From: Matt Ranostay <mranostay@ti.com> To: <kishon@ti.com>, <vigneshr@ti.com>, <bhelgaas@google.com>, <robh@kernel.org>, <lpieralisi@kernel.org> Cc: <linux-arm-kernel@lists.infradead.org>, <linux-pci@vger.kernel.org>, <nm@ti.com>, Matt Ranostay <mranostay@ti.com> Subject: [PATCH v2 2/3] PCI: j721e: Add per platform maximum lane settings Date: Mon, 26 Sep 2022 10:55:37 -0700 [thread overview] Message-ID: <20220926175538.362018-3-mranostay@ti.com> (raw) In-Reply-To: <20220926175538.362018-1-mranostay@ti.com> Various platforms have different maximum amount of lanes that can be selected. Add max_lanes to struct j721e_pcie to allow for error checking on num-lanes selection from device tree. Cc: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Matt Ranostay <mranostay@ti.com> Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com> --- drivers/pci/controller/cadence/pci-j721e.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/pci/controller/cadence/pci-j721e.c b/drivers/pci/controller/cadence/pci-j721e.c index d9b1527421c3..0a537f2d5078 100644 --- a/drivers/pci/controller/cadence/pci-j721e.c +++ b/drivers/pci/controller/cadence/pci-j721e.c @@ -47,8 +47,6 @@ enum link_status { #define GENERATION_SEL_MASK GENMASK(1, 0) -#define MAX_LANES 2 - struct j721e_pcie { struct cdns_pcie *cdns_pcie; struct clk *refclk; @@ -71,6 +69,7 @@ struct j721e_pcie_data { unsigned int quirk_disable_flr:1; u32 linkdown_irq_regfield; unsigned int byte_access_allowed:1; + unsigned int max_lanes; }; static inline u32 j721e_pcie_user_readl(struct j721e_pcie *pcie, u32 offset) @@ -294,11 +293,13 @@ static const struct j721e_pcie_data j721e_pcie_rc_data = { .quirk_retrain_flag = true, .byte_access_allowed = false, .linkdown_irq_regfield = LINK_DOWN, + .max_lanes = 2, }; static const struct j721e_pcie_data j721e_pcie_ep_data = { .mode = PCI_MODE_EP, .linkdown_irq_regfield = LINK_DOWN, + .max_lanes = 2, }; static const struct j721e_pcie_data j7200_pcie_rc_data = { @@ -306,23 +307,27 @@ static const struct j721e_pcie_data j7200_pcie_rc_data = { .quirk_detect_quiet_flag = true, .linkdown_irq_regfield = J7200_LINK_DOWN, .byte_access_allowed = true, + .max_lanes = 4, }; static const struct j721e_pcie_data j7200_pcie_ep_data = { .mode = PCI_MODE_EP, .quirk_detect_quiet_flag = true, .quirk_disable_flr = true, + .max_lanes = 4, }; static const struct j721e_pcie_data am64_pcie_rc_data = { .mode = PCI_MODE_RC, .linkdown_irq_regfield = J7200_LINK_DOWN, .byte_access_allowed = true, + .max_lanes = 1, }; static const struct j721e_pcie_data am64_pcie_ep_data = { .mode = PCI_MODE_EP, .linkdown_irq_regfield = J7200_LINK_DOWN, + .max_lanes = 1, }; static const struct of_device_id of_j721e_pcie_match[] = { @@ -436,7 +441,7 @@ static int j721e_pcie_probe(struct platform_device *pdev) pcie->user_cfg_base = base; ret = of_property_read_u32(node, "num-lanes", &num_lanes); - if (ret || num_lanes > MAX_LANES) + if (ret || num_lanes > data->max_lanes) num_lanes = 1; pcie->num_lanes = num_lanes; -- 2.38.0.rc0.52.gdda7228a83 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
