[PATCH 0/4] Add SOCFPGA System Manager

[PATCH 0/4] Add SOCFPGA System Manager

[thor.thayer]

From: Thor Thayer <thor.thayer@linux.intel.com>

Add MFD driver for ARM64 SOCFPGA System Manager to steer
System Manager calls appropriately.
The SOCFPGA System Manager includes registers from several
SOC peripherals.

On ARM32, syscon handles this aggregated register grouping.
Redirect System Manager calls to syscon for ARM32 SOCFPGA
systems.

The ARM64 System Manager can only be accessed from priority
level EL3 so this new MFD driver handles the calls to EL3.

Thor Thayer (4):
  mfd: altera-sysmgr: Add SOCFPGA System Manager abstraction
  ARM: socfpga_defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR
  arm64: defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR
  net: stmmac: socfpga: Convert to shared System Manager driver

 MAINTAINERS                                        |   6 +
 arch/arm/configs/socfpga_defconfig                 |   1 +
 arch/arm64/configs/defconfig                       |   1 +
 drivers/mfd/Kconfig                                |   9 +
 drivers/mfd/Makefile                               |   1 +
 drivers/mfd/altera-sysmgr.c                        | 310 +++++++++++++++++++++
 .../net/ethernet/stmicro/stmmac/dwmac-socfpga.c    |   4 +-
 include/linux/mfd/altera-sysmgr.h                  | 113 ++++++++
 8 files changed, 444 insertions(+), 1 deletion(-)
 create mode 100644 drivers/mfd/altera-sysmgr.c
 create mode 100644 include/linux/mfd/altera-sysmgr.h

-- 
2.7.4

[PATCH 0/4] Add SOCFPGA System Manager

[thor.thayer at linux.intel.com]

From: Thor Thayer <thor.thayer@linux.intel.com>

Add MFD driver for ARM64 SOCFPGA System Manager to steer
System Manager calls appropriately.
The SOCFPGA System Manager includes registers from several
SOC peripherals.

On ARM32, syscon handles this aggregated register grouping.
Redirect System Manager calls to syscon for ARM32 SOCFPGA
systems.

The ARM64 System Manager can only be accessed from priority
level EL3 so this new MFD driver handles the calls to EL3.

Thor Thayer (4):
  mfd: altera-sysmgr: Add SOCFPGA System Manager abstraction
  ARM: socfpga_defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR
  arm64: defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR
  net: stmmac: socfpga: Convert to shared System Manager driver

 MAINTAINERS                                        |   6 +
 arch/arm/configs/socfpga_defconfig                 |   1 +
 arch/arm64/configs/defconfig                       |   1 +
 drivers/mfd/Kconfig                                |   9 +
 drivers/mfd/Makefile                               |   1 +
 drivers/mfd/altera-sysmgr.c                        | 310 +++++++++++++++++++++
 .../net/ethernet/stmicro/stmmac/dwmac-socfpga.c    |   4 +-
 include/linux/mfd/altera-sysmgr.h                  | 113 ++++++++
 8 files changed, 444 insertions(+), 1 deletion(-)
 create mode 100644 drivers/mfd/altera-sysmgr.c
 create mode 100644 include/linux/mfd/altera-sysmgr.h

-- 
2.7.4

[PATCH 1/4] mfd: altera-sysmgr: Add SOCFPGA System Manager

[thor.thayer]

From: Thor Thayer <thor.thayer@linux.intel.com>

The SOCFPGA System Manager register block aggregates different
peripheral functions into one area.
On 32 bit ARM parts, the syscon driver is used for accesses.
On 64 bit ARM parts, the System Manager can only be accessed by
EL3 secure mode. Since a SMC call to EL3 is required, this new
driver uses regmaps similar to syscon to handle the SMC call.

Since regmaps abstract out the underlying register access, the
changes to drivers accessing the System Manager are minimal.

Signed-off-by: Thor Thayer <thor.thayer@linux.intel.com>
---
 MAINTAINERS                       |   6 +
 drivers/mfd/Kconfig               |   9 ++
 drivers/mfd/Makefile              |   1 +
 drivers/mfd/altera-sysmgr.c       | 310 ++++++++++++++++++++++++++++++++++++++
 include/linux/mfd/altera-sysmgr.h | 113 ++++++++++++++
 5 files changed, 439 insertions(+)
 create mode 100644 drivers/mfd/altera-sysmgr.c
 create mode 100644 include/linux/mfd/altera-sysmgr.h

diff --git a/MAINTAINERS b/MAINTAINERS
index d9e6d86488df..bda6b2173cc6 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -692,6 +692,12 @@ L:	linux-gpio@vger.kernel.org
 S:	Maintained
 F:	drivers/gpio/gpio-altera.c
 
+ALTERA SYSTEM MANAGER DRIVER
+M:	Thor Thayer <thor.thayer@linux.intel.com>
+S:	Maintained
+F:	drivers/mfd/altera-sysmgr.c
+F:	include/linux/mfd/altera-sysgmr.h
+
 ALTERA SYSTEM RESOURCE DRIVER FOR ARRIA10 DEVKIT
 M:	Thor Thayer <thor.thayer@linux.intel.com>
 S:	Maintained
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index f3a5f8d02790..1192a25186c7 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -29,6 +29,15 @@ config MFD_ALTERA_A10SR
 	  accessing the external gpio extender (LEDs & buttons) and
 	  power supply alarms (hwmon).
 
+config MFD_ALTERA_SYSMGR
+	bool "Altera SOCFPGA System Manager"
+	depends on (ARCH_SOCFPGA || ARCH_STRATIX10) && OF
+	select MFD_SYSCON
+	help
+	  Select this to get System Manager support for all Altera branded
+	  SOCFPGAs. The SOCFPGA System Manager handles all SOCFPGAs by
+	  using syscon for ARM32 parts and SMC calls to EL3 for ARM64 parts.
+
 config MFD_ACT8945A
 	tristate "Active-semi ACT8945A"
 	select MFD_CORE
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 5856a9489cbd..bc1508e3ff7b 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -232,6 +232,7 @@ obj-$(CONFIG_INTEL_SOC_PMIC_CHTDC_TI)	+= intel_soc_pmic_chtdc_ti.o
 obj-$(CONFIG_MFD_MT6397)	+= mt6397-core.o
 
 obj-$(CONFIG_MFD_ALTERA_A10SR)	+= altera-a10sr.o
+obj-$(CONFIG_MFD_ALTERA_SYSMGR) += altera-sysmgr.o
 obj-$(CONFIG_MFD_SUN4I_GPADC)	+= sun4i-gpadc.o
 
 obj-$(CONFIG_MFD_STM32_LPTIMER)	+= stm32-lptimer.o
diff --git a/drivers/mfd/altera-sysmgr.c b/drivers/mfd/altera-sysmgr.c
new file mode 100644
index 000000000000..29b0bfcb3f69
--- /dev/null
+++ b/drivers/mfd/altera-sysmgr.c
@@ -0,0 +1,310 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *  Copyright (C) 2017-2018, Intel Corporation.
+ *  Copyright (C) 2012 Freescale Semiconductor, Inc.
+ *  Copyright (C) 2012 Linaro Ltd.
+ *
+ *  Based on syscon driver.
+ */
+
+#include <linux/arm-smccc.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/mfd/altera-sysmgr.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+static struct platform_driver sysmgr_driver;
+
+/**
+ * struct altr_sysmgr - Altera SOCFPGA System Manager
+ * @regmap: the regmap used for System Manager accesses.
+ * @base  : the base address for the System Manager
+ */
+struct altr_sysmgr {
+	struct regmap *regmap;
+	void __iomem  *base;
+};
+
+/**
+ * Only 1 instance of System Manager is needed but many
+ * consumers will want to access it with the matching
+ * functions below.
+ */
+static struct altr_sysmgr *p_sysmgr;
+
+/**
+ * s10_protected_reg_write
+ * Write to a protected SMC register.
+ * @base: Base address of System Manager
+ * @reg:  Address offset of register
+ * @val:  Value to write
+ * Return: INTEL_SIP_SMC_STATUS_OK (0) on success
+ *	   INTEL_SIP_SMC_REG_ERROR on error
+ *	   INTEL_SIP_SMC_RETURN_UNKNOWN_FUNCTION if not supported
+ */
+static int s10_protected_reg_write(void __iomem *base,
+				   unsigned int reg, unsigned int val)
+{
+	struct arm_smccc_res result;
+	unsigned long sysmgr_base = (unsigned long)base;
+
+	arm_smccc_smc(INTEL_SIP_SMC_REG_WRITE, sysmgr_base + reg,
+		      val, 0, 0, 0, 0, 0, &result);
+
+	return (int)result.a0;
+}
+
+/**
+ * s10_protected_reg_read
+ * Read the status of a protected SMC register
+ * @base: Base address of System Manager.
+ * @reg:  Address of register
+ * @val:  Value read.
+ * Return: INTEL_SIP_SMC_STATUS_OK (0) on success
+ *	   INTEL_SIP_SMC_REG_ERROR on error
+ *	   INTEL_SIP_SMC_RETURN_UNKNOWN_FUNCTION if not supported
+ */
+static int s10_protected_reg_read(void __iomem *base,
+				  unsigned int reg, unsigned int *val)
+{
+	struct arm_smccc_res result;
+	unsigned long sysmgr_base = (unsigned long)base;
+
+	arm_smccc_smc(INTEL_SIP_SMC_REG_READ, sysmgr_base + reg,
+		      0, 0, 0, 0, 0, 0, &result);
+
+	*val = (unsigned int)result.a1;
+
+	return (int)result.a0;
+}
+
+static const struct regmap_config s10_sysmgr_regmap_cfg = {
+	.name = "s10_sysmgr",
+	.reg_bits = 32,
+	.reg_stride = 4,
+	.val_bits = 32,
+	.reg_read = s10_protected_reg_read,
+	.reg_write = s10_protected_reg_write,
+	.fast_io = true,
+	.use_single_rw = true,
+};
+
+/**
+ * socfpga_is_s10
+ * Determine if running on Stratix10 platform.
+ * Return: True if running Stratix10, otherwise false.
+ */
+static int socfpga_is_s10(void)
+{
+	return of_machine_is_compatible("altr,socfpga-stratix10");
+}
+
+/**
+ * of_sysmgr_register
+ * Create and register the Altera System Manager regmap.
+ * Return: Pointer to new sysmgr on success.
+ *         Pointer error on failure.
+ */
+static struct altr_sysmgr *of_sysmgr_register(struct device_node *np)
+{
+	struct altr_sysmgr *sysmgr;
+	struct regmap *regmap;
+	u32 reg_io_width;
+	int ret;
+	struct regmap_config sysmgr_config = s10_sysmgr_regmap_cfg;
+	struct resource res;
+
+	if (!of_device_is_compatible(np, "altr,sys-mgr"))
+		return ERR_PTR(-EINVAL);
+
+	sysmgr = kzalloc(sizeof(*sysmgr), GFP_KERNEL);
+	if (!sysmgr)
+		return ERR_PTR(-ENOMEM);
+
+	if (of_address_to_resource(np, 0, &res)) {
+		ret = -ENOMEM;
+		goto err_map;
+	}
+
+	/* Need physical address for SMCC call */
+	sysmgr->base = (void __iomem *)res.start;
+
+	/*
+	 * search for reg-io-width property in DT. If it is not provided,
+	 * default to 4 bytes. regmap_init will return an error if values
+	 * are invalid so there is no need to check them here.
+	 */
+	ret = of_property_read_u32(np, "reg-io-width", &reg_io_width);
+	if (ret)
+		reg_io_width = 4;
+
+	sysmgr_config.reg_stride = reg_io_width;
+	sysmgr_config.val_bits = reg_io_width * 8;
+	sysmgr_config.max_register = resource_size(&res) - reg_io_width;
+
+	regmap = regmap_init(NULL, NULL, sysmgr->base, &sysmgr_config);
+	if (IS_ERR(regmap)) {
+		pr_err("regmap init failed\n");
+		ret = PTR_ERR(regmap);
+		goto err_map;
+	}
+
+	sysmgr->regmap = regmap;
+
+	p_sysmgr = sysmgr;
+
+	return sysmgr;
+
+err_map:
+	kfree(sysmgr);
+	return ERR_PTR(ret);
+}
+
+struct regmap *altr_sysmgr_node_to_regmap(struct device_node *np)
+{
+	struct altr_sysmgr *sysmgr = NULL;
+
+	if (!socfpga_is_s10())
+		return syscon_node_to_regmap(np);
+
+	if (!p_sysmgr)
+		sysmgr = of_sysmgr_register(np);
+	else
+		sysmgr = p_sysmgr;
+
+	if (IS_ERR_OR_NULL(sysmgr))
+		return ERR_CAST(sysmgr);
+
+	return sysmgr->regmap;
+}
+EXPORT_SYMBOL_GPL(altr_sysmgr_node_to_regmap);
+
+struct regmap *altr_sysmgr_regmap_lookup_by_compatible(const char *s)
+{
+	struct device_node *sysmgr_np;
+	struct regmap *regmap;
+
+	if (!socfpga_is_s10())
+		return syscon_regmap_lookup_by_compatible(s);
+
+	sysmgr_np = of_find_compatible_node(NULL, NULL, s);
+	if (!sysmgr_np)
+		return ERR_PTR(-ENODEV);
+
+	regmap = altr_sysmgr_node_to_regmap(sysmgr_np);
+	of_node_put(sysmgr_np);
+
+	return regmap;
+}
+EXPORT_SYMBOL_GPL(altr_sysmgr_regmap_lookup_by_compatible);
+
+static int sysmgr_match_pdevname(struct device *dev, void *data)
+{
+	return !strcmp(dev_name(dev), (const char *)data);
+}
+
+struct regmap *altr_sysmgr_regmap_lookup_by_pdevname(const char *s)
+{
+	struct device *dev;
+	struct altr_sysmgr *sysmgr;
+
+	if (!socfpga_is_s10())
+		return syscon_regmap_lookup_by_pdevname(s);
+
+	dev = driver_find_device(&sysmgr_driver.driver, NULL, (void *)s,
+				 sysmgr_match_pdevname);
+	if (!dev)
+		return ERR_PTR(-EPROBE_DEFER);
+
+	sysmgr = dev_get_drvdata(dev);
+
+	return sysmgr->regmap;
+}
+EXPORT_SYMBOL_GPL(altr_sysmgr_regmap_lookup_by_pdevname);
+
+struct regmap *altr_sysmgr_regmap_lookup_by_phandle(struct device_node *np,
+						    const char *property)
+{
+	struct device_node *sysmgr_np;
+	struct regmap *regmap;
+
+	if (!socfpga_is_s10())
+		return syscon_regmap_lookup_by_phandle(np, property);
+
+	if (property)
+		sysmgr_np = of_parse_phandle(np, property, 0);
+	else
+		sysmgr_np = np;
+
+	if (!sysmgr_np)
+		return ERR_PTR(-ENODEV);
+
+	regmap = altr_sysmgr_node_to_regmap(sysmgr_np);
+	of_node_put(sysmgr_np);
+
+	return regmap;
+}
+EXPORT_SYMBOL_GPL(altr_sysmgr_regmap_lookup_by_phandle);
+
+static int sysmgr_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct altr_sysmgr *sysmgr;
+	struct resource *res;
+
+	if (!socfpga_is_s10())
+		return -ENODEV;
+
+	/* Skip Initialization if already created */
+	if (p_sysmgr)
+		goto finish;
+
+	sysmgr = of_sysmgr_register(pdev->dev.of_node);
+	if (IS_ERR_OR_NULL(sysmgr)) {
+		dev_err(dev, "regmap init failed\n");
+		return -ENODEV;
+	}
+
+finish:
+	platform_set_drvdata(pdev, p_sysmgr);
+
+	dev_dbg(dev, "regmap %pR registered\n", res);
+
+	return 0;
+}
+
+static const struct of_device_id altr_sysmgr_of_match[] = {
+	{ .compatible = "altr,sys-mgr" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, altr_sysmgr_of_match);
+
+static struct platform_driver altr_sysmgr_driver = {
+	.probe =  sysmgr_probe,
+	.driver = {
+		.name = "altr,system_manager",
+		.of_match_table = altr_sysmgr_of_match,
+	},
+};
+
+static int __init altr_sysmgr_init(void)
+{
+	return platform_driver_register(&altr_sysmgr_driver);
+}
+core_initcall(altr_sysmgr_init);
+
+static void __exit altr_sysmgr_exit(void)
+{
+	platform_driver_unregister(&altr_sysmgr_driver);
+}
+module_exit(altr_sysmgr_exit);
+
+MODULE_AUTHOR("Thor Thayer <>");
+MODULE_DESCRIPTION("SOCFPGA System Manager driver");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/mfd/altera-sysmgr.h b/include/linux/mfd/altera-sysmgr.h
new file mode 100644
index 000000000000..b82116706319
--- /dev/null
+++ b/include/linux/mfd/altera-sysmgr.h
@@ -0,0 +1,113 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2018 Intel Corporation
+ * Copyright (C) 2012 Freescale Semiconductor, Inc.
+ * Copyright (C) 2012 Linaro Ltd.
+ */
+
+#ifndef __LINUX_MFD_ALTERA_SYSMGR_H__
+#define __LINUX_MFD_ALTERA_SYSMGR_H__
+
+#include <linux/err.h>
+#include <linux/errno.h>
+
+struct device_node;
+
+#ifdef CONFIG_MFD_ALTERA_SYSMGR
+struct regmap *altr_sysmgr_node_to_regmap(struct device_node *np);
+struct regmap *altr_sysmgr_regmap_lookup_by_compatible(const char *s);
+struct regmap *altr_sysmgr_regmap_lookup_by_pdevname(const char *s);
+struct regmap *altr_sysmgr_regmap_lookup_by_phandle(struct device_node *np,
+						    const char *property);
+
+/*
+ * Functions specified by ARM SMC Calling convention:
+ *
+ * FAST call executes atomic operations, returns when the requested operation
+ * has completed.
+ * STD call starts a operation which can be preempted by a non-secure
+ * interrupt.
+ *
+ * a0..a7 is used as register names in the descriptions below, on arm32
+ * that translates to r0..r7 and on arm64 to w0..w7.
+ */
+
+#define INTEL_SIP_SMC_STD_CALL_VAL(func_num) \
+	ARM_SMCCC_CALL_VAL(ARM_SMCCC_STD_CALL, ARM_SMCCC_SMC_64, \
+	ARM_SMCCC_OWNER_SIP, (func_num))
+
+#define INTEL_SIP_SMC_FAST_CALL_VAL(func_num) \
+	ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, ARM_SMCCC_SMC_64, \
+	ARM_SMCCC_OWNER_SIP, (func_num))
+
+#define INTEL_SIP_SMC_RETURN_UNKNOWN_FUNCTION		0xFFFFFFFF
+#define INTEL_SIP_SMC_STATUS_OK				0x0
+#define INTEL_SIP_SMC_REG_ERROR				0x5
+
+/*
+ * Request INTEL_SIP_SMC_REG_READ
+ *
+ * Read a protected register using SMCCC
+ *
+ * Call register usage:
+ * a0: INTEL_SIP_SMC_REG_READ.
+ * a1: register address.
+ * a2-7: not used.
+ *
+ * Return status:
+ * a0: INTEL_SIP_SMC_STATUS_OK, INTEL_SIP_SMC_REG_ERROR, or
+ *     INTEL_SIP_SMC_RETURN_UNKNOWN_FUNCTION
+ * a1: Value in the register
+ * a2-3: not used.
+ */
+#define INTEL_SIP_SMC_FUNCID_REG_READ 7
+#define INTEL_SIP_SMC_REG_READ \
+	INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_REG_READ)
+
+/*
+ * Request INTEL_SIP_SMC_REG_WRITE
+ *
+ * Write a protected register using SMCCC
+ *
+ * Call register usage:
+ * a0: INTEL_SIP_SMC_REG_WRITE.
+ * a1: register address
+ * a2: value to program into register.
+ * a3-7: not used.
+ *
+ * Return status:
+ * a0: INTEL_SIP_SMC_STATUS_OK, INTEL_SIP_SMC_REG_ERROR, or
+ *     INTEL_SIP_SMC_RETURN_UNKNOWN_FUNCTION
+ * a1-3: not used.
+ */
+#define INTEL_SIP_SMC_FUNCID_REG_WRITE 8
+#define INTEL_SIP_SMC_REG_WRITE \
+	INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_REG_WRITE)
+
+#else
+static inline struct regmap *altr_sysmgr_node_to_regmap(struct device_node *np)
+{
+	return ERR_PTR(-ENOTSUPP);
+}
+
+static inline struct regmap *
+altr_sysmgr_regmap_lookup_by_compatible(const char *s)
+{
+	return ERR_PTR(-ENOTSUPP);
+}
+
+static inline struct regmap *
+altr_sysmgr_regmap_lookup_by_pdevname(const char *s)
+{
+	return ERR_PTR(-ENOTSUPP);
+}
+
+static inline struct regmap *
+altr_sysmgr_regmap_lookup_by_phandle(struct device_node *np,
+				     const char *property)
+{
+	return ERR_PTR(-ENOTSUPP);
+}
+#endif
+
+#endif /* __LINUX_MFD_ALTERA_SYSMGR_H__ */
-- 
2.7.4

[PATCH 1/4] mfd: altera-sysmgr: Add SOCFPGA System Manager

[thor.thayer at linux.intel.com]

From: Thor Thayer <thor.thayer@linux.intel.com>

The SOCFPGA System Manager register block aggregates different
peripheral functions into one area.
On 32 bit ARM parts, the syscon driver is used for accesses.
On 64 bit ARM parts, the System Manager can only be accessed by
EL3 secure mode. Since a SMC call to EL3 is required, this new
driver uses regmaps similar to syscon to handle the SMC call.

Since regmaps abstract out the underlying register access, the
changes to drivers accessing the System Manager are minimal.

Signed-off-by: Thor Thayer <thor.thayer@linux.intel.com>
---
 MAINTAINERS                       |   6 +
 drivers/mfd/Kconfig               |   9 ++
 drivers/mfd/Makefile              |   1 +
 drivers/mfd/altera-sysmgr.c       | 310 ++++++++++++++++++++++++++++++++++++++
 include/linux/mfd/altera-sysmgr.h | 113 ++++++++++++++
 5 files changed, 439 insertions(+)
 create mode 100644 drivers/mfd/altera-sysmgr.c
 create mode 100644 include/linux/mfd/altera-sysmgr.h

diff --git a/MAINTAINERS b/MAINTAINERS
index d9e6d86488df..bda6b2173cc6 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -692,6 +692,12 @@ L:	linux-gpio at vger.kernel.org
 S:	Maintained
 F:	drivers/gpio/gpio-altera.c
 
+ALTERA SYSTEM MANAGER DRIVER
+M:	Thor Thayer <thor.thayer@linux.intel.com>
+S:	Maintained
+F:	drivers/mfd/altera-sysmgr.c
+F:	include/linux/mfd/altera-sysgmr.h
+
 ALTERA SYSTEM RESOURCE DRIVER FOR ARRIA10 DEVKIT
 M:	Thor Thayer <thor.thayer@linux.intel.com>
 S:	Maintained
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index f3a5f8d02790..1192a25186c7 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -29,6 +29,15 @@ config MFD_ALTERA_A10SR
 	  accessing the external gpio extender (LEDs & buttons) and
 	  power supply alarms (hwmon).
 
+config MFD_ALTERA_SYSMGR
+	bool "Altera SOCFPGA System Manager"
+	depends on (ARCH_SOCFPGA || ARCH_STRATIX10) && OF
+	select MFD_SYSCON
+	help
+	  Select this to get System Manager support for all Altera branded
+	  SOCFPGAs. The SOCFPGA System Manager handles all SOCFPGAs by
+	  using syscon for ARM32 parts and SMC calls to EL3 for ARM64 parts.
+
 config MFD_ACT8945A
 	tristate "Active-semi ACT8945A"
 	select MFD_CORE
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 5856a9489cbd..bc1508e3ff7b 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -232,6 +232,7 @@ obj-$(CONFIG_INTEL_SOC_PMIC_CHTDC_TI)	+= intel_soc_pmic_chtdc_ti.o
 obj-$(CONFIG_MFD_MT6397)	+= mt6397-core.o
 
 obj-$(CONFIG_MFD_ALTERA_A10SR)	+= altera-a10sr.o
+obj-$(CONFIG_MFD_ALTERA_SYSMGR) += altera-sysmgr.o
 obj-$(CONFIG_MFD_SUN4I_GPADC)	+= sun4i-gpadc.o
 
