On Tue, Jul 23, 2019 at 11:18:33PM +0100, Suzuki K Poulose wrote:
> Introduce wrappers for {bus/driver/class}_find_device() to
> locate devices by its of_node.
>
> Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
> Cc: Maxime Ripard <maxime.ripard@xxxxxxxxxxx>
> Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
> Cc: David Airlie <airlied@xxxxxxxx>
> Cc: Daniel Vetter <daniel@xxxxxxxx>
> Cc: devicetree@xxxxxxxxxxxxxxx
> Cc: Florian Fainelli <f.fainelli@xxxxxxxxx>
> Cc: Frank Rowand <frowand.list@xxxxxxxxx>
> Cc: Heiko Stuebner <heiko@xxxxxxxxx>
> Cc: Liam Girdwood <lgirdwood@xxxxxxxxx>
> Cc: linux-i2c@xxxxxxxxxxxxxxx
> Cc: linux-rockchip@xxxxxxxxxxxxxxxxxxx
> Cc: linux-spi@xxxxxxxxxxxxxxx
> Cc: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>
> Cc: Rob Herring <robh+dt@xxxxxxxxxx>
> Cc: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
> Cc: Takashi Iwai <tiwai@xxxxxxxx>
> Cc: Wolfram Sang <wsa@xxxxxxxxxxxxx>
> Cc: Alan Tull <atull@xxxxxxxxxx>
> Cc: Moritz Fischer <mdf@xxxxxxxxxx>
> Cc: linux-fpga@xxxxxxxxxxxxxxx
> Cc: Peter Rosin <peda@xxxxxxxxxx>
> Cc: Mark Brown <broonie@xxxxxxxxxx>
> Cc: Florian Fainelli <f.fainelli@xxxxxxxxx>
> Cc: Heiner Kallweit <hkallweit1@xxxxxxxxx>
> Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
> Cc: Andrew Lunn <andrew@xxxxxxx>
> Cc: Liam Girdwood <lgirdwood@xxxxxxxxx>
> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> Cc: "Rafael J. Wysocki" <rafael@xxxxxxxxxx>
> Cc: Lee Jones <lee.jones@xxxxxxxxxx>
> Cc: Thor Thayer <thor.thayer@xxxxxxxxxxxxxxx>
> Cc: Jiri Slaby <jslaby@xxxxxxxx>
> Cc: Mark Brown <broonie@xxxxxxxxxx>
> Cc: Andrew Lunn <andrew@xxxxxxx>
> Cc: Peter Rosin <peda@xxxxxxxxxx>
> Signed-off-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
Acked-by: Moritz Fischer <mdf@xxxxxxxxxx> # For FPGA part
> ---
> - Dropped the reviewed-by tags from Thor, Mark, Andrew and Peter as the
> patches are mereged, though there are no functional changes.
> ---
> drivers/amba/tegra-ahb.c | 11 +-------
> drivers/fpga/fpga-bridge.c | 8 +-----
> drivers/fpga/fpga-mgr.c | 8 +-----
> drivers/gpu/drm/drm_mipi_dsi.c | 7 +----
> drivers/i2c/i2c-core-of.c | 7 +----
> drivers/mfd/altera-sysmgr.c | 14 ++--------
> drivers/mux/core.c | 7 +----
> drivers/net/phy/mdio_bus.c | 9 +------
> drivers/nvmem/core.c | 7 +----
> drivers/of/of_mdio.c | 8 +-----
> drivers/of/platform.c | 7 +----
> drivers/regulator/of_regulator.c | 7 +----
> drivers/spi/spi.c | 20 +++------------
> include/linux/device.h | 37 +++++++++++++++++++++++++++
> sound/soc/rockchip/rk3399_gru_sound.c | 9 ++-----
> 15 files changed, 56 insertions(+), 110 deletions(-)
>
> diff --git a/drivers/amba/tegra-ahb.c b/drivers/amba/tegra-ahb.c
> index aa64eece77a6..57d3b2e2d007 100644
> --- a/drivers/amba/tegra-ahb.c
> +++ b/drivers/amba/tegra-ahb.c
> @@ -134,22 +134,13 @@ static inline void gizmo_writel(struct tegra_ahb *ahb, u32 value, u32 offset)
> }
>
> #ifdef CONFIG_TEGRA_IOMMU_SMMU
> -static int tegra_ahb_match_by_smmu(struct device *dev, const void *data)
> -{
> - struct tegra_ahb *ahb = dev_get_drvdata(dev);
> - const struct device_node *dn = data;
> -
> - return (ahb->dev->of_node == dn) ? 1 : 0;
> -}
> -
> int tegra_ahb_enable_smmu(struct device_node *dn)
> {
> struct device *dev;
> u32 val;
> struct tegra_ahb *ahb;
>
> - dev = driver_find_device(&tegra_ahb_driver.driver, NULL, dn,
> - tegra_ahb_match_by_smmu);
> + dev = driver_find_device_by_of_node(&tegra_ahb_driver.driver, dn);
> if (!dev)
> return -EPROBE_DEFER;
> ahb = dev_get_drvdata(dev);
> diff --git a/drivers/fpga/fpga-bridge.c b/drivers/fpga/fpga-bridge.c
