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path: root/drivers/clk/imx/clk-imx25.c
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2021-04-04clk: imx: Fix reparenting of UARTs not associated with stdoutAdam Ford1-11/+1
Most if not all i.MX SoC's call a function which enables all UARTS. This is a problem for users who need to re-parent the clock source, because any attempt to change the parent results in an busy error due to the fact that the clocks have been enabled already. clk: failed to reparent uart1 to sys_pll1_80m: -16 Instead of pre-initializing all UARTS, scan the device tree to see which UART clocks are associated to stdout, and only enable those UART clocks if it's needed early. This will move initialization of the remaining clocks until after the parenting of the clocks. When the clocks are shutdown, this mechanism will also disable any clocks that were pre-initialized. Fixes: 9461f7b33d11c ("clk: fix CLK_SET_RATE_GATE with clock rate protection") Suggested-by: Aisheng Dong <aisheng.dong@nxp.com> Signed-off-by: Adam Ford <aford173@gmail.com> Reviewed-by: Abel Vesa <abel.vesa@nxp.com> Tested-by: Ahmad Fatoum <a.fatoum@pengutronix.de> Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
2019-05-21treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 1Thomas Gleixner1-14/+1
Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 51 franklin street fifth floor boston ma 02110 1301 usa this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option [no]_[pad]_[ctrl] any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 51 franklin street fifth floor boston ma 02110 1301 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 176 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Jilayne Lovejoy <opensource@jilayne.com> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190519154040.652910950@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-11-25clk: imx25: Remove osc clock from driverMarkus Pargmann1-16/+2
The 'osc' clock is already initialized by the fixed clock defined in imx25.dtsi. The imx25 clock driver tries to add this clock for a second time and fails with -EEXIST: i.MX clk 1: register failed with -17 As the clock is already properly setup in DT with a different driver, we can completely remove the handling in the imx25 clock driver. Signed-off-by: Markus Pargmann <mpa@pengutronix.de> Reviewed-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2015-09-26clk: imx25: retain early UART clocks during kernel initLucas Stach1-0/+12
Make sure to keep UART clocks enabled during kernel init if earlyprintk or earlycon are active. Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2015-06-03ARM: imx: move clock drivers into drivers/clkShawn Guo1-0/+262
After the cleanup on clock drivers, they are now ready to be moved into drivers/clk. Let's move them into drivers/clk/imx folder. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Acked-by: Stephen Boyd <sboyd@codeaurora.org>