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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org > Subject: Re: [PATCH V5 0/4] soc: imx: add i.MX BLK-CTL support > > On Fri, May 21, 2021 at 5:27 AM Peng Fan (OSS) > wrote: > > > > From: Peng Fan > > > > V5: > > Rework the blk-ctl driver to let sub-PGC use blk-ctl as parent power > > domain to fix the potential handshake issue. > > I still keep R-b/A-b tag for Patch 1,2,4, since very minor changes I > > only drop R-b tag for Patch 3, since it has big change. > > An example, the pgc_mipi not take pgc_dispmix as parent: > > > > pgc_dispmix: power-domain@10 { > > #power-domain-cells = <0>; > > reg = ; > > clocks = <&clk IMX8MM_CLK_DISP_ROOT>, > > <&clk IMX8MM_CLK_DISP_AXI_ROOT>, > > <&clk IMX8MM_CLK_DISP_APB_ROOT>; > > }; > > > > pgc_mipi: power-domain@11 { > > #power-domain-cells = <0>; > > reg = ; > > power-domains = <&dispmix_blk_ctl > > IMX8MM_BLK_CTL_PD_DISPMIX_BUS>; > > With this change, I get a bunch of errors on boot. The list of power-domains > appear correct on the surface, but it also has trouble waking from sleep. > > [ 0.695947] imx8mm-blk-ctl imx-dispmix-blk-ctl.0: invalid resource > [ 0.702849] imx8mm-blk-ctl: probe of imx-dispmix-blk-ctl.0 failed > with error -22 > [ 0.711259] imx8mm-blk-ctl imx-dispmix-blk-ctl.1: invalid resource > [ 0.716451] imx8mm-blk-ctl: probe of imx-dispmix-blk-ctl.1 failed > with error -22 > [ 0.724856] imx8mm-blk-ctl imx-dispmix-blk-ctl.2: invalid resource > [ 0.730097] imx8mm-blk-ctl: probe of imx-dispmix-blk-ctl.2 failed > with error -22 > [ 0.738398] imx8mm-blk-ctl imx-dispmix-blk-ctl.3: invalid resource > [ 0.743747] imx8mm-blk-ctl: probe of imx-dispmix-blk-ctl.3 failed > with error -22 It is just the imx8mm-blk-ctl driver matches with the new created child device, because the child device points the of_node of the parent device. But this error will not affect functionality. I'll resolve this issue and send out v6. > > If I have a wrong device tree configuration, can you please post an updated > device tree? I don't think an official patch for original pgc's were pushed as > part of either series. I used this e-mail as the patch to enable the blk-ctl. Do you have an device tree, I could give a look. Regards, Peng. > > thanks, > > adam > > > }; > > > > dispmix_blk_ctl: clock-controller@32e28000 { > > compatible = "fsl,imx8mm-dispmix-blk-ctl", "syscon"; > > reg = <0x32e28000 0x100>; > > #power-domain-cells = <1>; > > power-domains = <&pgc_dispmix>, <&pgc_mipi>; > > power-domain-names = "dispmix", "mipi"; > > clocks = <&clk IMX8MM_CLK_DISP_ROOT>, <&clk > IMX8MM_CLK_DISP_AXI_ROOT>, > > <&clk IMX8MM_CLK_DISP_APB_ROOT>; > > }; > > > > V4: > > Add R-b tag > > Typo fix > > Update the power domain macro names Per Abel and Frieder > > > > V3: > > Add explaination for not listing items in patch 2 commit log Per Rob. > > Addressed comments from Lucas and Frieder on patch [3,4]. > > A few comments from Jacky was ignored, because following gpcv2 > > coding style. > > > > V2: > > Fix yaml check failure. > > > > Previously there is an effort from Abel that take BLK-CTL as clock > > provider, but it turns out that there is A/B lock issue and we are not > > able resolve that. > > > > Per discuss with Lucas and Jacky, we made an agreement that take > > BLK-CTL as a power domain provider and use GPC's domain as parent, the > > consumer node take BLK-CTL as power domain input. > > > > This patchset has been tested on i.MX8MM EVK board, but one hack is > > not included in the patchset is that the DISPMIX BLK-CTL > > MIPI_M/S_RESET not implemented. Per Lucas, we will finally have a MIPI > > DPHY driver, so fine to leave it. > > > > Thanks for Lucas's suggestion, Frieder Schrempf for collecting all the > > patches, Abel's previous BLK-CTL work, Jacky Bai on help debug issues. > > > > > > Peng Fan (4): > > dt-bindings: power: Add defines for i.MX8MM BLK-CTL power domains > > Documentation: bindings: clk: Add bindings for i.MX BLK_CTL > > soc: imx: Add generic blk-ctl driver > > soc: imx: Add blk-ctl driver for i.MX8MM > > > > .../bindings/soc/imx/fsl,imx-blk-ctl.yaml | 66 ++++ > > drivers/soc/imx/Makefile | 2 +- > > drivers/soc/imx/blk-ctl-imx8mm.c | 139 ++++++++ > > drivers/soc/imx/blk-ctl.c | 311 > ++++++++++++++++++ > > drivers/soc/imx/blk-ctl.h | 85 +++++ > > include/dt-bindings/power/imx8mm-power.h | 13 + > > 6 files changed, 615 insertions(+), 1 deletion(-) create mode 100644 > > Documentation/devicetree/bindings/soc/imx/fsl,imx-blk-ctl.yaml > > create mode 100644 drivers/soc/imx/blk-ctl-imx8mm.c create mode > > 100644 drivers/soc/imx/blk-ctl.c create mode 100644 > > drivers/soc/imx/blk-ctl.h > > > > -- > > 2.30.0 > > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel