Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC driver updates from Olof Johansson:
 "Driver updates for v4.1.  Some of these are for drivers/soc, where we
  find more and more SoC-specific drivers these days.  Some are for
  other driver subsystems where we have received acks from the
  appropriate maintainers.

  The larger parts of this branch are:

   - MediaTek support for their PMIC wrapper interface, a high-level
     interface for talking to the system PMIC over a dedicated I2C
     interface.

   - Qualcomm SCM driver has been moved to drivers/firmware.  It's used
     for CPU up/down and needs to be in a shared location for arm/arm64
     common code.

   - cleanup of ARM-CCI PMU code.

   - another set of cleanusp to the OMAP GPMC code"

* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (43 commits)
  soc/mediatek: Remove unused variables
  clocksource: atmel-st: select MFD_SYSCON
  soc: mediatek: Add PMIC wrapper for MT8135 and MT8173 SoCs
  arm-cci: Fix CCI PMU event validation
  arm-cci: Split the code for PMU vs driver support
  arm-cci: Get rid of secure transactions for PMU driver
  arm-cci: Abstract the CCI400 PMU specific definitions
  arm-cci: Rearrange code for splitting PMU vs driver code
  drivers: cci: reject groups spanning multiple HW PMUs
  ARM: at91: remove useless include
  clocksource: atmel-st: remove mach/hardware dependency
  clocksource: atmel-st: use syscon/regmap
  ARM: at91: time: move the system timer driver to drivers/clocksource
  ARM: at91: properly initialize timer
  ARM: at91: at91rm9200: remove deprecated arm_pm_restart
  watchdog: at91rm9200: implement restart handler
  watchdog: at91rm9200: use the system timer syscon
  mfd: syscon: Add atmel system timer registers definition
  ARM: at91/dt: declare atmel,at91rm9200-st as a syscon
  soc: qcom: gsbi: Add support for ADM CRCI muxing
  ...

4 files changed, 410 insertions, 255 deletions

diff --git a/drivers/bus/Kconfig b/drivers/bus/Kconfig
index cbddbaddb347..a1d4af6df3f5 100644
--- a/drivers/bus/Kconfig
+++ b/drivers/bus/Kconfig
@@ -4,6 +4,41 @@
 
 menu "Bus devices"
 
+config ARM_CCI
+        bool
+
+config ARM_CCI400_COMMON
+        bool
+        select ARM_CCI
+
+config ARM_CCI400_PMU
+        bool "ARM CCI400 PMU support"
+        default y
+        depends on ARM || ARM64
+        depends on HW_PERF_EVENTS
+        select ARM_CCI400_COMMON
+        help
+          Support for PMU events monitoring on the ARM CCI cache coherent
+          interconnect.
+
+          If unsure, say Y
+
+config ARM_CCI400_PORT_CTRL
+        bool
+        depends on ARM && OF && CPU_V7
+        select ARM_CCI400_COMMON
+        help
+          Low level power management driver for CCI400 cache coherent
+          interconnect for ARM platforms.
+
+config ARM_CCN
+        bool "ARM CCN driver support"
+        depends on ARM || ARM64
+        depends on PERF_EVENTS
+        help
+          PMU (perf) driver supporting the ARM CCN (Cache Coherent Network)
+          interconnect.
+
 config BRCMSTB_GISB_ARB
         bool "Broadcom STB GISB bus arbiter"
         depends on ARM || MIPS
@@ -40,15 +75,6 @@ config MVEBU_MBUS
           Driver needed for the MBus configuration on Marvell EBU SoCs
           (Kirkwood, Dove, Orion5x, MV78XX0 and Armada 370/XP).
 
-config OMAP_OCP2SCP
-        tristate "OMAP OCP2SCP DRIVER"
-        depends on ARCH_OMAP2PLUS
-        help
-          Driver to enable ocp2scp module which transforms ocp interface
-          protocol to scp protocol. In OMAP4, USB PHY is connected via
-          OCP2SCP and in OMAP5, both USB PHY and SATA PHY is connected via
-          OCP2SCP.
-
 config OMAP_INTERCONNECT
         tristate "OMAP INTERCONNECT DRIVER"
         depends on ARCH_OMAP2PLUS
@@ -56,20 +82,27 @@ config OMAP_INTERCONNECT
         help
           Driver to enable OMAP interconnect error handling driver.
 
-config ARM_CCI
-        bool "ARM CCI driver support"
-        depends on ARM && OF && CPU_V7
+config OMAP_OCP2SCP
+        tristate "OMAP OCP2SCP DRIVER"
+        depends on ARCH_OMAP2PLUS
         help
-          Driver supporting the CCI cache coherent interconnect for ARM
-          platforms.
+          Driver to enable ocp2scp module which transforms ocp interface
+          protocol to scp protocol. In OMAP4, USB PHY is connected via
+          OCP2SCP and in OMAP5, both USB PHY and SATA PHY is connected via
+          OCP2SCP.
 
