[PATCH v2 00/12] Modular Broadcom irqchip drivers

[PATCH v2 00/12] Modular Broadcom irqchip drivers

[Florian Fainelli]

Hi Thomas, Marc,

This patch series aims at allowing the 3 interrupt controller drivers
used on Broadcom STB platforms to be built as modules in order for those
to be shipped in a GKI enabled system (Android).

The irq-bcm7038-l1 requires us to export a number of symbols, which is
not great, but there are not obvious solutions other than adding
accessor functions to get the same information.

Assuming you are happy with the changes though, please do take the last
two changes as well through your tree.

Thanks!

Changes in v2:

- avoid using irq_to_desc() and use irq_get_irq_data() instead
- re-order patches to avoid linking failure for irq-brcmstb-l2
- removed the use of .irq_cpu_offline() and converted BMIPS to use
  irq_migrate_all_off_this_cpu()
- avoid exporting of_irq_count() and use a platform device passed
  down from the irqchip platform driver registration code instead
- added kernel-doc fix

Florian Fainelli (12):
  arch: Export cpu_logical_map to modules
  MIPS: BMIPS: Remove use of irq_cpu_offline
  irqchip/irq-bcm7038-l1: Remove .irq_cpu_offline()
  irqchip/irq-bcm7038-l1: Use irq_get_irq_data()
  irqchip/irq-bcm7038-l1: Switch to IRQCHIP_PLATFORM_DRIVER
  genirq: Export irq_gc_{unmask_enable,mask_disable}_reg
  irqchip/irq-brcmstb-l2: Switch to IRQCHIP_PLATFORM_DRIVER
  irqchip: Provide platform_device to of_irq_init_cb_t
  irqchip/irq-bcm7120-l2: Switch to IRQCHIP_PLATFORM_DRIVER
  arm64: broadcom: Removed forced select of interrupt controllers
  ARM: bcm: Removed forced select of interrupt controllers
  irqchip: Fix kernel-doc parameter typo for IRQCHIP_DECLARE

 arch/arm/kernel/setup.c          |  1 +
 arch/arm/mach-bcm/Kconfig        |  4 ----
 arch/arm64/Kconfig.platforms     |  3 ---
 arch/arm64/kernel/setup.c        |  1 +
 arch/mips/Kconfig                |  1 +
 arch/mips/kernel/smp-bmips.c     |  3 ++-
 arch/sh/kernel/smp.c             |  1 +
 drivers/irqchip/Kconfig          | 12 +++++++---
 drivers/irqchip/irq-bcm7038-l1.c | 38 +++++---------------------------
 drivers/irqchip/irq-bcm7120-l2.c | 28 +++++++++++++----------
 drivers/irqchip/irq-brcmstb-l2.c | 16 ++++++++------
 drivers/irqchip/irqchip.c        |  2 +-
 drivers/of/irq.c                 |  2 +-
 include/linux/irqchip.h          |  2 +-
 include/linux/of_irq.h           |  5 ++++-
 kernel/irq/generic-chip.c        |  2 ++
 16 files changed, 55 insertions(+), 66 deletions(-)

-- 
2.25.1

[PATCH v2 01/12] arch: Export cpu_logical_map to modules

[Florian Fainelli]

In order to allow drivers/irqchip/irq-bcm7038-l1.c to be built as a
module and usable in GKI, export cpu_logical_map or __cpu_logical_map
towards the modules. This follows what MIPS has been doing since
2dc2ae344e0e ("MIPS: Export __cpu_number_map and __cpu_logical_map.")

