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Date: Wed, 20 Jul 2022 17:45:15 +0800
From: ChiYuan Huang <u0084500@...il.com>
To: Andy Shevchenko <andy.shevchenko@...il.com>
Cc: ChiaEn Wu <peterwu.pub@...il.com>,
Lee Jones <lee.jones@...aro.org>,
Daniel Thompson <daniel.thompson@...aro.org>,
Jingoo Han <jingoohan1@...il.com>, Pavel Machek <pavel@....cz>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Matthias Brugger <matthias.bgg@...il.com>,
Sebastian Reichel <sre@...nel.org>,
Chunfeng Yun <chunfeng.yun@...iatek.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Jonathan Cameron <jic23@...nel.org>,
Lars-Peter Clausen <lars@...afoo.de>,
Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nel.org>,
Guenter Roeck <linux@...ck-us.net>,
"Krogerus, Heikki" <heikki.krogerus@...ux.intel.com>,
Helge Deller <deller@....de>,
ChiaEn Wu <chiaen_wu@...htek.com>,
Alice Chen <alice_chen@...htek.com>,
cy_huang <cy_huang@...htek.com>,
dri-devel <dri-devel@...ts.freedesktop.org>,
Linux LED Subsystem <linux-leds@...r.kernel.org>,
devicetree <devicetree@...r.kernel.org>,
linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org>,
"moderated list:ARM/Mediatek SoC support"
<linux-mediatek@...ts.infradead.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Linux PM <linux-pm@...r.kernel.org>,
USB <linux-usb@...r.kernel.org>,
linux-iio <linux-iio@...r.kernel.org>,
"open list:FRAMEBUFFER LAYER" <linux-fbdev@...r.kernel.org>,
szuni chen <szunichen@...il.com>,
ChiYuan Huang <u0084500@...il.com>
Subject: Re: [PATCH v5 11/13] leds: mt6370: Add MediaTek MT6370 current sink
type LED Indicator support
On Fri, Jul 15, 2022 at 08:29:42PM +0200, Andy Shevchenko wrote:
> On Fri, Jul 15, 2022 at 1:29 PM ChiaEn Wu <peterwu.pub@...il.com> wrote:
> >
> > From: ChiYuan Huang <cy_huang@...htek.com>
> >
> > The MediaTek MT6370 is a highly-integrated smart power management IC,
> > which includes a single cell Li-Ion/Li-Polymer switching battery
> > charger, a USB Type-C & Power Delivery (PD) controller, dual
> > Flash LED current sources, a RGB LED driver, a backlight WLED driver,
> > a display bias driver and a general LDO for portable devices.
> >
> > In MediaTek MT6370, there are four channel current-sink RGB LEDs that
> > support hardware pattern for constant current, PWM, and breath mode.
> > Isink4 channel can also be used as a CHG_VIN power good indicator.
>
> ...
>
> > + This driver can also be built as a module. If so the module
>
> so, the
>
> > + will be called "leds-mt6370.ko".
>
> No ".ko".
>
> Why did you ignore these comments? Please go and fix _everywhere_ in
> your series.
> It's basically the rule of thumb, if the reviewer gives a comment
> against an occurrence of something, go through entire series and check
> if there are other places like commented one and address them all.
>
> ...
>
> > + * Author: Alice Chen <alice_chen@...htek.com>
>
> Strange, the commit message doesn't have a corresponding SoB, why?
>
Yes, there're two authors Alice and me.
I'll correct it in next.
> ...
>
> > +#define MT6370_PWM_DUTY 31
> > +#define MT6372_PMW_DUTY 255
>
> Looks like these are limits by hardware?
> Check with the datasheet if (BIT(x) - 1) makes more sense here.
>
> ...
>
> > + switch (led_no) {
> > + case MT6370_LED_ISNK1:
> > + sel_field = F_LED1_DUTY;
> > + break;
> > + case MT6370_LED_ISNK2:
> > + sel_field = F_LED2_DUTY;
> > + break;
> > + case MT6370_LED_ISNK3:
> > + sel_field = F_LED3_DUTY;
> > + break;
> > + default:
> > + sel_field = F_LED4_DUTY;
>
> Missed break;
>
> > + }
>
> ...
>
> > + switch (led_no) {
> > + case MT6370_LED_ISNK1:
> > + sel_field = F_LED1_FREQ;
> > + break;
> > + case MT6370_LED_ISNK2:
> > + sel_field = F_LED2_FREQ;
> > + break;
> > + case MT6370_LED_ISNK3:
> > + sel_field = F_LED3_FREQ;
> > + break;
> > + default:
> > + sel_field = F_LED4_FREQ;
>
> Ditto.
>
> > + }
>
> ...
>
> > + switch (led_no) {
> > + case MT6370_LED_ISNK1:
> > + case MT6370_LED_ISNK2:
> > + case MT6370_LED_ISNK3:
> > + *base = MT6370_REG_RGB1_TR + led_no * 3;
> > + break;
> > + default:
> > + *base = MT6370_REG_RGB_CHRIND_TR;
>
> Ditto.
> It seems you dropped them for all switch-cases. It's not goot, please
> restore them back.
>
> > + }
>
> ...
>
> > + u8 val[P_MAX_PATTERNS / 2] = {0};
>
> { } should suffice
>
>
In the above range selector, we use the 'logic or' to generate the
pattern values.
If to change it from '{0} to '{ }', is it correct?
> > + /*
> > + * Pattern list
> > + * tr1: byte 0, b'[7: 4]
> > + * tr2: byte 0, b'[3: 0]
> > + * tf1: byte 1, b'[7: 4]
> > + * tf2: byte 1, b'[3: 0]
> > + * ton: byte 2, b'[7: 4]
> > + * toff: byte 2, b'[3: 0]
> > + */
> > + for (i = 0; i < P_MAX_PATTERNS; i++) {
> > + curr = pattern + i;
> > +
> > + sel_range = i == P_LED_TOFF ? R_LED_TOFF : R_LED_TRFON;
> > +
> > + linear_range_get_selector_within(priv->ranges + sel_range,
> > + curr->delta_t, &sel);
> > +
> > + val[i / 2] |= sel << (4 * ((i + 1) % 2));
> > + }
> > +
> > + memcpy(pattern_val, val, 3);
> > + return 0;
> > +}
>
> ...
>
> > +out:
>
> out_unlock:
>
> > + mutex_unlock(&priv->lock);
> > +
> > + return ret;
>
> ...
>
> > +out:
>
> Ditto. And so on.
>
> > + mutex_unlock(&priv->lock);
> > +
> > + return ret;
>
> ...
>
> > + sub_led = devm_kzalloc(priv->dev,
> > + sizeof(*sub_led) * MC_CHANNEL_NUM,
> > + GFP_KERNEL);
>
> NIH devm_kcalloc(). Also check if you really need zeroed data.
>
Ok, and after the check, I also need to add one line to set the intensity to 0.
> > + if (!sub_led)
> > + return -ENOMEM;
>
> ...
>
> > + ret = fwnode_property_read_u32(child, "color", &color);
> > + if (ret) {
> > + dev_err(priv->dev,
> > + "led %d, no color specified\n",
> > + led->index);
> > + return ret;
>
> return dev_err_probe(...) ; ?
>
> Ditto for many places in your entire series.
>
> > + }
>
> ...
>
> > + priv = devm_kzalloc(&pdev->dev,
> > + struct_size(priv, leds, count), GFP_KERNEL);
>
> At least one parameter can be placed on the previous line.
>
> > + if (!priv)
> > + return -ENOMEM;
>
> --
> With Best Regards,
> Andy Shevchenko
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