-config ARM_CCN
-        bool "ARM CCN driver support"
-        depends on ARM || ARM64
-        depends on PERF_EVENTS
+config SIMPLE_PM_BUS
+        bool "Simple Power-Managed Bus Driver"
+        depends on OF && PM
+        depends on ARCH_SHMOBILE || COMPILE_TEST
         help
-          PMU (perf) driver supporting the ARM CCN (Cache Coherent Network)
-          interconnect.
+          Driver for transparent busses that don't need a real driver, but
+          where the bus controller is part of a PM domain, or under the control
+          of a functional clock, and thus relies on runtime PM for managing
+          this PM domain and/or clock.
+          An example of such a bus controller is the Renesas Bus State
+          Controller (BSC, sometimes called "LBSC within Bus Bridge", or
+          "External Bus Interface") as found on several Renesas ARM SoCs.
 
 config VEXPRESS_CONFIG
         bool "Versatile Express configuration bus"
diff --git a/drivers/bus/Makefile b/drivers/bus/Makefile
index 807dd17ef2f8..790e7b933fb2 100644
--- a/drivers/bus/Makefile
+++ b/drivers/bus/Makefile
@@ -2,17 +2,18 @@
 # Makefile for the bus drivers.
 #
 
+# Interconnect bus drivers for ARM platforms
+obj-$(CONFIG_ARM_CCI)           += arm-cci.o
+obj-$(CONFIG_ARM_CCN)           += arm-ccn.o
+
 obj-$(CONFIG_BRCMSTB_GISB_ARB)  += brcmstb_gisb.o
-obj-$(CONFIG_IMX_WEIM)  += imx-weim.o
-obj-$(CONFIG_MIPS_CDMM) += mips_cdmm.o
-obj-$(CONFIG_MVEBU_MBUS) += mvebu-mbus.o
-obj-$(CONFIG_OMAP_OCP2SCP)      += omap-ocp2scp.o
+obj-$(CONFIG_IMX_WEIM)          += imx-weim.o
+obj-$(CONFIG_MIPS_CDMM)         += mips_cdmm.o
+obj-$(CONFIG_MVEBU_MBUS)        += mvebu-mbus.o
 
 # Interconnect bus driver for OMAP SoCs.
 obj-$(CONFIG_OMAP_INTERCONNECT) += omap_l3_smx.o omap_l3_noc.o
 
-# Interconnect bus drivers for ARM platforms
-obj-$(CONFIG_ARM_CCI)           += arm-cci.o
-obj-$(CONFIG_ARM_CCN)           += arm-ccn.o
-
+obj-$(CONFIG_OMAP_OCP2SCP)      += omap-ocp2scp.o
+obj-$(CONFIG_SIMPLE_PM_BUS)     += simple-pm-bus.o
 obj-$(CONFIG_VEXPRESS_CONFIG)   += vexpress-config.o
diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c
index 84fd66057dad..b854125e4831 100644
--- a/drivers/bus/arm-cci.c
+++ b/drivers/bus/arm-cci.c
@@ -29,41 +29,36 @@
 #include <asm/cacheflush.h>
 #include <asm/smp_plat.h>
 
-#define DRIVER_NAME             "CCI-400"
-#define DRIVER_NAME_PMU         DRIVER_NAME " PMU"
-
-#define CCI_PORT_CTRL           0x0
-#define CCI_CTRL_STATUS         0xc
-
-#define CCI_ENABLE_SNOOP_REQ    0x1
-#define CCI_ENABLE_DVM_REQ      0x2
-#define CCI_ENABLE_REQ          (CCI_ENABLE_SNOOP_REQ | CCI_ENABLE_DVM_REQ)
+static void __iomem *cci_ctrl_base;
+static unsigned long cci_ctrl_phys;
 
+#ifdef CONFIG_ARM_CCI400_PORT_CTRL
 struct cci_nb_ports {
         unsigned int nb_ace;
         unsigned int nb_ace_lite;
 };
 
-enum cci_ace_port_type {
-        ACE_INVALID_PORT = 0x0,
-        ACE_PORT,
-        ACE_LITE_PORT,
+static const struct cci_nb_ports cci400_ports = {
+        .nb_ace = 2,
+        .nb_ace_lite = 3
 };
 
