bcm27xx: remove linux 5.10 compatibility

[openwrt/staging/chunkeey.git] / target / linux / bcm27xx / patches-5.10 / 950-0382-drm-panel-raspberrypi-touchscreen-Use-independent-I2.patch

diff --git a/target/linux/bcm27xx/patches-5.10/950-0382-drm-panel-raspberrypi-touchscreen-Use-independent-I2.patch b/target/linux/bcm27xx/patches-5.10/950-0382-drm-panel-raspberrypi-touchscreen-Use-independent-I2.patch
deleted file mode 100644 (file)
index 57aabc7..0000000
--- a/target/linux/bcm27xx/patches-5.10/950-0382-drm-panel-raspberrypi-touchscreen-Use-independent-I2.patch
+++ /dev/null
@@ -1,58 +0,0 @@
-From 3ad3a680ece56c7134d9500a0413b4f9259c07d8 Mon Sep 17 00:00:00 2001
-From: Dave Stevenson <dave.stevenson@raspberrypi.com>
-Date: Thu, 23 Apr 2020 10:17:18 +0100
-Subject: [PATCH] drm/panel/raspberrypi-touchscreen: Use independent
- I2C actions with delay.
-
-We now have the hardware I2C controller pinmuxed to the drive the
-display I2C, but this controller does not support clock stretching.
-The Atmel micro-controller in the panel requires clock stretching
-to allow it to prepare any data to be read.
-
-Split the rpi_touchscreen_i2c_read into two independent transactions with
-a delay between them for the Atmel to prepare the data.
-
-Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
----
- .../drm/panel/panel-raspberrypi-touchscreen.c | 30 ++++++++++++++++++-
- 1 file changed, 29 insertions(+), 1 deletion(-)
-
---- a/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
-+++ b/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
-@@ -219,7 +219,35 @@ static struct rpi_touchscreen *panel_to_
- 
- static int rpi_touchscreen_i2c_read(struct rpi_touchscreen *ts, u8 reg)
- {
--      return i2c_smbus_read_byte_data(ts->i2c, reg);
-+      struct i2c_client *client = ts->i2c;
-+      struct i2c_msg msgs[1];
-+      u8 addr_buf[1] = { reg };
-+      u8 data_buf[1] = { 0, };
-+      int ret;
-+
-+      /* Write register address */
-+      msgs[0].addr = client->addr;
-+      msgs[0].flags = 0;
-+      msgs[0].len = ARRAY_SIZE(addr_buf);
-+      msgs[0].buf = addr_buf;
-+
-+      ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
-+      if (ret != ARRAY_SIZE(msgs))
-+              return -EIO;
-+
-+      usleep_range(100, 300);
-+
-+      /* Read data from register */
-+      msgs[0].addr = client->addr;
-+      msgs[0].flags = I2C_M_RD;
-+      msgs[0].len = 1;
-+      msgs[0].buf = data_buf;
-+
-+      ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
-+      if (ret != ARRAY_SIZE(msgs))
-+              return -EIO;
-+
-+      return data_buf[0];
- }
- 
- static void rpi_touchscreen_i2c_write(struct rpi_touchscreen *ts,