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[82.37.195.13]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-39c30226da7sm12857720f8f.98.2025.04.07.09.18.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Apr 2025 09:18:58 -0700 (PDT) Date: Mon, 7 Apr 2025 17:18:56 +0100 From: Daniel Thompson To: Pengyu Luo Cc: Jianhua Lu , Lee Jones , Daniel Thompson , Jingoo Han , Pavel Machek , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Helge Deller , dri-devel@lists.freedesktop.org, linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fbdev@vger.kernel.org Subject: Re: [PATCH 4/4] backlight: ktz8866: add definitions to make it more readable Message-ID: References: <20250407095119.588920-1-mitltlatltl@gmail.com> <20250407095119.588920-5-mitltlatltl@gmail.com> Precedence: bulk X-Mailing-List: linux-fbdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250407095119.588920-5-mitltlatltl@gmail.com> On Mon, Apr 07, 2025 at 05:51:19PM +0800, Pengyu Luo wrote: > LSB, MSB and their handling are slightly confused, so improve it. > > Signed-off-by: Pengyu Luo > --- > drivers/video/backlight/ktz8866.c | 8 ++++++-- > 1 file changed, 6 insertions(+), 2 deletions(-) > > diff --git a/drivers/video/backlight/ktz8866.c b/drivers/video/backlight/ktz8866.c > index b67ca136d..5364ecfc0 100644 > --- a/drivers/video/backlight/ktz8866.c > +++ b/drivers/video/backlight/ktz8866.c > @@ -24,7 +24,9 @@ > #define DEVICE_ID 0x01 > #define BL_CFG1 0x02 > #define BL_CFG2 0x03 > +/* least significant byte */ > #define BL_BRT_LSB 0x04 > +/* most significant byte */ I'm not convinced these comments are necessary. > #define BL_BRT_MSB 0x05 > #define BL_EN 0x08 > #define LCD_BIAS_CFG1 0x09 > @@ -47,6 +49,8 @@ > #define PWM_HYST 0x5 > > #define CURRENT_SINKS_MASK GENMASK(5, 0) > +#define LOWER_BYTE GENMASK(2, 0) I like using masks and FIELD_GET() but this is not a byte. These are the least significant bits. Daniel.