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 arch/arm/kernel/setup.c   | 1 +
 arch/arm64/kernel/setup.c | 1 +
 arch/sh/kernel/smp.c      | 1 +
 3 files changed, 3 insertions(+)

diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 284a80c0b6e1..abd5c999bdb2 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -585,6 +585,7 @@ void notrace cpu_init(void)
 }
 
 u32 __cpu_logical_map[NR_CPUS] = { [0 ... NR_CPUS-1] = MPIDR_INVALID };
+EXPORT_SYMBOL(__cpu_logical_map);
 
 void __init smp_setup_processor_id(void)
 {
diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
index be5f85b0a24d..d8f796ae13c4 100644
--- a/arch/arm64/kernel/setup.c
+++ b/arch/arm64/kernel/setup.c
@@ -290,6 +290,7 @@ u64 cpu_logical_map(unsigned int cpu)
 {
 	return __cpu_logical_map[cpu];
 }
+EXPORT_SYMBOL(cpu_logical_map);
 
 void __init __no_sanitize_address setup_arch(char **cmdline_p)
 {
diff --git a/arch/sh/kernel/smp.c b/arch/sh/kernel/smp.c
index 65924d9ec245..8f16cfaad238 100644
--- a/arch/sh/kernel/smp.c
+++ b/arch/sh/kernel/smp.c
@@ -30,6 +30,7 @@
 
 int __cpu_number_map[NR_CPUS];		/* Map physical to logical */
 int __cpu_logical_map[NR_CPUS];		/* Map logical to physical */
+EXPORT_SYMBOL(__cpu_logical_map);
 
 struct plat_smp_ops *mp_ops = NULL;
 
-- 
2.25.1

[PATCH v2 02/12] MIPS: BMIPS: Remove use of irq_cpu_offline

[Florian Fainelli]

irq_cpu_offline() is only used by MIPS and we should instead use
irq_migrate_all_off_this_cpu(). This will be helpful in order to remove
drivers/irqchip/irq-bcm7038-l1.c irq_cpu_offline callback which would
have got in the way of making this driver modular.

Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 arch/mips/Kconfig            | 1 +
 arch/mips/kernel/smp-bmips.c | 3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 771ca53af06d..2c03b27cec02 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1782,6 +1782,7 @@ config CPU_BMIPS
 	select CPU_HAS_PREFETCH
 	select CPU_SUPPORTS_CPUFREQ
 	select MIPS_EXTERNAL_TIMER
+	select GENERIC_IRQ_MIGRATION if HOTPLUG_CPU
 	help
 	  Support for BMIPS32/3300/4350/4380 and BMIPS5000 processors.
 
diff --git a/arch/mips/kernel/smp-bmips.c b/arch/mips/kernel/smp-bmips.c
index b6ef5f7312cf..f5d7bfa3472a 100644
--- a/arch/mips/kernel/smp-bmips.c
+++ b/arch/mips/kernel/smp-bmips.c
@@ -26,6 +26,7 @@
 #include <linux/bug.h>
 #include <linux/kernel.h>
 #include <linux/kexec.h>
+#include <linux/irq.h>
 
 #include <asm/time.h>
 #include <asm/processor.h>
@@ -373,7 +374,7 @@ static int bmips_cpu_disable(void)
 
 	set_cpu_online(cpu, false);
 	calculate_cpu_foreign_map();
-	irq_cpu_offline();
+	irq_migrate_all_off_this_cpu();
 	clear_c0_status(IE_IRQ5);
 
 	local_flush_tlb_all();
-- 
2.25.1

[PATCH v2 03/12] irqchip/irq-bcm7038-l1: Remove .irq_cpu_offline()

[Florian Fainelli]

With arch/mips/kernel/smp-bmips.c having been migrated away from
irq_cpu_offline() and use irq_migrate_all_off_this_cpu() instead, we no
longer need to implement an .irq_cpu_offline() callback. This is a
necessary change to facilitate the building of this driver as a module.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 drivers/irqchip/irq-bcm7038-l1.c | 30 ------------------------------
 1 file changed, 30 deletions(-)

diff --git a/drivers/irqchip/irq-bcm7038-l1.c b/drivers/irqchip/irq-bcm7038-l1.c
index a035c385ca7a..750156217c82 100644
--- a/drivers/irqchip/irq-bcm7038-l1.c
+++ b/drivers/irqchip/irq-bcm7038-l1.c
@@ -221,33 +221,6 @@ static int bcm7038_l1_set_affinity(struct irq_data *d,
 	return 0;
 }
 
