Merge tag 'reset-for-4.16' of git://git.pengutronix.de/git/pza/linux into next/drivers

Pull "Reset controller changes for v4.16" from Philipp Zabel:

This adds Meson-AXG reset support and fixes a few issues with the reset
include header: device_reset_optional is fixed to be really optional,
unused headers are pruned, and useless warnings and deprecated API calls
are removed.

* tag 'reset-for-4.16' of git://git.pengutronix.de/git/pza/linux:
  reset: meson-axg: add compatible string for Meson-AXG SoC
  dt-bindings: reset: Add bindings for the Meson-AXG SoC Reset Controller
  reset: remove reset_control_get(_optional)
  reset: minimize the number of headers included from <linux/reset.h>
  reset: remove remaining WARN_ON() in <linux/reset.h>
  reset: make device_reset_optional() really optional

Documentation/devicetree/bindings/reset/amlogic,meson-reset.txt

@@ -5,7 +5,8 @@ Please also refer to reset.txt in this directory for common reset
 controller binding usage.
 
 Required properties:
-- compatible: Should be "amlogic,meson8b-reset" or "amlogic,meson-gxbb-reset"
+- compatible: Should be "amlogic,meson8b-reset", "amlogic,meson-gxbb-reset" or
+	"amlogic,meson-axg-reset".
 - reg: should contain the register address base
 - #reset-cells: 1, see below
 

drivers/reset/core.c

@@ -566,17 +566,18 @@ EXPORT_SYMBOL_GPL(__devm_reset_control_get);
  * device_reset - find reset controller associated with the device
  *                and perform reset
  * @dev: device to be reset by the controller
+ * @optional: whether it is optional to reset the device
  *
- * Convenience wrapper for reset_control_get() and reset_control_reset().
+ * Convenience wrapper for __reset_control_get() and reset_control_reset().
  * This is useful for the common case of devices with single, dedicated reset
  * lines.
  */
-int device_reset(struct device *dev)
+int __device_reset(struct device *dev, bool optional)
 {
 	struct reset_control *rstc;
 	int ret;
 
-	rstc = reset_control_get(dev, NULL);
+	rstc = __reset_control_get(dev, NULL, 0, 0, optional);
 	if (IS_ERR(rstc))
 		return PTR_ERR(rstc);
 
@@ -586,7 +587,7 @@ int device_reset(struct device *dev)
 
 	return ret;
 }
-EXPORT_SYMBOL_GPL(device_reset);
+EXPORT_SYMBOL_GPL(__device_reset);
 
 /**
  * APIs to manage an array of reset controls.

drivers/reset/reset-meson.c

@@ -139,6 +139,8 @@ static const struct of_device_id meson_reset_dt_ids[] = {
 	   .data = &meson_reset_meson8_ops, },
 	 { .compatible = "amlogic,meson-gxbb-reset",
 	   .data = &meson_reset_gx_ops, },
+	 { .compatible = "amlogic,meson-axg-reset",
+	   .data = &meson_reset_gx_ops, },
 	 { /* sentinel */ },
 };
 

include/dt-bindings/reset/amlogic,meson-axg-reset.h

+/*
+ *
+ * Copyright (c) 2016 BayLibre, SAS.
+ * Author: Neil Armstrong <narmstrong@baylibre.com>
+ *
+ * Copyright (c) 2017 Amlogic, inc.
+ * Author: Yixun Lan <yixun.lan@amlogic.com>
+ *
+ * SPDX-License-Identifier: (GPL-2.0+ OR BSD)
+ */
+
+#ifndef _DT_BINDINGS_AMLOGIC_MESON_AXG_RESET_H
+#define _DT_BINDINGS_AMLOGIC_MESON_AXG_RESET_H
+
+/*	RESET0					*/
+#define RESET_HIU			0
+#define RESET_PCIE_A			1
+#define RESET_PCIE_B			2
+#define RESET_DDR_TOP			3
+/*					4	*/
+#define RESET_VIU			5
+#define RESET_PCIE_PHY			6
+#define RESET_PCIE_APB			7
+/*					8	*/
+/*					9	*/
+#define RESET_VENC			10
+#define RESET_ASSIST			11
+/*					12	*/
+#define RESET_VCBUS			13
+/*					14	*/
+/*					15	*/
+#define RESET_GIC			16
+#define RESET_CAPB3_DECODE		17
+/*					18-21	*/
+#define RESET_SYS_CPU_CAPB3		22
+#define RESET_CBUS_CAPB3		23
+#define RESET_AHB_CNTL			24
+#define RESET_AHB_DATA			25
+#define RESET_VCBUS_CLK81		26
+#define RESET_MMC			27
+/*					28-31	*/
+/*	RESET1					*/
+/*					32	*/
+/*					33	*/
+#define RESET_USB_OTG			34
+#define RESET_DDR			35
+#define RESET_AO_RESET			36
+/*					37	*/
+#define RESET_AHB_SRAM			38
+/*					39	*/
+/*					40	*/
+#define RESET_DMA			41
+#define RESET_ISA			42
+#define RESET_ETHERNET			43
+/*					44	*/
+#define RESET_SD_EMMC_B			45
+#define RESET_SD_EMMC_C			46
+#define RESET_ROM_BOOT			47
+#define RESET_SYS_CPU_0			48
+#define RESET_SYS_CPU_1			49
+#define RESET_SYS_CPU_2			50
+#define RESET_SYS_CPU_3			51
+#define RESET_SYS_CPU_CORE_0		52
+#define RESET_SYS_CPU_CORE_1		53
+#define RESET_SYS_CPU_CORE_2		54
+#define RESET_SYS_CPU_CORE_3		55
+#define RESET_SYS_PLL_DIV		56
+#define RESET_SYS_CPU_AXI		57
+#define RESET_SYS_CPU_L2		58
+#define RESET_SYS_CPU_P			59
+#define RESET_SYS_CPU_MBIST		60
+/*					61-63	*/
+/*	RESET2					*/
+/*					64	*/
+/*					65	*/
+#define RESET_AUDIO			66
+/*					67	*/
+#define RESET_MIPI_HOST			68
+#define RESET_AUDIO_LOCKER		69
+#define RESET_GE2D			70
+/*					71-76	*/
+#define RESET_AO_CPU_RESET		77
+/*					78-95	*/
+/*	RESET3					*/
+#define RESET_RING_OSCILLATOR		96
+/*					97-127	*/
+/*	RESET4					*/
+/*					128	*/
+/*					129	*/
+#define RESET_MIPI_PHY			130
+/*					131-140	*/
+#define RESET_VENCL			141
+#define RESET_I2C_MASTER_2		142
+#define RESET_I2C_MASTER_1		143
+/*					144-159	*/
+/*	RESET5					*/
+/*					160-191	*/
+/*	RESET6					*/
+#define RESET_PERIPHS_GENERAL		192
+#define RESET_PERIPHS_SPICC		193
+/*					194	*/
+/*					195	*/
+#define RESET_PERIPHS_I2C_MASTER_0	196
+/*					197-200	*/
+#define RESET_PERIPHS_UART_0		201
+#define RESET_PERIPHS_UART_1		202
+/*					203-204	*/
+#define RESET_PERIPHS_SPI_0		205
+#define RESET_PERIPHS_I2C_MASTER_3	206
+/*					207-223	*/
+/*	RESET7					*/
+#define RESET_USB_DDR_0			224
+#define RESET_USB_DDR_1			225
+#define RESET_USB_DDR_2			226
+#define RESET_USB_DDR_3			227
+/*					228	*/
+#define RESET_DEVICE_MMC_ARB		229
+/*					230	*/
+#define RESET_VID_LOCK			231
+#define RESET_A9_DMC_PIPEL		232
+#define RESET_DMC_VPU_PIPEL		233
+/*					234-255	*/
+
+#endif