 obj-$(CONFIG_MFD_STM32_LPTIMER)	+= stm32-lptimer.o
diff --git a/drivers/mfd/altera-sysmgr.c b/drivers/mfd/altera-sysmgr.c
new file mode 100644
index 000000000000..29b0bfcb3f69
--- /dev/null
+++ b/drivers/mfd/altera-sysmgr.c
@@ -0,0 +1,310 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *  Copyright (C) 2017-2018, Intel Corporation.
+ *  Copyright (C) 2012 Freescale Semiconductor, Inc.
+ *  Copyright (C) 2012 Linaro Ltd.
+ *
+ *  Based on syscon driver.
+ */
+
+#include <linux/arm-smccc.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/mfd/altera-sysmgr.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+static struct platform_driver sysmgr_driver;
+
+/**
+ * struct altr_sysmgr - Altera SOCFPGA System Manager
+ * @regmap: the regmap used for System Manager accesses.
+ * @base  : the base address for the System Manager
+ */
+struct altr_sysmgr {
+	struct regmap *regmap;
+	void __iomem  *base;
+};
+
+/**
+ * Only 1 instance of System Manager is needed but many
+ * consumers will want to access it with the matching
+ * functions below.
+ */
+static struct altr_sysmgr *p_sysmgr;
+
+/**
+ * s10_protected_reg_write
+ * Write to a protected SMC register.
+ * @base: Base address of System Manager
+ * @reg:  Address offset of register
+ * @val:  Value to write
+ * Return: INTEL_SIP_SMC_STATUS_OK (0) on success
+ *	   INTEL_SIP_SMC_REG_ERROR on error
+ *	   INTEL_SIP_SMC_RETURN_UNKNOWN_FUNCTION if not supported
+ */
+static int s10_protected_reg_write(void __iomem *base,
+				   unsigned int reg, unsigned int val)
+{
+	struct arm_smccc_res result;
+	unsigned long sysmgr_base = (unsigned long)base;
+
+	arm_smccc_smc(INTEL_SIP_SMC_REG_WRITE, sysmgr_base + reg,
+		      val, 0, 0, 0, 0, 0, &result);
+
+	return (int)result.a0;
+}
+
+/**
+ * s10_protected_reg_read
+ * Read the status of a protected SMC register
+ * @base: Base address of System Manager.
+ * @reg:  Address of register
+ * @val:  Value read.
+ * Return: INTEL_SIP_SMC_STATUS_OK (0) on success
+ *	   INTEL_SIP_SMC_REG_ERROR on error
+ *	   INTEL_SIP_SMC_RETURN_UNKNOWN_FUNCTION if not supported
+ */
+static int s10_protected_reg_read(void __iomem *base,
+				  unsigned int reg, unsigned int *val)
+{
+	struct arm_smccc_res result;
+	unsigned long sysmgr_base = (unsigned long)base;
+
+	arm_smccc_smc(INTEL_SIP_SMC_REG_READ, sysmgr_base + reg,
+		      0, 0, 0, 0, 0, 0, &result);
+
+	*val = (unsigned int)result.a1;
+
+	return (int)result.a0;
+}
+
+static const struct regmap_config s10_sysmgr_regmap_cfg = {
+	.name = "s10_sysmgr",
+	.reg_bits = 32,
+	.reg_stride = 4,
+	.val_bits = 32,
+	.reg_read = s10_protected_reg_read,
+	.reg_write = s10_protected_reg_write,
+	.fast_io = true,
+	.use_single_rw = true,
+};
+
+/**
+ * socfpga_is_s10
+ * Determine if running on Stratix10 platform.
+ * Return: True if running Stratix10, otherwise false.
+ */
+static int socfpga_is_s10(void)
+{
+	return of_machine_is_compatible("altr,socfpga-stratix10");
+}
+
+/**
+ * of_sysmgr_register
+ * Create and register the Altera System Manager regmap.
+ * Return: Pointer to new sysmgr on success.
+ *         Pointer error on failure.
+ */
+static struct altr_sysmgr *of_sysmgr_register(struct device_node *np)
+{
+	struct altr_sysmgr *sysmgr;
+	struct regmap *regmap;
+	u32 reg_io_width;
+	int ret;
+	struct regmap_config sysmgr_config = s10_sysmgr_regmap_cfg;
+	struct resource res;
+
+	if (!of_device_is_compatible(np, "altr,sys-mgr"))
+		return ERR_PTR(-EINVAL);
+
+	sysmgr = kzalloc(sizeof(*sysmgr), GFP_KERNEL);
+	if (!sysmgr)
+		return ERR_PTR(-ENOMEM);
+
+	if (of_address_to_resource(np, 0, &res)) {
+		ret = -ENOMEM;
+		goto err_map;
+	}
+
+	/* Need physical address for SMCC call */
+	sysmgr->base = (void __iomem *)res.start;
+
+	/*
+	 * search for reg-io-width property in DT. If it is not provided,
+	 * default to 4 bytes. regmap_init will return an error if values
+	 * are invalid so there is no need to check them here.
+	 */
+	ret = of_property_read_u32(np, "reg-io-width", &reg_io_width);
+	if (ret)
+		reg_io_width = 4;
+
+	sysmgr_config.reg_stride = reg_io_width;
+	sysmgr_config.val_bits = reg_io_width * 8;
+	sysmgr_config.max_register = resource_size(&res) - reg_io_width;
+
+	regmap = regmap_init(NULL, NULL, sysmgr->base, &sysmgr_config);
+	if (IS_ERR(regmap)) {
+		pr_err("regmap init failed\n");
+		ret = PTR_ERR(regmap);
+		goto err_map;
+	}
+
+	sysmgr->regmap = regmap;
+
+	p_sysmgr = sysmgr;
+
+	return sysmgr;
+
+err_map:
+	kfree(sysmgr);
+	return ERR_PTR(ret);
+}
+
+struct regmap *altr_sysmgr_node_to_regmap(struct device_node *np)
+{
+	struct altr_sysmgr *sysmgr = NULL;
+
+	if (!socfpga_is_s10())
+		return syscon_node_to_regmap(np);
+
+	if (!p_sysmgr)
+		sysmgr = of_sysmgr_register(np);
+	else
+		sysmgr = p_sysmgr;
+
+	if (IS_ERR_OR_NULL(sysmgr))
+		return ERR_CAST(sysmgr);
+
+	return sysmgr->regmap;
+}
+EXPORT_SYMBOL_GPL(altr_sysmgr_node_to_regmap);
+
+struct regmap *altr_sysmgr_regmap_lookup_by_compatible(const char *s)
+{
+	struct device_node *sysmgr_np;
+	struct regmap *regmap;
+
+	if (!socfpga_is_s10())
+		return syscon_regmap_lookup_by_compatible(s);
+
+	sysmgr_np = of_find_compatible_node(NULL, NULL, s);
+	if (!sysmgr_np)
+		return ERR_PTR(-ENODEV);
+
+	regmap = altr_sysmgr_node_to_regmap(sysmgr_np);
+	of_node_put(sysmgr_np);
+
+	return regmap;
+}
+EXPORT_SYMBOL_GPL(altr_sysmgr_regmap_lookup_by_compatible);
+
+static int sysmgr_match_pdevname(struct device *dev, void *data)
+{
+	return !strcmp(dev_name(dev), (const char *)data);
+}
+
+struct regmap *altr_sysmgr_regmap_lookup_by_pdevname(const char *s)
+{
+	struct device *dev;
+	struct altr_sysmgr *sysmgr;
+
+	if (!socfpga_is_s10())
+		return syscon_regmap_lookup_by_pdevname(s);
+
+	dev = driver_find_device(&sysmgr_driver.driver, NULL, (void *)s,
+				 sysmgr_match_pdevname);
+	if (!dev)
+		return ERR_PTR(-EPROBE_DEFER);
+
+	sysmgr = dev_get_drvdata(dev);
+
+	return sysmgr->regmap;
+}
+EXPORT_SYMBOL_GPL(altr_sysmgr_regmap_lookup_by_pdevname);
+
+struct regmap *altr_sysmgr_regmap_lookup_by_phandle(struct device_node *np,
+						    const char *property)
+{
+	struct device_node *sysmgr_np;
+	struct regmap *regmap;
+
+	if (!socfpga_is_s10())
+		return syscon_regmap_lookup_by_phandle(np, property);
+
+	if (property)
+		sysmgr_np = of_parse_phandle(np, property, 0);
+	else
+		sysmgr_np = np;
+
+	if (!sysmgr_np)
+		return ERR_PTR(-ENODEV);
+
+	regmap = altr_sysmgr_node_to_regmap(sysmgr_np);
+	of_node_put(sysmgr_np);
+
+	return regmap;
+}
+EXPORT_SYMBOL_GPL(altr_sysmgr_regmap_lookup_by_phandle);
+
+static int sysmgr_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct altr_sysmgr *sysmgr;
+	struct resource *res;
+
+	if (!socfpga_is_s10())
+		return -ENODEV;
+
+	/* Skip Initialization if already created */
+	if (p_sysmgr)
+		goto finish;
+
+	sysmgr = of_sysmgr_register(pdev->dev.of_node);
+	if (IS_ERR_OR_NULL(sysmgr)) {
+		dev_err(dev, "regmap init failed\n");
+		return -ENODEV;
+	}
+
+finish:
+	platform_set_drvdata(pdev, p_sysmgr);
+
+	dev_dbg(dev, "regmap %pR registered\n", res);
+
+	return 0;
+}
+
+static const struct of_device_id altr_sysmgr_of_match[] = {
+	{ .compatible = "altr,sys-mgr" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, altr_sysmgr_of_match);
+
+static struct platform_driver altr_sysmgr_driver = {
+	.probe =  sysmgr_probe,
+	.driver = {
+		.name = "altr,system_manager",
+		.of_match_table = altr_sysmgr_of_match,
+	},
+};
+
+static int __init altr_sysmgr_init(void)
+{
+	return platform_driver_register(&altr_sysmgr_driver);
+}
+core_initcall(altr_sysmgr_init);
+
+static void __exit altr_sysmgr_exit(void)
+{
+	platform_driver_unregister(&altr_sysmgr_driver);
+}
+module_exit(altr_sysmgr_exit);
+
+MODULE_AUTHOR("Thor Thayer <>");
+MODULE_DESCRIPTION("SOCFPGA System Manager driver");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/mfd/altera-sysmgr.h b/include/linux/mfd/altera-sysmgr.h
new file mode 100644
index 000000000000..b82116706319
--- /dev/null
+++ b/include/linux/mfd/altera-sysmgr.h
@@ -0,0 +1,113 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2018 Intel Corporation
+ * Copyright (C) 2012 Freescale Semiconductor, Inc.
+ * Copyright (C) 2012 Linaro Ltd.
+ */
+
+#ifndef __LINUX_MFD_ALTERA_SYSMGR_H__
+#define __LINUX_MFD_ALTERA_SYSMGR_H__
+
+#include <linux/err.h>
+#include <linux/errno.h>
+
+struct device_node;
+
+#ifdef CONFIG_MFD_ALTERA_SYSMGR
+struct regmap *altr_sysmgr_node_to_regmap(struct device_node *np);
+struct regmap *altr_sysmgr_regmap_lookup_by_compatible(const char *s);
+struct regmap *altr_sysmgr_regmap_lookup_by_pdevname(const char *s);
+struct regmap *altr_sysmgr_regmap_lookup_by_phandle(struct device_node *np,
+						    const char *property);
+
+/*
+ * Functions specified by ARM SMC Calling convention:
+ *
+ * FAST call executes atomic operations, returns when the requested operation
+ * has completed.
+ * STD call starts a operation which can be preempted by a non-secure
+ * interrupt.
+ *
+ * a0..a7 is used as register names in the descriptions below, on arm32
+ * that translates to r0..r7 and on arm64 to w0..w7.
+ */
+
+#define INTEL_SIP_SMC_STD_CALL_VAL(func_num) \
+	ARM_SMCCC_CALL_VAL(ARM_SMCCC_STD_CALL, ARM_SMCCC_SMC_64, \
+	ARM_SMCCC_OWNER_SIP, (func_num))
+
+#define INTEL_SIP_SMC_FAST_CALL_VAL(func_num) \
+	ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, ARM_SMCCC_SMC_64, \
+	ARM_SMCCC_OWNER_SIP, (func_num))
+
+#define INTEL_SIP_SMC_RETURN_UNKNOWN_FUNCTION		0xFFFFFFFF
+#define INTEL_SIP_SMC_STATUS_OK				0x0
+#define INTEL_SIP_SMC_REG_ERROR				0x5
+
+/*
+ * Request INTEL_SIP_SMC_REG_READ
+ *
+ * Read a protected register using SMCCC
+ *
+ * Call register usage:
+ * a0: INTEL_SIP_SMC_REG_READ.
+ * a1: register address.
+ * a2-7: not used.
+ *
+ * Return status:
+ * a0: INTEL_SIP_SMC_STATUS_OK, INTEL_SIP_SMC_REG_ERROR, or
+ *     INTEL_SIP_SMC_RETURN_UNKNOWN_FUNCTION
+ * a1: Value in the register
+ * a2-3: not used.
+ */
+#define INTEL_SIP_SMC_FUNCID_REG_READ 7
+#define INTEL_SIP_SMC_REG_READ \
+	INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_REG_READ)
+
+/*
+ * Request INTEL_SIP_SMC_REG_WRITE
+ *
+ * Write a protected register using SMCCC
+ *
+ * Call register usage:
+ * a0: INTEL_SIP_SMC_REG_WRITE.
+ * a1: register address
+ * a2: value to program into register.
+ * a3-7: not used.
+ *
+ * Return status:
+ * a0: INTEL_SIP_SMC_STATUS_OK, INTEL_SIP_SMC_REG_ERROR, or
+ *     INTEL_SIP_SMC_RETURN_UNKNOWN_FUNCTION
+ * a1-3: not used.
+ */
+#define INTEL_SIP_SMC_FUNCID_REG_WRITE 8
+#define INTEL_SIP_SMC_REG_WRITE \
+	INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_REG_WRITE)
+
+#else
+static inline struct regmap *altr_sysmgr_node_to_regmap(struct device_node *np)
+{
+	return ERR_PTR(-ENOTSUPP);
+}
+
+static inline struct regmap *
+altr_sysmgr_regmap_lookup_by_compatible(const char *s)
+{
+	return ERR_PTR(-ENOTSUPP);
+}
+
+static inline struct regmap *
+altr_sysmgr_regmap_lookup_by_pdevname(const char *s)
+{
+	return ERR_PTR(-ENOTSUPP);
+}
+
+static inline struct regmap *
+altr_sysmgr_regmap_lookup_by_phandle(struct device_node *np,
+				     const char *property)
+{
+	return ERR_PTR(-ENOTSUPP);
+}
+#endif
+
+#endif /* __LINUX_MFD_ALTERA_SYSMGR_H__ */
-- 
2.7.4

[PATCH 2/4] ARM: socfpga_defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR

[thor.thayer]

From: Thor Thayer <thor.thayer@linux.intel.com>

Add System Manager driver by default for SOCFPGA ARM32 platforms.

Signed-off-by: Thor Thayer <thor.thayer@linux.intel.com>
---
 arch/arm/configs/socfpga_defconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/configs/socfpga_defconfig b/arch/arm/configs/socfpga_defconfig
index 371fca4e1ab7..c510a32f9f0d 100644
--- a/arch/arm/configs/socfpga_defconfig
+++ b/arch/arm/configs/socfpga_defconfig
@@ -109,6 +109,7 @@ CONFIG_SENSORS_LTC2978_REGULATOR=y
 CONFIG_WATCHDOG=y
 CONFIG_DW_WATCHDOG=y
 CONFIG_MFD_ALTERA_A10SR=y
+CONFIG_MFD_ALTERA_SYSMGR=y
 CONFIG_MFD_STMPE=y
 CONFIG_REGULATOR=y
 CONFIG_REGULATOR_FIXED_VOLTAGE=y
-- 
2.7.4

[PATCH 2/4] ARM: socfpga_defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR

[thor.thayer at linux.intel.com]

From: Thor Thayer <thor.thayer@linux.intel.com>

Add System Manager driver by default for SOCFPGA ARM32 platforms.

Signed-off-by: Thor Thayer <thor.thayer@linux.intel.com>
---
 arch/arm/configs/socfpga_defconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/configs/socfpga_defconfig b/arch/arm/configs/socfpga_defconfig
index 371fca4e1ab7..c510a32f9f0d 100644
--- a/arch/arm/configs/socfpga_defconfig
+++ b/arch/arm/configs/socfpga_defconfig
@@ -109,6 +109,7 @@ CONFIG_SENSORS_LTC2978_REGULATOR=y
 CONFIG_WATCHDOG=y
 CONFIG_DW_WATCHDOG=y
 CONFIG_MFD_ALTERA_A10SR=y
+CONFIG_MFD_ALTERA_SYSMGR=y
 CONFIG_MFD_STMPE=y
 CONFIG_REGULATOR=y
 CONFIG_REGULATOR_FIXED_VOLTAGE=y
-- 
2.7.4

[PATCH 3/4] arm64: defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR

[thor.thayer]

From: Thor Thayer <thor.thayer@linux.intel.com>

Enable the Stratix10 System Manager by default.

Signed-off-by: Thor Thayer <thor.thayer@linux.intel.com>
---
 arch/arm64/configs/defconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index f67e8d5e93ad..f15d4b1a9417 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -377,6 +377,7 @@ CONFIG_MESON_WATCHDOG=m
 CONFIG_RENESAS_WDT=y
 CONFIG_UNIPHIER_WATCHDOG=y
 CONFIG_BCM2835_WDT=y
+CONFIG_MFD_ALTERA_SYSMGR=y
 CONFIG_MFD_BD9571MWV=y
 CONFIG_MFD_AXP20X_RSB=y
 CONFIG_MFD_CROS_EC=y
-- 
2.7.4

[PATCH 3/4] arm64: defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR

[thor.thayer at linux.intel.com]

From: Thor Thayer <thor.thayer@linux.intel.com>

Enable the Stratix10 System Manager by default.

Signed-off-by: Thor Thayer <thor.thayer@linux.intel.com>
---
 arch/arm64/configs/defconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index f67e8d5e93ad..f15d4b1a9417 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -377,6 +377,7 @@ CONFIG_MESON_WATCHDOG=m
 CONFIG_RENESAS_WDT=y
 CONFIG_UNIPHIER_WATCHDOG=y
 CONFIG_BCM2835_WDT=y
+CONFIG_MFD_ALTERA_SYSMGR=y
 CONFIG_MFD_BD9571MWV=y
 CONFIG_MFD_AXP20X_RSB=y
 CONFIG_MFD_CROS_EC=y
-- 
2.7.4

[PATCH 4/4] net: stmmac: socfpga: Use shared System Manager driver

[thor.thayer]

From: Thor Thayer <thor.thayer@linux.intel.com>

The ARM64 System Manager requires a different method of reading
the System Manager than ARM32. A new System Manager driver was
created to steer ARM32 System Manager calls to syscon and ARM64
System Manager calls to the new access method.

