diff options
Diffstat (limited to 'meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0125-i2c-aspeed-clear-slave-addresses-in-probe.patch')
| -rw-r--r-- | meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0125-i2c-aspeed-clear-slave-addresses-in-probe.patch | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0125-i2c-aspeed-clear-slave-addresses-in-probe.patch b/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0125-i2c-aspeed-clear-slave-addresses-in-probe.patch new file mode 100644 index 000000000..cd5fe4deb --- /dev/null +++ b/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0125-i2c-aspeed-clear-slave-addresses-in-probe.patch @@ -0,0 +1,33 @@ +From 40af0a280cad30194c5ced83f6462c304d2f8c92 Mon Sep 17 00:00:00 2001 +From: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com> +Date: Wed, 16 Dec 2020 12:49:16 -0800 +Subject: [PATCH] i2c: aspeed: clear slave addresses in probe + +Initial value of I2CD18 is undefined according to the datasheet +so this commit adds the I2CD18 register clearing code into bus +initialization function to prevent any unexpected slave match +events. + +Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com> +Change-Id: I6c6cadeaf6fefcf74eba0d96c49986a810ccbb51 +--- + drivers/i2c/busses/i2c-aspeed.c | 3 +++ + 1 file changed, 3 insertions(+) + +diff --git a/drivers/i2c/busses/i2c-aspeed.c b/drivers/i2c/busses/i2c-aspeed.c +index d622ca14eb2a..d48489c803a8 100644 +--- a/drivers/i2c/busses/i2c-aspeed.c ++++ b/drivers/i2c/busses/i2c-aspeed.c +@@ -1610,6 +1610,9 @@ static int aspeed_i2c_probe_bus(struct platform_device *pdev) + writel(0, bus->base + ASPEED_I2C_INTR_CTRL_REG); + writel(0xffffffff, bus->base + ASPEED_I2C_INTR_STS_REG); + ++ /* Clear slave addresses. */ ++ writel(0, bus->base + ASPEED_I2C_DEV_ADDR_REG); ++ + parent_clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(parent_clk)) + return PTR_ERR(parent_clk); +-- +2.17.1 + |