For better maintenance and possible code reuse in the future, split out OF parts into a separate module. Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> --- drivers/i2c/busses/Makefile | 3 ++ drivers/i2c/busses/i2c-designware-core.h | 6 +++ drivers/i2c/busses/i2c-designware-of.c | 50 ++++++++++++++++++ drivers/i2c/busses/i2c-designware-platdrv.c | 56 ++++----------------- 4 files changed, 68 insertions(+), 47 deletions(-) create mode 100644 drivers/i2c/busses/i2c-designware-of.c diff --git a/drivers/i2c/busses/Makefile b/drivers/i2c/busses/Makefile index a33aa107a05d2..cadcff3aad814 100644 --- a/drivers/i2c/busses/Makefile +++ b/drivers/i2c/busses/Makefile @@ -50,6 +50,9 @@ obj-$(CONFIG_I2C_CPM) += i2c-cpm.o obj-$(CONFIG_I2C_DAVINCI) += i2c-davinci.o obj-$(CONFIG_I2C_DESIGNWARE_CORE) += i2c-designware-core.o i2c-designware-core-objs := i2c-designware-common.o +ifeq ($(CONFIG_OF),y) +i2c-designware-core-objs += i2c-designware-of.o +endif i2c-designware-core-objs += i2c-designware-master.o ifeq ($(CONFIG_I2C_DESIGNWARE_SLAVE),y) i2c-designware-core-objs += i2c-designware-slave.o diff --git a/drivers/i2c/busses/i2c-designware-core.h b/drivers/i2c/busses/i2c-designware-core.h index 626959573f894..b3d7c04ffe1ae 100644 --- a/drivers/i2c/busses/i2c-designware-core.h +++ b/drivers/i2c/busses/i2c-designware-core.h @@ -382,3 +382,9 @@ static inline int i2c_dw_validate_speed(struct dw_i2c_dev *dev) return 0; } + +#if IS_ENABLED(CONFIG_OF) +int i2c_dw_of_configure(struct device *device); +#else +static inline int i2c_dw_of_configure(struct device *device) { return -ENODEV; } +#endif diff --git a/drivers/i2c/busses/i2c-designware-of.c b/drivers/i2c/busses/i2c-designware-of.c new file mode 100644 index 0000000000000..7434bce286b98 --- /dev/null +++ b/drivers/i2c/busses/i2c-designware-of.c @@ -0,0 +1,50 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Synopsys DesignWare I2C adapter driver. + * + * Based on the TI DAVINCI I2C adapter driver. + * + * Copyright (C) 2006 Texas Instruments. + * Copyright (C) 2007 MontaVista Software Inc. + * Copyright (C) 2009 Provigent Ltd. + */ +#include <linux/bits.h> +#include <linux/device.h> +#include <linux/err.h> +#include <linux/export.h> +#include <linux/io.h> +#include <linux/platform_device.h> +#include <linux/types.h> + +#include "i2c-designware-core.h" + +#define MSCC_ICPU_CFG_TWI_DELAY 0x0 +#define MSCC_ICPU_CFG_TWI_DELAY_ENABLE BIT(0) +#define MSCC_ICPU_CFG_TWI_SPIKE_FILTER 0x4 + +static int mscc_twi_set_sda_hold_time(struct dw_i2c_dev *dev) +{ + writel((dev->sda_hold_time << 1) | MSCC_ICPU_CFG_TWI_DELAY_ENABLE, + dev->ext + MSCC_ICPU_CFG_TWI_DELAY); + + return 0; +} + +int i2c_dw_of_configure(struct device *device) +{ + struct platform_device *pdev = to_platform_device(device); + struct dw_i2c_dev *dev = platform_get_drvdata(pdev); + + switch (dev->flags & MODEL_MASK) { + case MODEL_MSCC_OCELOT: + dev->ext = devm_platform_ioremap_resource(pdev, 