-struct cci_ace_port {
-        void __iomem *base;
-        unsigned long phys;
-        enum cci_ace_port_type type;
-        struct device_node *dn;
-};
+#define CCI400_PORTS_DATA       (&cci400_ports)
+#else
+#define CCI400_PORTS_DATA       (NULL)
+#endif
 
-static struct cci_ace_port *ports;
-static unsigned int nb_cci_ports;
+static const struct of_device_id arm_cci_matches[] = {
+#ifdef CONFIG_ARM_CCI400_COMMON
+        {.compatible = "arm,cci-400", .data = CCI400_PORTS_DATA },
+#endif
+        {},
+};
 
-static void __iomem *cci_ctrl_base;
-static unsigned long cci_ctrl_phys;
+#ifdef CONFIG_ARM_CCI400_PMU
 
-#ifdef CONFIG_HW_PERF_EVENTS
+#define DRIVER_NAME             "CCI-400"
+#define DRIVER_NAME_PMU         DRIVER_NAME " PMU"
 
 #define CCI_PMCR                0x0100
 #define CCI_PID2                0x0fe8
@@ -75,20 +70,6 @@ static unsigned long cci_ctrl_phys;
 #define CCI_PID2_REV_MASK       0xf0
 #define CCI_PID2_REV_SHIFT      4
 
-/* Port ids */
-#define CCI_PORT_S0     0
-#define CCI_PORT_S1     1
-#define CCI_PORT_S2     2
-#define CCI_PORT_S3     3
-#define CCI_PORT_S4     4
-#define CCI_PORT_M0     5
-#define CCI_PORT_M1     6
-#define CCI_PORT_M2     7
-
-#define CCI_REV_R0              0
-#define CCI_REV_R1              1
-#define CCI_REV_R1_PX           5
-
 #define CCI_PMU_EVT_SEL         0x000
 #define CCI_PMU_CNTR            0x004
 #define CCI_PMU_CNTR_CTRL       0x008
@@ -100,76 +81,22 @@ static unsigned long cci_ctrl_phys;
 
 #define CCI_PMU_CNTR_MASK       ((1ULL << 32) -1)
 
-/*
- * Instead of an event id to monitor CCI cycles, a dedicated counter is
- * provided. Use 0xff to represent CCI cycles and hope that no future revisions
- * make use of this event in hardware.
- */
-enum cci400_perf_events {
-        CCI_PMU_CYCLES = 0xff
-};
-
-#define CCI_PMU_EVENT_MASK              0xff
+#define CCI_PMU_EVENT_MASK              0xffUL
 #define CCI_PMU_EVENT_SOURCE(event)     ((event >> 5) & 0x7)
 #define CCI_PMU_EVENT_CODE(event)       (event & 0x1f)
 
 #define CCI_PMU_MAX_HW_EVENTS 5   /* CCI PMU has 4 counters + 1 cycle counter */
 
-#define CCI_PMU_CYCLE_CNTR_IDX          0
-#define CCI_PMU_CNTR0_IDX               1
-#define CCI_PMU_CNTR_LAST(cci_pmu)      (CCI_PMU_CYCLE_CNTR_IDX + cci_pmu->num_events - 1)
-
-/*
- * CCI PMU event id is an 8-bit value made of two parts - bits 7:5 for one of 8
- * ports and bits 4:0 are event codes. There are different event codes
- * associated with each port type.
- *
- * Additionally, the range of events associated with the port types changed
- * between Rev0 and Rev1.
- *
- * The constants below define the range of valid codes for each port type for
- * the different revisions and are used to validate the event to be monitored.
- */
-
-#define CCI_REV_R0_SLAVE_PORT_MIN_EV    0x00
-#define CCI_REV_R0_SLAVE_PORT_MAX_EV    0x13
-#define CCI_REV_R0_MASTER_PORT_MIN_EV   0x14
-#define CCI_REV_R0_MASTER_PORT_MAX_EV   0x1a
-
-#define CCI_REV_R1_SLAVE_PORT_MIN_EV    0x00
-#define CCI_REV_R1_SLAVE_PORT_MAX_EV    0x14
-#define CCI_REV_R1_MASTER_PORT_MIN_EV   0x00
-#define CCI_REV_R1_MASTER_PORT_MAX_EV   0x11
-
-struct pmu_port_event_ranges {
-        u8 slave_min;
-        u8 slave_max;
-        u8 master_min;
-        u8 master_max;
-};
-
-static struct pmu_port_event_ranges port_event_range[] = {
-        [CCI_REV_R0] = {
-                .slave_min = CCI_REV_R0_SLAVE_PORT_MIN_EV,
-                .slave_max = CCI_REV_R0_SLAVE_PORT_MAX_EV,
-                .master_min = CCI_REV_R0_MASTER_PORT_MIN_EV,
-                .master_max = CCI_REV_R0_MASTER_PORT_MAX_EV,
-        },
-        [CCI_REV_R1] = {
-                .slave_min = CCI_REV_R1_SLAVE_PORT_MIN_EV,
-                .slave_max = CCI_REV_R1_SLAVE_PORT_MAX_EV,
-                .master_min = CCI_REV_R1_MASTER_PORT_MIN_EV,
-                .master_max = CCI_REV_R1_MASTER_PORT_MAX_EV,
-        },
+/* Types of interfaces that can generate events */
+enum {
+        CCI_IF_SLAVE,
+        CCI_IF_MASTER,
+        CCI_IF_MAX,
 };
 
