Merge tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux-2.6

Changes queued in gpio/next for the start of the 3.3 merge window

* tag 'gpio-for-linus-20120104' of git://git.secretlab.ca/git/linux-2.6:
  gpio: Add decode of WM8994 GPIO configuration
  gpio: Convert GPIO drivers to module_platform_driver
  gpio: Fix typo in comment in Samsung driver
  gpio: Explicitly index samsung_gpio_cfgs
  gpio: Add Linus Walleij as gpio co-maintainer
  of: Add device tree selftests
  of: create of_phandle_args to simplify return of phandle parsing data
  gpio/powerpc: Eliminate duplication of of_get_named_gpio_flags()
  gpio/microblaze: Eliminate duplication of of_get_named_gpio_flags()
  gpiolib: output basic details and consolidate gpio device drivers
  pch_gpio: Change company name OKI SEMICONDUCTOR to LAPIS Semiconductor
  pch_gpio: Support new device LAPIS Semiconductor ML7831 IOH
  spi/pl022: make the chip deselect handling thread safe
  spi/pl022: add support for pm_runtime autosuspend
  spi/pl022: disable the PL022 block when unused
  spi/pl022: move device disable to workqueue thread
  spi/pl022: skip default configuration before suspending
  spi/pl022: fix build warnings
  spi/pl022: only enable RX interrupts when TX is complete

MAINTAINERS

@@ -2912,6 +2912,7 @@ F:	include/linux/gigaset_dev.h
 
 GPIO SUBSYSTEM
 M:	Grant Likely <grant.likely@secretlab.ca>
+M:	Linus Walleij <linus.walleij@stericsson.com>
 S:	Maintained
 T:	git git://git.secretlab.ca/git/linux-2.6.git
 F:	Documentation/gpio.txt

arch/arm/boot/dts/testcases/tests-phandle.dtsi

@@ -0,0 +1,37 @@
+
+/ {
+	testcase-data {
+		phandle-tests {
+			provider0: provider0 {
+				#phandle-cells = <0>;
+			};
+
+			provider1: provider1 {
+				#phandle-cells = <1>;
+			};
+
+			provider2: provider2 {
+				#phandle-cells = <2>;
+			};
+
+			provider3: provider3 {
+				#phandle-cells = <3>;
+			};
+
+			consumer-a {
+				phandle-list =	<&provider1 1>,
+						<&provider2 2 0>,
+						<0>,
+						<&provider3 4 4 3>,
+						<&provider2 5 100>,
+						<&provider0>,
+						<&provider1 7>;
+				phandle-list-names = "first", "second", "third";
+
+				phandle-list-bad-phandle = <12345678 0 0>;
+				phandle-list-bad-args = <&provider2 1 0>,
+							<&provider3 0>;
+			};
+		};
+	};
+};

arch/arm/boot/dts/testcases/tests.dtsi

@@ -0,0 +1 @@
+/include/ "tests-phandle.dtsi"

arch/arm/boot/dts/versatile-pb.dts

@@ -46,3 +46,5 @@
 		};
 	};
 };
+
+/include/ "testcases/tests.dtsi"

arch/microblaze/kernel/reset.c

@@ -19,50 +19,11 @@
 static int handle; /* reset pin handle */
 static unsigned int reset_val;
 
-static int of_reset_gpio_handle(void)
-{
-	int ret; /* variable which stored handle reset gpio pin */
-	struct device_node *root; /* root node */
-	struct device_node *gpio; /* gpio node */
-	struct gpio_chip *gc;
-	u32 flags;
-	const void *gpio_spec;
-
-	/* find out root node */
-	root = of_find_node_by_path("/");
-
-	/* give me handle for gpio node to be possible allocate pin */
-	ret = of_parse_phandles_with_args(root, "hard-reset-gpios",
-				"#gpio-cells", 0, &gpio, &gpio_spec);
-	if (ret) {
-		pr_debug("%s: can't parse gpios property\n", __func__);
-		goto err0;
-	}
-
-	gc = of_node_to_gpiochip(gpio);
-	if (!gc) {
-		pr_debug("%s: gpio controller %s isn't registered\n",
-			 root->full_name, gpio->full_name);
-		ret = -ENODEV;
-		goto err1;
-	}
-
-	ret = gc->of_xlate(gc, root, gpio_spec, &flags);
-	if (ret < 0)
-		goto err1;
-
-	ret += gc->base;
-err1:
-	of_node_put(gpio);
-err0:
-	pr_debug("%s exited with status %d\n", __func__, ret);
-	return ret;
-}
-
 void of_platform_reset_gpio_probe(void)
 {
 	int ret;
-	handle = of_reset_gpio_handle();
+	handle = of_get_named_gpio(of_find_node_by_path("/"),
+				   "hard-reset-gpios", 0);
 
 	if (!gpio_is_valid(handle)) {
 		printk(KERN_INFO "Skipping unavailable RESET gpio %d (%s)\n",

arch/powerpc/sysdev/qe_lib/gpio.c

@@ -139,14 +139,10 @@ struct qe_pin {
 struct qe_pin *qe_pin_request(struct device_node *np, int index)
 {
 	struct qe_pin *qe_pin;
-	struct device_node *gpio_np;
 	struct gpio_chip *gc;
 	struct of_mm_gpio_chip *mm_gc;
 	struct qe_gpio_chip *qe_gc;
 	int err;
-	int size;
-	const void *gpio_spec;
-	const u32 *gpio_cells;
 	unsigned long flags;
 
 	qe_pin = kzalloc(sizeof(*qe_pin), GFP_KERNEL);
@@ -155,45 +151,25 @@ struct qe_pin *qe_pin_request(struct device_node *np, int index)
 		return ERR_PTR(-ENOMEM);
 	}
 
-	err = of_parse_phandles_with_args(np, "gpios", "#gpio-cells", index,
-					  &gpio_np, &gpio_spec);
-	if (err) {
-		pr_debug("%s: can't parse gpios property\n", __func__);
+	err = of_get_gpio(np, index);
+	if (err < 0)
+		goto err0;
+	gc = gpio_to_chip(err);
+	if (WARN_ON(!gc))
 		goto err0;
-	}
 
-	if (!of_device_is_compatible(gpio_np, "fsl,mpc8323-qe-pario-bank")) {
+	if (!of_device_is_compatible(gc->of_node, "fsl,mpc8323-qe-pario-bank")) {
 		pr_debug("%s: tried to get a non-qe pin\n", __func__);
 		err = -EINVAL;
-		goto err1;
-	}
-
-	gc = of_node_to_gpiochip(gpio_np);
-	if (!gc) {
-		pr_debug("%s: gpio controller %s isn't registered\n",
-			 np->full_name, gpio_np->full_name);
-		err = -ENODEV;
-		goto err1;
-	}
-
-	gpio_cells = of_get_property(gpio_np, "#gpio-cells", &size);
-	if (!gpio_cells || size != sizeof(*gpio_cells) ||
-			*gpio_cells != gc->of_gpio_n_cells) {
-		pr_debug("%s: wrong #gpio-cells for %s\n",
-			 np->full_name, gpio_np->full_name);
-		err = -EINVAL;
-		goto err1;
+		goto err0;
 	}
 
-	err = gc->of_xlate(gc, np, gpio_spec, NULL);
-	if (err < 0)
-		goto err1;
-
 	mm_gc = to_of_mm_gpio_chip(gc);
 	qe_gc = to_qe_gpio_chip(mm_gc);
 
 	spin_lock_irqsave(&qe_gc->lock, flags);
 
