From: Colin Foster <colin.foster@in-advantage.com> To: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-gpio@vger.kernel.org Cc: Vladimir Oltean <vladimir.oltean@nxp.com>, Lee Jones <lee.jones@linaro.org>, Rob Herring <robh+dt@kernel.org>, Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>, Andrew Lunn <andrew@lunn.ch>, Heiner Kallweit <hkallweit1@gmail.com>, Russell King <linux@armlinux.org.uk>, "David S. Miller" <davem@davemloft.net>, Eric Dumazet <edumazet@google.com>, Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>, Lars Povlsen <lars.povlsen@microchip.com>, Steen Hegelund <Steen.Hegelund@microchip.com>, UNGLinuxDriver@microchip.com, Linus Walleij <linus.walleij@linaro.org>, Wolfram Sang <wsa@kernel.org>, Terry Bowman <terry.bowman@amd.com>, Andy Shevchenko <andy.shevchenko@gmail.com>, katie.morris@in-advantage.com Subject: [PATCH v12 net-next 1/9] mfd: ocelot: add helper to get regmap from a resource Date: Fri, 1 Jul 2022 12:26:01 -0700 [thread overview] Message-ID: <20220701192609.3970317-2-colin.foster@in-advantage.com> (raw) In-Reply-To: <20220701192609.3970317-1-colin.foster@in-advantage.com> Several ocelot-related modules are designed for MMIO / regmaps. As such, they often use a combination of devm_platform_get_and_ioremap_resource and devm_regmap_init_mmio. Operating in an MFD might be different, in that it could be memory mapped, or it could be SPI, I2C... In these cases a fallback to use IORESOURCE_REG instead of IORESOURCE_MEM becomes necessary. When this happens, there's redundant logic that needs to be implemented in every driver. In order to avoid this redundancy, utilize a single function that, if the MFD scenario is enabled, will perform this fallback logic. Signed-off-by: Colin Foster <colin.foster@in-advantage.com> --- MAINTAINERS | 5 ++++ include/linux/mfd/ocelot.h | 51 ++++++++++++++++++++++++++++++++++++++ 2 files changed, 56 insertions(+) create mode 100644 include/linux/mfd/ocelot.h diff --git a/MAINTAINERS b/MAINTAINERS index 7c029ab73265..c2f61ed1b730 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -14413,6 +14413,11 @@ F: net/dsa/tag_ocelot.c F: net/dsa/tag_ocelot_8021q.c F: tools/testing/selftests/drivers/net/ocelot/* +OCELOT EXTERNAL SWITCH CONTROL +M: Colin Foster <colin.foster@in-advantage.com> +S: Supported +F: include/linux/mfd/ocelot.h + OCXL (Open Coherent Accelerator Processor Interface OpenCAPI) DRIVER M: Frederic Barrat <fbarrat@linux.ibm.com> M: Andrew Donnellan <ajd@linux.ibm.com> diff --git a/include/linux/mfd/ocelot.h b/include/linux/mfd/ocelot.h new file mode 100644 index 000000000000..7e64870b75ca --- /dev/null +++ b/include/linux/mfd/ocelot.h @@ -0,0 +1,51 @@ +/* SPDX-License-Identifier: GPL-2.0 OR MIT */ +/* Copyright 2022 Innovative Advantage Inc. */ + +#include <linux/err.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/types.h> + +struct resource; + +static inline struct regmap * +ocelot_regmap_from_resource_optional(struct platform_device *pdev, + unsigned int index, + const struct regmap_config *config) +{ + struct device *dev = &pdev->dev; + struct resource *res; + u32 __iomem *regs; + + res = platform_get_resource(pdev, IORESOURCE_MEM, index); + if (res) { + regs = devm_ioremap_resource(dev, res); + if (IS_ERR(regs)) + return ERR_CAST(regs); + return devm_regmap_init_mmio(dev, regs, config); + } + + /* + * Fall back to using REG and getting the resource from the parent + * device, which is possible in an MFD configuration + */ + if (dev->parent) { + res = platform_get_resource(pdev, IORESOURCE_REG, index); + if (!res) + return NULL; + + return