-/*
- * Export different PMU names for the different revisions so userspace knows
- * because the event ids are different
- */
-static char *const pmu_names[] = {
-        [CCI_REV_R0] = "CCI_400",
-        [CCI_REV_R1] = "CCI_400_r1",
+struct event_range {
+        u32 min;
+        u32 max;
 };
 
 struct cci_pmu_hw_events {
@@ -178,13 +105,20 @@ struct cci_pmu_hw_events {
         raw_spinlock_t pmu_lock;
 };
 
+struct cci_pmu_model {
+        char *name;
+        struct event_range event_ranges[CCI_IF_MAX];
+};
+
+static struct cci_pmu_model cci_pmu_models[];
+
 struct cci_pmu {
         void __iomem *base;
         struct pmu pmu;
         int nr_irqs;
         int irqs[CCI_PMU_MAX_HW_EVENTS];
         unsigned long active_irqs;
-        struct pmu_port_event_ranges *port_ranges;
+        const struct cci_pmu_model *model;
         struct cci_pmu_hw_events hw_events;
         struct platform_device *plat_device;
         int num_events;
@@ -196,52 +130,63 @@ static struct cci_pmu *pmu;
 
 #define to_cci_pmu(c)   (container_of(c, struct cci_pmu, pmu))
 
-static bool is_duplicate_irq(int irq, int *irqs, int nr_irqs)
-{
-        int i;
-
-        for (i = 0; i < nr_irqs; i++)
-                if (irq == irqs[i])
-                        return true;
-
-        return false;
-}
+/* Port ids */
+#define CCI_PORT_S0     0
+#define CCI_PORT_S1     1
+#define CCI_PORT_S2     2
+#define CCI_PORT_S3     3
+#define CCI_PORT_S4     4
+#define CCI_PORT_M0     5
+#define CCI_PORT_M1     6
+#define CCI_PORT_M2     7
 
-static int probe_cci_revision(void)
-{
-        int rev;
-        rev = readl_relaxed(cci_ctrl_base + CCI_PID2) & CCI_PID2_REV_MASK;
-        rev >>= CCI_PID2_REV_SHIFT;
+#define CCI_REV_R0              0
+#define CCI_REV_R1              1
+#define CCI_REV_R1_PX           5
 
-        if (rev < CCI_REV_R1_PX)
-                return CCI_REV_R0;
-        else
-                return CCI_REV_R1;
-}
+/*
+ * Instead of an event id to monitor CCI cycles, a dedicated counter is
+ * provided. Use 0xff to represent CCI cycles and hope that no future revisions
+ * make use of this event in hardware.
+ */
+enum cci400_perf_events {
+        CCI_PMU_CYCLES = 0xff
+};
 
-static struct pmu_port_event_ranges *port_range_by_rev(void)
-{
-        int rev = probe_cci_revision();
+#define CCI_PMU_CYCLE_CNTR_IDX          0
+#define CCI_PMU_CNTR0_IDX               1
+#define CCI_PMU_CNTR_LAST(cci_pmu)      (CCI_PMU_CYCLE_CNTR_IDX + cci_pmu->num_events - 1)
 
-        return &port_event_range[rev];
-}
+/*
+ * CCI PMU event id is an 8-bit value made of two parts - bits 7:5 for one of 8
+ * ports and bits 4:0 are event codes. There are different event codes
+ * associated with each port type.
+ *
+ * Additionally, the range of events associated with the port types changed
+ * between Rev0 and Rev1.
+ *
+ * The constants below define the range of valid codes for each port type for
+ * the different revisions and are used to validate the event to be monitored.
+ */
 
-static int pmu_is_valid_slave_event(u8 ev_code)
-{
-        return pmu->port_ranges->slave_min <= ev_code &&
-                ev_code <= pmu->port_ranges->slave_max;
-}
+#define CCI_REV_R0_SLAVE_PORT_MIN_EV    0x00
+#define CCI_REV_R0_SLAVE_PORT_MAX_EV    0x13
+#define CCI_REV_R0_MASTER_PORT_MIN_EV   0x14
+#define CCI_REV_R0_MASTER_PORT_MAX_EV   0x1a
 