-#ifdef CONFIG_SMP
-static void bcm7038_l1_cpu_offline(struct irq_data *d)
-{
-	struct cpumask *mask = irq_data_get_affinity_mask(d);
-	int cpu = smp_processor_id();
-	cpumask_t new_affinity;
-
-	/* This CPU was not on the affinity mask */
-	if (!cpumask_test_cpu(cpu, mask))
-		return;
-
-	if (cpumask_weight(mask) > 1) {
-		/*
-		 * Multiple CPU affinity, remove this CPU from the affinity
-		 * mask
-		 */
-		cpumask_copy(&new_affinity, mask);
-		cpumask_clear_cpu(cpu, &new_affinity);
-	} else {
-		/* Only CPU, put on the lowest online CPU */
-		cpumask_clear(&new_affinity);
-		cpumask_set_cpu(cpumask_first(cpu_online_mask), &new_affinity);
-	}
-	irq_set_affinity_locked(d, &new_affinity, false);
-}
-#endif
-
 static int __init bcm7038_l1_init_one(struct device_node *dn,
 				      unsigned int idx,
 				      struct bcm7038_l1_chip *intc)
@@ -396,9 +369,6 @@ static struct irq_chip bcm7038_l1_irq_chip = {
 	.irq_mask		= bcm7038_l1_mask,
 	.irq_unmask		= bcm7038_l1_unmask,
 	.irq_set_affinity	= bcm7038_l1_set_affinity,
-#ifdef CONFIG_SMP
-	.irq_cpu_offline	= bcm7038_l1_cpu_offline,
-#endif
 #ifdef CONFIG_PM_SLEEP
 	.irq_set_wake		= bcm7038_l1_set_wake,
 #endif
-- 
2.25.1

[PATCH v2 04/12] irqchip/irq-bcm7038-l1: Use irq_get_irq_data()

[Florian Fainelli]

Using irq_desc_get_irq_data(irq_to_desc()) to retrieve the irq_data
structure from a virtual interrupt number is going to be problematic to
make irq-bcm7038-l1 a module because irq_to_desc() is not exported, and
there is no intent to export it to modules, see 64a1b95bb9fe ("genirq:
Restrict export of irq_to_desc()").

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 drivers/irqchip/irq-bcm7038-l1.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-bcm7038-l1.c b/drivers/irqchip/irq-bcm7038-l1.c
index 750156217c82..14caf32dc23e 100644
--- a/drivers/irqchip/irq-bcm7038-l1.c
+++ b/drivers/irqchip/irq-bcm7038-l1.c
@@ -386,7 +386,7 @@ static int bcm7038_l1_map(struct irq_domain *d, unsigned int virq,
 
 	irq_set_chip_and_handler(virq, &bcm7038_l1_irq_chip, handle_level_irq);
 	irq_set_chip_data(virq, d->host_data);
-	irqd_set_single_target(irq_desc_get_irq_data(irq_to_desc(virq)));
+	irqd_set_single_target(irq_get_irq_data(virq));
 	return 0;
 }
 
-- 
2.25.1

[PATCH v2 05/12] irqchip/irq-bcm7038-l1: Switch to IRQCHIP_PLATFORM_DRIVER

[Florian Fainelli]

