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PCI: aardvark: Refactor unmasking summary MSI interrupt

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Refactor the masking of ISR0/1 Sources and unmasking of summary MSI interrupt
so that it corresponds to the comments:
- first mask all ISR0/1
- then unmask all MSIs
- then unmask summary MSI interrupt

Link: https://lore.kernel.org/r/20220110015018.26359-10-kabel@kernel.org
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
This commit is contained in:
Pali Rohár 2022-01-10 02:50:04 +01:00 committed by Lorenzo Pieralisi
parent 222af78532
commit 4689c09163
1 changed files with 6 additions and 4 deletions
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10
drivers/pci/controller/pci-aardvark.c
View file

@ -571,15 +571,17 @@ static void advk_pcie_setup_hw(struct advk_pcie *pcie)
advk_writel(pcie, PCIE_IRQ_ALL_MASK, HOST_CTRL_INT_STATUS_REG);
/* Disable All ISR0/1 Sources */
reg = PCIE_ISR0_ALL_MASK;
reg &= ~PCIE_ISR0_MSI_INT_PENDING;
advk_writel(pcie, reg, PCIE_ISR0_MASK_REG);
advk_writel(pcie, PCIE_ISR0_ALL_MASK, PCIE_ISR0_MASK_REG);
advk_writel(pcie, PCIE_ISR1_ALL_MASK, PCIE_ISR1_MASK_REG);
/* Unmask all MSIs */
advk_writel(pcie, ~(u32)PCIE_MSI_ALL_MASK, PCIE_MSI_MASK_REG);
/* Unmask summary MSI interrupt */
reg = advk_readl(pcie, PCIE_ISR0_MASK_REG);
reg &= ~PCIE_ISR0_MSI_INT_PENDING;
advk_writel(pcie, reg, PCIE_ISR0_MASK_REG);
/* Enable summary interrupt for GIC SPI source */
reg = PCIE_IRQ_ALL_MASK & (~PCIE_IRQ_ENABLE_INTS_MASK);
advk_writel(pcie, reg, HOST_CTRL_INT_MASK_REG);