arm/mach-omap1/i2c.c

1 // SPDX-License-Identifier: GPL-2.0-only
3  * Helper module for board specific I2C bus registration
8 #include <linux/i2c.h>
9 #include <linux/platform_data/i2c-omap.h>
13 #include "i2c.h"
18 static const char name[] = "omap_i2c";  variable
39 		return -EINVAL;  in omap_i2c_add_bus()
43 	pdev = &omap_i2c_devices[bus_id - 1];  in omap_i2c_add_bus()
44 	pdev->id = bus_id;  in omap_i2c_add_bus()
45 	pdev->name = name;  in omap_i2c_add_bus()
46 	pdev->num_resources = ARRAY_SIZE(i2c_resources);  in omap_i2c_add_bus()
53 	pdev->resource = res;  in omap_i2c_add_bus()
56 	pdata->rev = OMAP_I2C_IP_VERSION_1;  in omap_i2c_add_bus()
58 	/* all OMAP1 I2C are implemented like this */  in omap_i2c_add_bus()
59 	pdata->flags = OMAP_I2C_FLAG_NO_FIFO |  in omap_i2c_add_bus()
64 	/* how the cpu bus is wired up differs for 7xx only */  in omap_i2c_add_bus()
66 	pdata->flags |= OMAP_I2C_FLAG_BUS_SHIFT_2;  in omap_i2c_add_bus()
68 	pdev->dev.platform_data = pdata;  in omap_i2c_add_bus()
79  * omap_i2c_bus_setup - Process command line options for the I2C bus speed
82  * This function allow to override the default I2C bus speed for given I2C
83  * bus with a command line option.
97 	i2c_pdata[ints[1] - 1].clkrate = ints[2];  in omap_i2c_bus_setup()
98 	i2c_pdata[ints[1] - 1].clkrate |= OMAP_I2C_CMDLINE_SETUP;  in omap_i2c_bus_setup()
125  * omap_register_i2c_bus - register I2C bus with device descriptors
126  * @bus_id: bus id counting from number 1
127  * @clkrate: clock rate of the bus in kHz
128  * @info: pointer into I2C device descriptor table or NULL
147 	if (!i2c_pdata[bus_id - 1].clkrate)  in omap_register_i2c_bus()
148 		i2c_pdata[bus_id - 1].clkrate = clkrate;  in omap_register_i2c_bus()
150 	i2c_pdata[bus_id - 1].clkrate &= ~OMAP_I2C_CMDLINE_SETUP;  in omap_register_i2c_bus()
152 	return omap_i2c_add_bus(&i2c_pdata[bus_id - 1], bus_id);  in omap_register_i2c_bus()