Allow the user selection and building of this interrupt controller
driver as a module since it is used on ARM/ARM64 based systems as a
second level interrupt controller hanging off the ARM GIC and is
therefore loadable during boot.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 drivers/irqchip/Kconfig          | 4 +++-
 drivers/irqchip/irq-bcm7038-l1.c | 6 +++++-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index 4d5924e9f766..3022f6137096 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -115,7 +115,9 @@ config BCM6345_L1_IRQ
 	select GENERIC_IRQ_EFFECTIVE_AFF_MASK
 
 config BCM7038_L1_IRQ
-	bool
+	tristate "Broadcom STB 7038-style L1/L2 interrupt controller driver"
+	depends on ARCH_BRCMSTB || BMIPS_GENERIC
+	default ARCH_BRCMSTB || BMIPS_GENERIC
 	select GENERIC_IRQ_CHIP
 	select IRQ_DOMAIN
 	select GENERIC_IRQ_EFFECTIVE_AFF_MASK
diff --git a/drivers/irqchip/irq-bcm7038-l1.c b/drivers/irqchip/irq-bcm7038-l1.c
index 14caf32dc23e..78f029bac129 100644
--- a/drivers/irqchip/irq-bcm7038-l1.c
+++ b/drivers/irqchip/irq-bcm7038-l1.c
@@ -454,4 +454,8 @@ static int __init bcm7038_l1_of_init(struct device_node *dn,
 	return ret;
 }
 
-IRQCHIP_DECLARE(bcm7038_l1, "brcm,bcm7038-l1-intc", bcm7038_l1_of_init);
+IRQCHIP_PLATFORM_DRIVER_BEGIN(bcm7038_l1)
+IRQCHIP_MATCH("brcm,bcm7038-l1-intc", bcm7038_l1_of_init)
+IRQCHIP_PLATFORM_DRIVER_END(bcm7038_l1)
+MODULE_DESCRIPTION("Broadcom STB 7038-style L1/L2 interrupt controller");
+MODULE_LICENSE("GPL v2");
-- 
2.25.1

[PATCH v2 06/12] genirq: Export irq_gc_{unmask_enable,mask_disable}_reg

[Florian Fainelli]

In order to allow drivers/irqchip/irq-brcmstb-l2.c to be built as a
module we need to export: irq_gc_unmask_enable_reg() and
irq_gc_mask_disable_reg().

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 kernel/irq/generic-chip.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/irq/generic-chip.c b/kernel/irq/generic-chip.c
index cc7cdd26e23e..4c011c21bb1a 100644
--- a/kernel/irq/generic-chip.c
+++ b/kernel/irq/generic-chip.c
@@ -44,6 +44,7 @@ void irq_gc_mask_disable_reg(struct irq_data *d)
 	*ct->mask_cache &= ~mask;
 	irq_gc_unlock(gc);
 }
+EXPORT_SYMBOL_GPL(irq_gc_mask_disable_reg);
 
 /**
  * irq_gc_mask_set_bit - Mask chip via setting bit in mask register
@@ -103,6 +104,7 @@ void irq_gc_unmask_enable_reg(struct irq_data *d)
 	*ct->mask_cache |= mask;
 	irq_gc_unlock(gc);
 }
+EXPORT_SYMBOL_GPL(irq_gc_unmask_enable_reg);
 
 /**
  * irq_gc_ack_set_bit - Ack pending interrupt via setting bit
-- 
2.25.1

[PATCH v2 07/12] irqchip/irq-brcmstb-l2: Switch to IRQCHIP_PLATFORM_DRIVER

[Florian Fainelli]

Allow the user selection and building of this interrupt controller
driver as a module since it is used on ARM/ARM64 based systems as a
second level interrupt controller hanging off the ARM GIC and is
therefore loadable during boot.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 drivers/irqchip/Kconfig          |  4 +++-
 drivers/irqchip/irq-brcmstb-l2.c | 16 +++++++++-------
 2 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index 3022f6137096..dfe54bf9b35f 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -128,7 +128,9 @@ config BCM7120_L2_IRQ
 	select IRQ_DOMAIN
 
