diff options
Diffstat (limited to 'target/linux/layerscape/patches-4.4/0051-PCI-designware-Ensure-ATU-is-enabled-before-IO-conf-.patch')
| -rw-r--r-- | target/linux/layerscape/patches-4.4/0051-PCI-designware-Ensure-ATU-is-enabled-before-IO-conf-.patch | 43 |
1 files changed, 0 insertions, 43 deletions
diff --git a/target/linux/layerscape/patches-4.4/0051-PCI-designware-Ensure-ATU-is-enabled-before-IO-conf-.patch b/target/linux/layerscape/patches-4.4/0051-PCI-designware-Ensure-ATU-is-enabled-before-IO-conf-.patch deleted file mode 100644 index c670dac..0000000 --- a/target/linux/layerscape/patches-4.4/0051-PCI-designware-Ensure-ATU-is-enabled-before-IO-conf-.patch +++ /dev/null @@ -1,43 +0,0 @@ -From 7f434723cdb6823443330cd4847d5c3b8dd30bd7 Mon Sep 17 00:00:00 2001 -From: Stanimir Varbanov <stanimir.varbanov@linaro.org> -Date: Fri, 18 Dec 2015 14:38:55 +0200 -Subject: [PATCH 51/70] PCI: designware: Ensure ATU is enabled before IO/conf - space accesses - -Read back the ATU CR2 register to ensure ATU programming is effective -before any subsequent I/O or config space accesses. - -Without this, PCI device enumeration is unreliable. - -[bhelgaas: changelog, comment] -Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org> -Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> -Acked-by: Pratyush Anand <pratyush.anand@gmail.com> ---- - drivers/pci/host/pcie-designware.c | 8 ++++++++ - 1 file changed, 8 insertions(+) - ---- a/drivers/pci/host/pcie-designware.c -+++ b/drivers/pci/host/pcie-designware.c -@@ -154,6 +154,8 @@ static int dw_pcie_wr_own_conf(struct pc - static void dw_pcie_prog_outbound_atu(struct pcie_port *pp, int index, - int type, u64 cpu_addr, u64 pci_addr, u32 size) - { -+ u32 val; -+ - dw_pcie_writel_rc(pp, PCIE_ATU_REGION_OUTBOUND | index, - PCIE_ATU_VIEWPORT); - dw_pcie_writel_rc(pp, lower_32_bits(cpu_addr), PCIE_ATU_LOWER_BASE); -@@ -164,6 +166,12 @@ static void dw_pcie_prog_outbound_atu(st - dw_pcie_writel_rc(pp, upper_32_bits(pci_addr), PCIE_ATU_UPPER_TARGET); - dw_pcie_writel_rc(pp, type, PCIE_ATU_CR1); - dw_pcie_writel_rc(pp, PCIE_ATU_ENABLE, PCIE_ATU_CR2); -+ -+ /* -+ * Make sure ATU enable takes effect before any subsequent config -+ * and I/O accesses. -+ */ -+ dw_pcie_readl_rc(pp, PCIE_ATU_CR2, &val); - } - - static struct irq_chip dw_msi_irq_chip = { |