dev_get_regmap(dev->parent, res->name); + } + + return NULL; +} + +static inline struct regmap * +ocelot_regmap_from_resource(struct platform_device *pdev, unsigned int index, + const struct regmap_config *config) +{ + struct regmap *map; + + map = ocelot_regmap_from_resource_optional(pdev, index, config); + return (map) ? map : ERR_PTR(-ENOENT); +} -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: Colin Foster <colin.foster@in-advantage.com> To: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-gpio@vger.kernel.org Cc: Vladimir Oltean <vladimir.oltean@nxp.com>, Lee Jones <lee.jones@linaro.org>, Rob Herring <robh+dt@kernel.org>, Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>, Andrew Lunn <andrew@lunn.ch>, Heiner Kallweit <hkallweit1@gmail.com>, Russell King <linux@armlinux.org.uk>, "David S. Miller" <davem@davemloft.net>, Eric Dumazet <edumazet@google.com>, Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>, Lars Povlsen <lars.povlsen@microchip.com>, Steen Hegelund <Steen.Hegelund@microchip.com>, UNGLinuxDriver@microchip.com, Linus Walleij <linus.walleij@linaro.org>, Wolfram Sang <wsa@kernel.org>, Terry Bowman <terry.bowman@amd.com>, Andy Shevchenko <andy.shevchenko@gmail.com>, katie.morris@in-advantage.com Subject: [PATCH v12 net-next 1/9] mfd: ocelot: add helper to get regmap from a resource Date: Fri, 1 Jul 2022 12:26:01 -0700 [thread overview] Message-ID: <20220701192609.3970317-2-colin.foster@in-advantage.com> (raw) In-Reply-To: <20220701192609.3970317-1-colin.foster@in-advantage.com> Several ocelot-related modules are designed for MMIO / regmaps. As such, they often use a combination of devm_platform_get_and_ioremap_resource and devm_regmap_init_mmio. Operating in an MFD might be different, in that it could be memory mapped, or it could be SPI, I2C... In these cases a fallback to use IORESOURCE_REG instead of IORESOURCE_MEM becomes necessary. When this happens, there's redundant logic that needs to be implemented in every driver. In order to avoid this redundancy, utilize a single function that, if the MFD scenario is enabled, will perform this fallback logic. Signed-off-by: Colin Foster <colin.foster@in-advantage.com> --- MAINTAINERS | 5 ++++ include/linux/mfd/ocelot.h | 51 ++++++++++++++++++++++++++++++++++++++ 2 files changed, 56 insertions(+) create mode 100644 include/linux/mfd/ocelot.h diff --git a/MAINTAINERS b/MAINTAINERS index 7c029ab73265..c2f61ed1b730 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -14413,6 +14413,11 @@ F: net/dsa/tag_ocelot.c F: net/dsa/tag_ocelot_8021q.c F: tools/testing/selftests/drivers/net/ocelot/* +OCELOT EXTERNAL SWITCH CONTROL +M: Colin Foster <colin.foster@in-advantage.com> +S: Supported +F: include/linux/mfd/ocelot.h + OCXL (Open Coherent Accelerator Processor Interface OpenCAPI) DRIVER M: Frederic Barrat <fbarrat@linux.ibm.com> M: Andrew Donnellan <ajd@linux.ibm.com> diff --git a/include/linux/mfd/ocelot.h b/include/linux/mfd/ocelot.h new file mode 100644 index 000000000000..7e64870b75ca --- /dev/null +++ b/include/linux/mfd/ocelot.h @@ -0,0 +1,51 @@ +/* SPDX-License-Identifier: GPL-2.0 OR MIT */ +/* Copyright 2022 Innovative Advantage Inc. */ + +#include <linux/err.