 config BRCMSTB_L2_IRQ
-	bool
+	tristate "Broadcom STB generic L2 interrupt controller driver"
+	depends on ARCH_BCM2835 || ARCH_BRCMSTB || BMIPS_GENERIC
+	default ARCH_BCM2835 || ARCH_BRCMSTB || BMIPS_GENERIC
 	select GENERIC_IRQ_CHIP
 	select IRQ_DOMAIN
 
diff --git a/drivers/irqchip/irq-brcmstb-l2.c b/drivers/irqchip/irq-brcmstb-l2.c
index 8e0911561f2d..e4efc08ac594 100644
--- a/drivers/irqchip/irq-brcmstb-l2.c
+++ b/drivers/irqchip/irq-brcmstb-l2.c
@@ -275,16 +275,18 @@ static int __init brcmstb_l2_edge_intc_of_init(struct device_node *np,
 {
 	return brcmstb_l2_intc_of_init(np, parent, &l2_edge_intc_init);
 }
-IRQCHIP_DECLARE(brcmstb_l2_intc, "brcm,l2-intc", brcmstb_l2_edge_intc_of_init);
-IRQCHIP_DECLARE(brcmstb_hif_spi_l2_intc, "brcm,hif-spi-l2-intc",
-		brcmstb_l2_edge_intc_of_init);
-IRQCHIP_DECLARE(brcmstb_upg_aux_aon_l2_intc, "brcm,upg-aux-aon-l2-intc",
-		brcmstb_l2_edge_intc_of_init);
 
 static int __init brcmstb_l2_lvl_intc_of_init(struct device_node *np,
 	struct device_node *parent)
 {
 	return brcmstb_l2_intc_of_init(np, parent, &l2_lvl_intc_init);
 }
-IRQCHIP_DECLARE(bcm7271_l2_intc, "brcm,bcm7271-l2-intc",
-	brcmstb_l2_lvl_intc_of_init);
+
+IRQCHIP_PLATFORM_DRIVER_BEGIN(brcmstb_l2)
+IRQCHIP_MATCH("brcm,l2-intc", brcmstb_l2_edge_intc_of_init)
+IRQCHIP_MATCH("brcm,hif-spi-l2-intc", brcmstb_l2_edge_intc_of_init)
+IRQCHIP_MATCH("brcm,upg-aux-aon-l2-intc", brcmstb_l2_edge_intc_of_init)
+IRQCHIP_MATCH("brcm,bcm7271-l2-intc", brcmstb_l2_lvl_intc_of_init)
+IRQCHIP_PLATFORM_DRIVER_END(brcmstb_l2)
+MODULE_DESCRIPTION("Broadcom STB generic L2 interrupt controller");
+MODULE_LICENSE("GPL v2");
-- 
2.25.1

[PATCH v2 08/12] irqchip: Provide platform_device to of_irq_init_cb_t

[Florian Fainelli]

Provide the platform device mapping to the interrupt controller node to
the of_irq_init_cb_t callback such that drivers can make use of it.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 drivers/irqchip/irqchip.c | 2 +-
 drivers/of/irq.c          | 2 +-
 include/linux/of_irq.h    | 5 ++++-
 3 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/irqchip/irqchip.c b/drivers/irqchip/irqchip.c
index 3570f0a588c4..289784eefd00 100644
--- a/drivers/irqchip/irqchip.c
+++ b/drivers/irqchip/irqchip.c
@@ -55,6 +55,6 @@ int platform_irqchip_probe(struct platform_device *pdev)
 	if (par_np && !irq_find_matching_host(par_np, DOMAIN_BUS_ANY))
 		return -EPROBE_DEFER;
 
