx_poll_timeout(ads1100_new_data_is_ready, data, > - data_ready, data_ready != 0, > + data_ready, data_ready == 0, see above. Seems to be in wrong patch. > wait_time_us, ADS1100_MAX_DRDY_TIMEOUT_US); Sashiko points out that the polling period is very long. Was this meant to be period_us? > if (data_ready < 0) > return data_ready;