+	err -= gc->base;
 	if (test_and_set_bit(QE_PIN_REQUESTED, &qe_gc->pin_flags[err]) == 0) {
 		qe_pin->controller = qe_gc;
 		qe_pin->num = err;
@@ -206,8 +182,6 @@ struct qe_pin *qe_pin_request(struct device_node *np, int index)
 
 	if (!err)
 		return qe_pin;
-err1:
-	of_node_put(gpio_np);
 err0:
 	kfree(qe_pin);
 	pr_debug("%s failed with status %d\n", __func__, err);

drivers/gpio/Kconfig

@@ -387,7 +387,7 @@ config GPIO_LANGWELL
 	  Say Y here to support Intel Langwell/Penwell GPIO.
 
 config GPIO_PCH
-	tristate "Intel EG20T PCH / OKI SEMICONDUCTOR ML7223 IOH GPIO"
+	tristate "Intel EG20T PCH/LAPIS Semiconductor IOH(ML7223/ML7831) GPIO"
 	depends on PCI && X86
 	select GENERIC_IRQ_CHIP
 	help
@@ -395,11 +395,12 @@ config GPIO_PCH
 	  which is an IOH(Input/Output Hub) for x86 embedded processor.
 	  This driver can access PCH GPIO device.
 
-	  This driver also can be used for OKI SEMICONDUCTOR IOH(Input/
-	  Output Hub), ML7223.
+	  This driver also can be used for LAPIS Semiconductor IOH(Input/
+	  Output Hub), ML7223 and ML7831.
 	  ML7223 IOH is for MP(Media Phone) use.
-	  ML7223 is companion chip for Intel Atom E6xx series.
-	  ML7223 is completely compatible for Intel EG20T PCH.
+	  ML7831 IOH is for general purpose use.
+	  ML7223/ML7831 is companion chip for Intel Atom E6xx series.
+	  ML7223/ML7831 is completely compatible for Intel EG20T PCH.
 
 config GPIO_ML_IOH
 	tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support"

drivers/gpio/gpio-adp5520.c

@@ -193,17 +193,7 @@ static struct platform_driver adp5520_gpio_driver = {
 	.remove		= __devexit_p(adp5520_gpio_remove),
 };
 
-static int __init adp5520_gpio_init(void)
-{
-	return platform_driver_register(&adp5520_gpio_driver);
-}
-module_init(adp5520_gpio_init);
-
-static void __exit adp5520_gpio_exit(void)
-{
-	platform_driver_unregister(&adp5520_gpio_driver);
-}
-module_exit(adp5520_gpio_exit);
+module_platform_driver(adp5520_gpio_driver);
 
 MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
 MODULE_DESCRIPTION("GPIO ADP5520 Driver");

drivers/gpio/gpio-adp5588.c

@@ -418,9 +418,8 @@ static int __devinit adp5588_gpio_probe(struct i2c_client *client,
 	if (ret)
 		goto err_irq;
 
-	dev_info(&client->dev, "gpios %d..%d (IRQ Base %d) on a %s Rev. %d\n",
-			gc->base, gc->base + gc->ngpio - 1,
-			pdata->irq_base, client->name, revid);
+	dev_info(&client->dev, "IRQ Base: %d Rev.: %d\n",
+			pdata->irq_base, revid);
 
 	if (pdata->setup) {
 		ret = pdata->setup(client, gc->base, gc->ngpio, pdata->context);

drivers/gpio/gpio-bt8xx.c

@@ -223,9 +223,6 @@ static int bt8xxgpio_probe(struct pci_dev *dev,
 		goto err_release_mem;
 	}
 
-	printk(KERN_INFO "bt8xxgpio: Abusing BT8xx card for GPIOs %d to %d\n",
-	       bg->gpio.base, bg->gpio.base + BT8XXGPIO_NR_GPIOS - 1);
-
 	return 0;
 
 err_release_mem:

drivers/gpio/gpio-cs5535.c

@@ -347,7 +347,6 @@ static int __devinit cs5535_gpio_probe(struct platform_device *pdev)
 	if (err)
 		goto release_region;
 
-	dev_info(&pdev->dev, "GPIO support successfully loaded.\n");
 	return 0;
 
 release_region:
@@ -382,18 +381,7 @@ static struct platform_driver cs5535_gpio_driver = {
 	.remove = __devexit_p(cs5535_gpio_remove),
 };
 
-static int __init cs5535_gpio_init(void)
-{
-	return platform_driver_register(&cs5535_gpio_driver);
-}
-
-static void __exit cs5535_gpio_exit(void)
-{
-	platform_driver_unregister(&cs5535_gpio_driver);
-}
-
-module_init(cs5535_gpio_init);
-module_exit(cs5535_gpio_exit);
+module_platform_driver(cs5535_gpio_driver);
 
 MODULE_AUTHOR("Andres Salomon <dilinger@queued.net>");
 MODULE_DESCRIPTION("AMD CS5535/CS5536 GPIO driver");

drivers/gpio/gpio-da9052.c

@@ -254,17 +254,7 @@ static struct platform_driver da9052_gpio_driver = {
 	},
 };
 
-static int __init da9052_gpio_init(void)
-{
-	return platform_driver_register(&da9052_gpio_driver);
-}
-module_init(da9052_gpio_init);
-
-static void __exit da9052_gpio_exit(void)
-{
-	return platform_driver_unregister(&da9052_gpio_driver);
-}
-module_exit(da9052_gpio_exit);
+module_platform_driver(da9052_gpio_driver);
 
 MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
 MODULE_DESCRIPTION("DA9052 GPIO Device Driver");

drivers/gpio/gpio-generic.c

@@ -524,17 +524,7 @@ static struct platform_driver bgpio_driver = {
 	.remove = __devexit_p(bgpio_pdev_remove),
 };
 
-static int __init bgpio_platform_init(void)
-{
-	return platform_driver_register(&bgpio_driver);
-}
-module_init(bgpio_platform_init);
-
-static void __exit bgpio_platform_exit(void)
-{
-	platform_driver_unregister(&bgpio_driver);
-}
-module_exit(bgpio_platform_exit);
+module_platform_driver(bgpio_driver);
 
 #endif /* CONFIG_GPIO_GENERIC_PLATFORM */
 

drivers/gpio/gpio-janz-ttl.c

@@ -201,8 +201,6 @@ static int __devinit ttl_probe(struct platform_device *pdev)
 		goto out_iounmap_regs;
 	}
 
-	dev_info(&pdev->dev, "module %d: registered GPIO device\n",
-			     pdata->modno);
 	return 0;
 
 out_iounmap_regs:
@@ -239,20 +237,9 @@ static struct platform_driver ttl_driver = {
 	.remove		= __devexit_p(ttl_remove),
 };
 
-static int __init ttl_init(void)
-{
-	return platform_driver_register(&ttl_driver);
-}
-
-static void __exit ttl_exit(void)
-{
-	platform_driver_unregister(&ttl_driver);
-}
+module_platform_driver(ttl_driver);
 
 MODULE_AUTHOR("Ira W. Snyder <iws@ovro.caltech.edu>");
 MODULE_DESCRIPTION("Janz MODULbus VMOD-TTL Driver");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("platform:janz-ttl");
-
-module_init(ttl_init);
-module_exit(ttl_exit);

drivers/gpio/gpio-nomadik.c

@@ -1150,8 +1150,8 @@ static int __devinit nmk_gpio_probe(struct platform_device *dev)
 
 	nmk_gpio_init_irq(nmk_chip);
 