Convert from syscon to the shared System Manager driver so that
both ARM64 and ARM32 are supported.

Signed-off-by: Thor Thayer <thor.thayer@linux.intel.com>
---
 drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
index 5b3b06a0a3bf..743c7f471edb 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
@@ -15,6 +15,7 @@
  * Adopted from dwmac-sti.c
  */
 
+#include <linux/mfd/altera-sysmgr.h>
 #include <linux/mfd/syscon.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
@@ -114,7 +115,8 @@ static int socfpga_dwmac_parse_data(struct socfpga_dwmac *dwmac, struct device *
 
 	dwmac->interface = of_get_phy_mode(np);
 
-	sys_mgr_base_addr = syscon_regmap_lookup_by_phandle(np, "altr,sysmgr-syscon");
+	sys_mgr_base_addr =
+		altr_sysmgr_regmap_lookup_by_phandle(np, "altr,sysmgr-syscon");
 	if (IS_ERR(sys_mgr_base_addr)) {
 		dev_info(dev, "No sysmgr-syscon node found\n");
 		return PTR_ERR(sys_mgr_base_addr);
-- 
2.7.4

[PATCH 4/4] net: stmmac: socfpga: Use shared System Manager driver

[thor.thayer at linux.intel.com]

From: Thor Thayer <thor.thayer@linux.intel.com>

The ARM64 System Manager requires a different method of reading
the System Manager than ARM32. A new System Manager driver was
created to steer ARM32 System Manager calls to syscon and ARM64
System Manager calls to the new access method.

Convert from syscon to the shared System Manager driver so that
both ARM64 and ARM32 are supported.

Signed-off-by: Thor Thayer <thor.thayer@linux.intel.com>
---
 drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
index 5b3b06a0a3bf..743c7f471edb 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
@@ -15,6 +15,7 @@
  * Adopted from dwmac-sti.c
  */
 
+#include <linux/mfd/altera-sysmgr.h>
 #include <linux/mfd/syscon.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
@@ -114,7 +115,8 @@ static int socfpga_dwmac_parse_data(struct socfpga_dwmac *dwmac, struct device *
 
 	dwmac->interface = of_get_phy_mode(np);
 
-	sys_mgr_base_addr = syscon_regmap_lookup_by_phandle(np, "altr,sysmgr-syscon");
+	sys_mgr_base_addr =
+		altr_sysmgr_regmap_lookup_by_phandle(np, "altr,sysmgr-syscon");
 	if (IS_ERR(sys_mgr_base_addr)) {
 		dev_info(dev, "No sysmgr-syscon node found\n");
 		return PTR_ERR(sys_mgr_base_addr);
-- 
2.7.4

Re: [PATCH 0/4] Add SOCFPGA System Manager

[Thor Thayer]

Hi
On 09/24/2018 05:09 PM, thor.thayer@linux.intel.com wrote:
> From: Thor Thayer <thor.thayer@linux.intel.com>
> 
> Add MFD driver for ARM64 SOCFPGA System Manager to steer
> System Manager calls appropriately.
> The SOCFPGA System Manager includes registers from several
> SOC peripherals.
> 
> On ARM32, syscon handles this aggregated register grouping.
> Redirect System Manager calls to syscon for ARM32 SOCFPGA
> systems.
> 
> The ARM64 System Manager can only be accessed from priority
> level EL3 so this new MFD driver handles the calls to EL3.
> 
> Thor Thayer (4):
>    mfd: altera-sysmgr: Add SOCFPGA System Manager abstraction
>    ARM: socfpga_defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR
>    arm64: defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR
>    net: stmmac: socfpga: Convert to shared System Manager driver
> 
>   MAINTAINERS                                        |   6 +
>   arch/arm/configs/socfpga_defconfig                 |   1 +
>   arch/arm64/configs/defconfig                       |   1 +
>   drivers/mfd/Kconfig                                |   9 +
>   drivers/mfd/Makefile                               |   1 +
>   drivers/mfd/altera-sysmgr.c                        | 310 +++++++++++++++++++++
>   .../net/ethernet/stmicro/stmmac/dwmac-socfpga.c    |   4 +-
>   include/linux/mfd/altera-sysmgr.h                  | 113 ++++++++
>   8 files changed, 444 insertions(+), 1 deletion(-)
>   create mode 100644 drivers/mfd/altera-sysmgr.c
>   create mode 100644 include/linux/mfd/altera-sysmgr.h
> 
Gentle ping.

Thor

[PATCH 0/4] Add SOCFPGA System Manager

[Thor Thayer]

Hi
On 09/24/2018 05:09 PM, thor.thayer at linux.intel.com wrote:
> From: Thor Thayer <thor.thayer@linux.intel.com>
> 
> Add MFD driver for ARM64 SOCFPGA System Manager to steer
> System Manager calls appropriately.
> The SOCFPGA System Manager includes registers from several
> SOC peripherals.
> 
> On ARM32, syscon handles this aggregated register grouping.
> Redirect System Manager calls to syscon for ARM32 SOCFPGA
> systems.
> 
> The ARM64 System Manager can only be accessed from priority
> level EL3 so this new MFD driver handles the calls to EL3.
> 
> Thor Thayer (4):
>    mfd: altera-sysmgr: Add SOCFPGA System Manager abstraction
>    ARM: socfpga_defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR
>    arm64: defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR
>    net: stmmac: socfpga: Convert to shared System Manager driver
> 
>   MAINTAINERS                                        |   6 +
>   arch/arm/configs/socfpga_defconfig                 |   1 +
>   arch/arm64/configs/defconfig                       |   1 +
>   drivers/mfd/Kconfig                                |   9 +
>   drivers/mfd/Makefile                               |   1 +
>   drivers/mfd/altera-sysmgr.c                        | 310 +++++++++++++++++++++
>   .../net/ethernet/stmicro/stmmac/dwmac-socfpga.c    |   4 +-
>   include/linux/mfd/altera-sysmgr.h                  | 113 ++++++++
>   8 files changed, 444 insertions(+), 1 deletion(-)
>   create mode 100644 drivers/mfd/altera-sysmgr.c
>   create mode 100644 include/linux/mfd/altera-sysmgr.h
> 
Gentle ping.

Thor

Re: [PATCH 0/4] Add SOCFPGA System Manager

[Thor Thayer]

Gentle ping again...

Any comments on this patch series?

On 10/10/2018 09:42 AM, Thor Thayer wrote:
> Hi
> On 09/24/2018 05:09 PM, thor.thayer@linux.intel.com wrote:
>> From: Thor Thayer <thor.thayer@linux.intel.com>
>>
>> Add MFD driver for ARM64 SOCFPGA System Manager to steer
>> System Manager calls appropriately.
>> The SOCFPGA System Manager includes registers from several
>> SOC peripherals.
>>
>> On ARM32, syscon handles this aggregated register grouping.
>> Redirect System Manager calls to syscon for ARM32 SOCFPGA
>> systems.
>>
>> The ARM64 System Manager can only be accessed from priority
>> level EL3 so this new MFD driver handles the calls to EL3.
>>
>> Thor Thayer (4):
>>    mfd: altera-sysmgr: Add SOCFPGA System Manager abstraction
>>    ARM: socfpga_defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR
>>    arm64: defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR
>>    net: stmmac: socfpga: Convert to shared System Manager driver
>>
>>   MAINTAINERS                                        |   6 +
>>   arch/arm/configs/socfpga_defconfig                 |   1 +
>>   arch/arm64/configs/defconfig                       |   1 +
>>   drivers/mfd/Kconfig                                |   9 +
>>   drivers/mfd/Makefile                               |   1 +
>>   drivers/mfd/altera-sysmgr.c                        | 310 
>> +++++++++++++++++++++
>>   .../net/ethernet/stmicro/stmmac/dwmac-socfpga.c    |   4 +-
>>   include/linux/mfd/altera-sysmgr.h                  | 113 ++++++++
>>   8 files changed, 444 insertions(+), 1 deletion(-)
>>   create mode 100644 drivers/mfd/altera-sysmgr.c
>>   create mode 100644 include/linux/mfd/altera-sysmgr.h
>>
> Gentle ping.
> 
> Thor

[PATCH 0/4] Add SOCFPGA System Manager

[Thor Thayer]

Gentle ping again...

Any comments on this patch series?

On 10/10/2018 09:42 AM, Thor Thayer wrote:
> Hi
> On 09/24/2018 05:09 PM, thor.thayer at linux.intel.com wrote:
>> From: Thor Thayer <thor.thayer@linux.intel.com>
>>
>> Add MFD driver for ARM64 SOCFPGA System Manager to steer
>> System Manager calls appropriately.
>> The SOCFPGA System Manager includes registers from several
>> SOC peripherals.
>>
>> On ARM32, syscon handles this aggregated register grouping.
>> Redirect System Manager calls to syscon for ARM32 SOCFPGA
>> systems.
>>
>> The ARM64 System Manager can only be accessed from priority
>> level EL3 so this new MFD driver handles the calls to EL3.
>>
>> Thor Thayer (4):
>> ?? mfd: altera-sysmgr: Add SOCFPGA System Manager abstraction
>> ?? ARM: socfpga_defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR
>> ?? arm64: defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR
>> ?? net: stmmac: socfpga: Convert to shared System Manager driver
>>
>> ? MAINTAINERS??????????????????????????????????????? |?? 6 +
>> ? arch/arm/configs/socfpga_defconfig???????????????? |?? 1 +
>> ? arch/arm64/configs/defconfig?????????????????????? |?? 1 +
>> ? drivers/mfd/Kconfig??????????????????????????????? |?? 9 +
>> ? drivers/mfd/Makefile?????????????????????????????? |?? 1 +
>> ? drivers/mfd/altera-sysmgr.c??????????????????????? | 310 
>> +++++++++++++++++++++
>> ? .../net/ethernet/stmicro/stmmac/dwmac-socfpga.c??? |?? 4 +-
>> ? include/linux/mfd/altera-sysmgr.h????????????????? | 113 ++++++++
>> ? 8 files changed, 444 insertions(+), 1 deletion(-)
>> ? create mode 100644 drivers/mfd/altera-sysmgr.c
>> ? create mode 100644 include/linux/mfd/altera-sysmgr.h
>>
> Gentle ping.
> 
> Thor

Re: [PATCH 0/4] Add SOCFPGA System Manager

[Lee Jones]

On Wed, 17 Oct 2018, Thor Thayer wrote:


> On 10/10/2018 09:42 AM, Thor Thayer wrote:
> > Hi
> > On 09/24/2018 05:09 PM, thor.thayer@linux.intel.com wrote:
> > > From: Thor Thayer <thor.thayer@linux.intel.com>
> > > 
> > > Add MFD driver for ARM64 SOCFPGA System Manager to steer
> > > System Manager calls appropriately.
> > > The SOCFPGA System Manager includes registers from several
> > > SOC peripherals.
> > > 
> > > On ARM32, syscon handles this aggregated register grouping.
> > > Redirect System Manager calls to syscon for ARM32 SOCFPGA
> > > systems.
> > > 
> > > The ARM64 System Manager can only be accessed from priority
> > > level EL3 so this new MFD driver handles the calls to EL3.
> > > 
> > > Thor Thayer (4):
> > >    mfd: altera-sysmgr: Add SOCFPGA System Manager abstraction
> > >    ARM: socfpga_defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR
> > >    arm64: defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR
> > >    net: stmmac: socfpga: Convert to shared System Manager driver
> > > 
> > >   MAINTAINERS                                        |   6 +
> > >   arch/arm/configs/socfpga_defconfig                 |   1 +
> > >   arch/arm64/configs/defconfig                       |   1 +
> > >   drivers/mfd/Kconfig                                |   9 +
> > >   drivers/mfd/Makefile                               |   1 +
> > >   drivers/mfd/altera-sysmgr.c                        | 310
> > > +++++++++++++++++++++
> > >   .../net/ethernet/stmicro/stmmac/dwmac-socfpga.c    |   4 +-
> > >   include/linux/mfd/altera-sysmgr.h                  | 113 ++++++++
> > >   8 files changed, 444 insertions(+), 1 deletion(-)
> > >   create mode 100644 drivers/mfd/altera-sysmgr.c
> > >   create mode 100644 include/linux/mfd/altera-sysmgr.h
> > > 
> > Gentle ping.
> 
> Gentle ping again...
> 
> Any comments on this patch series?

"Please don't send content free pings and please allow a reasonable time
for review.  People get busy, go on holiday, attend conferences and so
on so unless there is some reason for urgency (like critical bug fixes)
please allow at least a couple of weeks for review.  If there have been
review comments then people may be waiting for those to be addressed.
Sending content free pings just adds to the mail volume (if they are
seen at all) and if something has gone wrong you'll have to resend the
patches anyway so resending with any comments addressed is generally a
much better approach."

In this case, the we are too late in the series to have these
applied.  Maintainers are generally preparing their submissions for
the merge-window.  The MFD component of this set is marked as "To
Review" and I will get around to it when time is more abundant.