-	return irq_init_cb(np, par_np);
+	return irq_init_cb(np, par_np, pdev);
 }
 EXPORT_SYMBOL_GPL(platform_irqchip_probe);
diff --git a/drivers/of/irq.c b/drivers/of/irq.c
index 352e14b007e7..18f3f5c00c87 100644
--- a/drivers/of/irq.c
+++ b/drivers/of/irq.c
@@ -538,7 +538,7 @@ void __init of_irq_init(const struct of_device_id *matches)
 				 desc->dev,
 				 desc->dev, desc->interrupt_parent);
 			ret = desc->irq_init_cb(desc->dev,
-						desc->interrupt_parent);
+						desc->interrupt_parent, NULL);
 			if (ret) {
 				of_node_clear_flag(desc->dev, OF_POPULATED);
 				kfree(desc);
diff --git a/include/linux/of_irq.h b/include/linux/of_irq.h
index aaf219bd0354..89acc8b089f0 100644
--- a/include/linux/of_irq.h
+++ b/include/linux/of_irq.h
@@ -9,7 +9,10 @@
 #include <linux/ioport.h>
 #include <linux/of.h>
 
-typedef int (*of_irq_init_cb_t)(struct device_node *, struct device_node *);
+struct platform_device;
+
+typedef int (*of_irq_init_cb_t)(struct device_node *, struct device_node *,
+				struct platform_device *);
 
 /*
  * Workarounds only applied to 32bit powermac machines
-- 
2.25.1

[PATCH v2 09/12] irqchip/irq-bcm7120-l2: Switch to IRQCHIP_PLATFORM_DRIVER

[Florian Fainelli]

Allow the user selection and building of this interrupt controller
driver as a module since it is used on ARM/ARM64 based systems as a
second level interrupt controller hanging off the ARM GIC and is
therefore loadable during boot.

To avoid using of_irq_count() which is not exported towards module,
switch the driver to use the platform_device provided by the irqchip
platform driver code and resolve the number of interrupts using
platform_irq_count().

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 drivers/irqchip/Kconfig          |  4 +++-
 drivers/irqchip/irq-bcm7120-l2.c | 28 ++++++++++++++++------------
 2 files changed, 19 insertions(+), 13 deletions(-)

diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index dfe54bf9b35f..c7320bed5668 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -123,7 +123,9 @@ config BCM7038_L1_IRQ
 	select GENERIC_IRQ_EFFECTIVE_AFF_MASK
 
 config BCM7120_L2_IRQ
-	bool
+	tristate "Broadcom STB 7120-style L2 interrupt controller driver"
+	depends on ARCH_BRCMSTB || BMIPS_GENERIC
+	default ARCH_BRCMSTB || BMIPS_GENERIC
 	select GENERIC_IRQ_CHIP
 	select IRQ_DOMAIN
 
diff --git a/drivers/irqchip/irq-bcm7120-l2.c b/drivers/irqchip/irq-bcm7120-l2.c
index f23d7651ea84..9b1edf7747fd 100644
--- a/drivers/irqchip/irq-bcm7120-l2.c
+++ b/drivers/irqchip/irq-bcm7120-l2.c
@@ -214,6 +214,7 @@ static int __init bcm7120_l2_intc_iomap_3380(struct device_node *dn,
 
 static int __init bcm7120_l2_intc_probe(struct device_node *dn,
 				 struct device_node *parent,
+				 struct platform_device *pdev,
 				 int (*iomap_regs_fn)(struct device_node *,
 					struct bcm7120_l2_intc_data *),
 				 const char *intc_name)
@@ -230,7 +231,7 @@ static int __init bcm7120_l2_intc_probe(struct device_node *dn,
 	if (!data)
 		return -ENOMEM;
 
