Dmitry, David, On Thu, Feb 20, 2014 at 06:02:35AM +1000, [email protected] wrote: > From: Andrew Lunn <[email protected]> > > 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 <[email protected]> > Signed-off-by: Andrew Lunn <[email protected]> > Acked-by: Jason Cooper <[email protected]> > Cc: Anton Vorontsov <[email protected]> > Cc: Dmitry Eremin-Solenikov <[email protected]> > Cc: David Woodhouse <[email protected]> > --- > .../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. 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 <[email protected]> > * > @@ -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 > > > _______________________________________________ > linux-arm-kernel mailing list > [email protected] > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