-	dev_info(&dev->dev, "Bits %i-%i at address %p\n",
-		 nmk_chip->chip.base, nmk_chip->chip.base+31, nmk_chip->addr);
+	dev_info(&dev->dev, "at address %p\n",
+		 nmk_chip->addr);
 	return 0;
 
 out_free:

drivers/gpio/gpio-pcf857x.c

@@ -290,10 +290,7 @@ static int pcf857x_probe(struct i2c_client *client,
 	 * methods can't be called from sleeping contexts.
 	 */
 
-	dev_info(&client->dev, "gpios %d..%d on a %s%s\n",
-			gpio->chip.base,
-			gpio->chip.base + gpio->chip.ngpio - 1,
-			client->name,
+	dev_info(&client->dev, "%s\n",
 			client->irq ? " (irq ignored)" : "");
 
 	/* Let platform code set up the GPIOs and their users.

drivers/gpio/gpio-pch.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2010 OKI SEMICONDUCTOR Co., LTD.
+ * Copyright (C) 2011 LAPIS Semiconductor Co., Ltd.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -49,8 +49,8 @@ struct pch_regs {
 
 enum pch_type_t {
 	INTEL_EG20T_PCH,
-	OKISEMI_ML7223m_IOH, /* OKISEMI ML7223 IOH PCIe Bus-m */
-	OKISEMI_ML7223n_IOH  /* OKISEMI ML7223 IOH PCIe Bus-n */
+	OKISEMI_ML7223m_IOH, /* LAPIS Semiconductor ML7223 IOH PCIe Bus-m */
+	OKISEMI_ML7223n_IOH  /* LAPIS Semiconductor ML7223 IOH PCIe Bus-n */
 };
 
 /* Specifies number of GPIO PINS */
@@ -524,6 +524,7 @@ static DEFINE_PCI_DEVICE_TABLE(pch_gpio_pcidev_id) = {
 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x8803) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_ROHM, 0x8014) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_ROHM, 0x8043) },
+	{ PCI_DEVICE(PCI_VENDOR_ID_ROHM, 0x8803) },
 	{ 0, }
 };
 MODULE_DEVICE_TABLE(pci, pch_gpio_pcidev_id);

drivers/gpio/gpio-rdc321x.c

@@ -227,18 +227,7 @@ static struct platform_driver rdc321x_gpio_driver = {
 	.remove		= __devexit_p(rdc321x_gpio_remove),
 };
 
-static int __init rdc321x_gpio_init(void)
-{
-	return platform_driver_register(&rdc321x_gpio_driver);
-}
-
-static void __exit rdc321x_gpio_exit(void)
-{
-	platform_driver_unregister(&rdc321x_gpio_driver);
-}
-
-module_init(rdc321x_gpio_init);
-module_exit(rdc321x_gpio_exit);
+module_platform_driver(rdc321x_gpio_driver);
 
 MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
 MODULE_DESCRIPTION("RDC321x GPIO driver");

drivers/gpio/gpio-samsung.c

@@ -230,7 +230,7 @@ static int samsung_gpio_setcfg_2bit(struct samsung_gpio_chip *chip,
  * @chip: The gpio chip that is being configured.
  * @off: The offset for the GPIO being configured.
  *
- * The reverse of samsung_gpio_setcfg_2bit(). Will return a value whicg
+ * The reverse of samsung_gpio_setcfg_2bit(). Will return a value which
  * could be directly passed back to samsung_gpio_setcfg_2bit(), from the
  * S3C_GPIO_SPECIAL() macro.
  */
@@ -467,33 +467,42 @@ static struct samsung_gpio_cfg s5p64x0_gpio_cfg_rbank = {
 #endif
 
 static struct samsung_gpio_cfg samsung_gpio_cfgs[] = {
-	{
+	[0] = {
 		.cfg_eint	= 0x0,
-	}, {
+	},
+	[1] = {
 		.cfg_eint	= 0x3,
-	}, {
+	},
+	[2] = {
 		.cfg_eint	= 0x7,
-	}, {
+	},
+	[3] = {
 		.cfg_eint	= 0xF,
-	}, {
+	},
+	[4] = {
 		.cfg_eint	= 0x0,
 		.set_config	= samsung_gpio_setcfg_2bit,
 		.get_config	= samsung_gpio_getcfg_2bit,
-	}, {
+	},
+	[5] = {
 		.cfg_eint	= 0x2,
 		.set_config	= samsung_gpio_setcfg_2bit,
 		.get_config	= samsung_gpio_getcfg_2bit,
-	}, {
+	},
+	[6] = {
 		.cfg_eint	= 0x3,
 		.set_config	= samsung_gpio_setcfg_2bit,
 		.get_config	= samsung_gpio_getcfg_2bit,
-	}, {
+	},
+	[7] = {
 		.set_config	= samsung_gpio_setcfg_2bit,
 		.get_config	= samsung_gpio_getcfg_2bit,
-	}, {
+	},
+	[8] = {
 		.set_pull	= exynos4_gpio_setpull,
 		.get_pull	= exynos4_gpio_getpull,
-	}, {
+	},
+	[9] = {
 		.cfg_eint	= 0x3,
 		.set_pull	= exynos4_gpio_setpull,
 		.get_pull	= exynos4_gpio_getpull,

drivers/gpio/gpio-sch.c

@@ -297,18 +297,7 @@ static struct platform_driver sch_gpio_driver = {
 	.remove		= __devexit_p(sch_gpio_remove),
 };
 
-static int __init sch_gpio_init(void)
-{
-	return platform_driver_register(&sch_gpio_driver);
-}
-
-static void __exit sch_gpio_exit(void)
-{
-	platform_driver_unregister(&sch_gpio_driver);
-}
-
-module_init(sch_gpio_init);
-module_exit(sch_gpio_exit);
+module_platform_driver(sch_gpio_driver);
 
 MODULE_AUTHOR("Denis Turischev <denis@compulab.co.il>");
 MODULE_DESCRIPTION("GPIO interface for Intel Poulsbo SCH");

drivers/gpio/gpio-timberdale.c

@@ -359,18 +359,7 @@ static struct platform_driver timbgpio_platform_driver = {
 
 /*--------------------------------------------------------------------------*/
 
-static int __init timbgpio_init(void)
-{
-	return platform_driver_register(&timbgpio_platform_driver);
-}
-
-static void __exit timbgpio_exit(void)
-{
-	platform_driver_unregister(&timbgpio_platform_driver);
-}
-
-module_init(timbgpio_init);
-module_exit(timbgpio_exit);
+module_platform_driver(timbgpio_platform_driver);
 
 MODULE_DESCRIPTION("Timberdale GPIO driver");
 MODULE_LICENSE("GPL v2");

drivers/gpio/gpio-ucb1400.c

@@ -103,23 +103,12 @@ static struct platform_driver ucb1400_gpio_driver = {
 	},
 };
 
-static int __init ucb1400_gpio_init(void)
-{
-	return platform_driver_register(&ucb1400_gpio_driver);
-}
-
-static void __exit ucb1400_gpio_exit(void)
-{
-	platform_driver_unregister(&ucb1400_gpio_driver);
-}
-
 void __init ucb1400_gpio_set_data(struct ucb1400_gpio_data *data)
 {
 	ucbdata = data;
 }
 
-module_init(ucb1400_gpio_init);
-module_exit(ucb1400_gpio_exit);
+module_platform_driver(ucb1400_gpio_driver);
 
