diff --git a/target/linux/realtek/patches-6.12/100-rtl9300-i2c-add-more-speeds.patch b/target/linux/realtek/patches-6.12/100-rtl9300-i2c-add-more-speeds.patch
new file mode 100644
index 0000000000..1879c8f5ee
--- /dev/null
+++ b/target/linux/realtek/patches-6.12/100-rtl9300-i2c-add-more-speeds.patch
@@ -0,0 +1,52 @@
+From linux-i2c  Fri Feb 27 11:11:34 2026
+From: Jan Kantert <jan-kernel () kantert ! net>
+Date: Fri, 27 Feb 2026 11:11:34 +0000
+To: linux-i2c
+Subject: [PATCH] i2c: rtl9300: add support for 50 kHz and 2.5 MHz bus speeds
+Message-Id: <20260227111134.2163701-1-jan-kernel () kantert ! net>
+X-MARC-Message: https://marc.info/?l=linux-i2c&m=177219358420283
+
+Some SFP modules on certain switches (for example the ONTi ONT-S508CL-8S and
+XikeStor SKS8300-8X) exhibit unreliable I2C communication at the currently
+supported speeds. Add support for 50 kHz and 2.5 MHz I2C bus modes on the
+RTL9300 to improve compatibility with these devices.
+
+Signed-off-by: Jan Kantert <jan-kernel@kantert.net>
+---
+ drivers/i2c/busses/i2c-rtl9300.c | 16 ++++++++++++++--
+ 1 file changed, 14 insertions(+), 2 deletions(-)
+
+--- a/drivers/i2c/busses/i2c-rtl9300.c
++++ b/drivers/i2c/busses/i2c-rtl9300.c
+@@ -11,10 +11,16 @@
+ #include <linux/unaligned.h>
+ 
+ enum rtl9300_bus_freq {
+-	RTL9300_I2C_STD_FREQ,
+-	RTL9300_I2C_FAST_FREQ,
++	RTL9300_I2C_STD_FREQ,			// 100kHz
++	RTL9300_I2C_FAST_FREQ,			// 400kHz
++	RTL9300_I2C_SUPER_FAST_FREQ,		// 2.5MHz
++	RTL9300_I2C_SLOW_FREQ,			// 50kHz
+ };
+ 
++#define RTL9300_I2C_MAX_SUPER_FAST_FREQ		2500000
++#define RTL9300_I2C_MAX_SLOW_FREQ		50000
++
++
+ struct rtl9300_i2c;
+ 
+ struct rtl9300_i2c_chan {
+@@ -434,6 +440,12 @@ static int rtl9300_i2c_probe(struct plat
+ 		case I2C_MAX_FAST_MODE_FREQ:
+ 			chan->bus_freq = RTL9300_I2C_FAST_FREQ;
+ 			break;
++		case RTL9300_I2C_MAX_SUPER_FAST_FREQ:
++			chan->bus_freq = RTL9300_I2C_SUPER_FAST_FREQ;
++			break;
++		case RTL9300_I2C_MAX_SLOW_FREQ:
++			chan->bus_freq = RTL9300_I2C_SLOW_FREQ;
++			break;
+ 		default:
+ 			dev_warn(i2c->dev, "SDA%d clock-frequency %d not supported using default\n",
+ 				 sda_num, clock_freq);