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Message-Id: <20230216075321.2898003-2-colin.foster@in-advantage.com> Date: Wed, 15 Feb 2023 23:53:15 -0800 From: Colin Foster <colin.foster@...advantage.com> To: linux-phy@...ts.infradead.org, netdev@...r.kernel.org, linux-kernel@...r.kernel.org Cc: Russell King <linux@...linux.org.uk>, Kishon Vijay Abraham I <kishon@...nel.org>, Vinod Koul <vkoul@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Jakub Kicinski <kuba@...nel.org>, Eric Dumazet <edumazet@...gle.com>, "David S. Miller" <davem@...emloft.net>, Florian Fainelli <f.fainelli@...il.com>, Andrew Lunn <andrew@...n.ch>, UNGLinuxDriver@...rochip.com, Alexandre Belloni <alexandre.belloni@...tlin.com>, Claudiu Manoil <claudiu.manoil@....com>, Vladimir Oltean <vladimir.oltean@....com>, Lee Jones <lee@...nel.org> Subject: [RFC v1 net-next 1/7] phy: phy-ocelot-serdes: add ability to be used in a non-syscon configuration The phy-ocelot-serdes module has exclusively been used in a syscon setup, from an internal CPU. The addition of external control of ocelot switches via an existing MFD implementation means that syscon is no longer the only interface that phy-ocelot-serdes will see. In the MFD configuration, an IORESOURCE_REG resource will exist for the device. Utilize this resource to be able to function in both syscon and non-syscon configurations. Signed-off-by: Colin Foster <colin.foster@...advantage.com> --- drivers/phy/mscc/phy-ocelot-serdes.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/phy/mscc/phy-ocelot-serdes.c b/drivers/phy/mscc/phy-ocelot-serdes.c index 76f596365176..d9443e865a78 100644 --- a/drivers/phy/mscc/phy-ocelot-serdes.c +++ b/drivers/phy/mscc/phy-ocelot-serdes.c @@ -494,6 +494,7 @@ static int serdes_probe(struct platform_device *pdev) { struct phy_provider *provider; struct serdes_ctrl *ctrl; + struct resource *res; unsigned int i; int ret; @@ -503,6 +504,14 @@ static int serdes_probe(struct platform_device *pdev) ctrl->dev = &pdev->dev; ctrl->regs = syscon_node_to_regmap(pdev->dev.parent->of_node); + if (IS_ERR(ctrl->regs)) { + /* Fall back to using IORESOURCE_REG, if possible */ + res = platform_get_resource(pdev, IORESOURCE_REG, 0); + if (res) + ctrl->regs = dev_get_regmap(ctrl->dev->parent, + res->name); + } + if (IS_ERR(ctrl->regs)) return PTR_ERR(ctrl->regs); -- 2.25.1
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