diff options
Diffstat (limited to 'target/linux/ramips/patches-5.4/0121-staging-mt7621-pci-fix-PCIe-interrupt-mapping.patch')
| -rw-r--r-- | target/linux/ramips/patches-5.4/0121-staging-mt7621-pci-fix-PCIe-interrupt-mapping.patch | 157 |
1 files changed, 0 insertions, 157 deletions
diff --git a/target/linux/ramips/patches-5.4/0121-staging-mt7621-pci-fix-PCIe-interrupt-mapping.patch b/target/linux/ramips/patches-5.4/0121-staging-mt7621-pci-fix-PCIe-interrupt-mapping.patch deleted file mode 100644 index 68de6df2db..0000000000 --- a/target/linux/ramips/patches-5.4/0121-staging-mt7621-pci-fix-PCIe-interrupt-mapping.patch +++ /dev/null @@ -1,157 +0,0 @@ -From fab6710e4c51f4eb622f95a08322ab5fdbe3f295 Mon Sep 17 00:00:00 2001 -From: Sergio Paracuellos <sergio.paracuellos@gmail.com> -Date: Mon, 13 Apr 2020 07:59:42 +0200 -Subject: [PATCH] staging: mt7621-pci: fix PCIe interrupt mapping - -MT7621 has three assigned interrupts for the pcie. This -interrupts should properly being mapped taking into account -which devices are finally connected in which bus according -to link status. So the irq mappings should be as follows -according to link status (three bits indicating which devices -are link up): - -* For PCIe Bus 1 slot 0: - - status = 0x2 || status = 0x6 => IRQ = pcie1_irq (24). - - status = 0x4 => IRQ = pcie2_irq (25). - - default => IRQ = pcie0_irq (23). -* For PCIe Bus 2 slot 0: - - status = 0x5 || status = 0x6 => IRQ = pcie2_irq (25). - - default => IRQ = pcie1_irq (24). -* For PCIe Bus 2 slot 1: - - status = 0x5 || status = 0x6 => IRQ = pcie2_irq (25). - - default => IRQ = pcie1_irq (24). -* For PCIe Bus 3 any slot: - - default => IRQ = pcie2_irq (25). - -Because of this, the function 'of_irq_parse_and_map_pci' cannot -be used and we need to change device tree information from using -the 'interrupt-map' and 'interrupt-map-mask' properties into an -'interrupts' property to be able to get irq information from the -ports using the 'platform_get_irq' and storing an 'irq-map' into -the pcie driver data node to properly map correct irq using a -new 'mt7621_map_irq' function where this map will be read and the -correct irq returned. - -Fixes: 46d093124df4 ("staging: mt7621-pci: improve interrupt mapping") -Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com> -Link: https://lore.kernel.org/r/20200413055942.2714-1-sergio.paracuellos@gmail.com -Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> ---- - drivers/staging/mt7621-dts/mt7621.dtsi | 9 +++---- - drivers/staging/mt7621-pci/pci-mt7621.c | 36 +++++++++++++++++++++++-- - 2 files changed, 38 insertions(+), 7 deletions(-) - ---- a/drivers/staging/mt7621-pci/pci-mt7621.c -+++ b/drivers/staging/mt7621-pci/pci-mt7621.c -@@ -97,6 +97,7 @@ - * @pcie_rst: pointer to port reset control - * @gpio_rst: gpio reset - * @slot: port slot -+ * @irq: GIC irq - * @enabled: indicates if port is enabled - */ - struct mt7621_pcie_port { -@@ -107,6 +108,7 @@ struct mt7621_pcie_port { - struct reset_control *pcie_rst; - struct gpio_desc *gpio_rst; - u32 slot; -+ int irq; - bool enabled; - }; - -@@ -120,6 +122,7 @@ struct mt7621_pcie_port { - * @dev: Pointer to PCIe device - * @io_map_base: virtual memory base address for io - * @ports: pointer to PCIe port information -+ * @irq_map: irq mapping info according pcie link status - * @resets_inverted: depends on chip revision - * reset lines are inverted. - */ -@@ -135,6 +138,7 @@ struct mt7621_pcie { - } offset; - unsigned long io_map_base; - struct list_head ports; -+ int irq_map[PCIE_P2P_MAX]; - bool resets_inverted; - }; - -@@ -279,6 +283,16 @@ static void setup_cm_memory_region(struc - } - } - -+static int mt7621_map_irq(const struct pci_dev *pdev, u8 slot, u8 pin) -+{ -+ struct mt7621_pcie *pcie = pdev->bus->sysdata; -+ struct device *dev = pcie->dev; -+ int irq = pcie->irq_map[slot]; -+ -+ dev_info(dev, "bus=%d slot=%d irq=%d\n", pdev->bus->number, slot, irq); -+ return irq; -+} -+ - static int mt7621_pci_parse_request_of_pci_ranges(struct mt7621_pcie *pcie) - { - struct device *dev = pcie->dev; -@@ -330,6 +344,7 @@ static int mt7621_pcie_parse_port(struct - { - struct mt7621_pcie_port *port; - struct device *dev = pcie->dev; -+ struct platform_device *pdev = to_platform_device(dev); - struct device_node *pnode = dev->of_node; - struct resource regs; - char name[10]; -@@ -371,6 +386,12 @@ static int mt7621_pcie_parse_port(struct - port->slot = slot; - port->pcie = pcie; - -+ port->irq = platform_get_irq(pdev, slot); -+ if (port->irq < 0) { -+ dev_err(dev, "Failed to get IRQ for PCIe%d\n", slot); -+ return -ENXIO; -+ } -+ - INIT_LIST_HEAD(&port->list); - list_add_tail(&port->list, &pcie->ports); - -@@ -585,13 +606,15 @@ static int mt7621_pcie_init_virtual_brid - { - u32 pcie_link_status = 0; - u32 n; -- int i; -+ int i = 0; - u32 p2p_br_devnum[PCIE_P2P_MAX]; -+ int irqs[PCIE_P2P_MAX]; - struct mt7621_pcie_port *port; - - list_for_each_entry(port, &pcie->ports, list) { - u32 slot = port->slot; - -+ irqs[i++] = port->irq; - if (port->enabled) - pcie_link_status |= BIT(slot); - } -@@ -614,6 +637,15 @@ static int mt7621_pcie_init_virtual_brid - (p2p_br_devnum[1] << PCIE_P2P_BR_DEVNUM1_SHIFT) | - (p2p_br_devnum[2] << PCIE_P2P_BR_DEVNUM2_SHIFT)); - -+ /* Assign IRQs */ -+ n = 0; -+ for (i = 0; i < PCIE_P2P_MAX; i++) -+ if (pcie_link_status & BIT(i)) -+ pcie->irq_map[n++] = irqs[i]; -+ -+ for (i = n; i < PCIE_P2P_MAX; i++) -+ pcie->irq_map[i] = -1; -+ - return 0; - } - -@@ -638,7 +670,7 @@ static int mt7621_pcie_register_host(str - host->busnr = pcie->busn.start; - host->dev.parent = pcie->dev; - host->ops = &mt7621_pci_ops; -- host->map_irq = of_irq_parse_and_map_pci; -+ host->map_irq = mt7621_map_irq; - host->swizzle_irq = pci_common_swizzle; - host->sysdata = pcie; - |