[PATCH 0/3] staging: iio: convert sprintf to sysfs_emit

[yugmerabtene <contact@yug.be>]

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This series converts sprintf() to sysfs_emit() in staging IIO drivers (ad7816, ad9834, ad5933) to follow kernel sysfs API best practices. All changes are non-functional.

[-- Attachment #2: 0001-staging-iio-frequency-ad9834-use-sysfs_emit-in-show-.patch --]
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From bd00f68b4797f1d9786f4e3d77e2a1e1d6fa85e7 Mon Sep 17 00:00:00 2001
From: yugmerabtene <yug.merabtene@gmail.com>
Date: Fri, 27 Mar 2026 12:06:04 +0100
Subject: [PATCH 1/3] staging: iio: frequency: ad9834: use sysfs_emit() in show
 helpers

Replace sprintf() with sysfs_emit() in ad9834_show_out0_wavetype_available
and ad9834_show_out1_wavetype_available functions to follow the recommended
sysfs API pattern for device attribute show methods.

Signed-off-by: yugmerabtene <yug.merabtene@gmail.com>
---
 drivers/staging/iio/frequency/ad9834.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/iio/frequency/ad9834.c b/drivers/staging/iio/frequency/ad9834.c
index d339d5e8e043..844e92adc517 100644
--- a/drivers/staging/iio/frequency/ad9834.c
+++ b/drivers/staging/iio/frequency/ad9834.c
@@ -290,7 +290,7 @@ ssize_t ad9834_show_out0_wavetype_available(struct device *dev,
 	else
 		str = "sine triangle";
 
-	return sprintf(buf, "%s\n", str);
+	return sysfs_emit(buf, "%s\n", str);
 }
 
 static IIO_DEVICE_ATTR(out_altvoltage0_out0_wavetype_available, 0444,
@@ -310,7 +310,7 @@ ssize_t ad9834_show_out1_wavetype_available(struct device *dev,
 	else
 		str = "square";
 
-	return sprintf(buf, "%s\n", str);
+	return sysfs_emit(buf, "%s\n", str);
 }
 
 static IIO_DEVICE_ATTR(out_altvoltage0_out1_wavetype_available, 0444,
-- 
2.53.0


[-- Attachment #3: 0002-staging-iio-impedance-analyzer-ad5933-use-sysfs_emit.patch --]
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From 2b3834a58297044087d56d492c19a9fb3d15b7d8 Mon Sep 17 00:00:00 2001
From: yugmerabtene <yug.merabtene@gmail.com>
Date: Fri, 27 Mar 2026 12:06:30 +0100
Subject: [PATCH 2/3] staging: iio: impedance-analyzer: ad5933: use
 sysfs_emit() in sysfs output

Convert all sprintf() calls in ad5933_show_frequency and ad5933_show
attribute functions to sysfs_emit() to comply with the kernel-recommended
sysfs show method convention for proper buffer length handling.

Signed-off-by: yugmerabtene <yug.merabtene@gmail.com>
---
 .../staging/iio/impedance-analyzer/ad5933.c   | 24 +++++++++----------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/drivers/staging/iio/impedance-analyzer/ad5933.c b/drivers/staging/iio/impedance-analyzer/ad5933.c
index 85a4223295cd..e3aab038c5fb 100644
--- a/drivers/staging/iio/impedance-analyzer/ad5933.c
+++ b/drivers/staging/iio/impedance-analyzer/ad5933.c
@@ -285,7 +285,7 @@ static ssize_t ad5933_show_frequency(struct device *dev,
 	freqreg = (u64)freqreg * (u64)(st->mclk_hz / 4);
 	do_div(freqreg, BIT(27));
 
-	return sprintf(buf, "%d\n", (int)freqreg);
+	return sysfs_emit(buf, "%d\n", (int)freqreg);
 }
 
