diff mbox series

[v7,05/16] PCI: imx6: Using "linux,pci-domain" as slot ID

Message ID 20231227182727.1747435-6-Frank.Li@nxp.com
State Superseded
Headers show
Series [v7,01/16] PCI: imx6: Simplify clock handling by using bulk_clk_*() function | expand

Commit Message

Frank Li Dec. 27, 2023, 6:27 p.m. UTC
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(-)

Comments

Manivannan Sadhasivam Jan. 7, 2024, 3:22 a.m. UTC | #1
On Wed, Dec 27, 2023 at 01:27:16PM -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 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>

One comment below. With that fixed,

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

> ---
> 
> 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 there are no "linux,pci-domain" property specified in DT, then assume only
one controller is available."

- Mani

> +	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
>
diff mbox series

Patch

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");