ath79: add support for linux 4.19

The following patches are dropped because they are merged upstream:
-0001-tty-serial-drop-QCA-pecific-SoC-symbols.patch
-0006-usb-drop-deprecated-symbols.patch
-0009-MIPS-ath79-add-lots-of-missing-registers.patch
-0010-MIPS-ath79-add-support-for-QCA953x-QCA956x-TP9343.patch
-0014-MIPS-ath79-finetune-cpu-overrides.patch
-0015-MIPS-ath79-enable-uart-during-early_prink.patch
-0016-MIPS-ath79-get-PCIe-controller-out-of-reset.patch

This patch is dropped due to the introduction of spi-mem framework:
-461-spi-ath79-add-fast-flash-read.patch

Thank to Michael Marley @mamarley for his work on this patch:
-910-unaligned_access_hacks.patch

Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
[synchronized kernel config with make kernel_oldconfig]
Signed-off-by: Petr Štetiar <ynezz@true.cz>

1 files changed, 202 insertions, 0 deletions

diff --git a/target/linux/ath79/patches-4.19/0018-MIPS-pci-ar71xx-convert-to-OF.patch b/target/linux/ath79/patches-4.19/0018-MIPS-pci-ar71xx-convert-to-OF.patch
new file mode 100644
index 0000000000..91796a12f0
--- /dev/null
+++ b/target/linux/ath79/patches-4.19/0018-MIPS-pci-ar71xx-convert-to-OF.patch
@@ -0,0 +1,202 @@
+From 1855ab6b1d27f5b38a648baf57ff6a534afec26d Mon Sep 17 00:00:00 2001
+From: John Crispin <john@phrozen.org>
+Date: Sat, 23 Jun 2018 15:07:23 +0200
+Subject: [PATCH 18/33] MIPS: pci-ar71xx: convert to OF
+
+With the ath79 target getting converted to pure OF, we can drop all the
+platform data code and add the missing OF bits to the driver. We also add
+a irq domain for the PCI/e controllers cascade, thus making it usable from
+dts files.
+
+Signed-off-by: John Crispin <john@phrozen.org>
+---
+ arch/mips/pci/pci-ar71xx.c | 82 +++++++++++++++++++++++-----------------------
+ 1 file changed, 41 insertions(+), 41 deletions(-)
+
+--- a/arch/mips/pci/pci-ar71xx.c
++++ b/arch/mips/pci/pci-ar71xx.c
+@@ -18,8 +18,11 @@
+ #include <linux/pci.h>
+ #include <linux/pci_regs.h>
+ #include <linux/interrupt.h>
++#include <linux/irqchip/chained_irq.h>
+ #include <linux/init.h>
+ #include <linux/platform_device.h>
++#include <linux/of_irq.h>
++#include <linux/of_pci.h>
+ 
+ #include <asm/mach-ath79/ar71xx_regs.h>
+ #include <asm/mach-ath79/ath79.h>
+@@ -49,12 +52,13 @@
+ #define AR71XX_PCI_IRQ_COUNT		5
+ 
+ struct ar71xx_pci_controller {
++	struct device_node *np;
+ 	void __iomem *cfg_base;
+ 	int irq;
+-	int irq_base;
+ 	struct pci_controller pci_ctrl;
+ 	struct resource io_res;
+ 	struct resource mem_res;
++	struct irq_domain *domain;
+ };
+ 
+ /* Byte lane enable bits */
+@@ -228,29 +232,30 @@ static struct pci_ops ar71xx_pci_ops = {
+ 
+ static void ar71xx_pci_irq_handler(struct irq_desc *desc)
+ {
+-	struct ar71xx_pci_controller *apc;
+ 	void __iomem *base = ath79_reset_base;
++	struct irq_chip *chip = irq_desc_get_chip(desc);
++	struct ar71xx_pci_controller *apc = irq_desc_get_handler_data(desc);
+ 	u32 pending;
+ 
+-	apc = irq_desc_get_handler_data(desc);
+-
++	chained_irq_enter(chip, desc);
+ 	pending = __raw_readl(base + AR71XX_RESET_REG_PCI_INT_STATUS) &
+ 		  __raw_readl(base + AR71XX_RESET_REG_PCI_INT_ENABLE);
+ 
+ 	if (pending & AR71XX_PCI_INT_DEV0)
+-		generic_handle_irq(apc->irq_base + 0);
++		generic_handle_irq(irq_linear_revmap(apc->domain, 1));
+ 
+ 	else if (pending & AR71XX_PCI_INT_DEV1)
+-		generic_handle_irq(apc->irq_base + 1);
++		generic_handle_irq(irq_linear_revmap(apc->domain, 2));
+ 
+ 	else if (pending & AR71XX_PCI_INT_DEV2)
+-		generic_handle_irq(apc->irq_base + 2);
++		generic_handle_irq(irq_linear_revmap(apc->domain, 3));
+ 
+ 	else if (pending & AR71XX_PCI_INT_CORE)
+-		generic_handle_irq(apc->irq_base + 4);
++		generic_handle_irq(irq_linear_revmap(apc->domain, 4));