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/types.h> + +struct resource; + +static inline struct regmap * +ocelot_regmap_from_resource_optional(struct platform_device *pdev, + unsigned int index, + const struct regmap_config *config) +{ + struct device *dev = &pdev->dev; + struct resource *res; + u32 __iomem *regs; + + res = platform_get_resource(pdev, IORESOURCE_MEM, index); + if (res) { + regs = devm_ioremap_resource(dev, res); + if (IS_ERR(regs)) + return ERR_CAST(regs); + return devm_regmap_init_mmio(dev, regs, config); + } + + /* + * Fall back to using REG and getting the resource from the parent + * device, which is possible in an MFD configuration + */ + if (dev->parent) { + res = platform_get_resource(pdev, IORESOURCE_REG, index); + if (!res) + return NULL; + + return dev_get_regmap(dev->parent, res->name); + } + + return NULL; +} + +static inline struct regmap * +ocelot_regmap_from_resource(struct platform_device *pdev, unsigned int index, + const struct regmap_config *config) +{ + struct regmap *map; + + map = ocelot_regmap_from_resource_optional(pdev, index, config); + return (map) ? map : ERR_PTR(-ENOENT); +} -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2022-07-01 19:26 UTC|newest] Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-07-01 19:26 [PATCH v12 net-next 0/9] add support for VSC7512 control over SPI Colin Foster 2022-07-01 19:26 ` Colin Foster 2022-07-01 19:26 ` Colin Foster [this message] 2022-07-01 19:26 ` [PATCH v12 net-next 1/9] mfd: ocelot: add helper to get regmap from a resource Colin Foster 2022-07-01 20:23 ` Andy Shevchenko 2022-07-01 20:23 ` Andy Shevchenko 2022-07-01 20:34 ` Colin Foster 2022-07-01 20:34 ` Colin Foster 2022-07-01 20:41 ` Andy Shevchenko 2022-07-01 20:41 ` Andy Shevchenko 2022-07-01 19:26 ` [PATCH v12 net-next 2/9] net: mdio: mscc-miim: add ability to be used in a non-mmio configuration Colin Foster 2022-07-01 19:26 ` Colin Foster 2022-07-01 20:24 ` Andy Shevchenko 2022-07-01 20:24 ` Andy Shevchenko 2022-07-01 20:38 ` Colin Foster 2022-07-01 20:38 ` Colin Foster 2022-07-01 19:26 ` [PATCH v12 net-next 3/9] pinctrl: ocelot: allow pinctrl-ocelot to be loaded as a module Colin Foster 2022-07-01 19:26 ` Colin Foster 2022-07-01 19:26 ` [PATCH v12 net-next 4/9] pinctrl: ocelot: add ability to be used in a non-mmio configuration Colin Foster 2022-07-01 19:26 ` Colin Foster 2022-07-01 19:26 ` [PATCH v12 net-next 5/9] pinctrl: microchip-sgpio: allow sgpio driver to be used as a module Colin Foster 2022-07-01 19:26 ` Colin Foster 2022-07-01 19:26 ` [PATCH v12 net-next 6/9] pinctrl: microchip-sgpio: add ability to be used in a non-mmio configuration Colin Foster 2022-07-01 19:26 ` Colin Foster 2022-07-01 19:26 ` [PATCH v12 net-next 7/9] resource: add define macro for register address resources Colin Foster 2022-07-01 19:26 ` Colin Foster 2022-07-01 19:26 ` [PATCH v12 net-next 8/9] dt-bindings: mfd: ocelot: add bindings for VSC7512 Colin Foster 2022-07-01 19:26 ` Colin Foster 2022-07-05 20:26 ` Rob Herring 2022-07-05 20:26 ` Rob Herring 2022-07-01 19:26 ` [PATCH v12 net-next 9/9] mfd: ocelot: add support for the vsc7512 chip via spi Colin Foster 2022-07-01 19:26 ` Colin Foster 2022-07-01 20:38 ` Andy Shevchenko 2022-07-01 20:38 ` Andy Shevchenko 2022-07-01 21:04 ` Colin Foster 2022-07-01 21:04 ` Colin Foster 2022-07-02 3:02 ` Jakub Kicinski 2022-07-02 3:02 ` Jakub Kicinski 2022-07-02 16:26 ` Colin Foster 2022-07-02 16:26 ` Colin Foster 2022-07-02 10:04 ` kernel test robot 2022-07-02 10:04 ` kernel test robot 2022-07-05 20:24 ` [PATCH v12 net-next 0/9] add support for VSC7512 control over SPI Rob Herring 2022-07-05 20:24 ` Rob Herring 2022-07-05 20:30 ` Colin Foster 2022-07-05 20:30 ` Colin Foster 2022-07-05 22:04 ` Vladimir Oltean 2022-07-05 22:04 ` Vladimir Oltean 2022-07-05 22:56 ` Vladimir Oltean 2022-07-05 22:56 ` Vladimir Oltean 2022-07-06 4:34 ` Colin Foster 2022-07-06 4:34 ` Colin Foster
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