diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0786-PCI-brcmstb-Add-DT-property-to-control-L1SS.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0786-PCI-brcmstb-Add-DT-property-to-control-L1SS.patch | 79 |
1 files changed, 0 insertions, 79 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0786-PCI-brcmstb-Add-DT-property-to-control-L1SS.patch b/target/linux/bcm27xx/patches-5.4/950-0786-PCI-brcmstb-Add-DT-property-to-control-L1SS.patch deleted file mode 100644 index 1d54cff647..0000000000 --- a/target/linux/bcm27xx/patches-5.4/950-0786-PCI-brcmstb-Add-DT-property-to-control-L1SS.patch +++ /dev/null @@ -1,79 +0,0 @@ -From faca7230ba711f7f966cd51bf46f83c5848a8623 Mon Sep 17 00:00:00 2001 -From: Phil Elwell <phil@raspberrypi.com> -Date: Thu, 11 Jun 2020 09:57:03 +0100 -Subject: [PATCH] PCI: brcmstb: Add DT property to control L1SS - -The BRCM PCIe block has controls to enable control of the CLKREQ# -signal by the L1SS, and to gate the refclk with the CLKREQ# input. -These controls are mutually exclusive - the upstream code sets the -latter, but some use cases require the former. - -Add a Device Tree property - brcm,enable-l1ss - to switch to the -L1SS configuration. - -Signed-off-by: Phil Elwell <phil@raspberrypi.com> ---- - drivers/pci/controller/pcie-brcmstb.c | 30 ++++++++++++++++++++------- - 1 file changed, 23 insertions(+), 7 deletions(-) - ---- a/drivers/pci/controller/pcie-brcmstb.c -+++ b/drivers/pci/controller/pcie-brcmstb.c -@@ -102,8 +102,9 @@ - PCIE_MISC_CPU_2_PCIE_MEM_WIN0_LIMIT_HI + ((win) * 8) - - #define PCIE_MISC_HARD_PCIE_HARD_DEBUG 0x4204 --#define PCIE_MISC_HARD_PCIE_HARD_DEBUG_CLKREQ_DEBUG_ENABLE_MASK 0x2 --#define PCIE_MISC_HARD_PCIE_HARD_DEBUG_SERDES_IDDQ_MASK 0x08000000 -+#define PCIE_MISC_HARD_PCIE_HARD_DEBUG_CLKREQ_DEBUG_ENABLE_MASK BIT(1) -+#define PCIE_MISC_HARD_PCIE_HARD_DEBUG_CLKREQ_L1SS_ENABLE_MASK BIT(21) -+#define PCIE_MISC_HARD_PCIE_HARD_DEBUG_SERDES_IDDQ_MASK BIT(27) - - #define PCIE_MSI_INTR2_STATUS 0x4500 - #define PCIE_MSI_INTR2_CLR 0x4508 -@@ -170,6 +171,7 @@ struct brcm_pcie { - struct pci_bus *root_bus; - struct device_node *np; - bool ssc; -+ bool l1ss; - int gen; - u64 msi_target_addr; - struct brcm_msi *msi; -@@ -834,12 +836,25 @@ static int brcm_pcie_setup(struct brcm_p - PCIE_RC_CFG_VENDOR_VENDOR_SPECIFIC_REG1_ENDIAN_MODE_BAR2_MASK); - writel(tmp, base + PCIE_RC_CFG_VENDOR_VENDOR_SPECIFIC_REG1); - -- /* -- * Refclk from RC should be gated with CLKREQ# input when ASPM L0s,L1 -- * is enabled => setting the CLKREQ_DEBUG_ENABLE field to 1. -- */ - tmp = readl(base + PCIE_MISC_HARD_PCIE_HARD_DEBUG); -- tmp |= PCIE_MISC_HARD_PCIE_HARD_DEBUG_CLKREQ_DEBUG_ENABLE_MASK; -+ if (pcie->l1ss) { -+ /* -+ * Enable CLKREQ# signalling include L1 Substate control of -+ * the CLKREQ# signal and the external reference clock buffer. -+ * meet requirement for Endpoints that require CLKREQ# -+ * assertion to clock active within 400ns. -+ */ -+ tmp &= ~PCIE_MISC_HARD_PCIE_HARD_DEBUG_CLKREQ_DEBUG_ENABLE_MASK; -+ tmp |= PCIE_MISC_HARD_PCIE_HARD_DEBUG_CLKREQ_L1SS_ENABLE_MASK; -+ } else { -+ /* -+ * Refclk from RC should be gated with CLKREQ# input when -+ * ASPM L0s,L1 is enabled => setting the CLKREQ_DEBUG_ENABLE -+ * field to 1. -+ */ -+ tmp &= ~PCIE_MISC_HARD_PCIE_HARD_DEBUG_CLKREQ_L1SS_ENABLE_MASK; -+ tmp |= PCIE_MISC_HARD_PCIE_HARD_DEBUG_CLKREQ_DEBUG_ENABLE_MASK; -+ } - writel(tmp, base + PCIE_MISC_HARD_PCIE_HARD_DEBUG); - - return 0; -@@ -944,6 +959,7 @@ static int brcm_pcie_probe(struct platfo - pcie->gen = (ret < 0) ? 0 : ret; - - pcie->ssc = of_property_read_bool(np, "brcm,enable-ssc"); -+ pcie->l1ss = of_property_read_bool(np, "brcm,enable-l1ss"); - - ret = pci_parse_request_of_pci_ranges(pcie->dev, &bridge->windows, - &bridge->dma_ranges, NULL); |