> index 80bd8f1b2aa6..4bab9028940a 100644
> --- a/drivers/fpga/fpga-bridge.c
> +++ b/drivers/fpga/fpga-bridge.c
> @@ -19,11 +19,6 @@ static struct class *fpga_bridge_class;
> /* Lock for adding/removing bridges to linked lists*/
> static spinlock_t bridge_list_lock;
>
> -static int fpga_bridge_of_node_match(struct device *dev, const void *data)
> -{
> - return dev->of_node == data;
> -}
> -
> /**
> * fpga_bridge_enable - Enable transactions on the bridge
> *
> @@ -104,8 +99,7 @@ struct fpga_bridge *of_fpga_bridge_get(struct device_node *np,
> {
> struct device *dev;
>
> - dev = class_find_device(fpga_bridge_class, NULL, np,
> - fpga_bridge_of_node_match);
> + dev = class_find_device_by_of_node(fpga_bridge_class, np);
> if (!dev)
> return ERR_PTR(-ENODEV);
>
> diff --git a/drivers/fpga/fpga-mgr.c b/drivers/fpga/fpga-mgr.c
> index c3866816456a..e05104f5e40c 100644
> --- a/drivers/fpga/fpga-mgr.c
> +++ b/drivers/fpga/fpga-mgr.c
> @@ -482,11 +482,6 @@ struct fpga_manager *fpga_mgr_get(struct device *dev)
> }
> EXPORT_SYMBOL_GPL(fpga_mgr_get);
>
> -static int fpga_mgr_of_node_match(struct device *dev, const void *data)
> -{
> - return dev->of_node == data;
> -}
> -
> /**
> * of_fpga_mgr_get - Given a device node, get a reference to a fpga mgr.
> *
> @@ -498,8 +493,7 @@ struct fpga_manager *of_fpga_mgr_get(struct device_node *node)
> {
> struct device *dev;
>
> - dev = class_find_device(fpga_mgr_class, NULL, node,
> - fpga_mgr_of_node_match);
> + dev = class_find_device_by_of_node(fpga_mgr_class, node);
> if (!dev)
> return ERR_PTR(-ENODEV);
>
> diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c
> index ad19df0686c9..bd2498bbd74a 100644
> --- a/drivers/gpu/drm/drm_mipi_dsi.c
> +++ b/drivers/gpu/drm/drm_mipi_dsi.c
> @@ -93,11 +93,6 @@ static struct bus_type mipi_dsi_bus_type = {
> .pm = &mipi_dsi_device_pm_ops,
> };
>
> -static int of_device_match(struct device *dev, const void *data)
> -{
> - return dev->of_node == data;
> -}
> -
> /**
> * of_find_mipi_dsi_device_by_node() - find the MIPI DSI device matching a
> * device tree node
> @@ -110,7 +105,7 @@ struct mipi_dsi_device *of_find_mipi_dsi_device_by_node(struct device_node *np)
> {
> struct device *dev;
>
> - dev = bus_find_device(&mipi_dsi_bus_type, NULL, np, of_device_match);
> + dev = bus_find_device_by_of_node(&mipi_dsi_bus_type, np);
>
> return dev ? to_mipi_dsi_device(dev) : NULL;
> }
> diff --git a/drivers/i2c/i2c-core-of.c b/drivers/i2c/i2c-core-of.c
> index d1c48dec7118..6f632d543fcc 100644
> --- a/drivers/i2c/i2c-core-of.c
> +++ b/drivers/i2c/i2c-core-of.c
> @@ -113,11 +113,6 @@ void of_i2c_register_devices(struct i2c_adapter *adap)
> of_node_put(bus);
> }
>
> -static int of_dev_node_match(struct device *dev, const void *data)
> -{
> - return dev->of_node == data;
> -}
> -
> static int of_dev_or_parent_node_match(struct device *dev, const void *data)
> {
> if (dev->of_node == data)
> @@ -135,7 +130,7 @@ struct i2c_client *of_find_i2c_device_by_node(struct device_node *node)
> struct device *dev;
> struct i2c_client *client;
>
> - dev = bus_find_device(&i2c_bus_type, NULL, node, of_dev_node_match);
> + dev = bus_find_device_by_of_node(&i2c_bus_type, node);
> if (!dev)
> return NULL;
>
> diff --git a/drivers/mfd/altera-sysmgr.c b/drivers/mfd/altera-sysmgr.c
> index 2ee14d8a6d31..d2a13a547a3c 100644
> --- a/drivers/mfd/altera-sysmgr.c
> +++ b/drivers/mfd/altera-sysmgr.c
> @@ -87,16 +87,6 @@ static struct regmap_config altr_sysmgr_regmap_cfg = {
> .use_single_write = true,
> };
>
> -/**
> - * sysmgr_match_phandle
> - * Matching function used by driver_find_device().