-	data->num_parent_irqs = of_irq_count(dn);
+	data->num_parent_irqs = platform_irq_count(pdev);
 	if (data->num_parent_irqs <= 0) {
 		pr_err("invalid number of parent interrupts\n");
 		ret = -ENOMEM;
@@ -334,21 +335,24 @@ static int __init bcm7120_l2_intc_probe(struct device_node *dn,
 }
 
 static int __init bcm7120_l2_intc_probe_7120(struct device_node *dn,
-					     struct device_node *parent)
+					     struct device_node *parent,
+					     struct platform_device *pdev)
 {
-	return bcm7120_l2_intc_probe(dn, parent, bcm7120_l2_intc_iomap_7120,
-				     "BCM7120 L2");
+	return bcm7120_l2_intc_probe(dn, parent, pdev,
+				     bcm7120_l2_intc_iomap_7120, "BCM7120 L2");
 }
 
 static int __init bcm7120_l2_intc_probe_3380(struct device_node *dn,
-					     struct device_node *parent)
+					     struct device_node *parent,
+					     struct platform_device *pdev)
 {
-	return bcm7120_l2_intc_probe(dn, parent, bcm7120_l2_intc_iomap_3380,
-				     "BCM3380 L2");
+	return bcm7120_l2_intc_probe(dn, parent, pdev,
+				     bcm7120_l2_intc_iomap_3380, "BCM3380 L2");
 }
 
-IRQCHIP_DECLARE(bcm7120_l2_intc, "brcm,bcm7120-l2-intc",
-		bcm7120_l2_intc_probe_7120);
-
-IRQCHIP_DECLARE(bcm3380_l2_intc, "brcm,bcm3380-l2-intc",
-		bcm7120_l2_intc_probe_3380);
+IRQCHIP_PLATFORM_DRIVER_BEGIN(bcm7120_l2)
+IRQCHIP_MATCH("brcm,bcm7120-l2-intc", bcm7120_l2_intc_probe_7120)
+IRQCHIP_MATCH("brcm,bcm3380-l2-intc", bcm7120_l2_intc_probe_3380)
+IRQCHIP_PLATFORM_DRIVER_END(bcm7120_l2)
+MODULE_DESCRIPTION("Broadcom STB 7120-style L2 interrupt controller driver");
+MODULE_LICENSE("GPL v2");
-- 
2.25.1

[PATCH v2 10/12] arm64: broadcom: Removed forced select of interrupt controllers

[Florian Fainelli]

Now that the various second level interrupt controllers have been moved
to IRQCHIP_PLATFORM_DRIVER and they do default to ARCH_BRCMSTB and
ARCH_BCM2835 where relevant, remove their forced selection from the
machine entry to allow an user to build them as modules.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 arch/arm64/Kconfig.platforms | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/arch/arm64/Kconfig.platforms b/arch/arm64/Kconfig.platforms
index b0ce18d4cc98..2e9440f2da22 100644
--- a/arch/arm64/Kconfig.platforms
+++ b/arch/arm64/Kconfig.platforms
@@ -44,7 +44,6 @@ config ARCH_BCM2835
 	select ARM_AMBA
 	select ARM_GIC
 	select ARM_TIMER_SP804
-	select BRCMSTB_L2_IRQ
 	help
 	  This enables support for the Broadcom BCM2837 and BCM2711 SoC.
 	  These SoCs are used in the Raspberry Pi 3 and 4 devices.
@@ -82,8 +81,6 @@ config ARCH_BITMAIN
 config ARCH_BRCMSTB
 	bool "Broadcom Set-Top-Box SoCs"
 	select ARCH_HAS_RESET_CONTROLLER
-	select BCM7038_L1_IRQ
-	select BRCMSTB_L2_IRQ
 	select GENERIC_IRQ_CHIP
 	select PINCTRL
 	help
-- 
2.25.1

[PATCH v2 11/12] ARM: bcm: Removed forced select of interrupt controllers

[Florian Fainelli]

