[PATCH v5 05/16] PCI: imx6: Using "linux,pci-domain" as slot ID
From: Frank Li <Frank.Li@nxp.com>
Date: 2023-12-20 21:37:10
Also in:
imx, linux-devicetree, linux-pci, lkml
Subsystem:
pci driver for imx6, pci native host bridge and endpoint drivers, pci subsystem, the rest · Maintainers:
Richard Zhu, Lucas Stach, Lorenzo Pieralisi, Krzysztof Wilczyński, Manivannan Sadhasivam, Bjorn Helgaas, Linus Torvalds
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 commit:
commit (c0b70f05c87f3b arm64: dts: imx8mq: use_dt_domains for pci node).
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 | 17 +++++++++--------
1 file changed, 9 insertions(+), 8 deletions(-)
diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 294f61a9c6fd9..332c392f8e5bc 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 +1279,14 @@ 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 == -EINVAL) + imx6_pcie->controller_id = 0; + else if (imx6_pcie->controller_id < 0) + return dev_err_probe(dev, imx6_pcie->controller_id, + "linux,pci-domain have wrong value\n"); /* Grab turnoff reset */ imx6_pcie->turnoff_reset = devm_reset_control_get_optional_exclusive(dev, "turnoff");
--
2.34.1
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