+ linux-pm On Thu, Oct 19, 2017 at 07:10:07PM +0800, Jeffy Chen wrote: > Currently we are handling pcie wake irq in mrvl wifi driver. > Move it to rockchip pcie driver for Gru boards.
It might be worth documenting one of the reasons for this patch, which I'll comment on below: > Signed-off-by: Jeffy Chen <[email protected]> > --- > > Changes in v7: None > Changes in v6: None > Changes in v5: > Use "wakeup" instead of "wake" > > Changes in v3: None > Changes in v2: None > > arch/arm64/boot/dts/rockchip/rk3399-gru.dtsi | 15 +++++++++------ > 1 file changed, 9 insertions(+), 6 deletions(-) > > diff --git a/arch/arm64/boot/dts/rockchip/rk3399-gru.dtsi > b/arch/arm64/boot/dts/rockchip/rk3399-gru.dtsi > index 470105d651c2..04499714f541 100644 > --- a/arch/arm64/boot/dts/rockchip/rk3399-gru.dtsi > +++ b/arch/arm64/boot/dts/rockchip/rk3399-gru.dtsi > @@ -708,7 +708,15 @@ ap_i2c_audio: &i2c8 { > > ep-gpios = <&gpio2 27 GPIO_ACTIVE_HIGH>; > pinctrl-names = "default"; > - pinctrl-0 = <&pcie_clkreqn_cpm>, <&wifi_perst_l>; > + pinctrl-0 = <&pcie_clkreqn_cpm>, <&wlan_host_wake_l>, <&wifi_perst_l>; > + > + interrupts-extended = <&gic GIC_SPI 49 IRQ_TYPE_LEVEL_HIGH 0>, > + <&gic GIC_SPI 50 IRQ_TYPE_LEVEL_HIGH 0>, > + <&gic GIC_SPI 51 IRQ_TYPE_LEVEL_HIGH 0>, > + <&gpio0 8 IRQ_TYPE_LEVEL_LOW>; > + interrupt-names = "sys", "legacy", "client", "wakeup"; > + /delete-property/ interrupts; > + > vpcie3v3-supply = <&pp3300_wifi_bt>; > vpcie1v8-supply = <&wlan_pd_n>; /* HACK: see &wlan_pd_n */ > vpcie0v9-supply = <&pp900_pcie>; > @@ -723,11 +731,6 @@ ap_i2c_audio: &i2c8 { > compatible = "pci1b4b,2b42"; > reg = <0x83010000 0x0 0x00000000 0x0 0x00100000 > 0x83010000 0x0 0x00100000 0x0 0x00100000>; > - interrupt-parent = <&gpio0>; > - interrupts = <8 IRQ_TYPE_LEVEL_LOW>; One of the problems here is that this is a definition for a WAKE# interrupt, not for a legacy INTx interrupt. So this creates a conflict when both of these happen: (a) the PCI bus sets up this interrupt for use as INTx support (as a shared interrupt), instead of using the actual PCI controller interrupt and (b) the mwifiex driver requests this interrupt as a non-shared wake interrupt, and fails to get it (and so fails to probe). IOW, non-MSI interrupts are broken today on these devices. Jeffy's patch fixes that. If we want to support something like the existing binding, we should clarify/update Documentation/devicetree/bindings/net/wireless/marvell-8xxx.txt. Personally, I would just declare that binding invalid for the PCI version. (It might still be valid for SDIO.) Also, if for some reason we *do* want WAKE# handling to be supported on a per-device basis (part of the discussion on patch 1), we should look at extending the existing PCI interrupt bindings in a way that doesn't break legacy interrupts. Brian > - pinctrl-names = "default"; > - pinctrl-0 = <&wlan_host_wake_l>; > - wakeup-source; > }; > }; > }; > -- > 2.11.0 > >
