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Tue, 12 May 2026 02:28:26 -0700 (PDT) Received: from MAHADEV.localdomain ([103.135.229.217]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-c826767bf53sm11351245a12.6.2026.05.12.02.28.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 May 2026 02:28:25 -0700 (PDT) From: Harshit Shaw To: deller@gmx.de Cc: gregkh@linuxfoundation.org, chintanlike@gmail.com, tzimmermann@suse.de, andriy.shevchenko@intel.com, linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org, Harshit Shaw Subject: [PATCH] staging: fbtft: convert sysfs attributes to use attribute_group Date: Tue, 12 May 2026 09:28:17 +0000 Message-ID: <20260512092817.1941-1-shawharshit116@gmail.com> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Replace direct device_create_file() and device_remove_file() calls with the correct attribute_group API using sysfs_create_group() and sysfs_remove_group(). This is the proper way to register sysfs attributes in kernel drivers. Signed-off-by: Harshit Shaw --- drivers/staging/fbtft/fbtft-sysfs.c | 83 ++++++++++++++++++----------- 1 file changed, 52 insertions(+), 31 deletions(-) diff --git a/drivers/staging/fbtft/fbtft-sysfs.c b/drivers/staging/fbtft/fbtft-sysfs.c index d05599d80011..8d3c4e49b68e 100644 --- a/drivers/staging/fbtft/fbtft-sysfs.c +++ b/drivers/staging/fbtft/fbtft-sysfs.c @@ -142,9 +142,30 @@ static ssize_t show_gamma_curve(struct device *device, return sprintf_gamma(par, par->gamma.curves, buf); } -static struct device_attribute gamma_device_attrs[] = { - __ATTR(gamma, 0660, show_gamma_curve, store_gamma_curve), -}; +static ssize_t store_debug(struct device *device, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct fb_info *fb_info = dev_get_drvdata(device); + struct fbtft_par *par = fb_info->par; + int ret; + + ret = kstrtoul(buf, 10, &par->debug); + if (ret) + return ret; + fbtft_expand_debug_value(&par->debug); + + return count; +} + +static ssize_t show_debug(struct device *device, + struct device_attribute *attr, char *buf) +{ + struct fb_info *fb_info = dev_get_drvdata(device); + struct fbtft_par *par = fb_info->par; + + return sysfs_emit(buf, "%lu\n", par->debug); +} void fbtft_expand_debug_value(unsigned long *debug) { @@ -173,45 +194,45 @@ void fbtft_expand_debug_value(unsigned long *debug) } } -static ssize_t store_debug(struct device *device, - struct device_attribute *attr, - const char *buf, size_t count) -{ - struct fb_info *fb_info = dev_get_drvdata(device); - struct fbtft_par *par = fb_info->par; - int ret; - - ret = kstrtoul(buf, 10, &par->debug); - if (ret) - return ret; - fbtft_expand_debug_value(&par->debug); +static DEVICE_ATTR(gamma, 0644, show_gamma_curve, store_gamma_curve); +static DEVICE_ATTR(debug, 0644, show_debug, store_debug); - return count; -} +static struct attribute *fbtft_attrs[] = { + &dev_attr_debug.attr, + NULL, +}; -static ssize_t show_debug(struct device *device, - struct device_attribute *attr, char *buf) -{ - struct fb_info *fb_info = dev_get_drvdata(device); - struct fbtft_par *par = fb_info->par; +static struct attribute *fbtft_gamma_attrs[] = { + &dev_attr_gamma.attr, + NULL, +}; - return sysfs_emit(buf, "%lu\n", par->debug); -} +static const struct attribute_group fbtft_attr_group = { + .attrs = fbtft_attrs, +}; -static struct device_attribute debug_device_attr = - __ATTR(debug, 0660, show_debug, store_debug); +static const struct attribute_group fbtft_gamma_attr_group = { + .attrs = fbtft_gamma_attrs, +}; void fbtft_sysfs_init(struct fbtft_par *par) { struct device *dev; + int ret; dev = dev_of_fbinfo(par->info); if (!dev) return; - device_create_file(dev, &debug_device_attr); - if (par->gamma.curves && par->fbtftops.set_gamma) - device_create_file(dev, &gamma_device_attrs[0]); + ret = sysfs_create_group(&dev->kobj, &fbtft_attr_group); + if (ret) + dev_warn(dev, "failed to create debug sysfs entry\n"); + + if (par->gamma.curves && par->fbtftops.set_gamma) { + ret = sysfs_create_group(&dev->kobj, &fbtft_gamma_attr_group); + if (ret) + dev_warn(dev, "failed to create gamma sysfs entry\n"); + } } void fbtft_sysfs_exit(struct fbtft_par *par) @@ -222,7 +243,7 @@ void fbtft_sysfs_exit(struct fbtft_par *par) if (!dev) return; - device_remove_file(dev, &debug_device_attr); + sysfs_remove_group(&dev->kobj, &fbtft_attr_group); if (par->gamma.curves && par->fbtftops.set_gamma) - device_remove_file(dev, &gamma_device_attrs[0]); + sysfs_remove_group(&dev->kobj, &fbtft_gamma_attr_group); } -- 2.53.0