-static int pmu_is_valid_master_event(u8 ev_code)
-{
-        return pmu->port_ranges->master_min <= ev_code &&
-                ev_code <= pmu->port_ranges->master_max;
-}
+#define CCI_REV_R1_SLAVE_PORT_MIN_EV    0x00
+#define CCI_REV_R1_SLAVE_PORT_MAX_EV    0x14
+#define CCI_REV_R1_MASTER_PORT_MIN_EV   0x00
+#define CCI_REV_R1_MASTER_PORT_MAX_EV   0x11
 
-static int pmu_validate_hw_event(u8 hw_event)
+static int pmu_validate_hw_event(unsigned long hw_event)
 {
         u8 ev_source = CCI_PMU_EVENT_SOURCE(hw_event);
         u8 ev_code = CCI_PMU_EVENT_CODE(hw_event);
+        int if_type;
+
+        if (hw_event & ~CCI_PMU_EVENT_MASK)
+                return -ENOENT;
 
         switch (ev_source) {
         case CCI_PORT_S0:
@@ -250,21 +195,44 @@ static int pmu_validate_hw_event(u8 hw_event)
         case CCI_PORT_S3:
         case CCI_PORT_S4:
                 /* Slave Interface */
-                if (pmu_is_valid_slave_event(ev_code))
-                        return hw_event;
+                if_type = CCI_IF_SLAVE;
                 break;
         case CCI_PORT_M0:
         case CCI_PORT_M1:
         case CCI_PORT_M2:
                 /* Master Interface */
-                if (pmu_is_valid_master_event(ev_code))
-                        return hw_event;
+                if_type = CCI_IF_MASTER;
                 break;
+        default:
+                return -ENOENT;
         }
 
+        if (ev_code >= pmu->model->event_ranges[if_type].min &&
+                ev_code <= pmu->model->event_ranges[if_type].max)
+                return hw_event;
+
         return -ENOENT;
 }
 
+static int probe_cci_revision(void)
+{
+        int rev;
+        rev = readl_relaxed(cci_ctrl_base + CCI_PID2) & CCI_PID2_REV_MASK;
+        rev >>= CCI_PID2_REV_SHIFT;
+
+        if (rev < CCI_REV_R1_PX)
+                return CCI_REV_R0;
+        else
+                return CCI_REV_R1;
+}
+
+static const struct cci_pmu_model *probe_cci_model(struct platform_device *pdev)
+{
+        if (platform_has_secure_cci_access())
+                return &cci_pmu_models[probe_cci_revision()];
+        return NULL;
+}
+
 static int pmu_is_valid_counter(struct cci_pmu *cci_pmu, int idx)
 {
         return CCI_PMU_CYCLE_CNTR_IDX <= idx &&
@@ -293,7 +261,6 @@ static void pmu_enable_counter(int idx)
 
 static void pmu_set_event(int idx, unsigned long event)
 {
-        event &= CCI_PMU_EVENT_MASK;
         pmu_write_register(event, idx, CCI_PMU_EVT_SEL);
 }
 
@@ -310,7 +277,7 @@ static int pmu_get_event_idx(struct cci_pmu_hw_events *hw, struct perf_event *ev
 {
         struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
         struct hw_perf_event *hw_event = &event->hw;
-        unsigned long cci_event = hw_event->config_base & CCI_PMU_EVENT_MASK;
+        unsigned long cci_event = hw_event->config_base;
         int idx;
 
         if (cci_event == CCI_PMU_CYCLES) {
@@ -331,7 +298,7 @@ static int pmu_get_event_idx(struct cci_pmu_hw_events *hw, struct perf_event *ev
 static int pmu_map_event(struct perf_event *event)
 {
         int mapping;
-        u8 config = event->attr.config & CCI_PMU_EVENT_MASK;
+        unsigned long config = event->attr.config;
 
         if (event->attr.type < PERF_TYPE_MAX)
                 return -ENOENT;
@@ -660,12 +627,21 @@ static void cci_pmu_del(struct perf_event *event, int flags)
 }
 
 static int
-validate_event(struct cci_pmu_hw_events *hw_events,
-               struct perf_event *event)
+validate_event(struct pmu *cci_pmu,
+               struct cci_pmu_hw_events *hw_events,
+               struct perf_event *event)
 {
         if (is_software_event(event))
                 return 1;
 