include/linux/reset.h

@@ -2,8 +2,10 @@
 #ifndef _LINUX_RESET_H_
 #define _LINUX_RESET_H_
 
-#include <linux/device.h>
+#include <linux/types.h>
 
+struct device;
+struct device_node;
 struct reset_control;
 
 #ifdef CONFIG_RESET_CONTROLLER
@@ -20,22 +22,16 @@ struct reset_control *__reset_control_get(struct device *dev, const char *id,
 					  int index, bool shared,
 					  bool optional);
 void reset_control_put(struct reset_control *rstc);
+int __device_reset(struct device *dev, bool optional);
 struct reset_control *__devm_reset_control_get(struct device *dev,
 				     const char *id, int index, bool shared,
 				     bool optional);
 
-int __must_check device_reset(struct device *dev);
-
 struct reset_control *devm_reset_control_array_get(struct device *dev,
 						   bool shared, bool optional);
 struct reset_control *of_reset_control_array_get(struct device_node *np,
 						 bool shared, bool optional);
 
-static inline int device_reset_optional(struct device *dev)
-{
-	return device_reset(dev);
-}
-
 #else
 
 static inline int reset_control_reset(struct reset_control *rstc)
@@ -62,15 +58,9 @@ static inline void reset_control_put(struct reset_control *rstc)
 {
 }
 
-static inline int __must_check device_reset(struct device *dev)
-{
-	WARN_ON(1);
-	return -ENOTSUPP;
-}
-
-static inline int device_reset_optional(struct device *dev)
+static inline int __device_reset(struct device *dev, bool optional)
 {
-	return -ENOTSUPP;
+	return optional ? 0 : -ENOTSUPP;
 }
 
 static inline struct reset_control *__of_reset_control_get(
@@ -109,6 +99,16 @@ of_reset_control_array_get(struct device_node *np, bool shared, bool optional)
 
 #endif /* CONFIG_RESET_CONTROLLER */
 
+static inline int __must_check device_reset(struct device *dev)
+{
+	return __device_reset(dev, false);
+}
+
+static inline int device_reset_optional(struct device *dev)
+{
+	return __device_reset(dev, true);
+}
+
 /**
  * reset_control_get_exclusive - Lookup and obtain an exclusive reference
  *                               to a reset controller.
@@ -127,9 +127,6 @@ of_reset_control_array_get(struct device_node *np, bool shared, bool optional)
 static inline struct reset_control *
 __must_check reset_control_get_exclusive(struct device *dev, const char *id)
 {
-#ifndef CONFIG_RESET_CONTROLLER
-	WARN_ON(1);
-#endif
 	return __reset_control_get(dev, id, 0, false, false);
 }
 
@@ -275,9 +272,6 @@ static inline struct reset_control *
 __must_check devm_reset_control_get_exclusive(struct device *dev,
 					      const char *id)
 {
-#ifndef CONFIG_RESET_CONTROLLER
-	WARN_ON(1);
-#endif
 	return __devm_reset_control_get(dev, id, 0, false, false);
 }
 
@@ -350,18 +344,6 @@ devm_reset_control_get_shared_by_index(struct device *dev, int index)
  * These inline function calls will be removed once all consumers
  * have been moved over to the new explicit API.
  */
-static inline struct reset_control *reset_control_get(
-				struct device *dev, const char *id)
-{
-	return reset_control_get_exclusive(dev, id);
-}
-
-static inline struct reset_control *reset_control_get_optional(
-					struct device *dev, const char *id)
-{
-	return reset_control_get_optional_exclusive(dev, id);
-}
-
 static inline struct reset_control *of_reset_control_get(
 				struct device_node *node, const char *id)
 {