This is a note to let you know that I've just added the patch titled clk: clk-gpio: propagate rate change to parent to the 4.19-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: clk-clk-gpio-propagate-rate-change-to-parent.patch and it can be found in the queue-4.19 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit bf01d5dec2e3a0c301529e2257b8b10b712eb0ad Author: Michael Hennerich <michael.hennerich@xxxxxxxxxx> Date: Fri Nov 8 09:17:18 2019 +0200 clk: clk-gpio: propagate rate change to parent [ Upstream commit fc59462c5ce60da119568fac325c92fc6b7c6175 ] For an external clock source, which is gated via a GPIO, the rate change should typically be propagated to the parent clock. The situation where we are requiring this propagation, is when an external clock is connected to override an internal clock (which typically has a fixed rate). The external clock can have a different rate than the internal one, and may also be variable, thus requiring the rate propagation. This rate change wasn't propagated until now, and it's unclear about cases where this shouldn't be propagated. Thus, it's unclear whether this is fixing a bug, or extending the current driver behavior. Also, it's unsure about whether this may break any existing setups; in the case that it does, a device-tree property may be added to disable this flag. Signed-off-by: Michael Hennerich <michael.hennerich@xxxxxxxxxx> Signed-off-by: Alexandru Ardelean <alexandru.ardelean@xxxxxxxxxx> Link: https://lkml.kernel.org/r/20191108071718.17985-1-alexandru.ardelean@xxxxxxxxxx Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/clk/clk-gpio.c b/drivers/clk/clk-gpio.c index 40af4fbab4d2..af9cc00d2d92 100644 --- a/drivers/clk/clk-gpio.c +++ b/drivers/clk/clk-gpio.c @@ -248,7 +248,7 @@ static int gpio_clk_driver_probe(struct platform_device *pdev) else clk = clk_register_gpio_gate(&pdev->dev, node->name, parent_names ? parent_names[0] : NULL, gpiod, - 0); + CLK_SET_RATE_PARENT); if (IS_ERR(clk)) return PTR_ERR(clk);