+        /*
+         * Reject groups spanning multiple HW PMUs (e.g. CPU + CCI). The
+         * core perf code won't check that the pmu->ctx == leader->ctx
+         * until after pmu->event_init(event).
+         */
+        if (event->pmu != cci_pmu)
+                return 0;
+
         if (event->state < PERF_EVENT_STATE_OFF)
                 return 1;
 
@@ -687,15 +663,15 @@ validate_group(struct perf_event *event)
                 .used_mask = CPU_BITS_NONE,
         };
 
-        if (!validate_event(&fake_pmu, leader))
+        if (!validate_event(event->pmu, &fake_pmu, leader))
                 return -EINVAL;
 
         list_for_each_entry(sibling, &leader->sibling_list, group_entry) {
-                if (!validate_event(&fake_pmu, sibling))
+                if (!validate_event(event->pmu, &fake_pmu, sibling))
                         return -EINVAL;
         }
 
-        if (!validate_event(&fake_pmu, event))
+        if (!validate_event(event->pmu, &fake_pmu, event))
                 return -EINVAL;
 
         return 0;
@@ -831,9 +807,9 @@ static const struct attribute_group *pmu_attr_groups[] = {
 
 static int cci_pmu_init(struct cci_pmu *cci_pmu, struct platform_device *pdev)
 {
-        char *name = pmu_names[probe_cci_revision()];
+        char *name = cci_pmu->model->name;
         cci_pmu->pmu = (struct pmu) {
-                .name           = pmu_names[probe_cci_revision()],
+                .name           = cci_pmu->model->name,
                 .task_ctx_nr    = perf_invalid_context,
                 .pmu_enable     = cci_pmu_enable,
                 .pmu_disable    = cci_pmu_disable,
@@ -886,22 +862,93 @@ static struct notifier_block cci_pmu_cpu_nb = {
         .priority       = CPU_PRI_PERF + 1,
 };
 
+static struct cci_pmu_model cci_pmu_models[] = {
+        [CCI_REV_R0] = {
+                .name = "CCI_400",
+                .event_ranges = {
+                        [CCI_IF_SLAVE] = {
+                                CCI_REV_R0_SLAVE_PORT_MIN_EV,
+                                CCI_REV_R0_SLAVE_PORT_MAX_EV,
+                        },
+                        [CCI_IF_MASTER] = {
+                                CCI_REV_R0_MASTER_PORT_MIN_EV,
+                                CCI_REV_R0_MASTER_PORT_MAX_EV,
+                        },
+                },
+        },
+        [CCI_REV_R1] = {
+                .name = "CCI_400_r1",
+                .event_ranges = {
+                        [CCI_IF_SLAVE] = {
+                                CCI_REV_R1_SLAVE_PORT_MIN_EV,
+                                CCI_REV_R1_SLAVE_PORT_MAX_EV,
+                        },
+                        [CCI_IF_MASTER] = {
+                                CCI_REV_R1_MASTER_PORT_MIN_EV,
+                                CCI_REV_R1_MASTER_PORT_MAX_EV,
+                        },
+                },
+        },
+};
+
 static const struct of_device_id arm_cci_pmu_matches[] = {
         {
                 .compatible = "arm,cci-400-pmu",
+                .data   = NULL,
+        },
+        {
+                .compatible = "arm,cci-400-pmu,r0",
+                .data   = &cci_pmu_models[CCI_REV_R0],
+        },
+        {
+                .compatible = "arm,cci-400-pmu,r1",
+                .data   = &cci_pmu_models[CCI_REV_R1],
         },
         {},
 };
 
+static inline const struct cci_pmu_model *get_cci_model(struct platform_device *pdev)
+{
+        const struct of_device_id *match = of_match_node(arm_cci_pmu_matches,
+                                                        pdev->dev.of_node);
+        if (!match)
+                return NULL;
+        if (match->data)
+                return match->data;
+
+        dev_warn(&pdev->dev, "DEPRECATED compatible property,"
+                         "requires secure access to CCI registers");
+        return probe_cci_model(pdev);
+}
+
+static bool is_duplicate_irq(int irq, int *irqs, int nr_irqs)
+{
+        int i;
+
+        for (i = 0; i < nr_irqs; i++)
+                if (irq == irqs[i])
+                        return true;
+
+        return false;
+}
+
 static int cci_pmu_probe(struct platform_device *pdev)
 {
         struct resource *res;
         int i, ret, irq;
+        const struct cci_pmu_model *model;
+
+        model = get_cci_model(pdev);
+        if (!model) {
+                dev_warn(&pdev->dev, "CCI PMU version not supported\n");
+                return -ENODEV;
+        }
 
         pmu = devm_kzalloc(&pdev->dev, sizeof(*pmu), GFP_KERNEL);
         if (!pmu)
                 return -ENOMEM;
 