 MODULE_DESCRIPTION("Philips UCB1400 GPIO driver");
 MODULE_LICENSE("GPL");

drivers/gpio/gpio-vr41xx.c

@@ -571,15 +571,4 @@ static struct platform_driver giu_device_driver = {
 	},
 };
 
-static int __init vr41xx_giu_init(void)
-{
-	return platform_driver_register(&giu_device_driver);
-}
-
-static void __exit vr41xx_giu_exit(void)
-{
-	platform_driver_unregister(&giu_device_driver);
-}
-
-module_init(vr41xx_giu_init);
-module_exit(vr41xx_giu_exit);
+module_platform_driver(giu_device_driver);

drivers/gpio/gpio-vx855.c

@@ -315,17 +315,7 @@ static struct platform_driver vx855gpio_driver = {
 	.remove		= __devexit_p(vx855gpio_remove),
 };
 
-static int vx855gpio_init(void)
-{
-	return platform_driver_register(&vx855gpio_driver);
-}
-module_init(vx855gpio_init);
-
-static void vx855gpio_exit(void)
-{
-	platform_driver_unregister(&vx855gpio_driver);
-}
-module_exit(vx855gpio_exit);
+module_platform_driver(vx855gpio_driver);
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Harald Welte <HaraldWelte@viatech.com>");

drivers/gpio/gpio-wm8994.c

@@ -117,6 +117,60 @@ static int wm8994_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
 
 
 #ifdef CONFIG_DEBUG_FS
+static const char *wm8994_gpio_fn(u16 fn)
+{
+	switch (fn) {
+	case WM8994_GP_FN_PIN_SPECIFIC:
+		return "pin-specific";
+	case WM8994_GP_FN_GPIO:
+		return "GPIO";
+	case WM8994_GP_FN_SDOUT:
+		return "SDOUT";
+	case WM8994_GP_FN_IRQ:
+		return "IRQ";
+	case WM8994_GP_FN_TEMPERATURE:
+		return "Temperature";
+	case WM8994_GP_FN_MICBIAS1_DET:
+		return "MICBIAS1 detect";
+	case WM8994_GP_FN_MICBIAS1_SHORT:
+		return "MICBIAS1 short";
+	case WM8994_GP_FN_MICBIAS2_DET:
+		return "MICBIAS2 detect";
+	case WM8994_GP_FN_MICBIAS2_SHORT:
+		return "MICBIAS2 short";
+	case WM8994_GP_FN_FLL1_LOCK:
+		return "FLL1 lock";
+	case WM8994_GP_FN_FLL2_LOCK:
+		return "FLL2 lock";
+	case WM8994_GP_FN_SRC1_LOCK:
+		return "SRC1 lock";
+	case WM8994_GP_FN_SRC2_LOCK:
+		return "SRC2 lock";
+	case WM8994_GP_FN_DRC1_ACT:
+		return "DRC1 activity";
+	case WM8994_GP_FN_DRC2_ACT:
+		return "DRC2 activity";
+	case WM8994_GP_FN_DRC3_ACT:
+		return "DRC3 activity";
+	case WM8994_GP_FN_WSEQ_STATUS:
+		return "Write sequencer";
+	case WM8994_GP_FN_FIFO_ERROR:
+		return "FIFO error";
+	case WM8994_GP_FN_OPCLK:
+		return "OPCLK";
+	case WM8994_GP_FN_THW:
+		return "Thermal warning";
+	case WM8994_GP_FN_DCS_DONE:
+		return "DC servo";
+	case WM8994_GP_FN_FLL1_OUT:
+		return "FLL1 output";
+	case WM8994_GP_FN_FLL2_OUT:
+		return "FLL1 output";
+	default:
+		return "Unknown";
+	}
+}
+
 static void wm8994_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
 {
 	struct wm8994_gpio *wm8994_gpio = to_wm8994_gpio(chip);
@@ -148,8 +202,29 @@ static void wm8994_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
 			continue;
 		}
 
-		/* No decode yet; note that GPIO2 is special */
-		seq_printf(s, "(%x)\n", reg);
+		if (reg & WM8994_GPN_DIR)
+			seq_printf(s, "in ");
+		else
+			seq_printf(s, "out ");
+
+		if (reg & WM8994_GPN_PU)
+			seq_printf(s, "pull up ");
+
+		if (reg & WM8994_GPN_PD)
+			seq_printf(s, "pull down ");
+
+		if (reg & WM8994_GPN_POL)
+			seq_printf(s, "inverted ");
+		else
+			seq_printf(s, "noninverted ");
+
+		if (reg & WM8994_GPN_OP_CFG)
+			seq_printf(s, "open drain ");
+		else
+			seq_printf(s, "CMOS ");
+
+		seq_printf(s, "%s (%x)\n",
+			   wm8994_gpio_fn(reg & WM8994_GPN_FN_MASK), reg);
 	}
 }
 #else

drivers/gpio/gpio-xilinx.c

@@ -206,7 +206,6 @@ static int __devinit xgpio_of_probe(struct device_node *np)
 		       np->full_name, status);
 		return status;
 	}
-	pr_info("XGpio: %s: registered\n", np->full_name);
 	return 0;
 }
 

drivers/gpio/gpiolib.c

@@ -114,7 +114,7 @@ static int gpio_ensure_requested(struct gpio_desc *desc, unsigned offset)
 }
 
 /* caller holds gpio_lock *OR* gpio is marked as requested */
-static inline struct gpio_chip *gpio_to_chip(unsigned gpio)
+struct gpio_chip *gpio_to_chip(unsigned gpio)
 {
 	return gpio_desc[gpio].chip;
 }
@@ -1089,6 +1089,10 @@ unlock:
 	if (status)
 		goto fail;
 
+	pr_info("gpiochip_add: registered GPIOs %d to %d on device: %s\n",
+		chip->base, chip->base + chip->ngpio - 1,
+		chip->label ? : "generic");
+
 	return 0;
 fail:
 	/* failures here can mean systems won't boot... */

drivers/of/Kconfig

@@ -15,6 +15,15 @@ config PROC_DEVICETREE
 	  an image of the device tree that the kernel copies from Open
 	  Firmware or other boot firmware. If unsure, say Y here.
 
+config OF_SELFTEST
+	bool "Device Tree Runtime self tests"
+	help
+	  This option builds in test cases for the device tree infrastructure
+	  that are executed one at boot time, and the results dumped to the
+	  console.
+
+	  If unsure, say N here, but this option is safe to enable.
+
 config OF_FLATTREE
 	bool
 	select DTC

drivers/of/Makefile

@@ -8,6 +8,7 @@ obj-$(CONFIG_OF_GPIO)   += gpio.o
 obj-$(CONFIG_OF_I2C)	+= of_i2c.o
 obj-$(CONFIG_OF_NET)	+= of_net.o
 obj-$(CONFIG_OF_SPI)	+= of_spi.o
+obj-$(CONFIG_OF_SELFTEST) += selftest.o
 obj-$(CONFIG_OF_MDIO)	+= of_mdio.o
 obj-$(CONFIG_OF_PCI)	+= of_pci.o
 obj-$(CONFIG_OF_PCI_IRQ)  += of_pci_irq.o

drivers/of/base.c

@@ -824,17 +824,19 @@ of_parse_phandle(struct device_node *np, const char *phandle_name, int index)
 EXPORT_SYMBOL(of_parse_phandle);
 
