Re: [PATCH] gpio: mxc: add power management support

Hi Anson, On Mon, Jul 16, 2018 at 3:14 AM, Anson Huang wrote: > OK, since i.MX7D has same GPIO type as i.MX35, to make it simple, I just added > a flag to indicate whether it supports save/restore, only i.MX7D enables In imx7s.dtsi the gpio nodes have: compatible = "fsl,imx7d-gpio",

Re: [PATCH] gpio: mxc: add power management support

Hi Anson, On Mon, Jul 16, 2018 at 3:14 AM, Anson Huang wrote: > OK, since i.MX7D has same GPIO type as i.MX35, to make it simple, I just added > a flag to indicate whether it supports save/restore, only i.MX7D enables In imx7s.dtsi the gpio nodes have: compatible = "fsl,imx7d-gpio",

RE: [PATCH] gpio: mxc: add power management support

Hi, Fabio Anson Huang Best Regards! > -Original Message- > From: Fabio Estevam [mailto:feste...@gmail.com] > Sent: Sunday, July 15, 2018 12:13 AM > To: Anson Huang > Cc: Linus Walleij ; open list:GPIO SUBSYSTEM > ; linux-kernel ; > dl-linux-imx > Subject: Re

RE: [PATCH] gpio: mxc: add power management support

Hi, Fabio Anson Huang Best Regards! > -Original Message- > From: Fabio Estevam [mailto:feste...@gmail.com] > Sent: Sunday, July 15, 2018 12:13 AM > To: Anson Huang > Cc: Linus Walleij ; open list:GPIO SUBSYSTEM > ; linux-kernel ; > dl-linux-imx > Subject: Re

Re: [PATCH] gpio: mxc: add power management support

Hi Anson, On Fri, Jul 13, 2018 at 10:53 PM, Anson Huang wrote: > Here are the details, i.MX7D LPSR mode and i.MX8QM/8QXP etc.' suspend/resume > may cause GPIO bank lose power, so need to save/restore, for other i.MX SoCs, > although no need to do save/restore, but doing it is NOT harmful, so do

Re: [PATCH] gpio: mxc: add power management support

Hi Anson, On Fri, Jul 13, 2018 at 10:53 PM, Anson Huang wrote: > Here are the details, i.MX7D LPSR mode and i.MX8QM/8QXP etc.' suspend/resume > may cause GPIO bank lose power, so need to save/restore, for other i.MX SoCs, > although no need to do save/restore, but doing it is NOT harmful, so do

RE: [PATCH] gpio: mxc: add power management support

Hi, Fabio Anson Huang Best Regards! > -Original Message- > From: Fabio Estevam [mailto:feste...@gmail.com] > Sent: Saturday, July 14, 2018 2:34 AM > To: Anson Huang > Cc: Linus Walleij ; open list:GPIO SUBSYSTEM > ; linux-kernel ; > dl-linux-imx > Subject: Re

RE: [PATCH] gpio: mxc: add power management support

Hi, Fabio Anson Huang Best Regards! > -Original Message- > From: Fabio Estevam [mailto:feste...@gmail.com] > Sent: Saturday, July 14, 2018 2:34 AM > To: Anson Huang > Cc: Linus Walleij ; open list:GPIO SUBSYSTEM > ; linux-kernel ; > dl-linux-imx > Subject: Re

Re: [PATCH] gpio: mxc: add power management support

Hi Anson, On Tue, Jul 10, 2018 at 4:48 AM, Anson Huang wrote: > GPIO registers could lose context on some i.MX SoCs, > like on i.MX7D, when enter LPSR mode, the whole SoC After further reviewing this patchI have a question: here you say that i.MX7D needs to save some registers. > will be

Re: [PATCH] gpio: mxc: add power management support

Hi Anson, On Tue, Jul 10, 2018 at 4:48 AM, Anson Huang wrote: > GPIO registers could lose context on some i.MX SoCs, > like on i.MX7D, when enter LPSR mode, the whole SoC After further reviewing this patchI have a question: here you say that i.MX7D needs to save some registers. > will be

Re: [PATCH] gpio: mxc: add power management support

On Fri, Jul 13, 2018 at 4:11 AM, Linus Walleij wrote: > On Tue, Jul 10, 2018 at 9:53 AM Anson Huang wrote: > >> GPIO registers could lose context on some i.MX SoCs, >> like on i.MX7D, when enter LPSR mode, the whole SoC >> will be powered off except LPSR domain, GPIO banks >> will lose context

Re: [PATCH] gpio: mxc: add power management support

On Fri, Jul 13, 2018 at 4:11 AM, Linus Walleij wrote: > On Tue, Jul 10, 2018 at 9:53 AM Anson Huang wrote: > >> GPIO registers could lose context on some i.MX SoCs, >> like on i.MX7D, when enter LPSR mode, the whole SoC >> will be powered off except LPSR domain, GPIO banks >> will lose context

Re: [PATCH] gpio: mxc: add power management support

2018-07-13 9:11 GMT+02:00 Linus Walleij : > On Tue, Jul 10, 2018 at 9:53 AM Anson Huang wrote: > >> GPIO registers could lose context on some i.MX SoCs, >> like on i.MX7D, when enter LPSR mode, the whole SoC >> will be powered off except LPSR domain, GPIO banks >> will lose context in this case,

Re: [PATCH] gpio: mxc: add power management support

2018-07-13 9:11 GMT+02:00 Linus Walleij : > On Tue, Jul 10, 2018 at 9:53 AM Anson Huang wrote: > >> GPIO registers could lose context on some i.MX SoCs, >> like on i.MX7D, when enter LPSR mode, the whole SoC >> will be powered off except LPSR domain, GPIO banks >> will lose context in this case,

Re: [PATCH] gpio: mxc: add power management support

On Tue, Jul 10, 2018 at 9:53 AM Anson Huang wrote: > GPIO registers could lose context on some i.MX SoCs, > like on i.MX7D, when enter LPSR mode, the whole SoC > will be powered off except LPSR domain, GPIO banks > will lose context in this case, need to restore > the context after resume from

Re: [PATCH] gpio: mxc: add power management support

On Tue, Jul 10, 2018 at 9:53 AM Anson Huang wrote: > GPIO registers could lose context on some i.MX SoCs, > like on i.MX7D, when enter LPSR mode, the whole SoC > will be powered off except LPSR domain, GPIO banks > will lose context in this case, need to restore > the context after resume from

[PATCH] gpio: mxc: add power management support

GPIO registers could lose context on some i.MX SoCs, like on i.MX7D, when enter LPSR mode, the whole SoC will be powered off except LPSR domain, GPIO banks will lose context in this case, need to restore the context after resume from LPSR mode. This patch adds GPIO save/restore for those

[PATCH] gpio: mxc: add power management support

GPIO registers could lose context on some i.MX SoCs, like on i.MX7D, when enter LPSR mode, the whole SoC will be powered off except LPSR domain, GPIO banks will lose context in this case, need to restore the context after resume from LPSR mode. This patch adds GPIO save/restore for those