| Message ID | 20231217051210.754832-5-Frank.Li@nxp.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | PCI: imx6: Clean up and add imx95 pci support | expand |
On Sun, Dec 17, 2023 at 12:11:59AM -0500, Frank Li wrote: > Avoid use get slot id by compared with register physical address. If there > are more than 2 slots, compared logic will become complex. > > "linux,pci-domain" already exist at dts since first commit: > commit (9e65987b9584d arm64: dts: imx8mp: Add iMX8MP PCIe support). > > So it is safe to remove compare basic address code: You should mark this property as "required" in the binding. Otherwise, drivers cannot make assumptions. > ... > if (dbi_base->start == IMX8MQ_PCIE2_BASE_ADDR) > imx6_pcie->controller_id = 1; > ... > > Signed-off-by: Frank Li <Frank.Li@nxp.com> > --- > > Notes: > Change from v3 to v4 > - remove compare basic address logic > Change from v2 to v3 > - none > Change from v1 to v2 > - fix of_get_pci_domain_nr return value check logic > > drivers/pci/controller/dwc/pci-imx6.c | 14 ++++++-------- > 1 file changed, 6 insertions(+), 8 deletions(-) > > diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c > index c1fb38a2ebeb6..7145947e21d92 100644 > --- a/drivers/pci/controller/dwc/pci-imx6.c > +++ b/drivers/pci/controller/dwc/pci-imx6.c > @@ -33,6 +33,7 @@ > #include <linux/pm_domain.h> > #include <linux/pm_runtime.h> > > +#include "../../pci.h" > #include "pcie-designware.h" > > #define IMX8MQ_GPR_PCIE_REF_USE_PAD BIT(9) > @@ -40,7 +41,6 @@ > #define IMX8MQ_GPR_PCIE_CLK_REQ_OVERRIDE BIT(11) > #define IMX8MQ_GPR_PCIE_VREG_BYPASS BIT(12) > #define IMX8MQ_GPR12_PCIE2_CTRL_DEVICE_TYPE GENMASK(11, 8) > -#define IMX8MQ_PCIE2_BASE_ADDR 0x33c00000 > > #define to_imx6_pcie(x) dev_get_drvdata((x)->dev) > > @@ -1279,13 +1279,11 @@ static int imx6_pcie_probe(struct platform_device *pdev) > "Failed to get PCIEPHY reset control\n"); > } > > - switch (imx6_pcie->drvdata->variant) { > - case IMX7D: > - if (dbi_base->start == IMX8MQ_PCIE2_BASE_ADDR) > - imx6_pcie->controller_id = 1; > - default: > - break; > - } > + /* Using linux,pci-domain as PCI slot id */ > + imx6_pcie->controller_id = of_get_pci_domain_nr(node); > + /* If there are not "linux,pci-domain" in dts file, means only 1 controller */ Only -EINVAL means the property is not present, other error codes means property is present, but is not in good shape. - Mani > + if (imx6_pcie->controller_id < 0) > + imx6_pcie->controller_id = 0; > > /* Grab turnoff reset */ > imx6_pcie->turnoff_reset = devm_reset_control_get_optional_exclusive(dev, "turnoff"); > -- > 2.34.1 >
diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index c1fb38a2ebeb6..7145947e21d92 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -33,6 +33,7 @@ #include <linux/pm_domain.h> #include <linux/pm_runtime.h> +#include "../../pci.h" #include "pcie-designware.h" #define IMX8MQ_GPR_PCIE_REF_USE_PAD BIT(9) @@ -40,7 +41,6 @@ #define IMX8MQ_GPR_PCIE_CLK_REQ_OVERRIDE BIT(11) #define IMX8MQ_GPR_PCIE_VREG_BYPASS BIT(12) #define IMX8MQ_GPR12_PCIE2_CTRL_DEVICE_TYPE GENMASK(11, 8) -#define IMX8MQ_PCIE2_BASE_ADDR 0x33c00000 #define to_imx6_pcie(x) dev_get_drvdata((x)->dev) @@ -1279,13 +1279,11 @@ static int imx6_pcie_probe(struct platform_device *pdev) "Failed to get PCIEPHY reset control\n"); } - switch (imx6_pcie->drvdata->variant) { - case IMX7D: - if (dbi_base->start == IMX8MQ_PCIE2_BASE_ADDR) - imx6_pcie->controller_id = 1; - default: - break; - } + /* Using linux,pci-domain as PCI slot id */ + imx6_pcie->controller_id = of_get_pci_domain_nr(node); + /* If there are not "linux,pci-domain" in dts file, means only 1 controller */ + if (imx6_pcie->controller_id < 0) + imx6_pcie->controller_id = 0; /* Grab turnoff reset */ imx6_pcie->turnoff_reset = devm_reset_control_get_optional_exclusive(dev, "turnoff");
Avoid use get slot id by compared with register physical address. If there are more than 2 slots, compared logic will become complex. "linux,pci-domain" already exist at dts since first commit: commit (9e65987b9584d arm64: dts: imx8mp: Add iMX8MP PCIe support). So it is safe to remove compare basic address code: ... if (dbi_base->start == IMX8MQ_PCIE2_BASE_ADDR) imx6_pcie->controller_id = 1; ... Signed-off-by: Frank Li <Frank.Li@nxp.com> --- Notes: Change from v3 to v4 - remove compare basic address logic Change from v2 to v3 - none Change from v1 to v2 - fix of_get_pci_domain_nr return value check logic drivers/pci/controller/dwc/pci-imx6.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-)