From: gregory.clement@free-electrons•com (Gregory CLEMENT)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH 06/17] gpio: mvebu: add suspend/resume support
Date: Mon, 03 Nov 2014 18:53:29 +0100 [thread overview]
Message-ID: <5457C119.90809@free-electrons.com> (raw)
In-Reply-To: <1414151970-6626-7-git-send-email-thomas.petazzoni@free-electrons.com>
On 24/10/2014 13:59, Thomas Petazzoni wrote:
> This commit adds the implementation of ->suspend() and ->resume()
> platform_driver hooks in order to save and restore the state of the
> GPIO configuration. In order to achieve that, additional fields are
> added to the mvebu_gpio_chip structure.
>
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons•com>
> Cc: Linus Walleij <linus.walleij@linaro•org>
> Cc: Alexandre Courbot <gnurou@gmail•com>
> Cc: linux-gpio at vger.kernel.org
> ---
> drivers/gpio/gpio-mvebu.c | 99 +++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 99 insertions(+)
>
> diff --git a/drivers/gpio/gpio-mvebu.c b/drivers/gpio/gpio-mvebu.c
> index 418e386..dd5545c 100644
> --- a/drivers/gpio/gpio-mvebu.c
> +++ b/drivers/gpio/gpio-mvebu.c
> @@ -83,6 +83,14 @@ struct mvebu_gpio_chip {
> int irqbase;
> struct irq_domain *domain;
> int soc_variant;
> +
> + /* Used to preserve GPIO registers accross suspend/resume */
across
> + u32 out_reg;
> + u32 io_conf_reg;
> + u32 blink_en_reg;
> + u32 in_pol_reg;
> + u32 edge_mask_regs[4];
> + u32 level_mask_regs[4];
> };
>
> /*
> @@ -554,6 +562,93 @@ static const struct of_device_id mvebu_gpio_of_match[] = {
> };
> MODULE_DEVICE_TABLE(of, mvebu_gpio_of_match);
>
> +static int mvebu_gpio_suspend(struct platform_device *pdev, pm_message_t state)
> +{
> + struct mvebu_gpio_chip *mvchip = platform_get_drvdata(pdev);
> + int i;
> +
> + mvchip->out_reg = readl(mvebu_gpioreg_out(mvchip));
> + mvchip->io_conf_reg = readl(mvebu_gpioreg_io_conf(mvchip));
> + mvchip->blink_en_reg = readl(mvebu_gpioreg_blink(mvchip));
> + mvchip->in_pol_reg = readl(mvebu_gpioreg_in_pol(mvchip));
> +
> + switch (mvchip->soc_variant) {
> + case MVEBU_GPIO_SOC_VARIANT_ORION:
> + mvchip->edge_mask_regs[0] =
> + readl(mvchip->membase + GPIO_EDGE_MASK_OFF);
> + mvchip->level_mask_regs[0] =
> + readl(mvchip->membase + GPIO_LEVEL_MASK_OFF);
> + break;
> + case MVEBU_GPIO_SOC_VARIANT_MV78200:
> + for (i = 0; i < 2; i++) {
> + mvchip->edge_mask_regs[i] =
> + readl(mvchip->membase +
> + GPIO_EDGE_MASK_MV78200_OFF(i));
> + mvchip->level_mask_regs[i] =
> + readl(mvchip->membase +
> + GPIO_LEVEL_MASK_MV78200_OFF(i));
> + }
> + break;
I don't know if the suspend is supported on this platform but as we were
on the road to remove this platform I don't know it it worth testing it unless
some interested users show up.
