brcm2708: rename target to bcm27xx

[openwrt/openwrt.git] / target / linux / brcm2708 / patches-4.19 / 950-0610-i2c-bcm2835-Set-clock-stretch-timeout-to-35ms.patch

diff --git a/target/linux/brcm2708/patches-4.19/950-0610-i2c-bcm2835-Set-clock-stretch-timeout-to-35ms.patch b/target/linux/brcm2708/patches-4.19/950-0610-i2c-bcm2835-Set-clock-stretch-timeout-to-35ms.patch
deleted file mode 100644 (file)
index 280cddf..0000000
--- a/target/linux/brcm2708/patches-4.19/950-0610-i2c-bcm2835-Set-clock-stretch-timeout-to-35ms.patch
+++ /dev/null
@@ -1,47 +0,0 @@
-From 8d453e2193951057db696e37b9c10e7e35c18cb0 Mon Sep 17 00:00:00 2001
-From: Phil Elwell <phil@raspberrypi.org>
-Date: Fri, 12 Jul 2019 15:38:35 +0100
-Subject: [PATCH] i2c: bcm2835: Set clock-stretch timeout to 35ms
-
-The BCM2835 I2C blocks have a register to set the clock-stretch
-timeout - how long the device is allowed to hold SCL low - in bus
-cycles. The current driver doesn't write to the register, therefore
-the default value of 64 cycles is being used for all devices.
-
-Set the timeout to the value recommended for SMBus - 35ms.
-
-See: https://github.com/raspberrypi/linux/issues/3064
-
-Signed-off-by: Phil Elwell <phil@raspberrypi.org>
----
- drivers/i2c/busses/i2c-bcm2835.c | 12 ++++++++++++
- 1 file changed, 12 insertions(+)
-
---- a/drivers/i2c/busses/i2c-bcm2835.c
-+++ b/drivers/i2c/busses/i2c-bcm2835.c
-@@ -194,6 +194,7 @@ static int clk_bcm2835_i2c_set_rate(stru
- {
-       struct clk_bcm2835_i2c *div = to_clk_bcm2835_i2c(hw);
-       u32 redl, fedl;
-+      u32 clk_tout;
-       u32 divider = clk_bcm2835_i2c_calc_divider(rate, parent_rate);
- 
-       if (divider == -EINVAL)
-@@ -217,6 +218,17 @@ static int clk_bcm2835_i2c_set_rate(stru
-       bcm2835_i2c_writel(div->i2c_dev, BCM2835_I2C_DEL,
-                          (fedl << BCM2835_I2C_FEDL_SHIFT) |
-                          (redl << BCM2835_I2C_REDL_SHIFT));
-+
-+      /*
-+       * Set the clock stretch timeout to the SMBUs-recommended 35ms.
-+       */
-+      if (rate > 0xffff*1000/35)
-+          clk_tout = 0xffff;
-+      else
-+          clk_tout = 35*rate/1000;
-+
-+      bcm2835_i2c_writel(div->i2c_dev, BCM2835_I2C_CLKT, clk_tout);
-+
-       return 0;
- }
-