ath79: add kernel 5.10 support

This adds Kernel 5.10 support for the generic, nand and tiny subtargets.

The following patch is not contained, as it needs to be reworked:
platform/920-mikrotik-rb4xx.patch

Tested-on:
 - Siemens WS-AP3610
 - Enterasys WS-AP3710
 - Aerohive HiveAP 121
 - TP-Link TL-WA901 v2
 - TP-Link TL-WR741 v1

Signed-off-by: David Bauer <mail@david-bauer.net>

1 files changed, 139 insertions, 0 deletions

diff --git a/target/linux/ath79/patches-5.10/0036-MIPS-ath79-remove-irq-code-from-pci.patch b/target/linux/ath79/patches-5.10/0036-MIPS-ath79-remove-irq-code-from-pci.patch
new file mode 100644
index 0000000000..80fcd0a7f5
--- /dev/null
+++ b/target/linux/ath79/patches-5.10/0036-MIPS-ath79-remove-irq-code-from-pci.patch
@@ -0,0 +1,139 @@
+--- a/arch/mips/pci/pci-ar71xx.c
++++ b/arch/mips/pci/pci-ar71xx.c
+@@ -51,11 +51,9 @@
+ struct ar71xx_pci_controller {
+ 	struct device_node *np;
+ 	void __iomem *cfg_base;
+-	int irq;
+ 	struct pci_controller pci_ctrl;
+ 	struct resource io_res;
+ 	struct resource mem_res;
+-	struct irq_domain *domain;
+ };
+ 
+ /* Byte lane enable bits */
+@@ -227,104 +225,6 @@ static struct pci_ops ar71xx_pci_ops = {
+ 	.write	= ar71xx_pci_write_config,
+ };
+ 
+-static void ar71xx_pci_irq_handler(struct irq_desc *desc)
+-{
+-	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;
+-
+-	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(irq_linear_revmap(apc->domain, 1));
+-
+-	else if (pending & AR71XX_PCI_INT_DEV1)
+-		generic_handle_irq(irq_linear_revmap(apc->domain, 2));
+-
+-	else if (pending & AR71XX_PCI_INT_DEV2)
+-		generic_handle_irq(irq_linear_revmap(apc->domain, 3));
+-
+-	else if (pending & AR71XX_PCI_INT_CORE)
+-		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)
+-{
+-	struct ar71xx_pci_controller *apc;
+-	unsigned int irq;
+-	void __iomem *base = ath79_reset_base;
+-	u32 t;
+-
+-	apc = irq_data_get_irq_chip_data(d);
+-	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);
+-
+-	/* flush write */
+-	__raw_readl(base + AR71XX_RESET_REG_PCI_INT_ENABLE);
+-}
+-
+-static void ar71xx_pci_irq_mask(struct irq_data *d)
+-{
+-	struct ar71xx_pci_controller *apc;
+-	unsigned int irq;
+-	void __iomem *base = ath79_reset_base;
+-	u32 t;
+-
+-	apc = irq_data_get_irq_chip_data(d);
+-	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);
+-
+-	/* flush write */
+-	__raw_readl(base + AR71XX_RESET_REG_PCI_INT_ENABLE);
+-}
+-
+-static struct irq_chip ar71xx_pci_irq_chip = {
+-	.name		= "AR71XX PCI",
+-	.irq_mask	= ar71xx_pci_irq_mask,
+-	.irq_unmask	= ar71xx_pci_irq_unmask,
+-	.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;
+-
+-	__raw_writel(0, base + AR71XX_RESET_REG_PCI_INT_ENABLE);
+-	__raw_writel(0, base + AR71XX_RESET_REG_PCI_INT_STATUS);
+-
+-	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);
+-}
+-
+ static void ar71xx_pci_reset(void)
+ {
+ 	ath79_device_reset_set(AR71XX_RESET_PCI_BUS | AR71XX_RESET_PCI_CORE);
+@@ -358,10 +258,6 @@ static int ar71xx_pci_probe(struct platf
+ 	if (IS_ERR(apc->cfg_base))
+ 		return PTR_ERR(apc->cfg_base);
+ 
+-	apc->irq = platform_get_irq(pdev, 0);
+-	if (apc->irq < 0)
+-		return -EINVAL;
+-
+ 	ar71xx_pci_reset();
+ 
+ 	/* setup COMMAND register */
+@@ -372,8 +268,6 @@ static int ar71xx_pci_probe(struct platf
+ 	/* clear bus errors */
+ 	ar71xx_pci_check_error(apc, 1);
+ 
+-	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;