From: peng.fan@nxp.com To: shawnguo@kernel.org, s.hauer@pengutronix.de, leonard.crestez@nxp.com, abel.vesa@nxp.com, aisheng.dong@nxp.com Cc: kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, Anson.Huang@nxp.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, Peng Fan <peng.fan@nxp.com> Subject: [PATCH V3 00/10] clk: imx: fixes and improve for i.MX8M Date: Thu, 7 May 2020 13:56:09 +0800 [thread overview] Message-ID: <1588830979-11586-1-git-send-email-peng.fan@nxp.com> (raw) From: Peng Fan <peng.fan@nxp.com> Patches rebased on for-next V3: Add R-b tag for patch 1-6,10 Use clk_mux_ops in patch 7, explain more details in commit log Boot test on i.MX8MM/N/MQ/P V2: Patch 7, drop wait after write, add one line comment for write twice V1: Patch 1,2 is to fix the lockdep warning reported by Leonard Patch 3 is to fix pll mux bit Patch 4 is align with other i.MX8M using gate Patch 5 is to simplify i.MX8MP clk root using composite Patch 3~5 is actually https://patchwork.kernel.org/patch/11402761/ with a minimal change to patch 5 here. Patch 6 is to use composite core clk for A53 clk root Patch 7,8,9 is actually to fix CORE/BUS clk slice issue. This issue is triggerred after we update U-Boot to include the A53 clk fixes to sources from PLL, not from A53 root clk, because of the signoff timing is 1GHz. U-Boot set the A53 root mux to 2, sys pll2 500MHz. Kernel will set the A53 root mux to 4, sys pll1 800MHz, then gate off sys pll2 500MHz. Then kernel will gate off A53 root because clk_ignore_unsed, A53 directly sources PLL, so it is ok to gate off A53 root. However when gate off A53 root clk, system hang, because the original mux sys pll2 500MHz gated off with CLK_OPS_PARENT_ENABLE flag. It is lucky that we not met issue for other core/bus clk slice except A53 ROOT core slice. But it is always triggerred after U-Boot and Linux both switch to use ARM PLL for A53 core, but have different mux settings for A53 root clk slice. So the three patches is to address this issue. Patch 10 is make memrepair as critical. Peng Fan (10): arm64: dts: imx8m: assign clocks for A53 clk: imx8m: drop clk_hw_set_parent for A53 clk: imx: imx8mp: fix pll mux bit clk: imx8mp: Define gates for pll1/2 fixed dividers clk: imx8mp: use imx8m_clk_hw_composite_core to simplify code clk: imx8m: migrate A53 clk root to use composite core clk: imx: add mux ops for i.MX8M composite clk clk: imx: add imx8m_clk_hw_composite_bus clk: imx: use imx8m_clk_hw_composite_bus for i.MX8M bus clk slice clk: imx8mp: mark memrepair clock as critical arch/arm64/boot/dts/freescale/imx8mm.dtsi | 10 +- arch/arm64/boot/dts/freescale/imx8mn.dtsi | 10 +- arch/arm64/boot/dts/freescale/imx8mp.dtsi | 11 ++- arch/arm64/boot/dts/freescale/imx8mq.dtsi | 9 +- drivers/clk/imx/clk-composite-8m.c | 56 ++++++++++- drivers/clk/imx/clk-imx8mm.c | 27 +++--- drivers/clk/imx/clk-imx8mn.c | 25 +++-- drivers/clk/imx/clk-imx8mp.c | 150 +++++++++++++++--------------- drivers/clk/imx/clk-imx8mq.c | 29 +++--- drivers/clk/imx/clk.h | 7 ++ include/dt-bindings/clock/imx8mp-clock.h | 28 +++++- 11 files changed, 229 insertions(+), 133 deletions(-) -- 2.16.4
WARNING: multiple messages have this Message-ID (diff)
From: peng.fan@nxp.com To: shawnguo@kernel.org, s.hauer@pengutronix.de, leonard.crestez@nxp.com, abel.vesa@nxp.com, aisheng.dong@nxp.com Cc: devicetree@vger.kernel.org, Peng Fan <peng.fan@nxp.com>, Anson.Huang@nxp.com, linux-kernel@vger.kernel.org, linux-imx@nxp.com, kernel@pengutronix.de, festevam@gmail.com, linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH V3 00/10] clk: imx: fixes and improve for i.MX8M Date: Thu, 7 May 2020 13:56:09 +0800 [thread overview] Message-ID: <1588830979-11586-1-git-send-email-peng.fan@nxp.com> (raw) From: Peng Fan <peng.fan@nxp.com> Patches rebased on for-next V3: Add R-b tag for patch 1-6,10 Use clk_mux_ops in patch 7, explain more details in commit log Boot test on i.MX8MM/N/MQ/P V2: Patch 7, drop wait after write, add one line comment for write twice V1: Patch 1,2 is to fix the lockdep warning reported by Leonard Patch 3 is to fix pll mux