Dmitry, David,
On Thu, Feb 20, 2014 at 06:02:35AM +1000, klightspeed@xxxxxxxxxxxxxxxx wrote:
> From: Andrew Lunn <andrew@xxxxxxx>
>
> 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@xxxxxxxxxxxxxxxx>
> Signed-off-by: Andrew Lunn <andrew@xxxxxxx>
> Acked-by: Jason Cooper <jason@xxxxxxxxxxxxxx>
> Cc: Anton Vorontsov <anton@xxxxxxxxxx>
> Cc: Dmitry Eremin-Solenikov <dbaryshkov@xxxxxxxxx>
> Cc: David Woodhouse <dwmw2@xxxxxxxxxxxxx>
> ---
> .../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 <andrew@xxxxxxx>
> *
> @@ -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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