+        pmu->model = model;
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
         pmu->base = devm_ioremap_resource(&pdev->dev, res);
         if (IS_ERR(pmu->base))
@@ -933,12 +980,6 @@ static int cci_pmu_probe(struct platform_device *pdev)
                 return -EINVAL;
         }
 
-        pmu->port_ranges = port_range_by_rev();
-        if (!pmu->port_ranges) {
-                dev_warn(&pdev->dev, "CCI PMU version not supported\n");
-                return -EINVAL;
-        }
-
         raw_spin_lock_init(&pmu->hw_events.pmu_lock);
         mutex_init(&pmu->reserve_mutex);
         atomic_set(&pmu->active_events, 0);
@@ -952,6 +993,7 @@ static int cci_pmu_probe(struct platform_device *pdev)
         if (ret)
                 return ret;
 
+        pr_info("ARM %s PMU driver probed", pmu->model->name);
         return 0;
 }
 
@@ -963,7 +1005,66 @@ static int cci_platform_probe(struct platform_device *pdev)
         return of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
 }
 
-#endif /* CONFIG_HW_PERF_EVENTS */
+static struct platform_driver cci_pmu_driver = {
+        .driver = {
+                   .name = DRIVER_NAME_PMU,
+                   .of_match_table = arm_cci_pmu_matches,
+                  },
+        .probe = cci_pmu_probe,
+};
+
+static struct platform_driver cci_platform_driver = {
+        .driver = {
+                   .name = DRIVER_NAME,
+                   .of_match_table = arm_cci_matches,
+                  },
+        .probe = cci_platform_probe,
+};
+
+static int __init cci_platform_init(void)
+{
+        int ret;
+
+        ret = platform_driver_register(&cci_pmu_driver);
+        if (ret)
+                return ret;
+
+        return platform_driver_register(&cci_platform_driver);
+}
+
+#else /* !CONFIG_ARM_CCI400_PMU */
+
+static int __init cci_platform_init(void)
+{
+        return 0;
+}
+
+#endif /* CONFIG_ARM_CCI400_PMU */
+
+#ifdef CONFIG_ARM_CCI400_PORT_CTRL
+
+#define CCI_PORT_CTRL           0x0
+#define CCI_CTRL_STATUS         0xc
+
+#define CCI_ENABLE_SNOOP_REQ    0x1
+#define CCI_ENABLE_DVM_REQ      0x2
+#define CCI_ENABLE_REQ          (CCI_ENABLE_SNOOP_REQ | CCI_ENABLE_DVM_REQ)
+
+enum cci_ace_port_type {
+        ACE_INVALID_PORT = 0x0,
+        ACE_PORT,
+        ACE_LITE_PORT,
+};
+
+struct cci_ace_port {
+        void __iomem *base;
+        unsigned long phys;
+        enum cci_ace_port_type type;
+        struct device_node *dn;
+};
+
+static struct cci_ace_port *ports;
+static unsigned int nb_cci_ports;
 
 struct cpu_port {
         u64 mpidr;
@@ -1284,36 +1385,20 @@ int notrace __cci_control_port_by_index(u32 port, bool enable)
 }
 EXPORT_SYMBOL_GPL(__cci_control_port_by_index);
 
-static const struct cci_nb_ports cci400_ports = {
-        .nb_ace = 2,
-        .nb_ace_lite = 3
-};
-
-static const struct of_device_id arm_cci_matches[] = {
-        {.compatible = "arm,cci-400", .data = &cci400_ports },
-        {},
-};
-
 static const struct of_device_id arm_cci_ctrl_if_matches[] = {
         {.compatible = "arm,cci-400-ctrl-if", },
         {},
 };
 
-static int cci_probe(void)
+static int cci_probe_ports(struct device_node *np)
 {
         struct cci_nb_ports const *cci_config;
         int ret, i, nb_ace = 0, nb_ace_lite = 0;
-        struct device_node *np, *cp;
+        struct device_node *cp;
         struct resource res;
         const char *match_str;
         bool is_ace;
 
-        np = of_find_matching_node(NULL, arm_cci_matches);
-        if (!np)
-                return -ENODEV;
-
-        if (!of_device_is_available(np))
-                return -ENODEV;
 
         cci_config = of_match_node(arm_cci_matches, np)->data;
         if (!cci_config)
@@ -1325,17 +1410,6 @@ static int cci_probe(void)
         if (!ports)
                 return -ENOMEM;
 