bit Patch 4 is align with other i.MX8M using gate Patch 5 is to simplify i.MX8MP clk root using composite Patch 3~5 is actually https://patchwork.kernel.org/patch/11402761/ with a minimal change to patch 5 here. Patch 6 is to use composite core clk for A53 clk root Patch 7,8,9 is actually to fix CORE/BUS clk slice issue. This issue is triggerred after we update U-Boot to include the A53 clk fixes to sources from PLL, not from A53 root clk, because of the signoff timing is 1GHz. U-Boot set the A53 root mux to 2, sys pll2 500MHz. Kernel will set the A53 root mux to 4, sys pll1 800MHz, then gate off sys pll2 500MHz. Then kernel will gate off A53 root because clk_ignore_unsed, A53 directly sources PLL, so it is ok to gate off A53 root. However when gate off A53 root clk, system hang, because the original mux sys pll2 500MHz gated off with CLK_OPS_PARENT_ENABLE flag. It is lucky that we not met issue for other core/bus clk slice except A53 ROOT core slice. But it is always triggerred after U-Boot and Linux both switch to use ARM PLL for A53 core, but have different mux settings for A53 root clk slice. So the three patches is to address this issue. Patch 10 is make memrepair as critical. Peng Fan (10): arm64: dts: imx8m: assign clocks for A53 clk: imx8m: drop clk_hw_set_parent for A53 clk: imx: imx8mp: fix pll mux bit clk: imx8mp: Define gates for pll1/2 fixed dividers clk: imx8mp: use imx8m_clk_hw_composite_core to simplify code clk: imx8m: migrate A53 clk root to use composite core clk: imx: add mux ops for i.MX8M composite clk clk: imx: add imx8m_clk_hw_composite_bus clk: imx: use imx8m_clk_hw_composite_bus for i.MX8M bus clk slice clk: imx8mp: mark memrepair clock as critical arch/arm64/boot/dts/freescale/imx8mm.dtsi | 10 +- arch/arm64/boot/dts/freescale/imx8mn.dtsi | 10 +- arch/arm64/boot/dts/freescale/imx8mp.dtsi | 11 ++- arch/arm64/boot/dts/freescale/imx8mq.dtsi | 9 +- drivers/clk/imx/clk-composite-8m.c | 56 ++++++++++- drivers/clk/imx/clk-imx8mm.c | 27 +++--- drivers/clk/imx/clk-imx8mn.c | 25 +++-- drivers/clk/imx/clk-imx8mp.c | 150 +++++++++++++++--------------- drivers/clk/imx/clk-imx8mq.c | 29 +++--- drivers/clk/imx/clk.h | 7 ++ include/dt-bindings/clock/imx8mp-clock.h | 28 +++++- 11 files changed, 229 insertions(+), 133 deletions(-) -- 2.16.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2020-05-07 6:05 UTC|newest] Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-05-07 5:56 peng.fan [this message] 2020-05-07 5:56 ` [PATCH V3 00/10] clk: imx: fixes and improve for i.MX8M peng.fan 2020-05-07 5:56 ` [PATCH V3 01/10] arm64: dts: imx8m: assign clocks for A53 peng.fan 2020-05-07 5:56 ` peng.fan 2020-05-07 5:56 ` [PATCH V3 02/10] clk: imx8m: drop clk_hw_set_parent " peng.fan 2020-05-07 5:56 ` peng.fan 2020-05-07 5:56 ` [PATCH V3 03/10] clk: imx: imx8mp: fix pll mux bit peng.fan 2020-05-07 5:56 ` peng.fan 2020-05-07 5:56 ` [PATCH V3 04/10] clk: imx8mp: Define gates for pll1/2 fixed dividers peng.fan 2020-05-07 5:56 ` peng.fan 2020-05-07 5:56 ` [PATCH V3 05/10] clk: imx8mp: use imx8m_clk_hw_composite_core to simplify code peng.fan 2020-05-07 5:56 ` peng.fan 2020-05-07 5:56 ` [PATCH V3 06/10] clk: imx8m: migrate A53 clk root to use composite core peng.fan 2020-05-07 5:56 ` peng.fan 2020-05-07 5:56 ` [PATCH V3 07/10] clk: imx: add mux ops for i.MX8M composite clk peng.fan 2020-05-07 5:56 ` peng.fan 2020-05-07 5:56 ` [PATCH V3 08/10] clk: imx: add imx8m_clk_hw_composite_bus peng.fan 2020-05-07 5:56 ` peng.fan 2020-05-07 5:56 ` [PATCH V3 09/10] clk: imx: use imx8m_clk_hw_composite_bus for i.MX8M bus clk slice peng.fan 2020-05-07 5:56 ` peng.fan 2020-05-07 5:56 ` [PATCH V3 10/10] clk: imx8mp: mark memrepair clock as critical peng.fan 2020-05-07 5:56 ` peng.fan 2020-05-07 6:59 ` Aisheng Dong 2020-05-07 6:59 ` Aisheng Dong 2020-05-07 7:59 ` Peng Fan 2020-05-07 7:59 ` Peng Fan 2020-05-07 6:58 ` [PATCH V3 00/10] clk: imx: fixes and improve for i.MX8M Aisheng Dong 2020-05-07 6:58 ` Aisheng Dong 2020-05-20 1:27 ` Shawn Guo 2020-05-20 1:27 ` Shawn Guo
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