[PATCH v3 04/13] PCI: imx6: Using "linux,pci-domain" as slot ID

[Frank Li <Frank.Li@nxp.com>]

Avoid use get slot id by compared with register physical address. If there
are more than 2 slots, compared logic will become complex.

Signed-off-by: Frank Li <Frank.Li@nxp.com>
---

Notes:
    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 | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 509d459bdc5a1..548034151ee1a 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)
@@ -1327,6 +1328,12 @@ static int imx6_pcie_probe(struct platform_device *pdev)
 					     "Failed to get PCIEPHY reset control\n");
 	}
 
+	/* 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;
+
 	switch (imx6_pcie->drvdata->variant) {
 	case IMX7D:
 		if (dbi_base->start == IMX8MQ_PCIE2_BASE_ADDR)
-- 
2.34.1