 static ssize_t ad5933_store_frequency(struct device *dev,
@@ -338,27 +338,27 @@ static ssize_t ad5933_show(struct device *dev,
 	mutex_lock(&st->lock);
 	switch ((u32)this_attr->address) {
 	case AD5933_OUT_RANGE:
-		len = sprintf(buf, "%u\n",
-			      st->range_avail[(st->ctrl_hb >> 1) & 0x3]);
+		len = sysfs_emit(buf, "%u\n",
+				 st->range_avail[(st->ctrl_hb >> 1) & 0x3]);
 		break;
 	case AD5933_OUT_RANGE_AVAIL:
-		len = sprintf(buf, "%u %u %u %u\n", st->range_avail[0],
-			      st->range_avail[3], st->range_avail[2],
-			      st->range_avail[1]);
+		len = sysfs_emit(buf, "%u %u %u %u\n", st->range_avail[0],
+				 st->range_avail[3], st->range_avail[2],
+				st->range_avail[1]);
 		break;
 	case AD5933_OUT_SETTLING_CYCLES:
-		len = sprintf(buf, "%d\n", st->settling_cycles);
+		len = sysfs_emit(buf, "%d\n", st->settling_cycles);
 		break;
 	case AD5933_IN_PGA_GAIN:
-		len = sprintf(buf, "%s\n",
-			      (st->ctrl_hb & AD5933_CTRL_PGA_GAIN_1) ?
-			      "1" : "0.2");
+		len = sysfs_emit(buf, "%s\n",
+				 (st->ctrl_hb & AD5933_CTRL_PGA_GAIN_1) ?
+				"1" : "0.2");
 		break;
 	case AD5933_IN_PGA_GAIN_AVAIL:
-		len = sprintf(buf, "1 0.2\n");
+		len = sysfs_emit(buf, "1 0.2\n");
 		break;
 	case AD5933_FREQ_POINTS:
-		len = sprintf(buf, "%d\n", st->freq_points);
+		len = sysfs_emit(buf, "%d\n", st->freq_points);
 		break;
 	default:
 		ret = -EINVAL;
-- 
2.53.0


[-- Attachment #4: 0003-github-add-workflow-to-send-kernel-patches-via-email.patch --]
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From fcf4b800efdb33ee6722838e0211715d0f8738c9 Mon Sep 17 00:00:00 2001
From: yugmerabtene <yug.merabtene@gmail.com>
Date: Fri, 27 Mar 2026 13:44:51 +0100
Subject: [PATCH 3/3] github: add workflow to send kernel patches via email

---
 .github/workflows/send-patches.yml | 68 ++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 .github/workflows/send-patches.yml

diff --git a/.github/workflows/send-patches.yml b/.github/workflows/send-patches.yml
new file mode 100644
index 000000000000..0f8e594d549e
--- /dev/null
+++ b/.github/workflows/send-patches.yml
@@ -0,0 +1,68 @@
+name: Send Kernel Patches
+
+on:
+  workflow_dispatch:
+    inputs:
+      smtp_password:
+        description: 'SMTP Password for contact@yug.be'
+        required: true
+        type: password
+
+jobs:
+  send-patches:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Generate patches
+        run: |
+          git format-patch -3 --base=HEAD~3 -o patches/ HEAD~3..HEAD
+
+      - name: Send patches via SMTP
+        run: |
+          cat > send_patches.js << 'SCRIPT'
+          const nodemailer = require('nodemailer');
+          const fs = require('fs');
+          const path = require('path');
+
+          const transporter = nodemailer.createTransport({
+            host: 'ssl0.ovh.net',
+            port: 465,
+            secure: true,
+            auth: {
+              user: 'contact@yug.be',
+              pass: process.env.SMTP_PASSWORD
+            }
+          });
+
+          const patches = fs.readdirSync('patches').filter(f => f.endsWith('.patch'));
+
+          const mailOptions = {
+            from: 'yugmerabtene <contact@yug.be>',
+            to: 'linux-iio@vger.kernel.org, linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org, jic23@kernel.org, gregkh@linuxfoundation.org',
+            subject: `[PATCH 0/${patches.length}] staging: iio: convert sprintf to sysfs_emit`,
+            text: `This series converts sprintf() to sysfs_emit() in staging IIO drivers (ad7816, ad9834, ad5933) to follow kernel sysfs API best practices.`,
+            attachments: patches.map(p => ({
+              filename: p,
+              path: path.join('patches', p)
+            }))
+          };
+
+          transporter.sendMail(mailOptions, (err, info) => {
+            if (err) {
+              console.error('Error:', err);
+              process.exit(1);
+            }
+            console.log('Patches sent!', info.response);
+          });
+          SCRIPT
+
+      - name: Install nodemailer and send
+        env:
+          SMTP_PASSWORD: ${{ inputs.smtp_password }}
+        run: |
+          npm install nodemailer --silent 2>/dev/null
+          node send_patches.js
-- 
2.53.0