1); + if (!IS_ERR(dev->ext)) + dev->set_sda_hold_time = mscc_twi_set_sda_hold_time; + break; + default: + break; + } + + return 0; +} +EXPORT_SYMBOL_GPL(i2c_dw_of_configure); diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c index d6c03d7179c7a..6780d636bac73 100644 --- a/drivers/i2c/busses/i2c-designware-platdrv.c +++ b/drivers/i2c/busses/i2c-designware-platdrv.c @@ -17,10 +17,8 @@ #include <linux/errno.h> #include <linux/i2c.h> #include <linux/interrupt.h> -#include <linux/io.h> #include <linux/kernel.h> #include <linux/module.h> -#include <linux/of.h> #include <linux/platform_data/i2c-designware.h> #include <linux/platform_device.h> #include <linux/pm.h> @@ -141,49 +139,6 @@ static inline int dw_i2c_acpi_configure(struct platform_device *pdev) } #endif -#ifdef CONFIG_OF -#define MSCC_ICPU_CFG_TWI_DELAY 0x0 -#define MSCC_ICPU_CFG_TWI_DELAY_ENABLE BIT(0) -#define MSCC_ICPU_CFG_TWI_SPIKE_FILTER 0x4 - -static int mscc_twi_set_sda_hold_time(struct dw_i2c_dev *dev) -{ - writel((dev->sda_hold_time << 1) | MSCC_ICPU_CFG_TWI_DELAY_ENABLE, - dev->ext + MSCC_ICPU_CFG_TWI_DELAY); - - return 0; -} - -static int dw_i2c_of_configure(struct platform_device *pdev) -{ - struct dw_i2c_dev *dev = platform_get_drvdata(pdev); - - switch (dev->flags & MODEL_MASK) { - case MODEL_MSCC_OCELOT: - dev->ext = devm_platform_ioremap_resource(pdev, 1); - if (!IS_ERR(dev->ext)) - dev->set_sda_hold_time = mscc_twi_set_sda_hold_time; - break; - default: - break; - } - - return 0; -} - -static const struct of_device_id dw_i2c_of_match[] = { - { .compatible = "snps,designware-i2c", }, - { .compatible = "mscc,ocelot-i2c", .data = (void *)MODEL_MSCC_OCELOT }, - {}, -}; -MODULE_DEVICE_TABLE(of, dw_i2c_of_match); -#else -static inline int dw_i2c_of_configure(struct platform_device *pdev) -{ - return -ENODEV; -} -#endif - static void dw_i2c_plat_pm_cleanup(struct dw_i2c_dev *dev) { pm_runtime_disable(dev->dev); @@ -254,7 +209,7 @@ static int dw_i2c_plat_probe(struct platform_device *pdev) dev->flags |= (uintptr_t)device_get_match_data(&pdev->dev); if (pdev->dev.of_node) - dw_i2c_of_configure(pdev); + i2c_dw_of_configure(&pdev->dev); if (has_acpi_companion(&pdev->dev)) dw_i2c_acpi_configure(pdev); @@ -419,6 +374,13 @@ static const struct dev_pm_ops dw_i2c_dev_pm_ops = { #define DW_I2C_DEV_PMOPS NULL #endif +static const struct of_device_id dw_i2c_of_match[] = { + { .compatible = "snps,designware-i2c", }, + { .compatible = "mscc,ocelot-i2c", .data = (void *)MODEL_MSCC_OCELOT }, + {} +}; +MODULE_DEVICE_TABLE(of, dw_i2c_of_match); + /* Work with hotplug and coldplug */ MODULE_ALIAS("platform:i2c_designware"); @@ -427,7 +389,7 @@ static struct platform_driver dw_i2c_driver = { .remove = dw_i2c_plat_remove, .driver = { .name = "i2c_designware", - .of_match_table = of_match_ptr(dw_i2c_of_match), + .of_match_table = dw_i2c_of_match, .acpi_match_table = ACPI_PTR(dw_i2c_acpi_match), .pm = DW_I2C_DEV_PMOPS, }, -- 2.26.2