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From: Matt Ranostay <mranostay@ti.com> To: <kishon@ti.com>, <vigneshr@ti.com>, <bhelgaas@google.com>, <robh@kernel.org>, <lpieralisi@kernel.org> Cc: <linux-arm-kernel@lists.infradead.org>, <linux-pci@vger.kernel.org>, <nm@ti.com>, Matt Ranostay <mranostay@ti.com> Subject: [PATCH v2 2/3] PCI: j721e: Add per platform maximum lane settings Date: Mon, 26 Sep 2022 10:55:37 -0700 [thread overview] Message-ID: <20220926175538.362018-3-mranostay@ti.com> (raw) In-Reply-To: <20220926175538.362018-1-mranostay@ti.com> Various platforms have different maximum amount of lanes that can be selected. Add max_lanes to struct j721e_pcie to allow for error checking on num-lanes selection from device tree. Cc: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Matt Ranostay <mranostay@ti.com> Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com> --- drivers/pci/controller/cadence/pci-j721e.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/pci/controller/cadence/pci-j721e.c b/drivers/pci/controller/cadence/pci-j721e.c index d9b1527421c3..0a537f2d5078 100644 --- a/drivers/pci/controller/cadence/pci-j721e.c +++ b/drivers/pci/controller/cadence/pci-j721e.c @@ -47,8 +47,6 @@ enum link_status { #define GENERATION_SEL_MASK GENMASK(1, 0) -#define MAX_LANES 2 - struct j721e_pcie { struct cdns_pcie *cdns_pcie; struct clk *refclk; @@ -71,6 +69,7 @@ struct j721e_pcie_data { unsigned int quirk_disable_flr:1; u32 linkdown_irq_regfield; unsigned int byte_access_allowed:1; + unsigned int max_lanes; }; static inline u32 j721e_pcie_user_readl(struct j721e_pcie *pcie, u32 offset) @@ -294,11 +293,13 @@ static const struct j721e_pcie_data j721e_pcie_rc_data = { .quirk_retrain_flag = true, .byte_access_allowed = false, .linkdown_irq_regfield = LINK_DOWN, + .max_lanes = 2, }; static const struct j721e_pcie_data j721e_pcie_ep_data = { .mode = PCI_MODE_EP, .linkdown_irq_regfield = LINK_DOWN, + .max_lanes = 2, }; static const struct j721e_pcie_data j7200_pcie_rc_data = { @@ -306,23 +307,27 @@ static const struct j721e_pcie_data j7200_pcie_rc_data = { .quirk_detect_quiet_flag = true, .linkdown_irq_regfield = J7200_LINK_DOWN, .byte_access_allowed = true, + .max_lanes = 4, }; static const struct j721e_pcie_data j7200_pcie_ep_data = { .mode = PCI_MODE_EP, .quirk_detect_quiet_flag = true, .quirk_disable_flr = true, + .max_lanes = 4, }; static const struct j721e_pcie_data am64_pcie_rc_data = { .mode = PCI_MODE_RC, .linkdown_irq_regfield = J7200_LINK_DOWN, .byte_access_allowed = true, + .max_lanes = 1, }; static const struct j721e_pcie_data am64_pcie_ep_data = { .mode = PCI_MODE_EP, .linkdown_irq_regfield = J7200_LINK_DOWN, + .max_lanes = 1, }; static const struct of_device_id of_j721e_pcie_match[] = { @@ -436,7 +441,7 @@ static int j721e_pcie_probe(struct platform_device *pdev) pcie->user_cfg_base = base; ret = of_property_read_u32(node, "num-lanes", &num_lanes); - if (ret || num_lanes > MAX_LANES) + if (ret || num_lanes > data->max_lanes) num_lanes = 1; pcie->num_lanes = num_lanes; -- 2.38.0.rc0.52.gdda7228a83
next prev parent reply other threads:[~2022-09-26 17:57 UTC|newest] Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-09-26 17:55 [PATCH v2 0/3] PCI: add 4x lane support for pci-j721e controllers Matt Ranostay 2022-09-26 17:55 ` Matt Ranostay 2022-09-26 17:55 ` [PATCH v2 1/3] PCI: j721e: Add PCIe 4x lane selection support Matt Ranostay 2022-09-26 17:55 ` Matt Ranostay 2022-09-26 17:55 ` Matt Ranostay [this message] 2022-09-26 17:55 ` [PATCH v2 2/3] PCI: j721e: Add per platform maximum lane settings Matt Ranostay 2022-09-26 17:55 ` [PATCH v2 3/3] PCI: j721e: Add warnings on num-lanes misconfiguration Matt Ranostay 2022-09-26 17:55 ` Matt Ranostay
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