From mboxrd@z Thu Jan 1 00:00:00 1970 From: klightspeed-aslSrjg9ejhWX4hkXwHRhw@public.gmane.org Subject: [PATCH v4 1/4] Power: Reset: Generalize qnap-poweroff to with on Synology devices. Date: Tue, 18 Feb 2014 07:45:34 +1000 Message-ID: <1392673537-17308-2-git-send-email-klightspeed@killerwolves.net> References: <1392673537-17308-1-git-send-email-klightspeed@killerwolves.net> Return-path: In-Reply-To: <1392673537-17308-1-git-send-email-klightspeed-aslSrjg9ejhWX4hkXwHRhw@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Andrew Lunn Cc: Jason Cooper , Ben Peddell , linux ARM , devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Anton Vorontsov , Dmitry Eremin-Solenikov , David Woodhouse List-Id: devicetree@vger.kernel.org From: Andrew Lunn 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: Andrew Lunn Acked-by: Jason Cooper Cc: Anton Vorontsov Cc: Dmitry Eremin-Solenikov Cc: David Woodhouse --- .../bindings/power_supply/qnap-poweroff.txt | 5 ++- drivers/power/reset/qnap-poweroff.c | 46 +++++++++++++++++----- 2 files changed, 40 insertions(+), 11 deletions(-) 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..10c91fa 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 * @@ -25,17 +25,42 @@ #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 = (void *) &qnap_power_off_cfg, + }, + { .compatible = "synology,power-off", + .data = (void *) &synology_power_off_cfg, + }, + {} +}; + static void __iomem *base; static unsigned long tclk; +static 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 +69,21 @@ 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 = (struct power_off_cfg *)match->data; + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { dev_err(&pdev->dev, "Missing resource"); @@ -94,10 +124,6 @@ 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 = { -- 1.8.3.2 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html From mboxrd@z Thu Jan 1 00:00:00 1970 From: klightspeed@killerwolves.net (klightspeed at killerwolves.net) Date: Tue, 18 Feb 2014 07:45:34 +1000 Subject: [PATCH v4 1/4] Power: Reset: Generalize qnap-poweroff to with on Synology devices. In-Reply-To: <1392673537-17308-1-git-send-email-klightspeed@killerwolves.net> References: <1392673537-17308-1-git-send-email-klightspeed@killerwolves.net> Message-ID: <1392673537-17308-2-git-send-email-klightspeed@killerwolves.net> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Andrew Lunn 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: Andrew Lunn Acked-by: Jason Cooper Cc: Anton Vorontsov Cc: Dmitry Eremin-Solenikov Cc: David Woodhouse --- .../bindings/power_supply/qnap-poweroff.txt | 5 ++- drivers/power/reset/qnap-poweroff.c | 46 +++++++++++++++++----- 2 files changed, 40 insertions(+), 11 deletions(-) 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..10c91fa 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 * @@ -25,17 +25,42 @@ #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 = (void *) &qnap_power_off_cfg, + }, + { .compatible = "synology,power-off", + .data = (void *) &synology_power_off_cfg, + }, + {} +}; + static void __iomem *base; static unsigned long tclk; +static 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 +69,21 @@ 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 = (struct power_off_cfg *)match->data; + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { dev_err(&pdev->dev, "Missing resource"); @@ -94,10 +124,6 @@ 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 = { -- 1.8.3.2