Merge branch 'acpi-init'

* acpi-init:
  clocksource: cosmetic: Drop OF 'dependency' from symbols
  clocksource / arm_arch_timer: Convert to ACPI probing
  clocksource: Add new CLKSRC_{PROBE,ACPI} config symbols
  clocksource / ACPI: Add probing infrastructure for ACPI-based clocksources
  irqchip / GIC: Convert the GIC driver to ACPI probing
  irqchip / ACPI: Add probing infrastructure for ACPI-based irqchips
  ACPI: Add early device probing infrastructure

7 files changed, 92 insertions, 48 deletions

diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index f834b8c..daf9fc8 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -1913,3 +1913,42 @@ int __init acpi_scan_init(void)
 	mutex_unlock(&acpi_scan_lock);
 	return result;
 }
+
+static struct acpi_probe_entry *ape;
+static int acpi_probe_count;
+static DEFINE_SPINLOCK(acpi_probe_lock);
+
+static int __init acpi_match_madt(struct acpi_subtable_header *header,
+				  const unsigned long end)
+{
+	if (!ape->subtable_valid || ape->subtable_valid(header, ape))
+		if (!ape->probe_subtbl(header, end))
+			acpi_probe_count++;
+
+	return 0;
+}
+
+int __init __acpi_probe_device_table(struct acpi_probe_entry *ap_head, int nr)
+{
+	int count = 0;
+
+	if (acpi_disabled)
+		return 0;
+
+	spin_lock(&acpi_probe_lock);
+	for (ape = ap_head; nr; ape++, nr--) {
+		if (ACPI_COMPARE_NAME(ACPI_SIG_MADT, ape->id)) {
+			acpi_probe_count = 0;
+			acpi_table_parse_madt(ape->type, acpi_match_madt, 0);
+			count += acpi_probe_count;
+		} else {
+			int res;
+			res = acpi_table_parse(ape->id, ape->probe_table);
+			if (!res)
+				count++;
+		}
+	}
+	spin_unlock(&acpi_probe_lock);
+
+	return count;
+}
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index a7726db..1a9c5dc 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -2,6 +2,14 @@ menu "Clock Source drivers"
 
 config CLKSRC_OF
 	bool
+	select CLKSRC_PROBE
+
+config CLKSRC_ACPI
+	bool
+	select CLKSRC_PROBE
+
+config CLKSRC_PROBE
+	bool
 
 config CLKSRC_I8253
 	bool
@@ -123,6 +131,7 @@ config CLKSRC_STM32
 config ARM_ARCH_TIMER
 	bool
 	select CLKSRC_OF if OF
+	select CLKSRC_ACPI if ACPI
 
 config ARM_ARCH_TIMER_EVTSTREAM
 	bool "Support for ARM architected timer event stream generation"
diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
index 5c00863..51856d5 100644
--- a/drivers/clocksource/Makefile
+++ b/drivers/clocksource/Makefile
@@ -1,4 +1,4 @@
-obj-$(CONFIG_CLKSRC_OF)	+= clksrc-of.o
+obj-$(CONFIG_CLKSRC_PROBE)	+= clksrc-probe.o
 obj-$(CONFIG_ATMEL_PIT)		+= timer-atmel-pit.o
 obj-$(CONFIG_ATMEL_ST)		+= timer-atmel-st.o
 obj-$(CONFIG_ATMEL_TCB_CLKSRC)	+= tcb_clksrc.o
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index d6e3e49..c64d543 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -864,13 +864,5 @@ static int __init arch_timer_acpi_init(struct acpi_table_header *table)
 	arch_timer_init();
 	return 0;
 }
-
-/* Initialize all the generic timers presented in GTDT */
-void __init acpi_generic_timer_init(void)
-{
-	if (acpi_disabled)
-		return;
-
-	acpi_table_parse(ACPI_SIG_GTDT, arch_timer_acpi_init);
-}
+CLOCKSOURCE_ACPI_DECLARE(arch_timer, ACPI_SIG_GTDT, arch_timer_acpi_init);
 #endif
diff --git a/drivers/clocksource/clksrc-of.c b/drivers/clocksource/clksrc-probe.c
index 0093a8e..7cb6c92 100644
--- a/drivers/clocksource/clksrc-of.c
+++ b/drivers/clocksource/clksrc-probe.c
@@ -14,6 +14,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <linux/acpi.h>
 #include <linux/init.h>
 #include <linux/of.h>
 #include <linux/clocksource.h>
@@ -23,7 +24,7 @@ extern struct of_device_id __clksrc_of_table[];
 static const struct of_device_id __clksrc_of_table_sentinel
 	__used __section(__clksrc_of_table_end);
 
-void __init clocksource_of_init(void)
+void __init clocksource_probe(void)
 {
 	struct device_node *np;
 	const struct of_device_id *match;
@@ -38,6 +39,9 @@ void __init clocksource_of_init(void)
 		init_func(np);
 		clocksources++;
 	}
+
+	clocksources += acpi_probe_device_table(clksrc);
+
 	if (!clocksources)
 		pr_crit("%s: no matching clocksources found\n", __func__);
 }
diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c
index 982c09c..d4add30 100644
--- a/drivers/irqchip/irq-gic.c
+++ b/drivers/irqchip/irq-gic.c
@@ -41,7 +41,6 @@
 #include <linux/irqchip.h>
 #include <linux/irqchip/chained_irq.h>
 #include <linux/irqchip/arm-gic.h>
-#include <linux/irqchip/arm-gic-acpi.h>
 