-        ret = of_address_to_resource(np, 0, &res);
-        if (!ret) {
-                cci_ctrl_base = ioremap(res.start, resource_size(&res));
-                cci_ctrl_phys = res.start;
-        }
-        if (ret || !cci_ctrl_base) {
-                WARN(1, "unable to ioremap CCI ctrl\n");
-                ret = -ENXIO;
-                goto memalloc_err;
-        }
-
         for_each_child_of_node(np, cp) {
                 if (!of_match_node(arm_cci_ctrl_if_matches, cp))
                         continue;
@@ -1395,12 +1469,37 @@ static int cci_probe(void)
         sync_cache_w(&cpu_port);
         __sync_cache_range_w(ports, sizeof(*ports) * nb_cci_ports);
         pr_info("ARM CCI driver probed\n");
+
         return 0;
+}
+#else /* !CONFIG_ARM_CCI400_PORT_CTRL */
+static inline int cci_probe_ports(struct device_node *np)
+{
+        return 0;
+}
+#endif /* CONFIG_ARM_CCI400_PORT_CTRL */
 
-memalloc_err:
+static int cci_probe(void)
+{
+        int ret;
+        struct device_node *np;
+        struct resource res;
+
+        np = of_find_matching_node(NULL, arm_cci_matches);
+        if(!np || !of_device_is_available(np))
+                return -ENODEV;
 
-        kfree(ports);
-        return ret;
+        ret = of_address_to_resource(np, 0, &res);
+        if (!ret) {
+                cci_ctrl_base = ioremap(res.start, resource_size(&res));
+                cci_ctrl_phys = res.start;
+        }
+        if (ret || !cci_ctrl_base) {
+                WARN(1, "unable to ioremap CCI ctrl\n");
+                return -ENXIO;
+        }
+
+        return cci_probe_ports(np);
 }
 
 static int cci_init_status = -EAGAIN;
@@ -1418,42 +1517,6 @@ static int cci_init(void)
         return cci_init_status;
 }
 
-#ifdef CONFIG_HW_PERF_EVENTS
-static struct platform_driver cci_pmu_driver = {
-        .driver = {
-                   .name = DRIVER_NAME_PMU,
-                   .of_match_table = arm_cci_pmu_matches,
-                  },
-        .probe = cci_pmu_probe,
-};
-
-static struct platform_driver cci_platform_driver = {
-        .driver = {
-                   .name = DRIVER_NAME,
-                   .of_match_table = arm_cci_matches,
-                  },
-        .probe = cci_platform_probe,
-};
-
-static int __init cci_platform_init(void)
-{
-        int ret;
-
-        ret = platform_driver_register(&cci_pmu_driver);
-        if (ret)
-                return ret;
-
-        return platform_driver_register(&cci_platform_driver);
-}
-
-#else
-
-static int __init cci_platform_init(void)
-{
-        return 0;
-}
-
-#endif
 /*
  * To sort out early init calls ordering a helper function is provided to
  * check if the CCI driver has beed initialized. Function check if the driver
diff --git a/drivers/bus/simple-pm-bus.c b/drivers/bus/simple-pm-bus.c
new file mode 100644
index 000000000000..c5eb46cbf388
--- /dev/null
+++ b/drivers/bus/simple-pm-bus.c
@@ -0,0 +1,58 @@
+/*
+ * Simple Power-Managed Bus Driver
+ *
+ * Copyright (C) 2014-2015 Glider bvba
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+
+
+static int simple_pm_bus_probe(struct platform_device *pdev)
+{
+        struct device_node *np = pdev->dev.of_node;
+
+        dev_dbg(&pdev->dev, "%s\n", __func__);
+
+        pm_runtime_enable(&pdev->dev);
+
+        if (np)
+                of_platform_populate(np, NULL, NULL, &pdev->dev);
+
+        return 0;
+}
+
+static int simple_pm_bus_remove(struct platform_device *pdev)
+{
+        dev_dbg(&pdev->dev, "%s\n", __func__);
+
+        pm_runtime_disable(&pdev->dev);
+        return 0;
+}
+
+static const struct of_device_id simple_pm_bus_of_match[] = {
+        { .compatible = "simple-pm-bus", },
+        { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, simple_pm_bus_of_match);
+
+static struct platform_driver simple_pm_bus_driver = {
+        .probe = simple_pm_bus_probe,
+        .remove = simple_pm_bus_remove,
+        .driver = {
+                .name = "simple-pm-bus",
+                .of_match_table = simple_pm_bus_of_match,
+        },
+};
+
+module_platform_driver(simple_pm_bus_driver);
+
+MODULE_DESCRIPTION("Simple Power-Managed Bus Driver");
+MODULE_AUTHOR("Geert Uytterhoeven <geert+renesas@glider.be>");
+MODULE_LICENSE("GPL v2");