> - * Return: True if match is found, otherwise false.
> - */
> -static int sysmgr_match_phandle(struct device *dev, const void *data)
> -{
> - return dev->of_node == (const struct device_node *)data;
> -}
> -
> /**
> * altr_sysmgr_regmap_lookup_by_phandle
> * Find the sysmgr previous configured in probe() and return regmap property.
> @@ -117,8 +107,8 @@ struct regmap *altr_sysmgr_regmap_lookup_by_phandle(struct device_node *np,
> if (!sysmgr_np)
> return ERR_PTR(-ENODEV);
>
> - dev = driver_find_device(&altr_sysmgr_driver.driver, NULL,
> - (void *)sysmgr_np, sysmgr_match_phandle);
> + dev = driver_find_device_by_of_node(&altr_sysmgr_driver.driver,
> + (void *)sysmgr_np);
> of_node_put(sysmgr_np);
> if (!dev)
> return ERR_PTR(-EPROBE_DEFER);
> diff --git a/drivers/mux/core.c b/drivers/mux/core.c
> index d1271c1ee23c..1fb22388e7e0 100644
> --- a/drivers/mux/core.c
> +++ b/drivers/mux/core.c
> @@ -405,17 +405,12 @@ int mux_control_deselect(struct mux_control *mux)
> }
> EXPORT_SYMBOL_GPL(mux_control_deselect);
>
> -static int of_dev_node_match(struct device *dev, const void *data)
> -{
> - return dev->of_node == data;
> -}
> -
> /* Note this function returns a reference to the mux_chip dev. */
> static struct mux_chip *of_find_mux_chip_by_node(struct device_node *np)
> {
> struct device *dev;
>
> - dev = class_find_device(&mux_class, NULL, np, of_dev_node_match);
> + dev = class_find_device_by_of_node(&mux_class, np);
>
> return dev ? to_mux_chip(dev) : NULL;
> }
> diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
> index bd04fe762056..ce940871331e 100644
> --- a/drivers/net/phy/mdio_bus.c
> +++ b/drivers/net/phy/mdio_bus.c
> @@ -262,11 +262,6 @@ static struct class mdio_bus_class = {
> };
>
> #if IS_ENABLED(CONFIG_OF_MDIO)
> -/* Helper function for of_mdio_find_bus */
> -static int of_mdio_bus_match(struct device *dev, const void *mdio_bus_np)
> -{
> - return dev->of_node == mdio_bus_np;
> -}
> /**
> * of_mdio_find_bus - Given an mii_bus node, find the mii_bus.
> * @mdio_bus_np: Pointer to the mii_bus.
