mvebu driver changes for v3.15 (incremental pull #2)

- reset
     - re-use qnap-poweroff driver for Synology NASs
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Merge tag 'mvebu-drivers-3.15-2' of git://git.infradead.org/linux-mvebu into next/drivers

Merge "mvebu drivers for v3.15" from Jason Cooper:

pull request #1:

 - mvebu mbus
    - use of_find_matching_node_and_match

 - rtc
    - use PTR_ERR_OR_ZERO in isl12057
    - work around issue in mv where date returned is 2038

 - kirkwood -> mach-mvebu
    - various Kconfig oneliners to allow building kirkwood in -mvebu/

pull request #2:

 - reset
    - re-use qnap-poweroff driver for Synology NASs

* tag 'mvebu-drivers-3.15-2' of git://git.infradead.org/linux-mvebu:
  Power: Reset: Generalize qnap-poweroff to work on Synology devices.
  drivers: Enable building of Kirkwood drivers for mach-mvebu
  rtc: mv: reset date if after year 2038
  rtc: isl12057: use PTR_ERR_OR_ZERO to fix coccinelle warnings
  bus: mvebu-mbus: make use of of_find_matching_node_and_match

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

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

drivers/bus/mvebu-mbus.c

@@ -890,13 +890,12 @@ int __init mvebu_mbus_dt_init(void)
 	const __be32 *prop;
 	int ret;
 
-	np = of_find_matching_node(NULL, of_mvebu_mbus_ids);
+	np = of_find_matching_node_and_match(NULL, of_mvebu_mbus_ids, &of_id);
 	if (!np) {
 		pr_err("could not find a matching SoC family\n");
 		return -ENODEV;
 	}
 
-	of_id = of_match_node(of_mvebu_mbus_ids, np);
 	mbus_state.soc = of_id->data;
 
 	prop = of_get_property(np, "controller", NULL);

drivers/cpufreq/Kconfig.arm

@@ -113,7 +113,7 @@ config ARM_INTEGRATOR
 	  If in doubt, say Y.
 
 config ARM_KIRKWOOD_CPUFREQ
-	def_bool ARCH_KIRKWOOD && OF
+	def_bool MACH_KIRKWOOD
 	help
 	  This adds the CPUFreq driver for Marvell Kirkwood
 	  SoCs.

drivers/cpuidle/Kconfig.arm

@@ -22,7 +22,7 @@ config ARM_HIGHBANK_CPUIDLE
 
 config ARM_KIRKWOOD_CPUIDLE
 	bool "CPU Idle Driver for Marvell Kirkwood SoCs"
-	depends on ARCH_KIRKWOOD
+	depends on ARCH_KIRKWOOD || MACH_KIRKWOOD
 	help
 	  This adds the CPU Idle driver for Marvell Kirkwood SoCs.
 

drivers/leds/Kconfig

@@ -421,7 +421,7 @@ config LEDS_MC13783
 config LEDS_NS2
 	tristate "LED support for Network Space v2 GPIO LEDs"
 	depends on LEDS_CLASS
-	depends on ARCH_KIRKWOOD
+	depends on ARCH_KIRKWOOD || MACH_KIRKWOOD
 	default y
 	help
 	  This option enable support for the dual-GPIO LED found on the
@@ -431,7 +431,7 @@ config LEDS_NS2
 config LEDS_NETXBIG
 	tristate "LED support for Big Network series LEDs"
 	depends on LEDS_CLASS
-	depends on ARCH_KIRKWOOD
+	depends on ARCH_KIRKWOOD || MACH_KIRKWOOD
 	default y
 	help
 	  This option enable support for LEDs found on the LaCie 2Big

drivers/phy/Kconfig

@@ -24,7 +24,7 @@ config PHY_EXYNOS_MIPI_VIDEO
 
 config PHY_MVEBU_SATA
 	def_bool y
-	depends on ARCH_KIRKWOOD || ARCH_DOVE
+	depends on ARCH_KIRKWOOD || ARCH_DOVE || MACH_KIRKWOOD
 	depends on OF
 	select GENERIC_PHY
 

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@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 * cfg->baud)) / (16 * cfg->baud));
-	const unsigned divisor = ((tclk + (8 * 19200)) / (16 * 19200));
 
 	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 */
+	/* send the power-off command to PIC */
-	writel('A', UART1_REG(TX));
+	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,

drivers/rtc/rtc-isl12057.c

@@ -275,10 +275,7 @@ static int isl12057_probe(struct i2c_client *client,
 	dev_set_drvdata(dev, data);
 
 	rtc = devm_rtc_device_register(dev, DRV_NAME, &rtc_ops, THIS_MODULE);
-	if (IS_ERR(rtc))
+	return PTR_ERR_OR_ZERO(rtc);
-		return PTR_ERR(rtc);
-
-	return 0;
 }
 
 #ifdef CONFIG_OF

drivers/rtc/rtc-mv.c

@@ -222,6 +222,7 @@ static int __init mv_rtc_probe(struct platform_device *pdev)
 	struct resource *res;
 	struct rtc_plat_data *pdata;
 	u32 rtc_time;
+	u32 rtc_date;
 	int ret = 0;
 
 	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
@@ -257,6 +258,17 @@ static int __init mv_rtc_probe(struct platform_device *pdev)
 		}
 	}
 
+	/*
+	 * A date after January 19th, 2038 does not fit on 32 bits and
+	 * will confuse the kernel and userspace. Reset to a sane date
+	 * (January 1st, 2013) if we're after 2038.
+	 */
+	rtc_date = readl(pdata->ioaddr + RTC_DATE_REG_OFFS);
+	if (bcd2bin((rtc_date >> RTC_YEAR_OFFS) & 0xff) >= 38) {
+		dev_info(&pdev->dev, "invalid RTC date, resetting to January 1st, 2013\n");
+		writel(0x130101, pdata->ioaddr + RTC_DATE_REG_OFFS);
+	}
+
 	pdata->irq = platform_get_irq(pdev, 0);
 
 	platform_set_drvdata(pdev, pdata);

drivers/thermal/Kconfig

@@ -142,7 +142,7 @@ config RCAR_THERMAL
 
 config KIRKWOOD_THERMAL
 	tristate "Temperature sensor on Marvell Kirkwood SoCs"
-	depends on ARCH_KIRKWOOD
+	depends on ARCH_KIRKWOOD || MACH_KIRKWOOD
 	depends on OF
 	help
 	  Support for the Kirkwood thermal sensor driver into the Linux thermal

sound/soc/kirkwood/Kconfig

@@ -1,6 +1,6 @@
 config SND_KIRKWOOD_SOC
 	tristate "SoC Audio for the Marvell Kirkwood and Dove chips"
-	depends on ARCH_KIRKWOOD || ARCH_DOVE || COMPILE_TEST
+	depends on ARCH_KIRKWOOD || ARCH_DOVE || MACH_KIRKWOOD || COMPILE_TEST
 	help
 	  Say Y or M if you want to add support for codecs attached to
 	  the Kirkwood I2S interface. You will also need to select the