From: Kishon Vijay Abraham I <kishon@ti.com> To: Tero Kristo <t-kristo@ti.com>, Nishanth Menon <nm@ti.com>, Rob Herring <robh+dt@kernel.org>, Tom Joseph <tjoseph@cadence.com>, Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>, Bjorn Helgaas <bhelgaas@google.com> Cc: <linux-omap@vger.kernel.org>, Kishon Vijay Abraham I <kishon@ti.com>, <linux-arm-kernel@lists.infradead.org>, <devicetree@vger.kernel.org>, <linux-pci@vger.kernel.org>, <linux-kernel@vger.kernel.org> Subject: [PATCH 2/3] PCI: j721e: Get offset within "syscon" from "ti,syscon-pcie-ctrl" phandle arg Date: Mon, 16 Nov 2020 23:01:40 +0530 [thread overview] Message-ID: <20201116173141.31873-3-kishon@ti.com> (raw) In-Reply-To: <20201116173141.31873-1-kishon@ti.com> Get "syscon" pcie_ctrl offset from the argument of "ti,syscon-pcie-ctrl" phandle. Previously a subnode to "syscon" node was added which has the exact memory mapped address of pcie_ctrl but now the offset of pcie_ctrl within "syscon" is now being passed as argument to "ti,syscon-pcie-ctrl" phandle. Link: http://lore.kernel.org/r/CAL_JsqKiUcO76bo1GoepWM1TusJWoty_BRy2hFSgtEVMqtrvvQ@mail.gmail.com Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> --- drivers/pci/controller/cadence/pci-j721e.c | 28 +++++++++++++++------- 1 file changed, 19 insertions(+), 9 deletions(-) diff --git a/drivers/pci/controller/cadence/pci-j721e.c b/drivers/pci/controller/cadence/pci-j721e.c index 586b9d69fa5e..d615e6313252 100644 --- a/drivers/pci/controller/cadence/pci-j721e.c +++ b/drivers/pci/controller/cadence/pci-j721e.c @@ -12,6 +12,7 @@ #include <linux/irqchip/chained_irq.h> #include <linux/irqdomain.h> #include <linux/mfd/syscon.h> +#include <linux/of.h> #include <linux/of_device.h> #include <linux/of_irq.h> #include <linux/pci.h> @@ -153,7 +154,8 @@ static const struct cdns_pcie_ops j721e_pcie_ops = { .link_up = j721e_pcie_link_up, }; -static int j721e_pcie_set_mode(struct j721e_pcie *pcie, struct regmap *syscon) +static int j721e_pcie_set_mode(struct j721e_pcie *pcie, struct regmap *syscon, + unsigned int offset) { struct device *dev = pcie->dev; u32 mask = J721E_MODE_RC; @@ -164,7 +166,7 @@ static int j721e_pcie_set_mode(struct j721e_pcie *pcie, struct regmap *syscon) if (mode == PCI_MODE_RC) val = J721E_MODE_RC; - ret = regmap_update_bits(syscon, 0, mask, val); + ret = regmap_update_bits(syscon, offset, mask, val); if (ret) dev_err(dev, "failed to set pcie mode\n"); @@ -172,7 +174,7 @@ static int j721e_pcie_set_mode(struct j721e_pcie *pcie, struct regmap *syscon) } static int j721e_pcie_set_link_speed(struct j721e_pcie *pcie, - struct regmap *syscon) + struct regmap *syscon, unsigned int offset) { struct device *dev = pcie->dev; struct device_node *np = dev->of_node; @@ -185,7 +187,7 @@ static int j721e_pcie_set_link_speed(struct j721e_pcie *pcie, link_speed = 2; val = link_speed - 1; - ret = regmap_update_bits(syscon, 0, GENERATION_SEL_MASK, val); + ret = regmap_update_bits(syscon, offset, GENERATION_SEL_MASK, val); if (ret) dev_err(dev, "failed to set link speed\n"); @@ -193,7 +195,7 @@ static int j721e_pcie_set_link_speed(struct j721e_pcie *pcie, } static int j721e_pcie_set_lane_count(struct j721e_pcie *pcie, - struct regmap *syscon) + struct regmap *syscon, unsigned int offset) { struct device *dev = pcie->dev; u32 lanes = pcie->num_lanes; @@ -201,7 +203,7 @@ static int j721e_pcie_set_lane_count(struct j721e_pcie *pcie, int ret; val = LANE_COUNT(lanes - 1); - ret = regmap_update_bits(syscon, 0, LANE_COUNT_MASK, val); + ret = regmap_update_bits(syscon, offset, LANE_COUNT_MASK, val); if (ret) dev_err(dev, "failed to set link count\n"); @@ -212,6 +214,7 @@ static int j721e_pcie_ctrl_init(struct j721e_pcie *pcie) { struct device *dev = pcie->dev; struct device_node *node = dev->of_node; + struct of_phandle_args args; struct regmap *syscon; int ret; @@ -221,19 +224,26 @@ static int j721e_pcie_ctrl_init(struct j721e_pcie *pcie) return PTR_ERR(syscon); } - ret = j721e_pcie_set_mode(pcie, syscon); + ret = of_parse_phandle_with_fixed_args(node, "ti,syscon-pcie-ctrl", 1, + 0, &args); + if (ret) { + dev_err(dev, "failed to parse ti,syscon-pcie-ctrl\n"); + return ret; + } + + ret = j721e_pcie_set_mode(pcie, syscon, args.args[0]); if (ret < 0) { dev_err(dev, "Failed to set pci mode\n"); return ret; } - ret = j721e_pcie_set_link_speed(pcie, syscon); + ret = j721e_pcie_set_link_speed(pcie, syscon, args.args[0]); if (ret < 0) { dev_err(dev, "Failed to set link speed\n"); return ret; } - ret = j721e_pcie_set_lane_count(pcie, syscon); + ret = j721e_pcie_set_lane_count(pcie, syscon, args.args[0]); if (ret < 0) { dev_err(dev, "Failed to set num-lanes\n"); return ret; -- 2.17.1
next prev parent reply other threads:[~2020-11-16 17:32 UTC|newest] Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-11-16 17:31 [PATCH 0/3] PCI: J721E: Fix Broken DT w.r.t SYSCON DT Kishon Vijay Abraham I 2020-11-16 17:31 ` [PATCH 1/3] dt-bindings: pci: ti,j721e: Fix "ti,syscon-pcie-ctrl" to take argument Kishon Vijay Abraham I 2020-11-18 21:11 ` Rob Herring 2020-11-20 5:09 ` Kishon Vijay Abraham I 2020-11-26 12:53 ` Kishon Vijay Abraham I 2020-11-30 16:12 ` Rob Herring 2020-11-19 13:41 ` [PATCH 1/3] dt-bindings: pci: ti, j721e: Fix "ti, syscon-pcie-ctrl" " Rob Herring 2020-11-16 17:31 ` Kishon Vijay Abraham I [this message] 2020-11-16 17:31 ` [PATCH 3/3] arm64: dts: ti: k3-j721e-main: Remove "syscon" nodes added for pcieX_ctrl Kishon Vijay Abraham I 2020-11-18 21:14 ` Rob Herring
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