> @@ -287,9 +282,7 @@ struct mii_bus *of_mdio_find_bus(struct device_node *mdio_bus_np)
> if (!mdio_bus_np)
> return NULL;
>
> - d = class_find_device(&mdio_bus_class, NULL, mdio_bus_np,
> - of_mdio_bus_match);
> -
> + d = class_find_device_by_of_node(&mdio_bus_class, mdio_bus_np);
> return d ? to_mii_bus(d) : NULL;
> }
> EXPORT_SYMBOL(of_mdio_find_bus);
> diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
> index ac5d945be88a..057d1ff87d5d 100644
> --- a/drivers/nvmem/core.c
> +++ b/drivers/nvmem/core.c
> @@ -76,11 +76,6 @@ static struct bus_type nvmem_bus_type = {
> .name = "nvmem",
> };
>
> -static int of_nvmem_match(struct device *dev, const void *nvmem_np)
> -{
> - return dev->of_node == nvmem_np;
> -}
> -
> static struct nvmem_device *of_nvmem_find(struct device_node *nvmem_np)
> {
> struct device *d;
> @@ -88,7 +83,7 @@ static struct nvmem_device *of_nvmem_find(struct device_node *nvmem_np)
> if (!nvmem_np)
> return NULL;
>
> - d = bus_find_device(&nvmem_bus_type, NULL, nvmem_np, of_nvmem_match);
> + d = bus_find_device_by_of_node(&nvmem_bus_type, nvmem_np);
>
> if (!d)
> return NULL;
> diff --git a/drivers/of/of_mdio.c b/drivers/of/of_mdio.c
> index 44f53496cab1..000b95787df1 100644
> --- a/drivers/of/of_mdio.c
> +++ b/drivers/of/of_mdio.c
> @@ -280,12 +280,6 @@ int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
> }
> EXPORT_SYMBOL(of_mdiobus_register);
>
> -/* Helper function for of_phy_find_device */
> -static int of_phy_match(struct device *dev, const void *phy_np)
> -{
> - return dev->of_node == phy_np;
> -}
> -
> /**
> * of_phy_find_device - Give a PHY node, find the phy_device
> * @phy_np: Pointer to the phy's device tree node
> @@ -301,7 +295,7 @@ struct phy_device *of_phy_find_device(struct device_node *phy_np)
> if (!phy_np)
> return NULL;
>
> - d = bus_find_device(&mdio_bus_type, NULL, phy_np, of_phy_match);
> + d = bus_find_device_by_of_node(&mdio_bus_type, phy_np);
> if (d) {
> mdiodev = to_mdio_device(d);
> if (mdiodev->flags & MDIO_DEVICE_FLAG_PHY)
> diff --git a/drivers/of/platform.c b/drivers/of/platform.c
> index 7801e25e6895..b47a2292fe8e 100644
> --- a/drivers/of/platform.c
> +++ b/drivers/of/platform.c
> @@ -37,11 +37,6 @@ static const struct of_device_id of_skipped_node_table[] = {
> {} /* Empty terminated list */
> };
>
> -static int of_dev_node_match(struct device *dev, const void *data)
> -{
> - return dev->of_node == data;
> -}
> -
> /**
> * of_find_device_by_node - Find the platform_device associated with a node
> * @np: Pointer to device tree node
> @@ -55,7 +50,7 @@ struct platform_device *of_find_device_by_node(struct device_node *np)
> {
> struct device *dev;
>
> - dev = bus_find_device(&platform_bus_type, NULL, np, of_dev_node_match);
> + dev = bus_find_device_by_of_node(&platform_bus_type, np);
> return dev ? to_platform_device(dev) : NULL;
> }
> EXPORT_SYMBOL(of_find_device_by_node);
> diff --git a/drivers/regulator/of_regulator.c b/drivers/regulator/of_regulator.c
> index 397918ebba55..20dcc9c03adc 100644
> --- a/drivers/regulator/of_regulator.c
> +++ b/drivers/regulator/of_regulator.c
> @@ -460,16 +460,11 @@ struct regulator_init_data *regulator_of_get_init_data(struct device *dev,
> return NULL;
> }
>
> -static int of_node_match(struct device *dev, const void *data)
> -{
> - return dev->of_node == data;
> -}
> -
> struct regulator_dev *of_find_regulator_by_node(struct device_node *np)
> {
> struct device *dev;
>
> - dev = class_find_device(®ulator_class, NULL, np, of_node_match);
> + dev = class_find_device_by_of_node(®ulator_class, np);
>
> return dev ? dev_to_rdev(dev) : NULL;
> }
> diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
> index 75ac046cae52..a591da87981a 100644
> --- a/drivers/spi/spi.c
> +++ b/drivers/spi/spi.c
> @@ -3652,37 +3652,25 @@ EXPORT_SYMBOL_GPL(spi_write_then_read);
> /*-------------------------------------------------------------------------*/
>
> #if IS_ENABLED(CONFIG_OF)
> -static int __spi_of_device_match(struct device *dev, const void *data)
> -{
> - return dev->of_node == data;
> -}
> -
> /* must call put_device() when done with returned spi_device device */
> struct spi_device *of_find_spi_device_by_node(struct device_node *node)
> {
> - struct device *dev = bus_find_device(&spi_bus_type, NULL, node,
> - __spi_of_device_match);