+ 
+ 	else
+ 		spurious_interrupt();
++	chained_irq_exit(chip, desc);
+ }
+ 
+ static void ar71xx_pci_irq_unmask(struct irq_data *d)
+@@ -261,7 +266,7 @@ static void ar71xx_pci_irq_unmask(struct
+ 	u32 t;
+ 
+ 	apc = irq_data_get_irq_chip_data(d);
+-	irq = d->irq - apc->irq_base;
++	irq = irq_linear_revmap(apc->domain, d->irq);
+ 
+ 	t = __raw_readl(base + AR71XX_RESET_REG_PCI_INT_ENABLE);
+ 	__raw_writel(t | (1 << irq), base + AR71XX_RESET_REG_PCI_INT_ENABLE);
+@@ -278,7 +283,7 @@ static void ar71xx_pci_irq_mask(struct i
+ 	u32 t;
+ 
+ 	apc = irq_data_get_irq_chip_data(d);
+-	irq = d->irq - apc->irq_base;
++	irq = irq_linear_revmap(apc->domain, d->irq);
+ 
+ 	t = __raw_readl(base + AR71XX_RESET_REG_PCI_INT_ENABLE);
+ 	__raw_writel(t & ~(1 << irq), base + AR71XX_RESET_REG_PCI_INT_ENABLE);
+@@ -294,24 +299,31 @@ static struct irq_chip ar71xx_pci_irq_ch
+ 	.irq_mask_ack	= ar71xx_pci_irq_mask,
+ };
+ 
++static int ar71xx_pci_irq_map(struct irq_domain *d,
++			      unsigned int irq, irq_hw_number_t hw)
++{
++	struct ar71xx_pci_controller *apc = d->host_data;
++
++	irq_set_chip_and_handler(irq, &ar71xx_pci_irq_chip, handle_level_irq);
++	irq_set_chip_data(irq, apc);
++
++	return 0;
++}
++
++static const struct irq_domain_ops ar71xx_pci_domain_ops = {
++	.xlate = irq_domain_xlate_onecell,
++	.map = ar71xx_pci_irq_map,
++};
++
+ static void ar71xx_pci_irq_init(struct ar71xx_pci_controller *apc)
+ {
+ 	void __iomem *base = ath79_reset_base;
+-	int i;
+ 
+ 	__raw_writel(0, base + AR71XX_RESET_REG_PCI_INT_ENABLE);
+ 	__raw_writel(0, base + AR71XX_RESET_REG_PCI_INT_STATUS);
+ 
+-	BUILD_BUG_ON(ATH79_PCI_IRQ_COUNT < AR71XX_PCI_IRQ_COUNT);
+-
+-	apc->irq_base = ATH79_PCI_IRQ_BASE;
+-	for (i = apc->irq_base;
+-	     i < apc->irq_base + AR71XX_PCI_IRQ_COUNT; i++) {
+-		irq_set_chip_and_handler(i, &ar71xx_pci_irq_chip,
+-					 handle_level_irq);
+-		irq_set_chip_data(i, apc);
+-	}
+-
++	apc->domain = irq_domain_add_linear(apc->np, AR71XX_PCI_IRQ_COUNT,
++					    &ar71xx_pci_domain_ops, apc);
+ 	irq_set_chained_handler_and_data(apc->irq, ar71xx_pci_irq_handler,
+ 					 apc);
+ }
+@@ -328,6 +340,11 @@ static void ar71xx_pci_reset(void)
+ 	mdelay(100);
+ }
+ 
++static const struct of_device_id ar71xx_pci_ids[] = {
++	{ .compatible = "qca,ar7100-pci" },
++	{},
++};
++
+ static int ar71xx_pci_probe(struct platform_device *pdev)
+ {
+ 	struct ar71xx_pci_controller *apc;
+@@ -348,26 +365,6 @@ static int ar71xx_pci_probe(struct platf
+ 	if (apc->irq < 0)
+ 		return -EINVAL;
+ 
+-	res = platform_get_resource_byname(pdev, IORESOURCE_IO, "io_base");
+-	if (!res)
+-		return -EINVAL;
+-
+-	apc->io_res.parent = res;
+-	apc->io_res.name = "PCI IO space";
+-	apc->io_res.start = res->start;
+-	apc->io_res.end = res->end;
+-	apc->io_res.flags = IORESOURCE_IO;
+-
+-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mem_base");
+-	if (!res)
+-		return -EINVAL;
+-
+-	apc->mem_res.parent = res;
+-	apc->mem_res.name = "PCI memory space";
+-	apc->mem_res.start = res->start;
+-	apc->mem_res.end = res->end;
+-	apc->mem_res.flags = IORESOURCE_MEM;
+-
+ 	ar71xx_pci_reset();
+ 
+ 	/* setup COMMAND register */
+@@ -380,9 +377,11 @@ static int ar71xx_pci_probe(struct platf
+ 
+ 	ar71xx_pci_irq_init(apc);
+ 
++	apc->np = pdev->dev.of_node;
+ 	apc->pci_ctrl.pci_ops = &ar71xx_pci_ops;
+ 	apc->pci_ctrl.mem_resource = &apc->mem_res;
+ 	apc->pci_ctrl.io_resource = &apc->io_res;
++	pci_load_of_ranges(&apc->pci_ctrl, pdev->dev.of_node);
+ 
+ 	register_pci_controller(&apc->pci_ctrl);
+ 
+@@ -393,6 +392,7 @@ static struct platform_driver ar71xx_pci
+ 	.probe = ar71xx_pci_probe,
+ 	.driver = {
+ 		.name = "ar71xx-pci",
++		.of_match_table = of_match_ptr(ar71xx_pci_ids),
+ 	},
+ };
+