 #include <asm/cputype.h>
 #include <asm/irq.h>
@@ -1195,7 +1194,7 @@ IRQCHIP_DECLARE(msm_qgic2, "qcom,msm-qgic2", gic_of_init);
 #endif
 
 #ifdef CONFIG_ACPI
-static phys_addr_t dist_phy_base, cpu_phy_base __initdata;
+static phys_addr_t cpu_phy_base __initdata;
 
 static int __init
 gic_acpi_parse_madt_cpu(struct acpi_subtable_header *header,
@@ -1223,60 +1222,56 @@ gic_acpi_parse_madt_cpu(struct acpi_subtable_header *header,
 	return 0;
 }
 
-static int __init
-gic_acpi_parse_madt_distributor(struct acpi_subtable_header *header,
-				const unsigned long end)
+/* The things you have to do to just *count* something... */
+static int __init acpi_dummy_func(struct acpi_subtable_header *header,
+				  const unsigned long end)
 {
-	struct acpi_madt_generic_distributor *dist;
+	return 0;
+}
 
-	dist = (struct acpi_madt_generic_distributor *)header;
+static bool __init acpi_gic_redist_is_present(void)
+{
+	return acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_REDISTRIBUTOR,
+				     acpi_dummy_func, 0) > 0;
+}
 
-	if (BAD_MADT_ENTRY(dist, end))
-		return -EINVAL;
+static bool __init gic_validate_dist(struct acpi_subtable_header *header,
+				     struct acpi_probe_entry *ape)
+{
+	struct acpi_madt_generic_distributor *dist;
+	dist = (struct acpi_madt_generic_distributor *)header;
 
-	dist_phy_base = dist->base_address;
-	return 0;
+	return (dist->version == ape->driver_data &&
+		(dist->version != ACPI_MADT_GIC_VERSION_NONE ||
+		 !acpi_gic_redist_is_present()));
 }
 
-int __init
-gic_v2_acpi_init(struct acpi_table_header *table)
+#define ACPI_GICV2_DIST_MEM_SIZE	(SZ_4K)
+#define ACPI_GIC_CPU_IF_MEM_SIZE	(SZ_8K)
+
+static int __init gic_v2_acpi_init(struct acpi_subtable_header *header,
+				   const unsigned long end)
 {
+	struct acpi_madt_generic_distributor *dist;
 	void __iomem *cpu_base, *dist_base;
 	int count;
 
 	/* Collect CPU base addresses */
-	count = acpi_parse_entries(ACPI_SIG_MADT,
-				   sizeof(struct acpi_table_madt),
-				   gic_acpi_parse_madt_cpu, table,
-				   ACPI_MADT_TYPE_GENERIC_INTERRUPT, 0);
+	count = acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_INTERRUPT,
+				      gic_acpi_parse_madt_cpu, 0);
 	if (count <= 0) {
 		pr_err("No valid GICC entries exist\n");
 		return -EINVAL;
 	}
 
-	/*
-	 * Find distributor base address. We expect one distributor entry since
-	 * ACPI 5.1 spec neither support multi-GIC instances nor GIC cascade.
-	 */
-	count = acpi_parse_entries(ACPI_SIG_MADT,
-				   sizeof(struct acpi_table_madt),
-				   gic_acpi_parse_madt_distributor, table,
-				   ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR, 0);
-	if (count <= 0) {
-		pr_err("No valid GICD entries exist\n");
-		return -EINVAL;
-	} else if (count > 1) {
-		pr_err("More than one GICD entry detected\n");
-		return -EINVAL;
-	}
-
 	cpu_base = ioremap(cpu_phy_base, ACPI_GIC_CPU_IF_MEM_SIZE);
 	if (!cpu_base) {
 		pr_err("Unable to map GICC registers\n");
 		return -ENOMEM;
 	}
 
-	dist_base = ioremap(dist_phy_base, ACPI_GICV2_DIST_MEM_SIZE);
+	dist = (struct acpi_madt_generic_distributor *)header;
+	dist_base = ioremap(dist->base_address, ACPI_GICV2_DIST_MEM_SIZE);
 	if (!dist_base) {
 		pr_err("Unable to map GICD registers\n");
 		iounmap(cpu_base);
@@ -1302,4 +1297,10 @@ gic_v2_acpi_init(struct acpi_table_header *table)
 	acpi_irq_model = ACPI_IRQ_MODEL_GIC;
 	return 0;
 }
+IRQCHIP_ACPI_DECLARE(gic_v2, ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR,
+		     gic_validate_dist, ACPI_MADT_GIC_VERSION_V2,
+		     gic_v2_acpi_init);
+IRQCHIP_ACPI_DECLARE(gic_v2_maybe, ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR,
+		     gic_validate_dist, ACPI_MADT_GIC_VERSION_NONE,
+		     gic_v2_acpi_init);
 #endif
diff --git a/drivers/irqchip/irqchip.c b/drivers/irqchip/irqchip.c
index afd1af3..2b35e68 100644
--- a/drivers/irqchip/irqchip.c
+++ b/drivers/irqchip/irqchip.c
@@ -8,7 +8,7 @@
  * warranty of any kind, whether express or implied.
  */
 
-#include <linux/acpi_irq.h>
+#include <linux/acpi.h>
 #include <linux/init.h>
 #include <linux/of_irq.h>
 #include <linux/irqchip.h>
@@ -27,6 +27,5 @@ extern struct of_device_id __irqchip_of_table[];
 void __init irqchip_init(void)
 {
 	of_irq_init(__irqchip_of_table);
-
-	acpi_irq_init();
+	acpi_probe_device_table(irqchip);
 }