-- 
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

[PATCH 0/4] Add SOCFPGA System Manager

[Lee Jones]

On Wed, 17 Oct 2018, Thor Thayer wrote:


> On 10/10/2018 09:42 AM, Thor Thayer wrote:
> > Hi
> > On 09/24/2018 05:09 PM, thor.thayer at linux.intel.com wrote:
> > > From: Thor Thayer <thor.thayer@linux.intel.com>
> > > 
> > > Add MFD driver for ARM64 SOCFPGA System Manager to steer
> > > System Manager calls appropriately.
> > > The SOCFPGA System Manager includes registers from several
> > > SOC peripherals.
> > > 
> > > On ARM32, syscon handles this aggregated register grouping.
> > > Redirect System Manager calls to syscon for ARM32 SOCFPGA
> > > systems.
> > > 
> > > The ARM64 System Manager can only be accessed from priority
> > > level EL3 so this new MFD driver handles the calls to EL3.
> > > 
> > > Thor Thayer (4):
> > > ?? mfd: altera-sysmgr: Add SOCFPGA System Manager abstraction
> > > ?? ARM: socfpga_defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR
> > > ?? arm64: defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR
> > > ?? net: stmmac: socfpga: Convert to shared System Manager driver
> > > 
> > > ? MAINTAINERS??????????????????????????????????????? |?? 6 +
> > > ? arch/arm/configs/socfpga_defconfig???????????????? |?? 1 +
> > > ? arch/arm64/configs/defconfig?????????????????????? |?? 1 +
> > > ? drivers/mfd/Kconfig??????????????????????????????? |?? 9 +
> > > ? drivers/mfd/Makefile?????????????????????????????? |?? 1 +
> > > ? drivers/mfd/altera-sysmgr.c??????????????????????? | 310
> > > +++++++++++++++++++++
> > > ? .../net/ethernet/stmicro/stmmac/dwmac-socfpga.c??? |?? 4 +-
> > > ? include/linux/mfd/altera-sysmgr.h????????????????? | 113 ++++++++
> > > ? 8 files changed, 444 insertions(+), 1 deletion(-)
> > > ? create mode 100644 drivers/mfd/altera-sysmgr.c
> > > ? create mode 100644 include/linux/mfd/altera-sysmgr.h
> > > 
> > Gentle ping.
> 
> Gentle ping again...
> 
> Any comments on this patch series?

"Please don't send content free pings and please allow a reasonable time
for review.  People get busy, go on holiday, attend conferences and so
on so unless there is some reason for urgency (like critical bug fixes)
please allow at least a couple of weeks for review.  If there have been
review comments then people may be waiting for those to be addressed.
Sending content free pings just adds to the mail volume (if they are
seen at all) and if something has gone wrong you'll have to resend the
patches anyway so resending with any comments addressed is generally a
much better approach."

In this case, the we are too late in the series to have these
applied.  Maintainers are generally preparing their submissions for
the merge-window.  The MFD component of this set is marked as "To
Review" and I will get around to it when time is more abundant.

-- 
Lee Jones [???]
Linaro Services Technical Lead
Linaro.org ? Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

Re: [PATCH 1/4] mfd: altera-sysmgr: Add SOCFPGA System Manager

[Lee Jones]

Arnd,

Would you be so kind as to look at this please?

On Mon, 24 Sep 2018, thor.thayer@linux.intel.com wrote:
> From: Thor Thayer <thor.thayer@linux.intel.com>
> 
> The SOCFPGA System Manager register block aggregates different
> peripheral functions into one area.
> On 32 bit ARM parts, the syscon driver is used for accesses.
> On 64 bit ARM parts, the System Manager can only be accessed by
> EL3 secure mode. Since a SMC call to EL3 is required, this new
> driver uses regmaps similar to syscon to handle the SMC call.
> 
> Since regmaps abstract out the underlying register access, the
> changes to drivers accessing the System Manager are minimal.
> 
> Signed-off-by: Thor Thayer <thor.thayer@linux.intel.com>
> ---
>  MAINTAINERS                       |   6 +
>  drivers/mfd/Kconfig               |   9 ++
>  drivers/mfd/Makefile              |   1 +
>  drivers/mfd/altera-sysmgr.c       | 310 ++++++++++++++++++++++++++++++++++++++
>  include/linux/mfd/altera-sysmgr.h | 113 ++++++++++++++
>  5 files changed, 439 insertions(+)
>  create mode 100644 drivers/mfd/altera-sysmgr.c
>  create mode 100644 include/linux/mfd/altera-sysmgr.h
> 
> diff --git a/MAINTAINERS b/MAINTAINERS
> index d9e6d86488df..bda6b2173cc6 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -692,6 +692,12 @@ L:	linux-gpio@vger.kernel.org
>  S:	Maintained
>  F:	drivers/gpio/gpio-altera.c
>  
> +ALTERA SYSTEM MANAGER DRIVER
> +M:	Thor Thayer <thor.thayer@linux.intel.com>
> +S:	Maintained
> +F:	drivers/mfd/altera-sysmgr.c
> +F:	include/linux/mfd/altera-sysgmr.h
> +
>  ALTERA SYSTEM RESOURCE DRIVER FOR ARRIA10 DEVKIT
>  M:	Thor Thayer <thor.thayer@linux.intel.com>
>  S:	Maintained
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index f3a5f8d02790..1192a25186c7 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -29,6 +29,15 @@ config MFD_ALTERA_A10SR
>  	  accessing the external gpio extender (LEDs & buttons) and
>  	  power supply alarms (hwmon).
>  
> +config MFD_ALTERA_SYSMGR
> +	bool "Altera SOCFPGA System Manager"
> +	depends on (ARCH_SOCFPGA || ARCH_STRATIX10) && OF
> +	select MFD_SYSCON
> +	help
> +	  Select this to get System Manager support for all Altera branded
> +	  SOCFPGAs. The SOCFPGA System Manager handles all SOCFPGAs by
> +	  using syscon for ARM32 parts and SMC calls to EL3 for ARM64 parts.
> +
>  config MFD_ACT8945A
>  	tristate "Active-semi ACT8945A"
>  	select MFD_CORE
> diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> index 5856a9489cbd..bc1508e3ff7b 100644
> --- a/drivers/mfd/Makefile
> +++ b/drivers/mfd/Makefile
> @@ -232,6 +232,7 @@ obj-$(CONFIG_INTEL_SOC_PMIC_CHTDC_TI)	+= intel_soc_pmic_chtdc_ti.o
>  obj-$(CONFIG_MFD_MT6397)	+= mt6397-core.o
>  
>  obj-$(CONFIG_MFD_ALTERA_A10SR)	+= altera-a10sr.o
> +obj-$(CONFIG_MFD_ALTERA_SYSMGR) += altera-sysmgr.o
>  obj-$(CONFIG_MFD_SUN4I_GPADC)	+= sun4i-gpadc.o
>  
>  obj-$(CONFIG_MFD_STM32_LPTIMER)	+= stm32-lptimer.o
> diff --git a/drivers/mfd/altera-sysmgr.c b/drivers/mfd/altera-sysmgr.c
> new file mode 100644
> index 000000000000..29b0bfcb3f69
> --- /dev/null
> +++ b/drivers/mfd/altera-sysmgr.c
> @@ -0,0 +1,310 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + *  Copyright (C) 2017-2018, Intel Corporation.
> + *  Copyright (C) 2012 Freescale Semiconductor, Inc.
> + *  Copyright (C) 2012 Linaro Ltd.
> + *
> + *  Based on syscon driver.
> + */
> +
> +#include <linux/arm-smccc.h>
> +#include <linux/err.h>
> +#include <linux/io.h>
> +#include <linux/mfd/altera-sysmgr.h>
> +#include <linux/mfd/syscon.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/of_address.h>
> +#include <linux/of_platform.h>
> +#include <linux/regmap.h>
> +#include <linux/slab.h>
> +
> +static struct platform_driver sysmgr_driver;
> +
> +/**
> + * struct altr_sysmgr - Altera SOCFPGA System Manager
> + * @regmap: the regmap used for System Manager accesses.
> + * @base  : the base address for the System Manager
> + */
> +struct altr_sysmgr {
> +	struct regmap *regmap;
> +	void __iomem  *base;
> +};
> +
> +/**
> + * Only 1 instance of System Manager is needed but many
> + * consumers will want to access it with the matching
> + * functions below.
> + */
> +static struct altr_sysmgr *p_sysmgr;
> +
> +/**
> + * s10_protected_reg_write
> + * Write to a protected SMC register.
> + * @base: Base address of System Manager
> + * @reg:  Address offset of register
> + * @val:  Value to write
> + * Return: INTEL_SIP_SMC_STATUS_OK (0) on success
> + *	   INTEL_SIP_SMC_REG_ERROR on error
> + *	   INTEL_SIP_SMC_RETURN_UNKNOWN_FUNCTION if not supported
> + */
> +static int s10_protected_reg_write(void __iomem *base,
> +				   unsigned int reg, unsigned int val)
> +{
> +	struct arm_smccc_res result;
> +	unsigned long sysmgr_base = (unsigned long)base;
> +
> +	arm_smccc_smc(INTEL_SIP_SMC_REG_WRITE, sysmgr_base + reg,
> +		      val, 0, 0, 0, 0, 0, &result);
> +
> +	return (int)result.a0;
> +}
> +
> +/**
> + * s10_protected_reg_read
> + * Read the status of a protected SMC register
> + * @base: Base address of System Manager.
> + * @reg:  Address of register
> + * @val:  Value read.
> + * Return: INTEL_SIP_SMC_STATUS_OK (0) on success
> + *	   INTEL_SIP_SMC_REG_ERROR on error
> + *	   INTEL_SIP_SMC_RETURN_UNKNOWN_FUNCTION if not supported
> + */
> +static int s10_protected_reg_read(void __iomem *base,
> +				  unsigned int reg, unsigned int *val)
> +{
> +	struct arm_smccc_res result;
> +	unsigned long sysmgr_base = (unsigned long)base;
> +
> +	arm_smccc_smc(INTEL_SIP_SMC_REG_READ, sysmgr_base + reg,
> +		      0, 0, 0, 0, 0, 0, &result);
> +
> +	*val = (unsigned int)result.a1;
> +
> +	return (int)result.a0;
> +}
> +
> +static const struct regmap_config s10_sysmgr_regmap_cfg = {
> +	.name = "s10_sysmgr",
> +	.reg_bits = 32,
> +	.reg_stride = 4,
> +	.val_bits = 32,
> +	.reg_read = s10_protected_reg_read,
> +	.reg_write = s10_protected_reg_write,
> +	.fast_io = true,
> +	.use_single_rw = true,
> +};
> +
> +/**
> + * socfpga_is_s10
> + * Determine if running on Stratix10 platform.
> + * Return: True if running Stratix10, otherwise false.
> + */
> +static int socfpga_is_s10(void)
> +{
> +	return of_machine_is_compatible("altr,socfpga-stratix10");
> +}
> +
> +/**
> + * of_sysmgr_register
> + * Create and register the Altera System Manager regmap.
> + * Return: Pointer to new sysmgr on success.
> + *         Pointer error on failure.
> + */
> +static struct altr_sysmgr *of_sysmgr_register(struct device_node *np)
> +{
> +	struct altr_sysmgr *sysmgr;
> +	struct regmap *regmap;
> +	u32 reg_io_width;
> +	int ret;
> +	struct regmap_config sysmgr_config = s10_sysmgr_regmap_cfg;
> +	struct resource res;
> +
> +	if (!of_device_is_compatible(np, "altr,sys-mgr"))
> +		return ERR_PTR(-EINVAL);
> +
> +	sysmgr = kzalloc(sizeof(*sysmgr), GFP_KERNEL);
> +	if (!sysmgr)
> +		return ERR_PTR(-ENOMEM);
> +
> +	if (of_address_to_resource(np, 0, &res)) {
> +		ret = -ENOMEM;
> +		goto err_map;
> +	}
> +
> +	/* Need physical address for SMCC call */
> +	sysmgr->base = (void __iomem *)res.start;
> +
> +	/*
> +	 * search for reg-io-width property in DT. If it is not provided,
> +	 * default to 4 bytes. regmap_init will return an error if values
> +	 * are invalid so there is no need to check them here.
> +	 */
> +	ret = of_property_read_u32(np, "reg-io-width", &reg_io_width);
> +	if (ret)
> +		reg_io_width = 4;
> +
> +	sysmgr_config.reg_stride = reg_io_width;
> +	sysmgr_config.val_bits = reg_io_width * 8;
> +	sysmgr_config.max_register = resource_size(&res) - reg_io_width;
> +
> +	regmap = regmap_init(NULL, NULL, sysmgr->base, &sysmgr_config);
> +	if (IS_ERR(regmap)) {
> +		pr_err("regmap init failed\n");
> +		ret = PTR_ERR(regmap);
> +		goto err_map;
> +	}
> +
> +	sysmgr->regmap = regmap;
> +
> +	p_sysmgr = sysmgr;
> +
> +	return sysmgr;
> +
> +err_map:
> +	kfree(sysmgr);
> +	return ERR_PTR(ret);
> +}
> +
> +struct regmap *altr_sysmgr_node_to_regmap(struct device_node *np)
> +{
> +	struct altr_sysmgr *sysmgr = NULL;
> +
> +	if (!socfpga_is_s10())
> +		return syscon_node_to_regmap(np);
> +
> +	if (!p_sysmgr)
> +		sysmgr = of_sysmgr_register(np);
> +	else
> +		sysmgr = p_sysmgr;
> +
> +	if (IS_ERR_OR_NULL(sysmgr))
> +		return ERR_CAST(sysmgr);
> +
> +	return sysmgr->regmap;
> +}
> +EXPORT_SYMBOL_GPL(altr_sysmgr_node_to_regmap);
> +
> +struct regmap *altr_sysmgr_regmap_lookup_by_compatible(const char *s)
> +{
> +	struct device_node *sysmgr_np;
> +	struct regmap *regmap;
> +
> +	if (!socfpga_is_s10())
> +		return syscon_regmap_lookup_by_compatible(s);
> +
> +	sysmgr_np = of_find_compatible_node(NULL, NULL, s);
> +	if (!sysmgr_np)
> +		return ERR_PTR(-ENODEV);
> +
> +	regmap = altr_sysmgr_node_to_regmap(sysmgr_np);
> +	of_node_put(sysmgr_np);
> +
> +	return regmap;
> +}
> +EXPORT_SYMBOL_GPL(altr_sysmgr_regmap_lookup_by_compatible);
> +
> +static int sysmgr_match_pdevname(struct device *dev, void *data)
> +{
> +	return !strcmp(dev_name(dev), (const char *)data);
> +}
> +
> +struct regmap *altr_sysmgr_regmap_lookup_by_pdevname(const char *s)
> +{
> +	struct device *dev;
> +	struct altr_sysmgr *sysmgr;
> +
> +	if (!socfpga_is_s10())
> +		return syscon_regmap_lookup_by_pdevname(s);
> +
> +	dev = driver_find_device(&sysmgr_driver.driver, NULL, (void *)s,
> +				 sysmgr_match_pdevname);
> +	if (!dev)
> +		return ERR_PTR(-EPROBE_DEFER);
> +
> +	sysmgr = dev_get_drvdata(dev);
> +
> +	return sysmgr->regmap;
> +}
> +EXPORT_SYMBOL_GPL(altr_sysmgr_regmap_lookup_by_pdevname);
> +
> +struct regmap *altr_sysmgr_regmap_lookup_by_phandle(struct device_node *np,
> +						    const char *property)
> +{
> +	struct device_node *sysmgr_np;
> +	struct regmap *regmap;
> +
> +	if (!socfpga_is_s10())
> +		return syscon_regmap_lookup_by_phandle(np, property);
> +
> +	if (property)
> +		sysmgr_np = of_parse_phandle(np, property, 0);
> +	else
> +		sysmgr_np = np;
> +
> +	if (!sysmgr_np)
> +		return ERR_PTR(-ENODEV);
> +
> +	regmap = altr_sysmgr_node_to_regmap(sysmgr_np);
> +	of_node_put(sysmgr_np);
> +
> +	return regmap;
> +}
> +EXPORT_SYMBOL_GPL(altr_sysmgr_regmap_lookup_by_phandle);
> +
> +static int sysmgr_probe(struct platform_device *pdev)
> +{
> +	struct device *dev = &pdev->dev;
> +	struct altr_sysmgr *sysmgr;
> +	struct resource *res;
> +
> +	if (!socfpga_is_s10())
> +		return -ENODEV;
> +
> +	/* Skip Initialization if already created */
> +	if (p_sysmgr)
> +		goto finish;
> +
> +	sysmgr = of_sysmgr_register(pdev->dev.of_node);
> +	if (IS_ERR_OR_NULL(sysmgr)) {
> +		dev_err(dev, "regmap init failed\n");
> +		return -ENODEV;
> +	}
> +
> +finish:
> +	platform_set_drvdata(pdev, p_sysmgr);
> +
> +	dev_dbg(dev, "regmap %pR registered\n", res);
> +
> +	return 0;
> +}
> +
> +static const struct of_device_id altr_sysmgr_of_match[] = {
> +	{ .compatible = "altr,sys-mgr" },
> +	{},
> +};
> +MODULE_DEVICE_TABLE(of, altr_sysmgr_of_match);
> +
> +static struct platform_driver altr_sysmgr_driver = {
> +	.probe =  sysmgr_probe,
> +	.driver = {
> +		.name = "altr,system_manager",
> +		.of_match_table = altr_sysmgr_of_match,
> +	},
> +};
> +
> +static int __init altr_sysmgr_init(void)
> +{
> +	return platform_driver_register(&altr_sysmgr_driver);
> +}
> +core_initcall(altr_sysmgr_init);
> +
> +static void __exit altr_sysmgr_exit(void)
> +{
> +	platform_driver_unregister(&altr_sysmgr_driver);
> +}
> +module_exit(altr_sysmgr_exit);
> +
> +MODULE_AUTHOR("Thor Thayer <>");
> +MODULE_DESCRIPTION("SOCFPGA System Manager driver");
> +MODULE_LICENSE("GPL v2");
> diff --git a/include/linux/mfd/altera-sysmgr.h b/include/linux/mfd/altera-sysmgr.h
> new file mode 100644
> index 000000000000..b82116706319
> --- /dev/null
> +++ b/include/linux/mfd/altera-sysmgr.h
> @@ -0,0 +1,113 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Copyright (C) 2018 Intel Corporation
> + * Copyright (C) 2012 Freescale Semiconductor, Inc.
> + * Copyright (C) 2012 Linaro Ltd.
> + */
> +
> +#ifndef __LINUX_MFD_ALTERA_SYSMGR_H__
> +#define __LINUX_MFD_ALTERA_SYSMGR_H__
> +
> +#include <linux/err.h>
> +#include <linux/errno.h>
> +
> +struct device_node;
> +
> +#ifdef CONFIG_MFD_ALTERA_SYSMGR
> +struct regmap *altr_sysmgr_node_to_regmap(struct device_node *np);
> +struct regmap *altr_sysmgr_regmap_lookup_by_compatible(const char *s);
> +struct regmap *altr_sysmgr_regmap_lookup_by_pdevname(const char *s);
> +struct regmap *altr_sysmgr_regmap_lookup_by_phandle(struct device_node *np,
> +						    const char *property);
> +
> +/*
> + * Functions specified by ARM SMC Calling convention:
> + *
> + * FAST call executes atomic operations, returns when the requested operation
> + * has completed.
> + * STD call starts a operation which can be preempted by a non-secure
> + * interrupt.
> + *
> + * a0..a7 is used as register names in the descriptions below, on arm32
> + * that translates to r0..r7 and on arm64 to w0..w7.
> + */
> +
> +#define INTEL_SIP_SMC_STD_CALL_VAL(func_num) \
> +	ARM_SMCCC_CALL_VAL(ARM_SMCCC_STD_CALL, ARM_SMCCC_SMC_64, \
> +	ARM_SMCCC_OWNER_SIP, (func_num))
> +
> +#define INTEL_SIP_SMC_FAST_CALL_VAL(func_num) \
> +	ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, ARM_SMCCC_SMC_64, \
> +	ARM_SMCCC_OWNER_SIP, (func_num))
> +
> +#define INTEL_SIP_SMC_RETURN_UNKNOWN_FUNCTION		0xFFFFFFFF
> +#define INTEL_SIP_SMC_STATUS_OK				0x0
> +#define INTEL_SIP_SMC_REG_ERROR				0x5
> +
> +/*
> + * Request INTEL_SIP_SMC_REG_READ
> + *
> + * Read a protected register using SMCCC
> + *
> + * Call register usage:
> + * a0: INTEL_SIP_SMC_REG_READ.
> + * a1: register address.
> + * a2-7: not used.
> + *
> + * Return status:
> + * a0: INTEL_SIP_SMC_STATUS_OK, INTEL_SIP_SMC_REG_ERROR, or
> + *     INTEL_SIP_SMC_RETURN_UNKNOWN_FUNCTION
> + * a1: Value in the register
> + * a2-3: not used.
> + */
> +#define INTEL_SIP_SMC_FUNCID_REG_READ 7
> +#define INTEL_SIP_SMC_REG_READ \
> +	INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_REG_READ)
> +
> +/*
> + * Request INTEL_SIP_SMC_REG_WRITE
> + *
> + * Write a protected register using SMCCC
> + *
> + * Call register usage:
> + * a0: INTEL_SIP_SMC_REG_WRITE.
> + * a1: register address
> + * a2: value to program into register.
> + * a3-7: not used.
> + *
> + * Return status:
> + * a0: INTEL_SIP_SMC_STATUS_OK, INTEL_SIP_SMC_REG_ERROR, or
> + *     INTEL_SIP_SMC_RETURN_UNKNOWN_FUNCTION
> + * a1-3: not used.
> + */
> +#define INTEL_SIP_SMC_FUNCID_REG_WRITE 8
> +#define INTEL_SIP_SMC_REG_WRITE \
> +	INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_REG_WRITE)
> +
> +#else
> +static inline struct regmap *altr_sysmgr_node_to_regmap(struct device_node *np)
> +{
> +	return ERR_PTR(-ENOTSUPP);
> +}
> +
> +static inline struct regmap *
> +altr_sysmgr_regmap_lookup_by_compatible(const char *s)
> +{
> +	return ERR_PTR(-ENOTSUPP);
> +}
> +
> +static inline struct regmap *
> +altr_sysmgr_regmap_lookup_by_pdevname(const char *s)
> +{
> +	return ERR_PTR(-ENOTSUPP);
> +}
> +
> +static inline struct regmap *
> +altr_sysmgr_regmap_lookup_by_phandle(struct device_node *np,
> +				     const char *property)
> +{
> +	return ERR_PTR(-ENOTSUPP);
> +}
> +#endif
> +
> +#endif /* __LINUX_MFD_ALTERA_SYSMGR_H__ */