 /**
- * of_parse_phandles_with_args - Find a node pointed by phandle in a list
+ * of_parse_phandle_with_args() - Find a node pointed by phandle in a list
  * @np:		pointer to a device tree node containing a list
  * @list_name:	property name that contains a list
  * @cells_name:	property name that specifies phandles' arguments count
  * @index:	index of a phandle to parse out
- * @out_node:	optional pointer to device_node struct pointer (will be filled)
- * @out_args:	optional pointer to arguments pointer (will be filled)
+ * @out_args:	optional pointer to output arguments structure (will be filled)
  *
  * This function is useful to parse lists of phandles and their arguments.
- * Returns 0 on success and fills out_node and out_args, on error returns
- * appropriate errno value.
+ * Returns 0 on success and fills out_args, on error returns appropriate
+ * errno value.
+ *
+ * Caller is responsible to call of_node_put() on the returned out_args->node
+ * pointer.
  *
  * Example:
  *
@@ -851,94 +853,96 @@ EXPORT_SYMBOL(of_parse_phandle);
  * }
  *
  * To get a device_node of the `node2' node you may call this:
- * of_parse_phandles_with_args(node3, "list", "#list-cells", 2, &node2, &args);
+ * of_parse_phandle_with_args(node3, "list", "#list-cells", 1, &args);
  */
-int of_parse_phandles_with_args(struct device_node *np, const char *list_name,
+int of_parse_phandle_with_args(struct device_node *np, const char *list_name,
 				const char *cells_name, int index,
-				struct device_node **out_node,
-				const void **out_args)
+				struct of_phandle_args *out_args)
 {
-	int ret = -EINVAL;
-	const __be32 *list;
-	const __be32 *list_end;
-	int size;
-	int cur_index = 0;
+	const __be32 *list, *list_end;
+	int size, cur_index = 0;
+	uint32_t count = 0;
 	struct device_node *node = NULL;
-	const void *args = NULL;
+	phandle phandle;
 
+	/* Retrieve the phandle list property */
 	list = of_get_property(np, list_name, &size);
-	if (!list) {
-		ret = -ENOENT;
-		goto err0;
-	}
+	if (!list)
+		return -EINVAL;
 	list_end = list + size / sizeof(*list);
 
+	/* Loop over the phandles until all the requested entry is found */
 	while (list < list_end) {
-		const __be32 *cells;
-		phandle phandle;
+		count = 0;
 
+		/*
+		 * If phandle is 0, then it is an empty entry with no
+		 * arguments.  Skip forward to the next entry.
+		 */
 		phandle = be32_to_cpup(list++);
-		args = list;
-
-		/* one cell hole in the list = <>; */
-		if (!phandle)
-			goto next;
-
-		node = of_find_node_by_phandle(phandle);
-		if (!node) {
-			pr_debug("%s: could not find phandle\n",
-				 np->full_name);
-			goto err0;
-		}
+		if (phandle) {
+			/*
+			 * Find the provider node and parse the #*-cells
+			 * property to determine the argument length
+			 */
+			node = of_find_node_by_phandle(phandle);
+			if (!node) {
+				pr_err("%s: could not find phandle\n",
+					 np->full_name);
+				break;
+			}
+			if (of_property_read_u32(node, cells_name, &count)) {
+				pr_err("%s: could not get %s for %s\n",
+					 np->full_name, cells_name,
+					 node->full_name);
+				break;
+			}
 
-		cells = of_get_property(node, cells_name, &size);
-		if (!cells || size != sizeof(*cells)) {
-			pr_debug("%s: could not get %s for %s\n",
-				 np->full_name, cells_name, node->full_name);
-			goto err1;
+			/*
+			 * Make sure that the arguments actually fit in the
+			 * remaining property data length
+			 */
+			if (list + count > list_end) {
+				pr_err("%s: arguments longer than property\n",
+					 np->full_name);
+				break;
+			}
 		}
 
-		list += be32_to_cpup(cells);
-		if (list > list_end) {
-			pr_debug("%s: insufficient arguments length\n",
-				 np->full_name);
-			goto err1;
+		/*
+		 * All of the error cases above bail out of the loop, so at
+		 * this point, the parsing is successful. If the requested
+		 * index matches, then fill the out_args structure and return,
+		 * or return -ENOENT for an empty entry.
+		 */
+		if (cur_index == index) {
+			if (!phandle)
+				return -ENOENT;
+
+			if (out_args) {
+				int i;
+				if (WARN_ON(count > MAX_PHANDLE_ARGS))
+					count = MAX_PHANDLE_ARGS;
+				out_args->np = node;
+				out_args->args_count = count;
+				for (i = 0; i < count; i++)
+					out_args->args[i] = be32_to_cpup(list++);
+			}
+			return 0;
 		}
-next:
-		if (cur_index == index)
-			break;
 
 		of_node_put(node);
 		node = NULL;
-		args = NULL;
+		list += count;
 		cur_index++;
 	}
 
-	if (!node) {
-		/*
-		 * args w/o node indicates that the loop above has stopped at
-		 * the 'hole' cell. Report this differently.
-		 */
-		if (args)
-			ret = -EEXIST;
-		else
-			ret = -ENOENT;
-		goto err0;
-	}
-
-	if (out_node)
-		*out_node = node;
-	if (out_args)
-		*out_args = args;
-
-	return 0;
-err1:
-	of_node_put(node);
-err0:
-	pr_debug("%s failed with status %d\n", __func__, ret);
-	return ret;
+	/* Loop exited without finding a valid entry; return an error */
+	if (node)
+		of_node_put(node);
+	return -EINVAL;
 }
-EXPORT_SYMBOL(of_parse_phandles_with_args);
+EXPORT_SYMBOL(of_parse_phandle_with_args);
 
 /**
  * prom_add_property - Add a property to a node

drivers/of/gpio.c

@@ -35,32 +35,27 @@ int of_get_named_gpio_flags(struct device_node *np, const char *propname,
                            int index, enum of_gpio_flags *flags)
 {
 	int ret;
-	struct device_node *gpio_np;
 	struct gpio_chip *gc;
-	int size;
-	const void *gpio_spec;
-	const __be32 *gpio_cells;
+	struct of_phandle_args gpiospec;
 
-	ret = of_parse_phandles_with_args(np, propname, "#gpio-cells", index,
-					  &gpio_np, &gpio_spec);
+	ret = of_parse_phandle_with_args(np, propname, "#gpio-cells", index,
+					 &gpiospec);
 	if (ret) {
 		pr_debug("%s: can't parse gpios property\n", __func__);
 		goto err0;
 	}
 
-	gc = of_node_to_gpiochip(gpio_np);
+	gc = of_node_to_gpiochip(gpiospec.np);
 	if (!gc) {
 		pr_debug("%s: gpio controller %s isn't registered\n",
-			 np->full_name, gpio_np->full_name);
+			 np->full_name, gpiospec.np->full_name);
 		ret = -ENODEV;
 		goto err1;
 	}
 
-	gpio_cells = of_get_property(gpio_np, "#gpio-cells", &size);
-	if (!gpio_cells || size != sizeof(*gpio_cells) ||
-			be32_to_cpup(gpio_cells) != gc->of_gpio_n_cells) {
+	if (gpiospec.args_count != gc->of_gpio_n_cells) {
 		pr_debug("%s: wrong #gpio-cells for %s\n",
-			 np->full_name, gpio_np->full_name);
+			 np->full_name, gpiospec.np->full_name);
 		ret = -EINVAL;
 		goto err1;
 	}
@@ -69,13 +64,13 @@ int of_get_named_gpio_flags(struct device_node *np, const char *propname,
 	if (flags)
 		*flags = 0;
 
