| Message ID | 20171108091956.8537-1-marek.vasut+renesas@gmail.com |
|---|---|
| State | Changes Requested |
| Headers | show |
| Series | PCI: rcar: Use runtime PM to control controller clock | expand |
Hi Marek, On Wed, Nov 8, 2017 at 10:19 AM, Marek Vasut <marek.vasut@gmail.com> wrote: > From: Dien Pham <dien.pham.ry@rvc.renesas.com> > > The controller clock can be switched off during suspend/resume, > let runtime PM take care of that. > > Signed-off-by: Dien Pham <dien.pham.ry@rvc.renesas.com> > Signed-off-by: Hien Dang <hien.dang.eb@renesas.com> > Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com> Thanks for your patch! > --- a/drivers/pci/host/pcie-rcar.c > +++ b/drivers/pci/host/pcie-rcar.c > @@ -1126,6 +1115,13 @@ static int rcar_pcie_probe(struct platform_device *pdev) > > rcar_pcie_parse_request_of_pci_ranges(pcie); > > + pm_runtime_enable(pcie->dev); > + err = pm_runtime_get_sync(pcie->dev); > + if (err < 0) { > + dev_err(pcie->dev, "pm_runtime_get_sync failed\n"); > + goto err_pm_disable; > + } > + > err = rcar_pcie_get_resources(pcie); > if (err < 0) { > dev_err(dev, "failed to request resources: %d\n", err); > @@ -1136,13 +1132,6 @@ static int rcar_pcie_probe(struct platform_device *pdev) > if (err) > goto err_free_bridge; > > - pm_runtime_enable(dev); > - err = pm_runtime_get_sync(dev); > - if (err < 0) { > - dev_err(dev, "pm_runtime_get_sync failed\n"); > - goto err_pm_disable; > - } > - > /* Failure to get a link might just be that no cards are inserted */ > hw_init_fn = of_device_get_match_data(dev); > err = hw_init_fn(pcie); As you changed initialization order, cleanup order for error handling below should be updated, too. Apart from that, this patch looks good to me. Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
On 11/08/2017 10:36 AM, Geert Uytterhoeven wrote: > Hi Marek, > > On Wed, Nov 8, 2017 at 10:19 AM, Marek Vasut <marek.vasut@gmail.com> wrote: >> From: Dien Pham <dien.pham.ry@rvc.renesas.com> >> >> The controller clock can be switched off during suspend/resume, >> let runtime PM take care of that. >> >> Signed-off-by: Dien Pham <dien.pham.ry@rvc.renesas.com> >> Signed-off-by: Hien Dang <hien.dang.eb@renesas.com> >> Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com> > > Thanks for your patch! > >> --- a/drivers/pci/host/pcie-rcar.c >> +++ b/drivers/pci/host/pcie-rcar.c > >> @@ -1126,6 +1115,13 @@ static int rcar_pcie_probe(struct platform_device *pdev) >> >> rcar_pcie_parse_request_of_pci_ranges(pcie); >> >> + pm_runtime_enable(pcie->dev); >> + err = pm_runtime_get_sync(pcie->dev); >> + if (err < 0) { >> + dev_err(pcie->dev, "pm_runtime_get_sync failed\n"); >> + goto err_pm_disable; >> + } >> + >> err = rcar_pcie_get_resources(pcie); >> if (err < 0) { >> dev_err(dev, "failed to request resources: %d\n", err); >> @@ -1136,13 +1132,6 @@ static int rcar_pcie_probe(struct platform_device *pdev) >> if (err) >> goto err_free_bridge; >> >> - pm_runtime_enable(dev); >> - err = pm_runtime_get_sync(dev); >> - if (err < 0) { >> - dev_err(dev, "pm_runtime_get_sync failed\n"); >> - goto err_pm_disable; >> - } >> - >> /* Failure to get a link might just be that no cards are inserted */ >> hw_init_fn = of_device_get_match_data(dev); >> err = hw_init_fn(pcie); > > As you changed initialization order, cleanup order for error handling below > should be updated, too. > > Apart from that, this patch looks good to me. Ah, thanks for catching this.
diff --git a/drivers/pci/host/pcie-rcar.c b/drivers/pci/host/pcie-rcar.c index 8b51208875fc..889603783f01 100644 --- a/drivers/pci/host/pcie-rcar.c +++ b/drivers/pci/host/pcie-rcar.c @@ -145,7 +145,6 @@ struct rcar_pcie { void __iomem *base; struct list_head resources; int root_bus_nr; - struct clk *clk; struct clk *bus_clk; struct rcar_msi msi; }; @@ -917,15 +916,6 @@ static int rcar_pcie_get_resources(struct rcar_pcie *pcie) if (IS_ERR(pcie->base)) return PTR_ERR(pcie->base); - pcie->clk = devm_clk_get(dev, "pcie"); - if (IS_ERR(pcie->clk)) { - dev_err(dev, "cannot get platform clock\n"); - return PTR_ERR(pcie->clk); - } - err = clk_prepare_enable(pcie->clk); - if (err) - return err; - pcie->bus_clk = devm_clk_get(dev, "pcie_bus"); if (IS_ERR(pcie->bus_clk)) { dev_err(dev, "cannot get pcie bus clock\n"); @@ -957,7 +947,6 @@ static int rcar_pcie_get_resources(struct rcar_pcie *pcie) err_map_reg: clk_disable_unprepare(pcie->bus_clk); fail_clk: - clk_disable_unprepare(pcie->clk); return err; } @@ -1126,6 +1115,13 @@ static int rcar_pcie_probe(struct platform_device *pdev) rcar_pcie_parse_request_of_pci_ranges(pcie); + pm_runtime_enable(pcie->dev); + err = pm_runtime_get_sync(pcie->dev); + if (err < 0) { + dev_err(pcie->dev, "pm_runtime_get_sync failed\n"); + goto err_pm_disable; + } + err = rcar_pcie_get_resources(pcie); if (err < 0) { dev_err(dev, "failed to request resources: %d\n", err); @@ -1136,13 +1132,6 @@ static int rcar_pcie_probe(struct platform_device *pdev) if (err) goto err_free_bridge; - pm_runtime_enable(dev); - err = pm_runtime_get_sync(dev); - if (err < 0) { - dev_err(dev, "pm_runtime_get_sync failed\n"); - goto err_pm_disable; - } - /* Failure to get a link might just be that no cards are inserted */ hw_init_fn = of_device_get_match_data(dev); err = hw_init_fn(pcie);