I didn't tested it on a mv782xx platform but the patch looks correct:
Reviewed-by: Gregory CLEMENT <gregory.clement@free-electrons•com>
Thanks,
Gregory
--
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
next prev parent reply other threads:[~2014-11-03 17:53 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-24 11:59 [PATCH 00/17] Suspend to RAM support for Armada XP Thomas Petazzoni
2014-10-24 11:59 ` [PATCH 01/17] Documentation: dt-bindings: minimal documentation for MVEBU SDRAM controller Thomas Petazzoni
2014-11-03 17:05 ` Gregory CLEMENT
2014-10-24 11:59 ` [PATCH 02/17] ARM: mvebu: enable strex backoff delay Thomas Petazzoni
2014-11-03 17:08 ` Gregory CLEMENT
2014-10-24 11:59 ` [PATCH 03/17] irqchip: irq-armada-370-xp: use proper return value for ->set_affinity() Thomas Petazzoni
2014-11-03 17:20 ` Gregory CLEMENT
2014-11-07 4:09 ` Jason Cooper
2014-10-24 11:59 ` [PATCH 04/17] irqchip: irq-armada-370-xp: suspend/resume support Thomas Petazzoni
2014-11-03 17:38 ` Gregory CLEMENT
2014-11-13 16:32 ` Thomas Petazzoni
2014-10-24 11:59 ` [PATCH 05/17] clocksource: time-armada-370-xp: add " Thomas Petazzoni
2014-11-03 17:45 ` Gregory CLEMENT
2014-10-24 11:59 ` [PATCH 06/17] gpio: mvebu: " Thomas Petazzoni
2014-10-24 16:30 ` David Cohen
2014-10-24 20:45 ` Andrew Lunn
2014-10-27 5:27 ` Alexandre Courbot
2014-10-27 17:45 ` David Cohen
2014-10-31 7:00 ` Linus Walleij
2014-10-31 7:52 ` Gregory CLEMENT
2014-10-31 8:14 ` Thomas Petazzoni
2014-11-03 13:26 ` Linus Walleij
2014-11-03 13:29 ` Linus Walleij
2014-11-03 17:53 ` Gregory CLEMENT [this message]
2014-11-03 21:21 ` Thomas Petazzoni
2014-10-24 11:59 ` [PATCH 07/17] bus: mvebu-mbus: " Thomas Petazzoni
2014-11-03 18:08 ` Gregory CLEMENT
2014-11-03 21:20 ` Thomas Petazzoni
2014-10-24 11:59 ` [PATCH 08/17] bus: mvebu-mbus: provide a mechanism to save SDRAM window configuration Thomas Petazzoni
2014-11-04 9:17 ` Gregory CLEMENT
2014-10-24 11:59 ` [PATCH 09/17] clk: mvebu: add suspend/resume for gatable clocks Thomas Petazzoni
2014-11-04 9:32 ` Gregory CLEMENT
2014-10-24 11:59 ` [PATCH 10/17] ARM: mvebu: implement suspend/resume support for Armada XP Thomas Petazzoni
2014-11-04 10:00 ` Gregory CLEMENT
2014-11-13 17:00 ` Thomas Petazzoni
2014-10-24 11:59 ` [PATCH 11/17] ARM: mvebu: reserve the first 10 KB of each memory bank for suspend/resume Thomas Petazzoni
2014-11-04 10:09 ` Gregory CLEMENT
2014-10-24 11:59 ` [PATCH 12/17] ARM: mvebu: Armada XP GP specific suspend/resume code Thomas Petazzoni
2014-10-24 14:20 ` Andrew Lunn
2014-10-24 14:28 ` Thomas Petazzoni
2014-10-24 14:51 ` Andrew Lunn
2014-10-27 12:51 ` Thomas Petazzoni
2014-10-27 14:19 ` Andrew Lunn
2014-10-27 14:40 ` Thomas Petazzoni
2014-10-27 14:59 ` Andrew Lunn
2014-10-27 15:12 ` Thomas Petazzoni
2014-10-27 15:15 ` Andrew Lunn
2014-11-10 13:53 ` Gregory CLEMENT
2014-10-24 11:59 ` [PATCH 13/17] ARM: mvebu: make sure MMU is disabled in armada_370_xp_cpu_resume Thomas Petazzoni
2014-11-10 14:05 ` Gregory CLEMENT
2014-10-24 11:59 ` [PATCH 14/17] ARM: mvebu: synchronize secondary CPU clocks on resume Thomas Petazzoni
2014-11-10 14:12 ` Gregory CLEMENT
2014-10-24 11:59 ` [PATCH 15/17] ARM: mvebu: add suspend/resume DT information for Armada XP GP Thomas Petazzoni
2014-11-10 14:14 ` Gregory CLEMENT
2014-10-24 11:59 ` [PATCH 16/17] ARM: mvebu: adjust mbus controller description on Armada 370/XP Thomas Petazzoni
2014-11-10 14:15 ` Gregory CLEMENT
2014-10-24 11:59 ` [PATCH 17/17] ARM: mvebu: add SDRAM controller description for Armada XP Thomas Petazzoni
2014-11-10 14:25 ` Gregory CLEMENT
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=5457C119.90809@free-electrons.com \
--to=gregory.clement@free-electrons$(echo .)com \
--cc=linux-arm-kernel@lists$(echo .)infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox