1 files changed, 54 insertions, 0 deletions
diff --git a/target/linux/ipq807x/patches-5.15/0048-v6.1-clk-qcom-reset-Allow-specifying-custom-reset-delay.patch b/target/linux/ipq807x/patches-5.15/0048-v6.1-clk-qcom-reset-Allow-specifying-custom-reset-delay.patch
new file mode 100644
index 0000000000..6a525f2c3e
--- /dev/null
+++ b/target/linux/ipq807x/patches-5.15/0048-v6.1-clk-qcom-reset-Allow-specifying-custom-reset-delay.patch
@@ -0,0 +1,54 @@
+From 72bc31aa621e21a7c36a7da8aa6f6a77bb234e0b Mon Sep 17 00:00:00 2001
+From: Stephan Gerhold <stephan.gerhold@kernkonzept.com>
+Date: Wed, 6 Jul 2022 15:41:29 +0200
+Subject: [PATCH] clk: qcom: reset: Allow specifying custom reset delay
+
+The amount of time required between asserting and deasserting the reset
+signal can vary depending on the involved hardware component. Sometimes
+1 us might not be enough and a larger delay is necessary to conform to
+the specifications.
+
+Usually this is worked around in the consuming drivers, by replacing
+reset_control_reset() with a sequence of reset_control_assert(), waiting
+for a custom delay, followed by reset_control_deassert().
+
+However, in some cases the driver making use of the reset is generic and
+can be used with different reset controllers. In this case the reset
+time requirement is better handled directly by the reset controller
+driver.
+
+Make this possible by adding an "udelay" field to the qcom_reset_map
+that allows setting a different reset delay (in microseconds).
+
+Signed-off-by: Stephan Gerhold <stephan.gerhold@kernkonzept.com>
+Signed-off-by: Bjorn Andersson <andersson@kernel.org>
+Link: https://lore.kernel.org/r/20220706134132.3623415-4-stephan.gerhold@kernkonzept.com
+---
+ drivers/clk/qcom/reset.c | 4 +++-
+ drivers/clk/qcom/reset.h | 1 +
+ 2 files changed, 4 insertions(+), 1 deletion(-)
+
+--- a/drivers/clk/qcom/reset.c
++++ b/drivers/clk/qcom/reset.c
+@@ -13,8 +13,10 @@
+ 
+ static int qcom_reset(struct reset_controller_dev *rcdev, unsigned long id)
+ {
++	struct qcom_reset_controller *rst = to_qcom_reset_controller(rcdev);
++
+ 	rcdev->ops->assert(rcdev, id);
+-	udelay(1);
++	udelay(rst->reset_map[id].udelay ?: 1); /* use 1 us as default */
+ 	rcdev->ops->deassert(rcdev, id);
+ 	return 0;
+ }
+--- a/drivers/clk/qcom/reset.h
++++ b/drivers/clk/qcom/reset.h
+@@ -11,6 +11,7 @@
+ struct qcom_reset_map {
+ 	unsigned int reg;
+ 	u8 bit;
++	u8 udelay;
+ };
+ 
+ struct regmap;