Now that the various second level interrupt controllers have been moved
to IRQCHIP_PLATFORM_DRIVER and they do default to ARCH_BRCMSTB and
ARCH_BCM2835 where relevant, remove their forced selection from the
machine entry to allow an user to build them as modules.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 arch/arm/mach-bcm/Kconfig | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/arch/arm/mach-bcm/Kconfig b/arch/arm/mach-bcm/Kconfig
index 2890e61b2b46..bd3f82788ebc 100644
--- a/arch/arm/mach-bcm/Kconfig
+++ b/arch/arm/mach-bcm/Kconfig
@@ -161,7 +161,6 @@ config ARCH_BCM2835
 	select ARM_TIMER_SP804
 	select HAVE_ARM_ARCH_TIMER if ARCH_MULTI_V7
 	select BCM2835_TIMER
-	select BRCMSTB_L2_IRQ
 	select PINCTRL
 	select PINCTRL_BCM2835
 	select MFD_CORE
@@ -209,9 +208,6 @@ config ARCH_BRCMSTB
 	select ARM_GIC
 	select ARM_ERRATA_798181 if SMP
 	select HAVE_ARM_ARCH_TIMER
-	select BCM7038_L1_IRQ
-	select BRCMSTB_L2_IRQ
-	select BCM7120_L2_IRQ
 	select ZONE_DMA if ARM_LPAE
 	select SOC_BRCMSTB
 	select SOC_BUS
-- 
2.25.1

[PATCH v2 12/12] irqchip: Fix kernel-doc parameter typo for IRQCHIP_DECLARE

[Florian Fainelli]

The documentation refers to "compstr" when we have the argument named
"compat", fix the typo.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 include/linux/irqchip.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/irqchip.h b/include/linux/irqchip.h
index 67351aac65ef..ccf32758ea85 100644
--- a/include/linux/irqchip.h
+++ b/include/linux/irqchip.h
@@ -23,7 +23,7 @@
  *
  * @name: name that must be unique across all IRQCHIP_DECLARE of the
  * same file.
- * @compstr: compatible string of the irqchip driver
+ * @compat: compatible string of the irqchip driver
  * @fn: initialization function
  */
 #define IRQCHIP_DECLARE(name, compat, fn) OF_DECLARE_2(irqchip, name, compat, fn)
-- 
2.25.1

Re: [PATCH v2 01/12] arch: Export cpu_logical_map to modules

[Christoph Hellwig]

On Mon, Sep 27, 2021 at 07:27:04PM -0700, Florian Fainelli wrote:
> In order to allow drivers/irqchip/irq-bcm7038-l1.c to be built as a
> module and usable in GKI, export cpu_logical_map or __cpu_logical_map
> towards the modules. This follows what MIPS has been doing since
> 2dc2ae344e0e ("MIPS: Export __cpu_number_map and __cpu_logical_map.")

This seems like a pretty bad idea.  For one you should export an
accessor instead of the data structure.  And this probably should be an
EXPORT_SYMBOL_GPL.

Re: [PATCH v2 01/12] arch: Export cpu_logical_map to modules

[Florian Fainelli]

On 9/27/21 10:08 PM, Christoph Hellwig wrote:
> On Mon, Sep 27, 2021 at 07:27:04PM -0700, Florian Fainelli wrote:
>> In order to allow drivers/irqchip/irq-bcm7038-l1.c to be built as a
>> module and usable in GKI, export cpu_logical_map or __cpu_logical_map
>> towards the modules. This follows what MIPS has been doing since
>> 2dc2ae344e0e ("MIPS: Export __cpu_number_map and __cpu_logical_map.")
> 
> This seems like a pretty bad idea.  For one you should export an
> accessor instead of the data structure.  And this probably should be an
> EXPORT_SYMBOL_GPL.

In hindsight, we should not need that change, and the use of
cpu_logical_map[] within drivers/irqchip/irq-bcm7038-l1.c should be
restricted to a MIPS build where the driver is a level 1 interrupt
controller and there are multiple per-cpu register copies.

In an ARM/ARM64 configuration that driver is always used as a second
level interrupt controller whereby it is hanging off the ARM GIC
interrupt controller, and the intc->cpus[] array will only be 1 element.
Fortunately since you cannot re-parent a L2 interrupt controller's
interrupt handler to a different CPU, "it just happens to work".

Thanks!
-- 
Florian