-- 
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

[PATCH 1/4] mfd: altera-sysmgr: Add SOCFPGA System Manager

[Lee Jones]

Arnd,

Would you be so kind as to look at this please?

On Mon, 24 Sep 2018, thor.thayer at linux.intel.com wrote:
> From: Thor Thayer <thor.thayer@linux.intel.com>
> 
> The SOCFPGA System Manager register block aggregates different
> peripheral functions into one area.
> On 32 bit ARM parts, the syscon driver is used for accesses.
> On 64 bit ARM parts, the System Manager can only be accessed by
> EL3 secure mode. Since a SMC call to EL3 is required, this new
> driver uses regmaps similar to syscon to handle the SMC call.
> 
> Since regmaps abstract out the underlying register access, the
> changes to drivers accessing the System Manager are minimal.
> 
> Signed-off-by: Thor Thayer <thor.thayer@linux.intel.com>
> ---
>  MAINTAINERS                       |   6 +
>  drivers/mfd/Kconfig               |   9 ++
>  drivers/mfd/Makefile              |   1 +
>  drivers/mfd/altera-sysmgr.c       | 310 ++++++++++++++++++++++++++++++++++++++
>  include/linux/mfd/altera-sysmgr.h | 113 ++++++++++++++
>  5 files changed, 439 insertions(+)
>  create mode 100644 drivers/mfd/altera-sysmgr.c
>  create mode 100644 include/linux/mfd/altera-sysmgr.h
> 
> diff --git a/MAINTAINERS b/MAINTAINERS
> index d9e6d86488df..bda6b2173cc6 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -692,6 +692,12 @@ L:	linux-gpio at vger.kernel.org
>  S:	Maintained
>  F:	drivers/gpio/gpio-altera.c
>  
> +ALTERA SYSTEM MANAGER DRIVER
> +M:	Thor Thayer <thor.thayer@linux.intel.com>
> +S:	Maintained
> +F:	drivers/mfd/altera-sysmgr.c
> +F:	include/linux/mfd/altera-sysgmr.h
> +
>  ALTERA SYSTEM RESOURCE DRIVER FOR ARRIA10 DEVKIT
>  M:	Thor Thayer <thor.thayer@linux.intel.com>
>  S:	Maintained
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index f3a5f8d02790..1192a25186c7 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -29,6 +29,15 @@ config MFD_ALTERA_A10SR
>  	  accessing the external gpio extender (LEDs & buttons) and
>  	  power supply alarms (hwmon).
>  
> +config MFD_ALTERA_SYSMGR
> +	bool "Altera SOCFPGA System Manager"
> +	depends on (ARCH_SOCFPGA || ARCH_STRATIX10) && OF
> +	select MFD_SYSCON
> +	help
> +	  Select this to get System Manager support for all Altera branded
> +	  SOCFPGAs. The SOCFPGA System Manager handles all SOCFPGAs by
> +	  using syscon for ARM32 parts and SMC calls to EL3 for ARM64 parts.
> +
>  config MFD_ACT8945A
>  	tristate "Active-semi ACT8945A"
>  	select MFD_CORE
> diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> index 5856a9489cbd..bc1508e3ff7b 100644
> --- a/drivers/mfd/Makefile
> +++ b/drivers/mfd/Makefile
> @@ -232,6 +232,7 @@ obj-$(CONFIG_INTEL_SOC_PMIC_CHTDC_TI)	+= intel_soc_pmic_chtdc_ti.o
>  obj-$(CONFIG_MFD_MT6397)	+= mt6397-core.o
>  
>  obj-$(CONFIG_MFD_ALTERA_A10SR)	+= altera-a10sr.o
> +obj-$(CONFIG_MFD_ALTERA_SYSMGR) += altera-sysmgr.o
>  obj-$(CONFIG_MFD_SUN4I_GPADC)	+= sun4i-gpadc.o
>  
>  obj-$(CONFIG_MFD_STM32_LPTIMER)	+= stm32-lptimer.o
> diff --git a/drivers/mfd/altera-sysmgr.c b/drivers/mfd/altera-sysmgr.c
> new file mode 100644
> index 000000000000..29b0bfcb3f69
> --- /dev/null
> +++ b/drivers/mfd/altera-sysmgr.c
> @@ -0,0 +1,310 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + *  Copyright (C) 2017-2018, Intel Corporation.
> + *  Copyright (C) 2012 Freescale Semiconductor, Inc.
> + *  Copyright (C) 2012 Linaro Ltd.
> + *
> + *  Based on syscon driver.
> + */
> +
> +#include <linux/arm-smccc.h>
> +#include <linux/err.h>
> +#include <linux/io.h>
> +#include <linux/mfd/altera-sysmgr.h>
> +#include <linux/mfd/syscon.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/of_address.h>
> +#include <linux/of_platform.h>
> +#include <linux/regmap.h>
> +#include <linux/slab.h>
> +
> +static struct platform_driver sysmgr_driver;
> +
> +/**
> + * struct altr_sysmgr - Altera SOCFPGA System Manager
> + * @regmap: the regmap used for System Manager accesses.
> + * @base  : the base address for the System Manager
> + */
> +struct altr_sysmgr {
> +	struct regmap *regmap;
> +	void __iomem  *base;
> +};
> +
> +/**
> + * Only 1 instance of System Manager is needed but many
> + * consumers will want to access it with the matching
> + * functions below.
> + */
> +static struct altr_sysmgr *p_sysmgr;
> +
> +/**
> + * s10_protected_reg_write
> + * Write to a protected SMC register.
> + * @base: Base address of System Manager
> + * @reg:  Address offset of register
> + * @val:  Value to write
> + * Return: INTEL_SIP_SMC_STATUS_OK (0) on success
> + *	   INTEL_SIP_SMC_REG_ERROR on error
> + *	   INTEL_SIP_SMC_RETURN_UNKNOWN_FUNCTION if not supported
> + */
> +static int s10_protected_reg_write(void __iomem *base,
> +				   unsigned int reg, unsigned int val)
> +{
> +	struct arm_smccc_res result;
> +	unsigned long sysmgr_base = (unsigned long)base;
> +
> +	arm_smccc_smc(INTEL_SIP_SMC_REG_WRITE, sysmgr_base + reg,
> +		      val, 0, 0, 0, 0, 0, &result);
> +
> +	return (int)result.a0;
> +}
> +
> +/**
> + * s10_protected_reg_read
> + * Read the status of a protected SMC register
> + * @base: Base address of System Manager.
> + * @reg:  Address of register
> + * @val:  Value read.
> + * Return: INTEL_SIP_SMC_STATUS_OK (0) on success
> + *	   INTEL_SIP_SMC_REG_ERROR on error
> + *	   INTEL_SIP_SMC_RETURN_UNKNOWN_FUNCTION if not supported
> + */
> +static int s10_protected_reg_read(void __iomem *base,
> +				  unsigned int reg, unsigned int *val)
> +{
> +	struct arm_smccc_res result;
> +	unsigned long sysmgr_base = (unsigned long)base;
> +
> +	arm_smccc_smc(INTEL_SIP_SMC_REG_READ, sysmgr_base + reg,
> +		      0, 0, 0, 0, 0, 0, &result);
> +
> +	*val = (unsigned int)result.a1;
> +
> +	return (int)result.a0;
> +}
> +
> +static const struct regmap_config s10_sysmgr_regmap_cfg = {
> +	.name = "s10_sysmgr",
> +	.reg_bits = 32,
> +	.reg_stride = 4,
> +	.val_bits = 32,
> +	.reg_read = s10_protected_reg_read,
> +	.reg_write = s10_protected_reg_write,
> +	.fast_io = true,
> +	.use_single_rw = true,
> +};
> +
> +/**
> + * socfpga_is_s10
> + * Determine if running on Stratix10 platform.
> + * Return: True if running Stratix10, otherwise false.
> + */
> +static int socfpga_is_s10(void)
> +{
> +	return of_machine_is_compatible("altr,socfpga-stratix10");
> +}
> +
> +/**
> + * of_sysmgr_register
> + * Create and register the Altera System Manager regmap.
> + * Return: Pointer to new sysmgr on success.
> + *         Pointer error on failure.
> + */
> +static struct altr_sysmgr *of_sysmgr_register(struct device_node *np)
> +{
> +	struct altr_sysmgr *sysmgr;
> +	struct regmap *regmap;
> +	u32 reg_io_width;
> +	int ret;
> +	struct regmap_config sysmgr_config = s10_sysmgr_regmap_cfg;
> +	struct resource res;
> +
> +	if (!of_device_is_compatible(np, "altr,sys-mgr"))
> +		return ERR_PTR(-EINVAL);
> +
> +	sysmgr = kzalloc(sizeof(*sysmgr), GFP_KERNEL);
> +	if (!sysmgr)
> +		return ERR_PTR(-ENOMEM);
> +
> +	if (of_address_to_resource(np, 0, &res)) {
> +		ret = -ENOMEM;
> +		goto err_map;
> +	}
> +
> +	/* Need physical address for SMCC call */
> +	sysmgr->base = (void __iomem *)res.start;
> +
> +	/*
> +	 * search for reg-io-width property in DT. If it is not provided,
> +	 * default to 4 bytes. regmap_init will return an error if values
> +	 * are invalid so there is no need to check them here.
> +	 */
> +	ret = of_property_read_u32(np, "reg-io-width", &reg_io_width);
> +	if (ret)
> +		reg_io_width = 4;
> +
> +	sysmgr_config.reg_stride = reg_io_width;
> +	sysmgr_config.val_bits = reg_io_width * 8;
> +	sysmgr_config.max_register = resource_size(&res) - reg_io_width;
> +
> +	regmap = regmap_init(NULL, NULL, sysmgr->base, &sysmgr_config);
> +	if (IS_ERR(regmap)) {
> +		pr_err("regmap init failed\n");
> +		ret = PTR_ERR(regmap);
> +		goto err_map;
> +	}
> +
> +	sysmgr->regmap = regmap;
> +
> +	p_sysmgr = sysmgr;
> +
> +	return sysmgr;
> +
> +err_map:
> +	kfree(sysmgr);
> +	return ERR_PTR(ret);
> +}
> +
> +struct regmap *altr_sysmgr_node_to_regmap(struct device_node *np)
> +{
> +	struct altr_sysmgr *sysmgr = NULL;
> +
> +	if (!socfpga_is_s10())
> +		return syscon_node_to_regmap(np);
> +
> +	if (!p_sysmgr)
> +		sysmgr = of_sysmgr_register(np);
> +	else
> +		sysmgr = p_sysmgr;
> +
> +	if (IS_ERR_OR_NULL(sysmgr))
> +		return ERR_CAST(sysmgr);
> +
> +	return sysmgr->regmap;
> +}
> +EXPORT_SYMBOL_GPL(altr_sysmgr_node_to_regmap);
> +
> +struct regmap *altr_sysmgr_regmap_lookup_by_compatible(const char *s)
> +{
> +	struct device_node *sysmgr_np;
> +	struct regmap *regmap;
> +
> +	if (!socfpga_is_s10())
> +		return syscon_regmap_lookup_by_compatible(s);
> +
> +	sysmgr_np = of_find_compatible_node(NULL, NULL, s);
> +	if (!sysmgr_np)
> +		return ERR_PTR(-ENODEV);
> +
> +	regmap = altr_sysmgr_node_to_regmap(sysmgr_np);
> +	of_node_put(sysmgr_np);
> +
> +	return regmap;
> +}
> +EXPORT_SYMBOL_GPL(altr_sysmgr_regmap_lookup_by_compatible);
> +
> +static int sysmgr_match_pdevname(struct device *dev, void *data)
> +{
> +	return !strcmp(dev_name(dev), (const char *)data);
> +}
> +
> +struct regmap *altr_sysmgr_regmap_lookup_by_pdevname(const char *s)
