linux-kernel - Re: [PATCH v7 2/5] ARM: rockchip: add suspend and resume for RK3288

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Date:	Mon, 10 Nov 2014 14:42:06 -0800
From:	Doug Anderson <dianders@...omium.org>
To:	Chris Zhong <zyw@...k-chips.com>
Cc:	Heiko Stübner <heiko@...ech.de>,
	Mike Turquette <mturquette@...aro.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Russell King <linux@....linux.org.uk>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Kevin Hilman <khilman@...nel.org>,
	"open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
	Tony Xie <xxx@...k-chips.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v7 2/5] ARM: rockchip: add suspend and resume for RK3288

Chris,

On Fri, Nov 7, 2014 at 5:49 AM, Chris Zhong <zyw@...k-chips.com> wrote:
> It's a basic version of suspend and resume for rockchip,
> it only support RK3288 now.
>
> Signed-off-by: Tony Xie <xxx@...k-chips.com>
> Signed-off-by: Chris Zhong <zyw@...k-chips.com>
> Tested-by: Doug Anderson <dianders@...omium.org>
> Reviewed-by: Doug Anderson <dianders@...omium.org>
>
> ---
>
> Changes in v7:
> - get rid all of unused code
>
> Changes in v6:
> - get rid of the save/restore of SRAM
> - doing the copy of resume code once at init time
> - remove ROCKCHIP_ARM_OFF_LOGIC_DEEP from rk3288_fill_in_bootram
> - add of_platform_populate in rockchip_dt_init
>
> Changes in v5:
> - use rk3288_bootram_sz for memcpy size
> - fixed error of sram save and restore
>
> Changes in v4:
> - remove grf regmap
>
> Changes in v3:
> - move the pinmux of gpio6_c6 save and restore to pinctrl-rockchip
>
> Changes in v2:
> - add the regulator calls in prepare and finish.
> - add the pinmux of gpio6_c6 save and restore
>
>  arch/arm/mach-rockchip/Makefile   |   1 +
>  arch/arm/mach-rockchip/pm.c       | 264 ++++++++++++++++++++++++++++++++++++++
>  arch/arm/mach-rockchip/pm.h       |  99 ++++++++++++++
>  arch/arm/mach-rockchip/rockchip.c |   2 +
>  arch/arm/mach-rockchip/sleep.S    |  73 +++++++++++
>  5 files changed, 439 insertions(+)

I haven't done a full re-review of this version, but...


> +static int rk3288_suspend_iomap(void)
> +{
> +       struct device_node *node;
> +       struct resource res;
> +
> +       node = of_find_compatible_node(NULL, NULL, "rockchip,rk3288-pmu-sram");
> +       if (!node) {
> +               pr_err("%s: could not find bootram dt node\n", __func__);
> +               return -1;
> +       }
> +
> +       rk3288_bootram_base = of_iomap(node, 0);
> +       if (!rk3288_bootram_base) {
> +               pr_err("%s: could not map bootram base\n", __func__);
> +               return -1;
> +       }
> +
> +       if (of_address_to_resource(node, 0, &res)) {
> +               pr_err("%s: could not get bootram phy addr\n", __func__);
> +               return -1;
> +       }
> +
> +       rk3288_bootram_phy = res.start;
> +
> +       /* copy resume code and data to bootsram */
> +       memcpy(rk3288_bootram_base, rockchip_slp_cpu_resume,
> +              rk3288_bootram_sz);
> +
> +       rk3288_config_bootdata();

Note that much of the above is no longer really part of the "iomap".
It should probably be moved out into "rk3288_suspend_init".
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