diff mbox series

[v18,10/20] PCI: tegra194: Drop PCI_EXP_LNKSTA_NLW setting.

Message ID 20230721074452.65545-11-yoshihiro.shimoda.uh@renesas.com (mailing list archive)
State Superseded
Delegated to: Krzysztof Wilczyński
Headers show
Series PCI: rcar-gen4: Add R-Car Gen4 PCIe support | expand

Commit Message

Yoshihiro Shimoda July 21, 2023, 7:44 a.m. UTC 
dw_pcie_setup() will set PCI_EXP_LNKSTA_NLW to PCI_EXP_LNKCAP register
so that drop such setting from tegra_pcie_dw_host_init().

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
---
 drivers/pci/controller/dwc/pcie-tegra194.c | 6 ------
 1 file changed, 6 deletions(-)

Comments

Manivannan Sadhasivam July 24, 2023, 11:29 a.m. UTC | #1 
Remove full stop from subject.

On Fri, Jul 21, 2023 at 04:44:42PM +0900, Yoshihiro Shimoda wrote:
> dw_pcie_setup() will set PCI_EXP_LNKSTA_NLW to PCI_EXP_LNKCAP register
> so that drop such setting from tegra_pcie_dw_host_init().
> 

How about,

dw_pcie_setup() is already setting PCI_EXP_LNKCAP_MLW to pcie->num_lanes in the
PCI_EXP_LNKCAP register for programming maximum link width. Hence, remove the
redundant setting here.

> Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>

With that,

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

- Mani

> Cc: Thierry Reding <thierry.reding@gmail.com>
> Cc: Jonathan Hunter <jonathanh@nvidia.com>
> Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
> ---
>  drivers/pci/controller/dwc/pcie-tegra194.c | 6 ------
>  1 file changed, 6 deletions(-)
> 
> diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c
> index 85cc64324efd..3bba174b1701 100644
> --- a/drivers/pci/controller/dwc/pcie-tegra194.c
> +++ b/drivers/pci/controller/dwc/pcie-tegra194.c
> @@ -922,12 +922,6 @@ static int tegra_pcie_dw_host_init(struct dw_pcie_rp *pp)
>  		AMBA_ERROR_RESPONSE_CRS_SHIFT);
>  	dw_pcie_writel_dbi(pci, PORT_LOGIC_AMBA_ERROR_RESPONSE_DEFAULT, val);
>  
> -	/* Configure Max lane width from DT */
> -	val = dw_pcie_readl_dbi(pci, pcie->pcie_cap_base + PCI_EXP_LNKCAP);
> -	val &= ~PCI_EXP_LNKCAP_MLW;
> -	val |= (pcie->num_lanes << PCI_EXP_LNKSTA_NLW_SHIFT);
> -	dw_pcie_writel_dbi(pci, pcie->pcie_cap_base + PCI_EXP_LNKCAP, val);
> -
>  	/* Clear Slot Clock Configuration bit if SRNS configuration */
>  	if (pcie->enable_srns) {
>  		val_16 = dw_pcie_readw_dbi(pci, pcie->pcie_cap_base +
> -- 
> 2.25.1
>
Yoshihiro Shimoda July 26, 2023, 2:26 a.m. UTC | #2 
Hi Manivannan,

> From: Manivannan Sadhasivam, Sent: Monday, July 24, 2023 8:29 PM
> 
> Remove full stop from subject.

I will remove "." from the subject.

> On Fri, Jul 21, 2023 at 04:44:42PM +0900, Yoshihiro Shimoda wrote:
> > dw_pcie_setup() will set PCI_EXP_LNKSTA_NLW to PCI_EXP_LNKCAP register
> > so that drop such setting from tegra_pcie_dw_host_init().
> >
> 
> How about,
> 
> dw_pcie_setup() is already setting PCI_EXP_LNKCAP_MLW to pcie->num_lanes in the
> PCI_EXP_LNKCAP register for programming maximum link width. Hence, remove the
> redundant setting here.

Thank you for the suggestion. I'll fix the description.

> > Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
> 
> With that,
> 
> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

Thank you for your review!

Best regards,
Yoshihiro Shimoda

> - Mani
> 
> > Cc: Thierry Reding <thierry.reding@gmail.com>
> > Cc: Jonathan Hunter <jonathanh@nvidia.com>
> > Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
> > ---
> >  drivers/pci/controller/dwc/pcie-tegra194.c | 6 ------
> >  1 file changed, 6 deletions(-)
> >
> > diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c
> > index 85cc64324efd..3bba174b1701 100644
> > --- a/drivers/pci/controller/dwc/pcie-tegra194.c
> > +++ b/drivers/pci/controller/dwc/pcie-tegra194.c
> > @@ -922,12 +922,6 @@ static int tegra_pcie_dw_host_init(struct dw_pcie_rp *pp)
> >  		AMBA_ERROR_RESPONSE_CRS_SHIFT);
> >  	dw_pcie_writel_dbi(pci, PORT_LOGIC_AMBA_ERROR_RESPONSE_DEFAULT, val);
> >
> > -	/* Configure Max lane width from DT */
> > -	val = dw_pcie_readl_dbi(pci, pcie->pcie_cap_base + PCI_EXP_LNKCAP);
> > -	val &= ~PCI_EXP_LNKCAP_MLW;
> > -	val |= (pcie->num_lanes << PCI_EXP_LNKSTA_NLW_SHIFT);
> > -	dw_pcie_writel_dbi(pci, pcie->pcie_cap_base + PCI_EXP_LNKCAP, val);
> > -
> >  	/* Clear Slot Clock Configuration bit if SRNS configuration */
> >  	if (pcie->enable_srns) {
> >  		val_16 = dw_pcie_readw_dbi(pci, pcie->pcie_cap_base +
> > --
> > 2.25.1
> >
> 
> --
> மணிவண்ணன் சதாசிவம்
diff mbox series

Patch

diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c
index 85cc64324efd..3bba174b1701 100644
--- a/drivers/pci/controller/dwc/pcie-tegra194.c
+++ b/drivers/pci/controller/dwc/pcie-tegra194.c
@@ -922,12 +922,6 @@  static int tegra_pcie_dw_host_init(struct dw_pcie_rp *pp)
 		AMBA_ERROR_RESPONSE_CRS_SHIFT);
 	dw_pcie_writel_dbi(pci, PORT_LOGIC_AMBA_ERROR_RESPONSE_DEFAULT, val);
 
-	/* Configure Max lane width from DT */
-	val = dw_pcie_readl_dbi(pci, pcie->pcie_cap_base + PCI_EXP_LNKCAP);
-	val &= ~PCI_EXP_LNKCAP_MLW;
-	val |= (pcie->num_lanes << PCI_EXP_LNKSTA_NLW_SHIFT);
-	dw_pcie_writel_dbi(pci, pcie->pcie_cap_base + PCI_EXP_LNKCAP, val);
-
 	/* Clear Slot Clock Configuration bit if SRNS configuration */
 	if (pcie->enable_srns) {
 		val_16 = dw_pcie_readw_dbi(pci, pcie->pcie_cap_base +