> +{
> +	struct device *dev;
> +	struct altr_sysmgr *sysmgr;
> +
> +	if (!socfpga_is_s10())
> +		return syscon_regmap_lookup_by_pdevname(s);
> +
> +	dev = driver_find_device(&sysmgr_driver.driver, NULL, (void *)s,
> +				 sysmgr_match_pdevname);
> +	if (!dev)
> +		return ERR_PTR(-EPROBE_DEFER);
> +
> +	sysmgr = dev_get_drvdata(dev);
> +
> +	return sysmgr->regmap;
> +}
> +EXPORT_SYMBOL_GPL(altr_sysmgr_regmap_lookup_by_pdevname);
> +
> +struct regmap *altr_sysmgr_regmap_lookup_by_phandle(struct device_node *np,
> +						    const char *property)
> +{
> +	struct device_node *sysmgr_np;
> +	struct regmap *regmap;
> +
> +	if (!socfpga_is_s10())
> +		return syscon_regmap_lookup_by_phandle(np, property);
> +
> +	if (property)
> +		sysmgr_np = of_parse_phandle(np, property, 0);
> +	else
> +		sysmgr_np = np;
> +
> +	if (!sysmgr_np)
> +		return ERR_PTR(-ENODEV);
> +
> +	regmap = altr_sysmgr_node_to_regmap(sysmgr_np);
> +	of_node_put(sysmgr_np);
> +
> +	return regmap;
> +}
> +EXPORT_SYMBOL_GPL(altr_sysmgr_regmap_lookup_by_phandle);
> +
> +static int sysmgr_probe(struct platform_device *pdev)
> +{
> +	struct device *dev = &pdev->dev;
> +	struct altr_sysmgr *sysmgr;
> +	struct resource *res;
> +
> +	if (!socfpga_is_s10())
> +		return -ENODEV;
> +
> +	/* Skip Initialization if already created */
> +	if (p_sysmgr)
> +		goto finish;
> +
> +	sysmgr = of_sysmgr_register(pdev->dev.of_node);
> +	if (IS_ERR_OR_NULL(sysmgr)) {
> +		dev_err(dev, "regmap init failed\n");
> +		return -ENODEV;
> +	}
> +
> +finish:
> +	platform_set_drvdata(pdev, p_sysmgr);
> +
> +	dev_dbg(dev, "regmap %pR registered\n", res);
> +
> +	return 0;
> +}
> +
> +static const struct of_device_id altr_sysmgr_of_match[] = {
> +	{ .compatible = "altr,sys-mgr" },
> +	{},
> +};
> +MODULE_DEVICE_TABLE(of, altr_sysmgr_of_match);
> +
> +static struct platform_driver altr_sysmgr_driver = {
> +	.probe =  sysmgr_probe,
> +	.driver = {
> +		.name = "altr,system_manager",
> +		.of_match_table = altr_sysmgr_of_match,
> +	},
> +};
> +
> +static int __init altr_sysmgr_init(void)
> +{
> +	return platform_driver_register(&altr_sysmgr_driver);
> +}
> +core_initcall(altr_sysmgr_init);
> +
> +static void __exit altr_sysmgr_exit(void)
> +{
> +	platform_driver_unregister(&altr_sysmgr_driver);
> +}
> +module_exit(altr_sysmgr_exit);
> +
> +MODULE_AUTHOR("Thor Thayer <>");
> +MODULE_DESCRIPTION("SOCFPGA System Manager driver");
> +MODULE_LICENSE("GPL v2");
> diff --git a/include/linux/mfd/altera-sysmgr.h b/include/linux/mfd/altera-sysmgr.h
> new file mode 100644
> index 000000000000..b82116706319
> --- /dev/null
> +++ b/include/linux/mfd/altera-sysmgr.h
> @@ -0,0 +1,113 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Copyright (C) 2018 Intel Corporation
> + * Copyright (C) 2012 Freescale Semiconductor, Inc.
> + * Copyright (C) 2012 Linaro Ltd.
> + */
> +
> +#ifndef __LINUX_MFD_ALTERA_SYSMGR_H__
> +#define __LINUX_MFD_ALTERA_SYSMGR_H__
> +
> +#include <linux/err.h>
> +#include <linux/errno.h>
> +
> +struct device_node;
> +
> +#ifdef CONFIG_MFD_ALTERA_SYSMGR
> +struct regmap *altr_sysmgr_node_to_regmap(struct device_node *np);
> +struct regmap *altr_sysmgr_regmap_lookup_by_compatible(const char *s);
> +struct regmap *altr_sysmgr_regmap_lookup_by_pdevname(const char *s);
> +struct regmap *altr_sysmgr_regmap_lookup_by_phandle(struct device_node *np,
> +						    const char *property);
> +
> +/*
> + * Functions specified by ARM SMC Calling convention:
> + *
> + * FAST call executes atomic operations, returns when the requested operation
> + * has completed.
> + * STD call starts a operation which can be preempted by a non-secure
> + * interrupt.
> + *
> + * a0..a7 is used as register names in the descriptions below, on arm32
> + * that translates to r0..r7 and on arm64 to w0..w7.
> + */
> +
> +#define INTEL_SIP_SMC_STD_CALL_VAL(func_num) \
> +	ARM_SMCCC_CALL_VAL(ARM_SMCCC_STD_CALL, ARM_SMCCC_SMC_64, \
> +	ARM_SMCCC_OWNER_SIP, (func_num))
> +
> +#define INTEL_SIP_SMC_FAST_CALL_VAL(func_num) \
> +	ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, ARM_SMCCC_SMC_64, \
> +	ARM_SMCCC_OWNER_SIP, (func_num))
> +
> +#define INTEL_SIP_SMC_RETURN_UNKNOWN_FUNCTION		0xFFFFFFFF
> +#define INTEL_SIP_SMC_STATUS_OK				0x0
> +#define INTEL_SIP_SMC_REG_ERROR				0x5
> +
> +/*
> + * Request INTEL_SIP_SMC_REG_READ
> + *
> + * Read a protected register using SMCCC
> + *
> + * Call register usage:
> + * a0: INTEL_SIP_SMC_REG_READ.
> + * a1: register address.
> + * a2-7: not used.
> + *
> + * Return status:
> + * a0: INTEL_SIP_SMC_STATUS_OK, INTEL_SIP_SMC_REG_ERROR, or
> + *     INTEL_SIP_SMC_RETURN_UNKNOWN_FUNCTION
> + * a1: Value in the register
> + * a2-3: not used.
> + */
> +#define INTEL_SIP_SMC_FUNCID_REG_READ 7
> +#define INTEL_SIP_SMC_REG_READ \
> +	INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_REG_READ)
> +
> +/*
> + * Request INTEL_SIP_SMC_REG_WRITE
> + *
> + * Write a protected register using SMCCC
> + *
> + * Call register usage:
> + * a0: INTEL_SIP_SMC_REG_WRITE.
> + * a1: register address
> + * a2: value to program into register.
> + * a3-7: not used.
> + *
> + * Return status:
> + * a0: INTEL_SIP_SMC_STATUS_OK, INTEL_SIP_SMC_REG_ERROR, or
> + *     INTEL_SIP_SMC_RETURN_UNKNOWN_FUNCTION
> + * a1-3: not used.
> + */
> +#define INTEL_SIP_SMC_FUNCID_REG_WRITE 8
> +#define INTEL_SIP_SMC_REG_WRITE \
> +	INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_REG_WRITE)
> +
> +#else
> +static inline struct regmap *altr_sysmgr_node_to_regmap(struct device_node *np)
> +{
> +	return ERR_PTR(-ENOTSUPP);
> +}
> +
> +static inline struct regmap *
> +altr_sysmgr_regmap_lookup_by_compatible(const char *s)
> +{
> +	return ERR_PTR(-ENOTSUPP);
> +}
> +
> +static inline struct regmap *
> +altr_sysmgr_regmap_lookup_by_pdevname(const char *s)
> +{
> +	return ERR_PTR(-ENOTSUPP);
> +}
> +
> +static inline struct regmap *
> +altr_sysmgr_regmap_lookup_by_phandle(struct device_node *np,
> +				     const char *property)
> +{
> +	return ERR_PTR(-ENOTSUPP);
> +}
> +#endif
> +
> +#endif /* __LINUX_MFD_ALTERA_SYSMGR_H__ */

-- 
Lee Jones [???]
Linaro Services Technical Lead
Linaro.org ? Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

Re: [PATCH 0/4] Add SOCFPGA System Manager

[Thor Thayer]

Hi

On 10/19/18 1:16 AM, Lee Jones wrote:
> On Wed, 17 Oct 2018, Thor Thayer wrote:
> 
> 
>> On 10/10/2018 09:42 AM, Thor Thayer wrote:
>>> Hi
>>> On 09/24/2018 05:09 PM, thor.thayer@linux.intel.com wrote:
>>>> From: Thor Thayer <thor.thayer@linux.intel.com>
>>>>
>>>> Add MFD driver for ARM64 SOCFPGA System Manager to steer
>>>> System Manager calls appropriately.
>>>> The SOCFPGA System Manager includes registers from several
>>>> SOC peripherals.
>>>>
>>>> On ARM32, syscon handles this aggregated register grouping.
>>>> Redirect System Manager calls to syscon for ARM32 SOCFPGA
>>>> systems.
>>>>
>>>> The ARM64 System Manager can only be accessed from priority
>>>> level EL3 so this new MFD driver handles the calls to EL3.
>>>>
>>>> Thor Thayer (4):
>>>>     mfd: altera-sysmgr: Add SOCFPGA System Manager abstraction
>>>>     ARM: socfpga_defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR
>>>>     arm64: defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR
>>>>     net: stmmac: socfpga: Convert to shared System Manager driver
>>>>
>>>>    MAINTAINERS                                        |   6 +
>>>>    arch/arm/configs/socfpga_defconfig                 |   1 +
>>>>    arch/arm64/configs/defconfig                       |   1 +
>>>>    drivers/mfd/Kconfig                                |   9 +
>>>>    drivers/mfd/Makefile                               |   1 +
>>>>    drivers/mfd/altera-sysmgr.c                        | 310
>>>> +++++++++++++++++++++
>>>>    .../net/ethernet/stmicro/stmmac/dwmac-socfpga.c    |   4 +-
>>>>    include/linux/mfd/altera-sysmgr.h                  | 113 ++++++++
>>>>    8 files changed, 444 insertions(+), 1 deletion(-)
>>>>    create mode 100644 drivers/mfd/altera-sysmgr.c
>>>>    create mode 100644 include/linux/mfd/altera-sysmgr.h
>>>>
>>> Gentle ping.
>>
>> Gentle ping again...
>>
>> Any comments on this patch series?
> 
> "Please don't send content free pings and please allow a reasonable time
> for review.  People get busy, go on holiday, attend conferences and so
> on so unless there is some reason for urgency (like critical bug fixes)
> please allow at least a couple of weeks for review.  If there have been
> review comments then people may be waiting for those to be addressed.
> Sending content free pings just adds to the mail volume (if they are
> seen at all) and if something has gone wrong you'll have to resend the
> patches anyway so resending with any comments addressed is generally a
> much better approach."
> 
> In this case, the we are too late in the series to have these
> applied.  Maintainers are generally preparing their submissions for
> the merge-window.  The MFD component of this set is marked as "To
> Review" and I will get around to it when time is more abundant.
> 

Gentle ping now that the merge window is over.

