[PATCH v7 2/4] Power: Reset: Generalize qnap-poweroff to work on Synology devices.
Jason Cooper
jason at lakedaemon.net
Mon Mar 3 22:54:13 EST 2014
On Fri, Feb 21, 2014 at 08:39:54PM -0500, Jason Cooper wrote:
> Dmitry, David,
>
> On Thu, Feb 20, 2014 at 06:02:35AM +1000, klightspeed at killerwolves.net wrote:
> > From: Andrew Lunn <andrew at lunn.ch>
> >
> > The Synology NAS devices use a very similar mechanism to QNAP NAS
> > devices to power off. Both send a single charactor command to a PIC,
> > over the second serial port. However the baud rate and the command
> > differ. Generalize the driver to support this.
> >
> > Signed-off-by: Ben Peddell <klightspeed at killerwolves.net>
> > Signed-off-by: Andrew Lunn <andrew at lunn.ch>
> > Acked-by: Jason Cooper <jason at lakedaemon.net>
> > Cc: Anton Vorontsov <anton at enomsg.org>
> > Cc: Dmitry Eremin-Solenikov <dbaryshkov at gmail.com>
> > Cc: David Woodhouse <dwmw2 at infradead.org>
> > ---
> > .../bindings/power_supply/qnap-poweroff.txt | 5 ++-
> > drivers/power/reset/qnap-poweroff.c | 49 ++++++++++++++++------
> > 2 files changed, 41 insertions(+), 13 deletions(-)
>
> Do you guys want to take this, or me? I'm fine either way, there's no
> dependencies.
Hmmm, it's been over a week. Since it's isolated to a driver only
kirkwood/mvebu devices use, I'll go ahead a queue this up to go through
mvebu/arm-soc for v3.15. Please ping me in the next few days if you'd
prefer I drop it.
Applied to mvebu/drivers
thx,
Jason.
> > diff --git a/Documentation/devicetree/bindings/power_supply/qnap-poweroff.txt b/Documentation/devicetree/bindings/power_supply/qnap-poweroff.txt
> > index 0347d83..af25e77 100644
> > --- a/Documentation/devicetree/bindings/power_supply/qnap-poweroff.txt
> > +++ b/Documentation/devicetree/bindings/power_supply/qnap-poweroff.txt
> > @@ -6,8 +6,11 @@ Orion5x SoCs. Sending the character 'A', at 19200 baud, tells the
> > microcontroller to turn the power off. This driver adds a handler to
> > pm_power_off which is called to turn the power off.
> >
> > +Synology NAS devices use a similar scheme, but a different baud rate,
> > +9600, and a different character, '1'.
> > +
> > Required Properties:
> > -- compatible: Should be "qnap,power-off"
> > +- compatible: Should be "qnap,power-off" or "synology,power-off"
> >
> > - reg: Address and length of the register set for UART1
> > - clocks: tclk clock
> > diff --git a/drivers/power/reset/qnap-poweroff.c b/drivers/power/reset/qnap-poweroff.c
> > index 37f56f7..a75db7f 100644
> > --- a/drivers/power/reset/qnap-poweroff.c
> > +++ b/drivers/power/reset/qnap-poweroff.c
> > @@ -1,5 +1,5 @@
> > /*
> > - * QNAP Turbo NAS Board power off
> > + * QNAP Turbo NAS Board power off. Can also be used on Synology devices.
> > *
> > * Copyright (C) 2012 Andrew Lunn <andrew at lunn.ch>
> > *
> > @@ -25,17 +25,43 @@
> >
> > #define UART1_REG(x) (base + ((UART_##x) << 2))
> >
> > +struct power_off_cfg {
> > + u32 baud;
> > + char cmd;
> > +};
> > +
> > +static const struct power_off_cfg qnap_power_off_cfg = {
> > + .baud = 19200,
> > + .cmd = 'A',
> > +};
> > +
> > +static const struct power_off_cfg synology_power_off_cfg = {
> > + .baud = 9600,
> > + .cmd = '1',
> > +};
> > +
> > +static const struct of_device_id qnap_power_off_of_match_table[] = {
> > + { .compatible = "qnap,power-off",
> > + .data = &qnap_power_off_cfg,
> > + },
> > + { .compatible = "synology,power-off",
> > + .data = &synology_power_off_cfg,
> > + },
> > + {}
> > +};
> > +MODULE_DEVICE_TABLE(of, qnap_power_off_of_match_table);
> > +
> > static void __iomem *base;
> > static unsigned long tclk;
> > +static const struct power_off_cfg *cfg;
> >
> > static void qnap_power_off(void)
> > {
> > - /* 19200 baud divisor */
> > - const unsigned divisor = ((tclk + (8 * 19200)) / (16 * 19200));
> > + const unsigned divisor = ((tclk + (8 * cfg->baud)) / (16 * cfg->baud));
> >
> > pr_err("%s: triggering power-off...\n", __func__);
> >
> > - /* hijack UART1 and reset into sane state (19200,8n1) */
> > + /* hijack UART1 and reset into sane state */
> > writel(0x83, UART1_REG(LCR));
> > writel(divisor & 0xff, UART1_REG(DLL));
> > writel((divisor >> 8) & 0xff, UART1_REG(DLM));
> > @@ -44,16 +70,21 @@ static void qnap_power_off(void)
> > writel(0x00, UART1_REG(FCR));
> > writel(0x00, UART1_REG(MCR));
> >
> > - /* send the power-off command 'A' to PIC */
> > - writel('A', UART1_REG(TX));
> > + /* send the power-off command to PIC */
> > + writel(cfg->cmd, UART1_REG(TX));
> > }
> >
> > static int qnap_power_off_probe(struct platform_device *pdev)
> > {
> > + struct device_node *np = pdev->dev.of_node;
> > struct resource *res;
> > struct clk *clk;
> > char symname[KSYM_NAME_LEN];
> >
> > + const struct of_device_id *match =
> > + of_match_node(qnap_power_off_of_match_table, np);
> > + cfg = match->data;
> > +
> > res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > if (!res) {
> > dev_err(&pdev->dev, "Missing resource");
> > @@ -94,12 +125,6 @@ static int qnap_power_off_remove(struct platform_device *pdev)
> > return 0;
> > }
> >
> > -static const struct of_device_id qnap_power_off_of_match_table[] = {
> > - { .compatible = "qnap,power-off", },
> > - {}
> > -};
> > -MODULE_DEVICE_TABLE(of, qnap_power_off_of_match_table);
> > -
> > static struct platform_driver qnap_power_off_driver = {
> > .probe = qnap_power_off_probe,
> > .remove = qnap_power_off_remove,
> > --
> > 1.8.3.2
> >
> >
> > _______________________________________________
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> > linux-arm-kernel at lists.infradead.org
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