-	ret = gc->of_xlate(gc, np, gpio_spec, flags);
+	ret = gc->of_xlate(gc, &gpiospec, flags);
 	if (ret < 0)
 		goto err1;
 
 	ret += gc->base;
 err1:
-	of_node_put(gpio_np);
+	of_node_put(gpiospec.np);
 err0:
 	pr_debug("%s exited with status %d\n", __func__, ret);
 	return ret;
@@ -105,8 +100,8 @@ unsigned int of_gpio_count(struct device_node *np)
 	do {
 		int ret;
 
-		ret = of_parse_phandles_with_args(np, "gpios", "#gpio-cells",
-						  cnt, NULL, NULL);
+		ret = of_parse_phandle_with_args(np, "gpios", "#gpio-cells",
+						 cnt, NULL);
 		/* A hole in the gpios = <> counts anyway. */
 		if (ret < 0 && ret != -EEXIST)
 			break;
@@ -127,12 +122,9 @@ EXPORT_SYMBOL(of_gpio_count);
  * gpio chips. This function performs only one sanity check: whether gpio
  * is less than ngpios (that is specified in the gpio_chip).
  */
-int of_gpio_simple_xlate(struct gpio_chip *gc, struct device_node *np,
-			 const void *gpio_spec, u32 *flags)
+int of_gpio_simple_xlate(struct gpio_chip *gc,
+			 const struct of_phandle_args *gpiospec, u32 *flags)
 {
-	const __be32 *gpio = gpio_spec;
-	const u32 n = be32_to_cpup(gpio);
-
 	/*
 	 * We're discouraging gpio_cells < 2, since that way you'll have to
 	 * write your own xlate function (that will have to retrive the GPIO
@@ -144,13 +136,16 @@ int of_gpio_simple_xlate(struct gpio_chip *gc, struct device_node *np,
 		return -EINVAL;
 	}
 
-	if (n > gc->ngpio)
+	if (WARN_ON(gpiospec->args_count < gc->of_gpio_n_cells))
+		return -EINVAL;
+
+	if (gpiospec->args[0] > gc->ngpio)
 		return -EINVAL;
 
 	if (flags)
-		*flags = be32_to_cpu(gpio[1]);
+		*flags = gpiospec->args[1];
 
-	return n;
+	return gpiospec->args[0];
 }
 EXPORT_SYMBOL(of_gpio_simple_xlate);
 
@@ -198,8 +193,6 @@ int of_mm_gpiochip_add(struct device_node *np,
 	if (ret)
 		goto err2;
 
-	pr_debug("%s: registered as generic GPIO chip, base is %d\n",
-		 np->full_name, gc->base);
 	return 0;
 err2:
 	iounmap(mm_gc->regs);

drivers/of/selftest.c

@@ -0,0 +1,139 @@
+/*
+ * Self tests for device tree subsystem
+ */
+
+#define pr_fmt(fmt) "### %s(): " fmt, __func__
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <linux/device.h>
+
+static bool selftest_passed = true;
+#define selftest(result, fmt, ...) { \
+	selftest_passed &= (result); \
+	if (!(result)) \
+		pr_err("FAIL %s:%i " fmt, __FILE__, __LINE__, ##__VA_ARGS__); \
+}
+
+static void __init of_selftest_parse_phandle_with_args(void)
+{
+	struct device_node *np;
+	struct of_phandle_args args;
+	int rc, i;
+	bool passed_all = true;
+
+	pr_info("start\n");
+	np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
+	if (!np) {
+		pr_err("missing testcase data\n");
+		return;
+	}
+
+	for (i = 0; i < 7; i++) {
+		bool passed = true;
+		rc = of_parse_phandle_with_args(np, "phandle-list",
+						"#phandle-cells", i, &args);
+
+		/* Test the values from tests-phandle.dtsi */
+		switch (i) {
+		case 0:
+			passed &= !rc;
+			passed &= (args.args_count == 1);
+			passed &= (args.args[0] == (i + 1));
+			break;
+		case 1:
+			passed &= !rc;
+			passed &= (args.args_count == 2);
+			passed &= (args.args[0] == (i + 1));
+			passed &= (args.args[1] == 0);
+			break;
+		case 2:
+			passed &= (rc == -ENOENT);
+			break;
+		case 3:
+			passed &= !rc;
+			passed &= (args.args_count == 3);
+			passed &= (args.args[0] == (i + 1));
+			passed &= (args.args[1] == 4);
+			passed &= (args.args[2] == 3);
+			break;
+		case 4:
+			passed &= !rc;
+			passed &= (args.args_count == 2);
+			passed &= (args.args[0] == (i + 1));
+			passed &= (args.args[1] == 100);
+			break;
+		case 5:
+			passed &= !rc;
+			passed &= (args.args_count == 0);
+			break;
+		case 6:
+			passed &= !rc;
+			passed &= (args.args_count == 1);
+			passed &= (args.args[0] == (i + 1));
+			break;
+		case 7:
+			passed &= (rc == -EINVAL);
+			break;
+		default:
+			passed = false;
+		}
+
+		if (!passed) {
+			int j;
+			pr_err("index %i - data error on node %s rc=%i regs=[",
+				i, args.np->full_name, rc);
+			for (j = 0; j < args.args_count; j++)
+				printk(" %i", args.args[j]);
+			printk(" ]\n");
+
+			passed_all = false;
+		}
+	}
+
+	/* Check for missing list property */
+	rc = of_parse_phandle_with_args(np, "phandle-list-missing",
+					"#phandle-cells", 0, &args);
+	passed_all &= (rc == -EINVAL);
+
+	/* Check for missing cells property */
+	rc = of_parse_phandle_with_args(np, "phandle-list",
+					"#phandle-cells-missing", 0, &args);
+	passed_all &= (rc == -EINVAL);
+
+	/* Check for bad phandle in list */
+	rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
+					"#phandle-cells", 0, &args);
+	passed_all &= (rc == -EINVAL);
+
+	/* Check for incorrectly formed argument list */
+	rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
+					"#phandle-cells", 1, &args);
+	passed_all &= (rc == -EINVAL);
+
+	pr_info("end - %s\n", passed_all ? "PASS" : "FAIL");
+}
+
+static int __init of_selftest(void)
+{
+	struct device_node *np;
+
+	np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
+	if (!np) {
+		pr_info("No testcase data in device tree; not running tests\n");
+		return 0;
+	}
+	of_node_put(np);
+
+	pr_info("start of selftest - you will see error messages\n");
+	of_selftest_parse_phandle_with_args();
+	pr_info("end of selftest - %s\n", selftest_passed ? "PASS" : "FAIL");
+	return 0;
+}
+late_initcall(of_selftest);

drivers/spi/spi-pl022.c

@@ -340,6 +340,10 @@ struct vendor_data {
  * @cur_msg: Pointer to current spi_message being processed
  * @cur_transfer: Pointer to current spi_transfer
  * @cur_chip: pointer to current clients chip(assigned from controller_state)
+ * @next_msg_cs_active: the next message in the queue has been examined
+ *  and it was found that it uses the same chip select as the previous
+ *  message, so we left it active after the previous transfer, and it's
+ *  active already.
  * @tx: current position in TX buffer to be read
  * @tx_end: end position in TX buffer to be read
  * @rx: current position in RX buffer to be written
@@ -373,6 +377,7 @@ struct pl022 {
 	struct spi_message		*cur_msg;
 	struct spi_transfer		*cur_transfer;
 	struct chip_data		*cur_chip;
+	bool				next_msg_cs_active;
 	void				*tx;
 	void				*tx_end;
 	void				*rx;
@@ -445,23 +450,9 @@ static void giveback(struct pl022 *pl022)
 	struct spi_transfer *last_transfer;
 	unsigned long flags;
 	struct spi_message *msg;
-	void (*curr_cs_control) (u32 command);
+	pl022->next_msg_cs_active = false;
 