I'm not clear on the scolding for content free pings.

Other pings I've seen just reference the patch series summary instead of 
each patch individually. It seems like pings for each patch would add 
more to the mail volume than the summary but perhaps I'm 
misunderstanding something.  I'm happy to ping each patch separately if 
that is preferable.

Series can be found here:
https://patchwork.kernel.org/cover/10612891/

[PATCH 1/4] mfd: altera-sysmgr: Add SOCFPGA System Manager
[PATCH 2/4] ARM: socfpga_defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR
[PATCH 3/4] arm64: defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR
[PATCH 4/4] net: stmmac: socfpga: Use shared System Manager driver

Thanks,

Thor

[PATCH 0/4] Add SOCFPGA System Manager

[Thor Thayer]

Hi

On 10/19/18 1:16 AM, Lee Jones wrote:
> On Wed, 17 Oct 2018, Thor Thayer wrote:
> 
> 
>> On 10/10/2018 09:42 AM, Thor Thayer wrote:
>>> Hi
>>> On 09/24/2018 05:09 PM, thor.thayer at linux.intel.com wrote:
>>>> From: Thor Thayer <thor.thayer@linux.intel.com>
>>>>
>>>> Add MFD driver for ARM64 SOCFPGA System Manager to steer
>>>> System Manager calls appropriately.
>>>> The SOCFPGA System Manager includes registers from several
>>>> SOC peripherals.
>>>>
>>>> On ARM32, syscon handles this aggregated register grouping.
>>>> Redirect System Manager calls to syscon for ARM32 SOCFPGA
>>>> systems.
>>>>
>>>> The ARM64 System Manager can only be accessed from priority
>>>> level EL3 so this new MFD driver handles the calls to EL3.
>>>>
>>>> Thor Thayer (4):
>>>>  ?? mfd: altera-sysmgr: Add SOCFPGA System Manager abstraction
>>>>  ?? ARM: socfpga_defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR
>>>>  ?? arm64: defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR
>>>>  ?? net: stmmac: socfpga: Convert to shared System Manager driver
>>>>
>>>>  ? MAINTAINERS??????????????????????????????????????? |?? 6 +
>>>>  ? arch/arm/configs/socfpga_defconfig???????????????? |?? 1 +
>>>>  ? arch/arm64/configs/defconfig?????????????????????? |?? 1 +
>>>>  ? drivers/mfd/Kconfig??????????????????????????????? |?? 9 +
>>>>  ? drivers/mfd/Makefile?????????????????????????????? |?? 1 +
>>>>  ? drivers/mfd/altera-sysmgr.c??????????????????????? | 310
>>>> +++++++++++++++++++++
>>>>  ? .../net/ethernet/stmicro/stmmac/dwmac-socfpga.c??? |?? 4 +-
>>>>  ? include/linux/mfd/altera-sysmgr.h????????????????? | 113 ++++++++
>>>>  ? 8 files changed, 444 insertions(+), 1 deletion(-)
>>>>  ? create mode 100644 drivers/mfd/altera-sysmgr.c
>>>>  ? create mode 100644 include/linux/mfd/altera-sysmgr.h
>>>>
>>> Gentle ping.
>>
>> Gentle ping again...
>>
>> Any comments on this patch series?
> 
> "Please don't send content free pings and please allow a reasonable time
> for review.  People get busy, go on holiday, attend conferences and so
> on so unless there is some reason for urgency (like critical bug fixes)
> please allow at least a couple of weeks for review.  If there have been
> review comments then people may be waiting for those to be addressed.
> Sending content free pings just adds to the mail volume (if they are
> seen at all) and if something has gone wrong you'll have to resend the
> patches anyway so resending with any comments addressed is generally a
> much better approach."
> 
> In this case, the we are too late in the series to have these
> applied.  Maintainers are generally preparing their submissions for
> the merge-window.  The MFD component of this set is marked as "To
> Review" and I will get around to it when time is more abundant.
> 

Gentle ping now that the merge window is over.

I'm not clear on the scolding for content free pings.

Other pings I've seen just reference the patch series summary instead of 
each patch individually. It seems like pings for each patch would add 
more to the mail volume than the summary but perhaps I'm 
misunderstanding something.  I'm happy to ping each patch separately if 
that is preferable.

Series can be found here:
https://patchwork.kernel.org/cover/10612891/

[PATCH 1/4] mfd: altera-sysmgr: Add SOCFPGA System Manager
[PATCH 2/4] ARM: socfpga_defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR
[PATCH 3/4] arm64: defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR
[PATCH 4/4] net: stmmac: socfpga: Use shared System Manager driver

Thanks,

Thor

Re: [PATCH 0/4] Add SOCFPGA System Manager

[Lee Jones]

On Fri, 09 Nov 2018, Thor Thayer wrote:

> Hi
> 
> On 10/19/18 1:16 AM, Lee Jones wrote:
> > On Wed, 17 Oct 2018, Thor Thayer wrote:
> > 
> > 
> > > On 10/10/2018 09:42 AM, Thor Thayer wrote:
> > > > Hi
> > > > On 09/24/2018 05:09 PM, thor.thayer@linux.intel.com wrote:
> > > > > From: Thor Thayer <thor.thayer@linux.intel.com>
> > > > > 
> > > > > Add MFD driver for ARM64 SOCFPGA System Manager to steer
> > > > > System Manager calls appropriately.
> > > > > The SOCFPGA System Manager includes registers from several
> > > > > SOC peripherals.
> > > > > 
> > > > > On ARM32, syscon handles this aggregated register grouping.
> > > > > Redirect System Manager calls to syscon for ARM32 SOCFPGA
> > > > > systems.
> > > > > 
> > > > > The ARM64 System Manager can only be accessed from priority
> > > > > level EL3 so this new MFD driver handles the calls to EL3.
> > > > > 
> > > > > Thor Thayer (4):
> > > > >     mfd: altera-sysmgr: Add SOCFPGA System Manager abstraction
> > > > >     ARM: socfpga_defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR
> > > > >     arm64: defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR
> > > > >     net: stmmac: socfpga: Convert to shared System Manager driver
> > > > > 
> > > > >    MAINTAINERS                                        |   6 +
> > > > >    arch/arm/configs/socfpga_defconfig                 |   1 +
> > > > >    arch/arm64/configs/defconfig                       |   1 +
> > > > >    drivers/mfd/Kconfig                                |   9 +
> > > > >    drivers/mfd/Makefile                               |   1 +
> > > > >    drivers/mfd/altera-sysmgr.c                        | 310
> > > > > +++++++++++++++++++++
> > > > >    .../net/ethernet/stmicro/stmmac/dwmac-socfpga.c    |   4 +-
> > > > >    include/linux/mfd/altera-sysmgr.h                  | 113 ++++++++
> > > > >    8 files changed, 444 insertions(+), 1 deletion(-)
> > > > >    create mode 100644 drivers/mfd/altera-sysmgr.c
> > > > >    create mode 100644 include/linux/mfd/altera-sysmgr.h
> > > > > 
> > > > Gentle ping.
> > > 
> > > Gentle ping again...
> > > 
> > > Any comments on this patch series?
> > 
> > "Please don't send content free pings and please allow a reasonable time
> > for review.  People get busy, go on holiday, attend conferences and so
> > on so unless there is some reason for urgency (like critical bug fixes)
> > please allow at least a couple of weeks for review.  If there have been
> > review comments then people may be waiting for those to be addressed.
> > Sending content free pings just adds to the mail volume (if they are
> > seen at all) and if something has gone wrong you'll have to resend the
> > patches anyway so resending with any comments addressed is generally a
> > much better approach."
> > 
> > In this case, the we are too late in the series to have these
> > applied.  Maintainers are generally preparing their submissions for
> > the merge-window.  The MFD component of this set is marked as "To
> > Review" and I will get around to it when time is more abundant.
> > 
> 
> Gentle ping now that the merge window is over.
> 
> I'm not clear on the scolding for content free pings.
> 
> Other pings I've seen just reference the patch series summary instead of
> each patch individually. It seems like pings for each patch would add more
> to the mail volume than the summary but perhaps I'm misunderstanding
> something.  I'm happy to ping each patch separately if that is preferable.

Please don't ping at all.  If you would like to attract attention,
please resend your patch-set with s/[PATCH]/[RESEND]/.

> Series can be found here:
> https://patchwork.kernel.org/cover/10612891/
> 
> [PATCH 1/4] mfd: altera-sysmgr: Add SOCFPGA System Manager
> [PATCH 2/4] ARM: socfpga_defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR
> [PATCH 3/4] arm64: defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR
> [PATCH 4/4] net: stmmac: socfpga: Use shared System Manager driver
> 
> Thanks,
> 
> Thor

-- 
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

[PATCH 0/4] Add SOCFPGA System Manager

[Lee Jones]

On Fri, 09 Nov 2018, Thor Thayer wrote:

> Hi
> 
> On 10/19/18 1:16 AM, Lee Jones wrote:
> > On Wed, 17 Oct 2018, Thor Thayer wrote:
> > 
> > 
> > > On 10/10/2018 09:42 AM, Thor Thayer wrote:
> > > > Hi
> > > > On 09/24/2018 05:09 PM, thor.thayer at linux.intel.com wrote:
> > > > > From: Thor Thayer <thor.thayer@linux.intel.com>
> > > > > 
> > > > > Add MFD driver for ARM64 SOCFPGA System Manager to steer
> > > > > System Manager calls appropriately.
> > > > > The SOCFPGA System Manager includes registers from several
> > > > > SOC peripherals.
> > > > > 
> > > > > On ARM32, syscon handles this aggregated register grouping.
> > > > > Redirect System Manager calls to syscon for ARM32 SOCFPGA
> > > > > systems.
> > > > > 
> > > > > The ARM64 System Manager can only be accessed from priority
> > > > > level EL3 so this new MFD driver handles the calls to EL3.
> > > > > 
> > > > > Thor Thayer (4):
> > > > >  ?? mfd: altera-sysmgr: Add SOCFPGA System Manager abstraction
> > > > >  ?? ARM: socfpga_defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR
> > > > >  ?? arm64: defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR
> > > > >  ?? net: stmmac: socfpga: Convert to shared System Manager driver
> > > > > 
> > > > >  ? MAINTAINERS??????????????????????????????????????? |?? 6 +
> > > > >  ? arch/arm/configs/socfpga_defconfig???????????????? |?? 1 +
> > > > >  ? arch/arm64/configs/defconfig?????????????????????? |?? 1 +
> > > > >  ? drivers/mfd/Kconfig??????????????????????????????? |?? 9 +
> > > > >  ? drivers/mfd/Makefile?????????????????????????????? |?? 1 +
> > > > >  ? drivers/mfd/altera-sysmgr.c??????????????????????? | 310
> > > > > +++++++++++++++++++++
> > > > >  ? .../net/ethernet/stmicro/stmmac/dwmac-socfpga.c??? |?? 4 +-
> > > > >  ? include/linux/mfd/altera-sysmgr.h????????????????? | 113 ++++++++
> > > > >  ? 8 files changed, 444 insertions(+), 1 deletion(-)
> > > > >  ? create mode 100644 drivers/mfd/altera-sysmgr.c
> > > > >  ? create mode 100644 include/linux/mfd/altera-sysmgr.h
> > > > > 
> > > > Gentle ping.
> > > 
> > > Gentle ping again...
> > > 
> > > Any comments on this patch series?
> > 
> > "Please don't send content free pings and please allow a reasonable time
> > for review.  People get busy, go on holiday, attend conferences and so
> > on so unless there is some reason for urgency (like critical bug fixes)
> > please allow at least a couple of weeks for review.  If there have been
> > review comments then people may be waiting for those to be addressed.
> > Sending content free pings just adds to the mail volume (if they are
> > seen at all) and if something has gone wrong you'll have to resend the
> > patches anyway so resending with any comments addressed is generally a
> > much better approach."
> > 
> > In this case, the we are too late in the series to have these
> > applied.  Maintainers are generally preparing their submissions for
> > the merge-window.  The MFD component of this set is marked as "To
> > Review" and I will get around to it when time is more abundant.
> > 
> 
> Gentle ping now that the merge window is over.
> 
> I'm not clear on the scolding for content free pings.
> 
> Other pings I've seen just reference the patch series summary instead of
> each patch individually. It seems like pings for each patch would add more
> to the mail volume than the summary but perhaps I'm misunderstanding
> something.  I'm happy to ping each patch separately if that is preferable.

Please don't ping at all.  If you would like to attract attention,
please resend your patch-set with s/[PATCH]/[RESEND]/.

> Series can be found here:
> https://patchwork.kernel.org/cover/10612891/
> 
> [PATCH 1/4] mfd: altera-sysmgr: Add SOCFPGA System Manager
> [PATCH 2/4] ARM: socfpga_defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR
> [PATCH 3/4] arm64: defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR
> [PATCH 4/4] net: stmmac: socfpga: Use shared System Manager driver
> 
> Thanks,
> 
> Thor

-- 
Lee Jones [???]
Linaro Services Technical Lead
Linaro.org ? Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog