diff options
| author |   Rob Herring <robh@kernel.org> | 2020-08-20 21:54:10 -0600 |
|---|---|---|
| committer |   Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> | 2020-09-08 16:37:02 +0100 |
| commit | fb7652327101cdcaceae472c3b87fc5c8de28abe (patch) | |
| tree | 97bff200718ccb427e93a97bedd36ea2b011c22f /drivers/pci/controller | |
| parent | PCI: dwc/qcom: Use common PCI register definitions (diff) | |
| download | linux-dev-fb7652327101cdcaceae472c3b87fc5c8de28abe.tar.xz linux-dev-fb7652327101cdcaceae472c3b87fc5c8de28abe.zip | |
PCI: dwc: Remove hardcoded PCI_CAP_ID_EXP offset
While the Designware controller appears to hard code the PCI_CAP_ID_EXP
capability register at 0x70, there's no need to hard code this in the
driver as it is discoverable.
Link: https://lore.kernel.org/r/20200821035420.380495-31-robh@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Kishon Vijay Abraham I <kishon@ti.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Murali Karicheri <m-karicheri2@ti.com>
Cc: Pratyush Anand <pratyush.anand@gmail.com>
Cc: linux-omap@vger.kernel.org
Diffstat (limited to 'drivers/pci/controller')
| -rw-r--r-- | drivers/pci/controller/dwc/pci-dra7xx.c | 4 | ||||
| -rw-r--r-- | drivers/pci/controller/dwc/pci-keystone.c | 11 | ||||
| -rw-r--r-- | drivers/pci/controller/dwc/pcie-spear13xx.c | 4 |
3 files changed, 7 insertions, 12 deletions
diff --git a/drivers/pci/controller/dwc/pci-dra7xx.c b/drivers/pci/controller/dwc/pci-dra7xx.c index dc387724cf08..d42e0664f378 100644 --- a/drivers/pci/controller/dwc/pci-dra7xx.c +++ b/drivers/pci/controller/dwc/pci-dra7xx.c @@ -73,8 +73,6 @@ #define LINK_UP BIT(16) #define DRA7XX_CPU_TO_BUS_ADDR 0x0FFFFFFF -#define EXP_CAP_ID_OFFSET 0x70 - #define PCIECTRL_TI_CONF_INTX_ASSERT 0x0124 #define PCIECTRL_TI_CONF_INTX_DEASSERT 0x0128 @@ -142,7 +140,7 @@ static int dra7xx_pcie_establish_link(struct dw_pcie *pci) struct dra7xx_pcie *dra7xx = to_dra7xx_pcie(pci); struct device *dev = pci->dev; u32 reg; - u32 exp_cap_off = EXP_CAP_ID_OFFSET; + u32 exp_cap_off = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP); if (dw_pcie_link_up(pci)) { dev_err(dev, "link is already up\n"); diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c index 0fe792f6c253..39a5a72de340 100644 --- a/drivers/pci/controller/dwc/pci-keystone.c +++ b/drivers/pci/controller/dwc/pci-keystone.c @@ -96,8 +96,6 @@ #define LEG_EP 0x1 #define RC 0x2 -#define EXP_CAP_ID_OFFSET 0x70 - #define KS_PCIE_SYSCLOCKOUTEN BIT(0) #define AM654_PCIE_DEV_TYPE_MASK 0x3 @@ -1125,22 +1123,23 @@ static int ks_pcie_am654_set_mode(struct device *dev, static void ks_pcie_set_link_speed(struct dw_pcie *pci, int link_speed) { u32 val; + u32 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP); dw_pcie_dbi_ro_wr_en(pci); - val = dw_pcie_readl_dbi(pci, EXP_CAP_ID_OFFSET + PCI_EXP_LNKCAP); + val = dw_pcie_readl_dbi(pci, offset + PCI_EXP_LNKCAP); if ((val & PCI_EXP_LNKCAP_SLS) != link_speed) { val &= ~((u32)PCI_EXP_LNKCAP_SLS); val |= link_speed; - dw_pcie_writel_dbi(pci, EXP_CAP_ID_OFFSET + PCI_EXP_LNKCAP, + dw_pcie_writel_dbi(pci, offset + PCI_EXP_LNKCAP, val); } - val = dw_pcie_readl_dbi(pci, EXP_CAP_ID_OFFSET + PCI_EXP_LNKCTL2); + val = dw_pcie_readl_dbi(pci, offset + PCI_EXP_LNKCTL2); if ((val & PCI_EXP_LNKCAP_SLS) != link_speed) { val &= ~((u32)PCI_EXP_LNKCAP_SLS); val |= link_speed; - dw_pcie_writel_dbi(pci, EXP_CAP_ID_OFFSET + PCI_EXP_LNKCTL2, + dw_pcie_writel_dbi(pci, offset + PCI_EXP_LNKCTL2, val); } diff --git a/drivers/pci/controller/dwc/pcie-spear13xx.c b/drivers/pci/controller/dwc/pcie-spear13xx.c index 62846562da0b..056c94541a22 100644 --- a/drivers/pci/controller/dwc/pcie-spear13xx.c +++ b/drivers/pci/controller/dwc/pcie-spear13xx.c @@ -65,8 +65,6 @@ struct pcie_app_reg { /* CR6 */ #define MSI_CTRL_INT (1 << 26) -#define EXP_CAP_ID_OFFSET 0x70 - #define to_spear13xx_pcie(x) dev_get_drvdata((x)->dev) static int spear13xx_pcie_establish_link(struct spear13xx_pcie *spear13xx_pcie) @@ -75,7 +73,7 @@ static int spear13xx_pcie_establish_link(struct spear13xx_pcie *spear13xx_pcie) struct pcie_port *pp = &pci->pp; struct pcie_app_reg *app_reg = spear13xx_pcie->app_base; u32 val; - u32 exp_cap_off = EXP_CAP_ID_OFFSET; + u32 exp_cap_off = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP); if (dw_pcie_link_up(pci)) { dev_err(pci->dev, "link already up\n"); |