-	/*
-	 * This local reference to the chip select function
-	 * is needed because we set curr_chip to NULL
-	 * as a step toward termininating the message.
-	 */
-	curr_cs_control = pl022->cur_chip->cs_control;
-	spin_lock_irqsave(&pl022->queue_lock, flags);
-	msg = pl022->cur_msg;
-	pl022->cur_msg = NULL;
-	pl022->cur_transfer = NULL;
-	pl022->cur_chip = NULL;
-	queue_work(pl022->workqueue, &pl022->pump_messages);
-	spin_unlock_irqrestore(&pl022->queue_lock, flags);
-
-	last_transfer = list_entry(msg->transfers.prev,
+	last_transfer = list_entry(pl022->cur_msg->transfers.prev,
 					struct spi_transfer,
 					transfer_list);
 
@@ -473,18 +464,13 @@ static void giveback(struct pl022 *pl022)
 		 */
 		udelay(last_transfer->delay_usecs);
 
-	/*
-	 * Drop chip select UNLESS cs_change is true or we are returning
-	 * a message with an error, or next message is for another chip
-	 */
-	if (!last_transfer->cs_change)
-		curr_cs_control(SSP_CHIP_DESELECT);
-	else {
+	if (!last_transfer->cs_change) {
 		struct spi_message *next_msg;
 
-		/* Holding of cs was hinted, but we need to make sure
-		 * the next message is for the same chip.  Don't waste
-		 * time with the following tests unless this was hinted.
+		/*
+		 * cs_change was not set. We can keep the chip select
+		 * enabled if there is message in the queue and it is
+		 * for the same spi device.
 		 *
 		 * We cannot postpone this until pump_messages, because
 		 * after calling msg->complete (below) the driver that
@@ -501,19 +487,29 @@ static void giveback(struct pl022 *pl022)
 					struct spi_message, queue);
 		spin_unlock_irqrestore(&pl022->queue_lock, flags);
 
-		/* see if the next and current messages point
-		 * to the same chip
+		/*
+		 * see if the next and current messages point
+		 * to the same spi device.
 		 */
-		if (next_msg && next_msg->spi != msg->spi)
+		if (next_msg && next_msg->spi != pl022->cur_msg->spi)
 			next_msg = NULL;
-		if (!next_msg || msg->state == STATE_ERROR)
-			curr_cs_control(SSP_CHIP_DESELECT);
+		if (!next_msg || pl022->cur_msg->state == STATE_ERROR)
+			pl022->cur_chip->cs_control(SSP_CHIP_DESELECT);
+		else
+			pl022->next_msg_cs_active = true;
 	}
+
+	spin_lock_irqsave(&pl022->queue_lock, flags);
+	msg = pl022->cur_msg;
+	pl022->cur_msg = NULL;
+	pl022->cur_transfer = NULL;
+	pl022->cur_chip = NULL;
+	queue_work(pl022->workqueue, &pl022->pump_messages);
+	spin_unlock_irqrestore(&pl022->queue_lock, flags);
+
 	msg->state = NULL;
 	if (msg->complete)
 		msg->complete(msg->context);
-	/* This message is completed, so let's turn off the clocks & power */
-	pm_runtime_put(&pl022->adev->dev);
 }
 
 /**
@@ -1244,9 +1240,9 @@ static irqreturn_t pl022_interrupt_handler(int irq, void *dev_id)
 
 	if ((pl022->tx == pl022->tx_end) && (flag == 0)) {
 		flag = 1;
-		/* Disable Transmit interrupt */
-		writew(readw(SSP_IMSC(pl022->virtbase)) &
-		       (~SSP_IMSC_MASK_TXIM),
+		/* Disable Transmit interrupt, enable receive interrupt */
+		writew((readw(SSP_IMSC(pl022->virtbase)) &
+		       ~SSP_IMSC_MASK_TXIM) | SSP_IMSC_MASK_RXIM,
 		       SSP_IMSC(pl022->virtbase));
 	}
 
@@ -1352,7 +1348,7 @@ static void pump_transfers(unsigned long data)
 			 */
 			udelay(previous->delay_usecs);
 
-		/* Drop chip select only if cs_change is requested */
+		/* Reselect chip select only if cs_change was requested */
 		if (previous->cs_change)
 			pl022->cur_chip->cs_control(SSP_CHIP_SELECT);
 	} else {
@@ -1379,15 +1375,22 @@ static void pump_transfers(unsigned long data)
 	}
 
 err_config_dma:
-	writew(ENABLE_ALL_INTERRUPTS, SSP_IMSC(pl022->virtbase));
+	/* enable all interrupts except RX */
+	writew(ENABLE_ALL_INTERRUPTS & ~SSP_IMSC_MASK_RXIM, SSP_IMSC(pl022->virtbase));
 }
 
 static void do_interrupt_dma_transfer(struct pl022 *pl022)
 {
-	u32 irqflags = ENABLE_ALL_INTERRUPTS;
+	/*
+	 * Default is to enable all interrupts except RX -
+	 * this will be enabled once TX is complete
+	 */
+	u32 irqflags = ENABLE_ALL_INTERRUPTS & ~SSP_IMSC_MASK_RXIM;
+
+	/* Enable target chip, if not already active */
+	if (!pl022->next_msg_cs_active)
+		pl022->cur_chip->cs_control(SSP_CHIP_SELECT);
 
-	/* Enable target chip */
-	pl022->cur_chip->cs_control(SSP_CHIP_SELECT);
 	if (set_up_next_transfer(pl022, pl022->cur_transfer)) {
 		/* Error path */
 		pl022->cur_msg->state = STATE_ERROR;
@@ -1442,7 +1445,8 @@ static void do_polling_transfer(struct pl022 *pl022)
 		} else {
 			/* STATE_START */
 			message->state = STATE_RUNNING;
-			pl022->cur_chip->cs_control(SSP_CHIP_SELECT);
+			if (!pl022->next_msg_cs_active)
+				pl022->cur_chip->cs_control(SSP_CHIP_SELECT);
 		}
 
 		/* Configuration Changing Per Transfer */
@@ -1504,14 +1508,28 @@ static void pump_messages(struct work_struct *work)
 	struct pl022 *pl022 =
 		container_of(work, struct pl022, pump_messages);
 	unsigned long flags;
+	bool was_busy = false;
 
 	/* Lock queue and check for queue work */
 	spin_lock_irqsave(&pl022->queue_lock, flags);
 	if (list_empty(&pl022->queue) || !pl022->running) {
+		if (pl022->busy) {
+			/* nothing more to do - disable spi/ssp and power off */
+			writew((readw(SSP_CR1(pl022->virtbase)) &
+				(~SSP_CR1_MASK_SSE)), SSP_CR1(pl022->virtbase));
+
+			if (pl022->master_info->autosuspend_delay > 0) {
+				pm_runtime_mark_last_busy(&pl022->adev->dev);
+				pm_runtime_put_autosuspend(&pl022->adev->dev);
+			} else {
+				pm_runtime_put(&pl022->adev->dev);
+			}
+		}
 		pl022->busy = false;
 		spin_unlock_irqrestore(&pl022->queue_lock, flags);
 		return;
 	}
+
 	/* Make sure we are not already running a message */
 	if (pl022->cur_msg) {
 		spin_unlock_irqrestore(&pl022->queue_lock, flags);
@@ -1522,7 +1540,10 @@ static void pump_messages(struct work_struct *work)
 	    list_entry(pl022->queue.next, struct spi_message, queue);
 
 	list_del_init(&pl022->cur_msg->queue);
-	pl022->busy = true;
+	if (pl022->busy)
+		was_busy = true;
+	else
+		pl022->busy = true;
 	spin_unlock_irqrestore(&pl022->queue_lock, flags);
 
