From: Alan Douglas <adouglas@cadence.com> To: bhelgaas@google.com, kishon@ti.com, lorenzo.pieralisi@arm.com Cc: linux-pci@vger.kernel.org, devicetree@vger.kernel.org, robh+dt@kernel.org, Alan Douglas <adouglas@cadence.com> Subject: [PATCH 4/5] PCI: cadence: Add Power Management ops for host and EP Date: Mon, 25 Jun 2018 09:30:52 +0100 [thread overview] Message-ID: <1529915453-4633-5-git-send-email-adouglas@cadence.com> (raw) In-Reply-To: <1529915453-4633-1-git-send-email-adouglas@cadence.com> These PM ops will enable/disable the optional PHYs if present. The AXI link-down register in the host driver is now cleared in cdns_pci_map_bus since the link-down bit will be set if the PHY has been disabled. It is not cleared when enabling the PHY, since the link will not yet be up. Signed-off-by: Alan Douglas <adouglas@cadence.com> --- drivers/pci/controller/pcie-cadence-ep.c | 1 + drivers/pci/controller/pcie-cadence-host.c | 3 ++ drivers/pci/controller/pcie-cadence.c | 30 ++++++++++++++++++++++++++++ drivers/pci/controller/pcie-cadence.h | 4 +++ 4 files changed, 38 insertions(+), 0 deletions(-) diff --git a/drivers/pci/controller/pcie-cadence-ep.c b/drivers/pci/controller/pcie-cadence-ep.c index c02f33d..3eabd99 100644 --- a/drivers/pci/controller/pcie-cadence-ep.c +++ b/drivers/pci/controller/pcie-cadence-ep.c @@ -555,6 +555,7 @@ static void cdns_pcie_ep_shutdown(struct platform_device *pdev) .driver = { .name = "cdns-pcie-ep", .of_match_table = cdns_pcie_ep_of_match, + .pm = &cdns_pcie_pm_ops, }, .probe = cdns_pcie_ep_probe, .shutdown = cdns_pcie_ep_shutdown, diff --git a/drivers/pci/controller/pcie-cadence-host.c b/drivers/pci/controller/pcie-cadence-host.c index 36f3109..e3e9b7d 100644 --- a/drivers/pci/controller/pcie-cadence-host.c +++ b/drivers/pci/controller/pcie-cadence-host.c @@ -61,6 +61,8 @@ struct cdns_pcie_rc { /* Check that the link is up */ if (!(cdns_pcie_readl(pcie, CDNS_PCIE_LM_BASE) & 0x1)) return NULL; + /* Clear AXI link-down status */ + cdns_pcie_writel(pcie, CDNS_PCIE_AT_LINKDOWN, 0x0); /* Update Output registers for AXI region 0. */ addr0 = CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_NBITS(12) | @@ -345,6 +347,7 @@ static int cdns_pcie_host_probe(struct platform_device *pdev) .driver = { .name = "cdns-pcie-host", .of_match_table = cdns_pcie_host_of_match, + .pm = &cdns_pcie_pm_ops, }, .probe = cdns_pcie_host_probe, }; diff --git a/drivers/pci/controller/pcie-cadence.c b/drivers/pci/controller/pcie-cadence.c index 2edc126..86f1b00 100644 --- a/drivers/pci/controller/pcie-cadence.c +++ b/drivers/pci/controller/pcie-cadence.c @@ -217,3 +217,33 @@ int cdns_pcie_init_phy(struct device *dev, struct cdns_pcie *pcie) return ret; } + +#ifdef CONFIG_PM_SLEEP +static int cdns_pcie_suspend_noirq(struct device *dev) +{ + struct cdns_pcie *pcie = dev_get_drvdata(dev); + + cdns_pcie_disable_phy(pcie); + + return 0; +} + +static int cdns_pcie_resume_noirq(struct device *dev) +{ + struct cdns_pcie *pcie = dev_get_drvdata(dev); + int ret; + + ret = cdns_pcie_enable_phy(pcie); + if (ret) { + dev_err(dev, "failed to enable phy\n"); + return ret; + } + + return 0; +} +#endif + +const struct dev_pm_ops cdns_pcie_pm_ops = { + SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(cdns_pcie_suspend_noirq, + cdns_pcie_resume_noirq) +}; diff --git a/drivers/pci/controller/pcie-cadence.h b/drivers/pci/controller/pcie-cadence.h index b342c80..ae6bf2a 100644 --- a/drivers/pci/controller/pcie-cadence.h +++ b/drivers/pci/controller/pcie-cadence.h @@ -166,6 +166,9 @@ #define CDNS_PCIE_AT_IB_RP_BAR_ADDR1(bar) \ (CDNS_PCIE_AT_BASE + 0x0804 + (bar) * 0x0008) +/* AXI link down register */ +#define CDNS_PCIE_AT_LINKDOWN (CDNS_PCIE_AT_BASE + 0x0824) + enum cdns_pcie_rp_bar { RP_BAR0, RP_BAR1, @@ -314,5 +317,6 @@ void cdns_pcie_set_outbound_region_for_normal_msg(struct cdns_pcie *pcie, u8 fn, void cdns_pcie_disable_phy(struct cdns_pcie *pcie); int cdns_pcie_enable_phy(struct cdns_pcie *pcie); int cdns_pcie_init_phy(struct device *dev, struct cdns_pcie *pcie); +extern const struct dev_pm_ops cdns_pcie_pm_ops; #endif /* _PCIE_CADENCE_H */ -- 1.7.1
WARNING: multiple messages have this Message-ID (diff)
From: Alan Douglas <adouglas@cadence.com> To: <bhelgaas@google.com>, <kishon@ti.com>, <lorenzo.pieralisi@arm.com> Cc: <linux-pci@vger.kernel.org>, <devicetree@vger.kernel.org>, <robh+dt@kernel.org>, Alan Douglas <adouglas@cadence.com> Subject: [PATCH 4/5] PCI: cadence: Add Power Management ops for host and EP Date: Mon, 25 Jun 2018 09:30:52 +0100 [thread overview] Message-ID: <1529915453-4633-5-git-send-email-adouglas@cadence.com> (raw) In-Reply-To: <1529915453-4633-1-git-send-email-adouglas@cadence.com> These PM ops will enable/disable the optional PHYs if present. The AXI link-down register in the host driver is now cleared in cdns_pci_map_bus since the link-down bit will be set if the PHY has been disabled. It is not cleared when enabling the PHY, since the link will not yet be up. Signed-off-by: Alan Douglas <adouglas@cadence.com> --- drivers/pci/controller/pcie-cadence-ep.c | 1 + drivers/pci/controller/pcie-cadence-host.c | 3 ++ drivers/pci/controller/pcie-cadence.c | 30 ++++++++++++++++++++++++++++ drivers/pci/controller/pcie-cadence.h | 4 +++ 4 files changed, 38 insertions(+), 0 deletions(-) diff --git a/drivers/pci/controller/pcie-cadence-ep.c b/drivers/pci/controller/pcie-cadence-ep.c index c02f33d..3eabd99 100644 --- a/drivers/pci/controller/pcie-cadence-ep.c +++ b/drivers/pci/controller/pcie-cadence-ep.c @@ -555,6 +555,7 @@ static void cdns_pcie_ep_shutdown(struct platform_device *pdev) .driver = { .name = "cdns-pcie-ep", .of_match_table = cdns_pcie_ep_of_match, + .pm = &cdns_pcie_pm_ops, }, .probe = cdns_pcie_ep_probe, .shutdown = cdns_pcie_ep_shutdown, diff --git a/drivers/pci/controller/pcie-cadence-host.c b/drivers/pci/controller/pcie-cadence-host.c index 36f3109..e3e9b7d 100644 --- a/drivers/pci/controller/pcie-cadence-host.c +++ b/drivers/pci/controller/pcie-cadence-host.c @@ -61,6 +61,8 @@ struct cdns_pcie_rc { /* Check that the link is up */ if (!