From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8595B3FB09; Thu, 23 Nov 2023 16:32:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Hp8HVRI2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8BE75C433CA; Thu, 23 Nov 2023 16:32:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1700757178; bh=zPsWJqwWfxO0CDcsvsukWva+BtzQ1ZCrq2r/akLCBZ4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Hp8HVRI2nXh8VRvYSc8w+8dzmeXhxL4Tbf+eBzAD3HEbXSqqs98sOGZu7Z/z2pg2L B5e28h98kmeR/vEiT3h6sXQrbEYvV11yv7m3QzetjHAYwBxgLSJ4B+R2rQBUQI31NL Pm5jGYRsV0HCRWbEqSlC39nFo+Ucmvi4wipFETCueJnGlUGmkZ22lCimBzAkAO/vFR YFU6yQ+VNld+zrcOw+ncnMYnZTCnRyzERR6IOKJ6j99PAj1Bw0vGWRZU5IzSIfPosv s/gvX9Qd3PalXHIHPOW9e/Fn1m6JmSFWvYrfjt6blIFmaYyRo0gou1YZXonCvNkzC5 1BVpsaTatdjMw== Date: Thu, 23 Nov 2023 16:32:52 +0000 From: Lee Jones To: Dmitry Rokosov Cc: pavel@ucw.cz, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, andy.shevchenko@gmail.com, kernel@sberdevices.ru, rockosov@gmail.com, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-leds@vger.kernel.org, George Stark Subject: Re: [PATCH v4 04/11] leds: aw200xx: calculate dts property display_rows in the driver Message-ID: <20231123163252.GF1354538@google.com> References: <20231121202835.28152-1-ddrokosov@salutedevices.com> <20231121202835.28152-5-ddrokosov@salutedevices.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20231121202835.28152-5-ddrokosov@salutedevices.com> On Tue, 21 Nov 2023, Dmitry Rokosov wrote: > From: George Stark > > Get rid of device tree property "awinic,display-rows". The property > value actually means number of current switches and depends on how leds Nit: LEDs > are connected to the device. It should be calculated manually by max > used led number. In the same way it is computed automatically now. As above - I won't mention this again. > Max used led is taken from led definition subnodes. > > Signed-off-by: George Stark > Signed-off-by: Dmitry Rokosov > --- > drivers/leds/leds-aw200xx.c | 39 +++++++++++++++++++++++++------------ > 1 file changed, 27 insertions(+), 12 deletions(-) > > diff --git a/drivers/leds/leds-aw200xx.c b/drivers/leds/leds-aw200xx.c > index 7762b3a132ac..4bce5e7381c0 100644 > --- a/drivers/leds/leds-aw200xx.c > +++ b/drivers/leds/leds-aw200xx.c > @@ -379,6 +379,30 @@ static void aw200xx_disable(const struct aw200xx *const chip) > return gpiod_set_value_cansleep(chip->hwen, 0); > } > > +static bool aw200xx_probe_get_display_rows(struct device *dev, struct aw200xx *chip) > +{ > + struct fwnode_handle *child; > + u32 max_source = 0; > + > + device_for_each_child_node(dev, child) { > + u32 source; > + int ret; > + > + ret = fwnode_property_read_u32(child, "reg", &source); > + if (ret || source >= chip->cdef->channels) Shouldn't the second clause fail instantly? > + continue; > + > + max_source = max(max_source, source); > + } > + > + if (!max_source) Since max_source is an integer, please use an '== 0' comparison. > + return false; > + > + chip->display_rows = max_source / chip->cdef->display_size_columns + 1; > + > + return true; > +} > + > static int aw200xx_probe_fw(struct device *dev, struct aw200xx *chip) > { > struct fwnode_handle *child; > @@ -386,18 +410,9 @@ static int aw200xx_probe_fw(struct device *dev, struct aw200xx *chip) > int ret; > int i; > > - ret = device_property_read_u32(dev, "awinic,display-rows", > - &chip->display_rows); > - if (ret) > - return dev_err_probe(dev, ret, > - "Failed to read 'display-rows' property\n"); > - > - if (!chip->display_rows || > - chip->display_rows > chip->cdef->display_size_rows_max) { > - return dev_err_probe(dev, ret, > - "Invalid leds display size %u\n", > - chip->display_rows); > - } > + if (!aw200xx_probe_get_display_rows(dev, chip)) Function calls in side if() statements in general is rough. Please break it out and use 'ret' as we usually do. > + return dev_err_probe(dev, -EINVAL, Make this the return value from aw200xx_probe_get_display_rows() and use 'ret' instead. > + "No valid led definitions found\n"); > > current_max = aw200xx_imax_from_global(chip, AW200XX_IMAX_MAX_uA); > current_min = aw200xx_imax_from_global(chip, AW200XX_IMAX_MIN_uA); > -- > 2.36.0 > -- Lee Jones [李琼斯]