 	/* Initial message state */
@@ -1532,12 +1553,14 @@ static void pump_messages(struct work_struct *work)
 
 	/* Setup the SPI using the per chip configuration */
 	pl022->cur_chip = spi_get_ctldata(pl022->cur_msg->spi);
-	/*
-	 * We enable the core voltage and clocks here, then the clocks
-	 * and core will be disabled when giveback() is called in each method
-	 * (poll/interrupt/DMA)
-	 */
-	pm_runtime_get_sync(&pl022->adev->dev);
+	if (!was_busy)
+		/*
+		 * We enable the core voltage and clocks here, then the clocks
+		 * and core will be disabled when this workqueue is run again
+		 * and there is no more work to be done.
+		 */
+		pm_runtime_get_sync(&pl022->adev->dev);
+
 	restore_state(pl022);
 	flush(pl022);
 
@@ -1582,6 +1605,7 @@ static int start_queue(struct pl022 *pl022)
 	pl022->cur_msg = NULL;
 	pl022->cur_transfer = NULL;
 	pl022->cur_chip = NULL;
+	pl022->next_msg_cs_active = false;
 	spin_unlock_irqrestore(&pl022->queue_lock, flags);
 
 	queue_work(pl022->workqueue, &pl022->pump_messages);
@@ -1881,7 +1905,7 @@ static int pl022_setup(struct spi_device *spi)
 {
 	struct pl022_config_chip const *chip_info;
 	struct chip_data *chip;
-	struct ssp_clock_params clk_freq = {0, };
+	struct ssp_clock_params clk_freq = { .cpsdvsr = 0, .scr = 0};
 	int status = 0;
 	struct pl022 *pl022 = spi_master_get_devdata(spi->master);
 	unsigned int bits = spi->bits_per_word;
@@ -2231,7 +2255,17 @@ pl022_probe(struct amba_device *adev, const struct amba_id *id)
 	dev_dbg(dev, "probe succeeded\n");
 
 	/* let runtime pm put suspend */
-	pm_runtime_put(dev);
+	if (platform_info->autosuspend_delay > 0) {
+		dev_info(&adev->dev,
+			"will use autosuspend for runtime pm, delay %dms\n",
+			platform_info->autosuspend_delay);
+		pm_runtime_set_autosuspend_delay(dev,
+			platform_info->autosuspend_delay);
+		pm_runtime_use_autosuspend(dev);
+		pm_runtime_put_autosuspend(dev);
+	} else {
+		pm_runtime_put(dev);
+	}
 	return 0;
 
  err_spi_register:
@@ -2305,11 +2339,6 @@ static int pl022_suspend(struct device *dev)
 		return status;
 	}
 
-	amba_vcore_enable(pl022->adev);
-	amba_pclk_enable(pl022->adev);
-	load_ssp_default_config(pl022);
-	amba_pclk_disable(pl022->adev);
-	amba_vcore_disable(pl022->adev);
 	dev_dbg(dev, "suspended\n");
 	return 0;
 }

include/asm-generic/gpio.h

@@ -4,6 +4,7 @@
 #include <linux/kernel.h>
 #include <linux/types.h>
 #include <linux/errno.h>
+#include <linux/of.h>
 
 #ifdef CONFIG_GPIOLIB
 
@@ -128,13 +129,14 @@ struct gpio_chip {
 	 */
 	struct device_node *of_node;
 	int of_gpio_n_cells;
-	int (*of_xlate)(struct gpio_chip *gc, struct device_node *np,
-		        const void *gpio_spec, u32 *flags);
+	int (*of_xlate)(struct gpio_chip *gc,
+		        const struct of_phandle_args *gpiospec, u32 *flags);
 #endif
 };
 
 extern const char *gpiochip_is_requested(struct gpio_chip *chip,
 			unsigned offset);
+extern struct gpio_chip *gpio_to_chip(unsigned gpio);
 extern int __must_check gpiochip_reserve(int start, int ngpio);
 
 /* add/remove chips */

include/linux/amba/pl022.h

@@ -238,6 +238,9 @@ struct dma_chan;
  * @enable_dma: if true enables DMA driven transfers.
  * @dma_rx_param: parameter to locate an RX DMA channel.
  * @dma_tx_param: parameter to locate a TX DMA channel.
+ * @autosuspend_delay: delay in ms following transfer completion before the
+ *     runtime power management system suspends the device. A setting of 0
+ *     indicates no delay and the device will be suspended immediately.
  */
 struct pl022_ssp_controller {
 	u16 bus_id;
@@ -246,6 +249,7 @@ struct pl022_ssp_controller {
 	bool (*dma_filter)(struct dma_chan *chan, void *filter_param);
 	void *dma_rx_param;
 	void *dma_tx_param;
+	int autosuspend_delay;
 };
 
 /**

include/linux/of.h

@@ -65,6 +65,13 @@ struct device_node {
 #endif
 };
 
+#define MAX_PHANDLE_ARGS 8
+struct of_phandle_args {
+	struct device_node *np;
+	int args_count;
+	uint32_t args[MAX_PHANDLE_ARGS];
+};
+
 #ifdef CONFIG_OF
 
 /* Pointer for first entry in chain of all nodes. */
@@ -230,9 +237,9 @@ extern int of_modalias_node(struct device_node *node, char *modalias, int len);
 extern struct device_node *of_parse_phandle(struct device_node *np,
 					    const char *phandle_name,
 					    int index);
-extern int of_parse_phandles_with_args(struct device_node *np,
+extern int of_parse_phandle_with_args(struct device_node *np,
 	const char *list_name, const char *cells_name, int index,
-	struct device_node **out_node, const void **out_args);
+	struct of_phandle_args *out_args);
 
 extern void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align));
 extern int of_alias_get_id(struct device_node *np, const char *stem);

include/linux/of_gpio.h

@@ -18,6 +18,7 @@
 #include <linux/kernel.h>
 #include <linux/errno.h>
 #include <linux/gpio.h>
+#include <linux/of.h>
 
 struct device_node;
 
@@ -57,8 +58,9 @@ extern int of_mm_gpiochip_add(struct device_node *np,
 extern void of_gpiochip_add(struct gpio_chip *gc);
 extern void of_gpiochip_remove(struct gpio_chip *gc);
 extern struct gpio_chip *of_node_to_gpiochip(struct device_node *np);
-extern int of_gpio_simple_xlate(struct gpio_chip *gc, struct device_node *np,
-				const void *gpio_spec, u32 *flags);
+extern int of_gpio_simple_xlate(struct gpio_chip *gc,
+				const struct of_phandle_args *gpiospec,
+				u32 *flags);
 
 #else /* CONFIG_OF_GPIO */
 
@@ -75,8 +77,8 @@ static inline unsigned int of_gpio_count(struct device_node *np)
 }
 
 static inline int of_gpio_simple_xlate(struct gpio_chip *gc,
-				       struct device_node *np,
-				       const void *gpio_spec, u32 *flags)
+				       const struct of_phandle_args *gpiospec,
+				       u32 *flags)
 {
 	return -ENOSYS;
 }