(cdns_pcie_readl(pcie, CDNS_PCIE_LM_BASE) & 0x1)) return NULL; + /* Clear AXI link-down status */ + cdns_pcie_writel(pcie, CDNS_PCIE_AT_LINKDOWN, 0x0); /* Update Output registers for AXI region 0. */ addr0 = CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_NBITS(12) | @@ -345,6 +347,7 @@ static int cdns_pcie_host_probe(struct platform_device *pdev) .driver = { .name = "cdns-pcie-host", .of_match_table = cdns_pcie_host_of_match, + .pm = &cdns_pcie_pm_ops, }, .probe = cdns_pcie_host_probe, }; diff --git a/drivers/pci/controller/pcie-cadence.c b/drivers/pci/controller/pcie-cadence.c index 2edc126..86f1b00 100644 --- a/drivers/pci/controller/pcie-cadence.c +++ b/drivers/pci/controller/pcie-cadence.c @@ -217,3 +217,33 @@ int cdns_pcie_init_phy(struct device *dev, struct cdns_pcie *pcie) return ret; } + +#ifdef CONFIG_PM_SLEEP +static int cdns_pcie_suspend_noirq(struct device *dev) +{ + struct cdns_pcie *pcie = dev_get_drvdata(dev); + + cdns_pcie_disable_phy(pcie); + + return 0; +} + +static int cdns_pcie_resume_noirq(struct device *dev) +{ + struct cdns_pcie *pcie = dev_get_drvdata(dev); + int ret; + + ret = cdns_pcie_enable_phy(pcie); + if (ret) { + dev_err(dev, "failed to enable phy\n"); + return ret; + } + + return 0; +} +#endif + +const struct dev_pm_ops cdns_pcie_pm_ops = { + SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(cdns_pcie_suspend_noirq, + cdns_pcie_resume_noirq) +}; diff --git a/drivers/pci/controller/pcie-cadence.h b/drivers/pci/controller/pcie-cadence.h index b342c80..ae6bf2a 100644 --- a/drivers/pci/controller/pcie-cadence.h +++ b/drivers/pci/controller/pcie-cadence.h @@ -166,6 +166,9 @@ #define CDNS_PCIE_AT_IB_RP_BAR_ADDR1(bar) \ (CDNS_PCIE_AT_BASE + 0x0804 + (bar) * 0x0008) +/* AXI link down register */ +#define CDNS_PCIE_AT_LINKDOWN (CDNS_PCIE_AT_BASE + 0x0824) + enum cdns_pcie_rp_bar { RP_BAR0, RP_BAR1, @@ -314,5 +317,6 @@ void cdns_pcie_set_outbound_region_for_normal_msg(struct cdns_pcie *pcie, u8 fn, void cdns_pcie_disable_phy(struct cdns_pcie *pcie); int cdns_pcie_enable_phy(struct cdns_pcie *pcie); int cdns_pcie_init_phy(struct device *dev, struct cdns_pcie *pcie); +extern const struct dev_pm_ops cdns_pcie_pm_ops; #endif /* _PCIE_CADENCE_H */ -- 1.7.1
next prev parent reply other threads:[~2018-06-25 8:31 UTC|newest] Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-06-25 8:30 [PATCH 0/5] PCI: cadence: Host and EP driver updates for PHY and power management Alan Douglas 2018-06-25 8:30 ` Alan Douglas 2018-06-25 8:30 ` [PATCH 1/5] PCI: cadence: Update cdns_pcie_writel function signature Alan Douglas 2018-06-25 8:30 ` Alan Douglas 2018-06-25 8:30 ` [PATCH 2/5] PCI: cadence: Add generic PHY support to host and EP drivers Alan Douglas 2018-06-25 8:30 ` Alan Douglas 2018-06-25 8:30 ` [PATCH 3/5] dt-bindings: PCI: cadence: Add DT bindings for optional PHYs Alan Douglas 2018-06-25 8:30 ` Alan Douglas 2018-07-03 21:01 ` Rob Herring 2018-06-25 8:30 ` Alan Douglas [this message] 2018-06-25 8:30 ` [PATCH 4/5] PCI: cadence: Add Power Management ops for host and EP Alan Douglas 2018-07-09 15:33 ` Lorenzo Pieralisi 2018-07-09 15:56 ` Alan Douglas 2018-07-09 15:56 ` Alan Douglas 2018-07-11 10:58 ` Lorenzo Pieralisi 2018-07-11 14:00 ` Alan Douglas 2018-07-11 14:00 ` Alan Douglas 2018-06-25 8:30 ` [PATCH 5/5] PCI: cadence: Add shutdown callback to host driver Alan Douglas 2018-06-25 8:30 ` Alan Douglas 2018-07-13 13:02 ` [PATCH 0/5] PCI: cadence: Host and EP driver updates for PHY and power management Lorenzo Pieralisi
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