Messages in this thread Patch in this message | | | From | Fabio Estevam <> | Date | Thu, 7 Feb 2019 22:50:28 -0200 | Subject | Re: sdhci-esdhc-imx/v5.0-rc5: i.MX50 system hangs when "per" clock is disabled |
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Hi Jonathan,
On Thu, Feb 7, 2019 at 8:52 PM Jonathan Neuschäfer <j.neuschaefer@gmx.net> wrote: > > Hi, > > I'm currently porting mainline Linux to an i.MX507-based board > (preliminary DT here[1]). Recently I've enabled esdhc1 in the > devicetree. > > However, as soon as the mmc driver (sdhci-esdhc-imx.c) disables clk_per > in sdhci_esdhc_runtime_suspend[2], the whole system locks up in some way. > Booting with CONFIG_PM=n "fixes" the problem; commenting out the > offending line in sdhci_esdhc_runtime_suspend lets the system survive, > but leaves the MMC controller in an unusable state (of course it's not a > proper solution anyway). > > I tried to compare the CCM's clocks between i.MX50 and i.MX53, but > unfortunately, the i.MX50 reference manual doesn't have the table called > "Output clocks from CCM".
Please check Table 5-10. CCM_CCGR3 Gated Clock Mapping to Target Module from the MX50 Referene Manual.
> > Does anyone have any ideas or patches that I could try in order to > narrow the problem further down?
Does the change below help?
--- a/arch/arm/boot/dts/imx50.dtsi +++ b/arch/arm/boot/dts/imx50.dtsi @@ -102,7 +102,7 @@ reg = <0x50004000 0x4000>; interrupts = <1>; clocks = <&clks IMX5_CLK_ESDHC1_IPG_GATE>, - <&clks IMX5_CLK_DUMMY>, + <&clks IMX5_CLK_ESDHC1_IPG_GATE>, <&clks IMX5_CLK_ESDHC1_PER_GATE>; clock-names = "ipg", "ahb", "per"; bus-width = <4>; @@ -114,7 +114,7 @@ reg = <0x50008000 0x4000>; interrupts = <2>; clocks = <&clks IMX5_CLK_ESDHC2_IPG_GATE>, - <&clks IMX5_CLK_DUMMY>, + <&clks IMX5_CLK_ESDHC2_IPG_GATE>, <&clks IMX5_CLK_ESDHC2_PER_GATE>; clock-names = "ipg", "ahb", "per"; bus-width = <4>;
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