> + struct device *dev = bus_find_device_by_of_node(&spi_bus_type, node);
> +
> return dev ? to_spi_device(dev) : NULL;
> }
> EXPORT_SYMBOL_GPL(of_find_spi_device_by_node);
> #endif /* IS_ENABLED(CONFIG_OF) */
>
> #if IS_ENABLED(CONFIG_OF_DYNAMIC)
> -static int __spi_of_controller_match(struct device *dev, const void *data)
> -{
> - return dev->of_node == data;
> -}
> -
> /* the spi controllers are not using spi_bus, so we find it with another way */
> static struct spi_controller *of_find_spi_controller_by_node(struct device_node *node)
> {
> struct device *dev;
>
> - dev = class_find_device(&spi_master_class, NULL, node,
> - __spi_of_controller_match);
> + dev = class_find_device_by_of_node(&spi_master_class, node);
> if (!dev && IS_ENABLED(CONFIG_SPI_SLAVE))
> - dev = class_find_device(&spi_slave_class, NULL, node,
> - __spi_of_controller_match);
> + dev = class_find_device_by_of_node(&spi_slave_class, node);
> if (!dev)
> return NULL;
>
> diff --git a/include/linux/device.h b/include/linux/device.h
> index 3ba376b8b456..29d8d7ad41e6 100644
> --- a/include/linux/device.h
> +++ b/include/linux/device.h
> @@ -186,6 +186,18 @@ static inline struct device *bus_find_device_by_name(struct bus_type *bus,
> return bus_find_device(bus, start, name, device_match_name);
> }
>
> +/**
> + * bus_find_device_by_of_node : device iterator for locating a particular device
> + * matching the of_node.
> + * @bus: bus type
> + * @np: of_node of the device to match.
> + */
> +static inline struct device *
> +bus_find_device_by_of_node(struct bus_type *bus, const struct device_node *np)
> +{
> + return bus_find_device(bus, NULL, np, device_match_of_node);
> +}
> +
> struct device *subsys_find_device_by_id(struct bus_type *bus, unsigned int id,
> struct device *hint);
> int bus_for_each_drv(struct bus_type *bus, struct device_driver *start,
> @@ -366,6 +378,19 @@ static inline struct device *driver_find_device_by_name(struct device_driver *dr
> return driver_find_device(drv, NULL, name, device_match_name);
> }
>
> +/**
> + * driver_find_device_by_of_node- device iterator for locating a particular device
> + * by of_node pointer.
> + * @driver: the driver we're iterating
> + * @np: of_node pointer to match.
> + */
> +static inline struct device *
> +driver_find_device_by_of_node(struct device_driver *drv,
> + const struct device_node *np)
> +{
> + return driver_find_device(drv, NULL, np, device_match_of_node);
> +}
> +
> void driver_deferred_probe_add(struct device *dev);
> int driver_deferred_probe_check_state(struct device *dev);
> int driver_deferred_probe_check_state_continue(struct device *dev);
> @@ -507,6 +532,18 @@ static inline struct device *class_find_device_by_name(struct class *class,
> return class_find_device(class, NULL, name, device_match_name);
> }
>
> +/**
> + * class_find_device_by_of_node : device iterator for locating a particular device
> + * matching the of_node.
> + * @class: class type
> + * @np: of_node of the device to match.
> + */
> +static inline struct device *
> +class_find_device_by_of_node(struct class *class, const struct device_node *np)
> +{
> + return class_find_device(class, NULL, np, device_match_of_node);
> +}
> +
> struct class_attribute {
> struct attribute attr;
> ssize_t (*show)(struct class *class, struct class_attribute *attr,
> diff --git a/sound/soc/rockchip/rk3399_gru_sound.c b/sound/soc/rockchip/rk3399_gru_sound.c
> index c16b0ffe8cfc..d951100bf770 100644
> --- a/sound/soc/rockchip/rk3399_gru_sound.c
> +++ b/sound/soc/rockchip/rk3399_gru_sound.c
> @@ -422,11 +422,6 @@ static const struct dailink_match_data dailink_match[] = {
> },
> };
>
> -static int of_dev_node_match(struct device *dev, const void *data)
> -{
> - return dev->of_node == data;
> -}
> -
> static int rockchip_sound_codec_node_match(struct device_node *np_codec)
> {
> struct device *dev;
> @@ -438,8 +433,8 @@ static int rockchip_sound_codec_node_match(struct device_node *np_codec)
> continue;
>
> if (dailink_match[i].bus_type) {
> - dev = bus_find_device(dailink_match[i].bus_type, NULL,
> - np_codec, of_dev_node_match);
> + dev = bus_find_device_by_of_node(dailink_match[i].bus_type,
> + np_codec);
> if (!dev)
> continue;
> put_device(dev);
> --
> 2.21.0
>
Thanks,
Moritz
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