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[90.182.112.124]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-49cf75ce49esm641964095e9.1.2026.09.08.01.01.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 08 Sep 2026 01:01:26 -0700 (PDT) Date: Tue, 8 Sep 2026 10:01:23 +0200 From: Joshua Crofts To: Chang Yu Cc: Jonathan Cameron , David Lechner , Nuno =?ISO-8859-1?Q?S=E1?= , Andy Shevchenko , Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Shi Hao , "Jose A. Perez de Azpillaga" Subject: Re: [PATCH v2 2/2] iio: light: add AS7343 multi-spectral sensor driver Message-ID: <20260908100123.00005af7@gmail.com> In-Reply-To: <20260907210042.32552-3-marcus.yu.56@gmail.com> References: <20260907210042.32552-1-marcus.yu.56@gmail.com> <20260907210042.32552-3-marcus.yu.56@gmail.com> X-Mailer: Claws Mail 4.4.0 (GTK 3.24.51; x86_64-w64-mingw32) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Hi Chang, Please check out Sashiko's review, there are some PM runtime things that should be resolved + some comments inline. https://sashiko.dev/#/patchset/20260907210042.32552-1-marcus.yu.56%40gmail.com Thanks! Josh On Mon, 7 Sep 2026 14:00:42 -0700 Chang Yu wrote: ... > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include + bits.h, types.h, (asm headers go separately, as IIO headers). > + > +#include > + ... > +struct as7343_data { > + struct regmap *regmap; > +}; > + > +static int as7343_read_raw(struct iio_dev *indio_dev, > + struct iio_chan_spec const *chan, int *val, > + int *val2, long mask) > +{ > + struct as7343_data *data = iio_priv(indio_dev); > + int ret; > + unsigned int unused; > + u16 result; > + > + switch (mask) { > + case IIO_CHAN_INFO_RAW: { The device should resume here, otherwise you'll be reading while suspended. > + /* > + * Reading ASTATUS latches all data registers to this read. > + * We don't care about the returned saturation/gain status for > + * now. > + */ Sashiko points out that a mutex here would come in handy. If you're going to add a mutex, use the guard(mutex) macro for automatic unlocking on scope exit. > + ret = regmap_read(data->regmap, AS7343_ASTATUS, &unused); > + if (ret) > + return ret; > + > + ret = regmap_bulk_read(data->regmap, chan->address, &result, 2); > + if (ret) > + return ret; > + > + *val = le16_to_cpu(result); > + return IIO_VAL_INT; > + } > + > + default: > + return -EINVAL; > + } > +} > + > +static const char *as7343_channel_label(struct iio_chan_spec const *chan) > +{ > + switch (chan->channel) { > + case AS7343_CHAN_IDX_FZ: > + return "FZ"; > + case AS7343_CHAN_IDX_FY: > + return "FY"; > + case AS7343_CHAN_IDX_FXL: > + return "FXL"; > + case AS7343_CHAN_IDX_NIR: > + return "NIR"; > + case AS7343_CHAN_IDX_F2: > + return "F2"; > + case AS7343_CHAN_IDX_F3: > + return "F3"; > + case AS7343_CHAN_IDX_F4: > + return "F4"; > + case AS7343_CHAN_IDX_F6: > + return "F6"; > + case AS7343_CHAN_IDX_F1: > + return "F1"; > + case AS7343_CHAN_IDX_F7: > + return "F7"; > + case AS7343_CHAN_IDX_F8: > + return "F8"; > + case AS7343_CHAN_IDX_F5: > + return "F5"; > + default: > + return NULL; > + } > +} > + > +static int as7343_read_label(struct iio_dev *indio_dev, > + struct iio_chan_spec const *chan, char *label) > +{ > + const char *name; > + > + name = as7343_channel_label(chan); > + if (!name) > + return -EINVAL; A blank line here would be better. > + return sysfs_emit(label, "%s\n", name); > +} > + > +static const struct iio_info as7343_info = { > + .read_raw = as7343_read_raw, > + .read_label = as7343_read_label, > +}; > + > +static const struct regmap_config as7343_regmap_config = { > + .name = "as7343", > + .reg_bits = 8, > + .val_bits = 8, > + .max_register = AS7343_MAX, > + .reg_format_endian = REGMAP_ENDIAN_LITTLE, > + .val_format_endian = REGMAP_ENDIAN_LITTLE, > + .cache_type = REGCACHE_NONE, > +}; > + > +static int as7343_setup_device(struct device *dev, struct as7343_data *data) > +{ > + unsigned int val; > + u16 step; __le16 instead of u16. > + int ret; > + > + /* Power on */ > + ret = regmap_set_bits(data->regmap, AS7343_ENABLE, AS7343_ENABLE_PON); > + if (ret) > + return ret; > + > + /* Need to set REG_BANK to 1 before we can access ID */ > + ret = regmap_set_bits(data->regmap, AS7343_CFG0, AS7343_CFG0_REG_BANK); > + if (ret) > + return ret; > + > + ret = regmap_read(data->regmap, AS7343_ID, &val); You should check the value of ret as well in case of a regmap failure. -- Kind regards, Joshua Crofts