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author | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2015-02-24 07:59:38 +0100 |
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committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2015-02-24 07:59:38 +0100 |
commit | e1cc4d31f889428a4ca73120951389c756404184 (patch) | |
tree | 4a2028c750e19f5d36d0aa7545bda7cbacea9dd4 /drivers/i2c/i2c-uclass-compat.c | |
parent | 23d184d2fbc805bdd9fb41f2370cdce04a7894af (diff) | |
parent | 38dac81b3d0e777f301ca98100bfbcab01d616c2 (diff) | |
download | u-boot-imx-e1cc4d31f889428a4ca73120951389c756404184.zip u-boot-imx-e1cc4d31f889428a4ca73120951389c756404184.tar.gz u-boot-imx-e1cc4d31f889428a4ca73120951389c756404184.tar.bz2 |
Merge remote-tracking branch 'u-boot/master' into 'u-boot-arm/master'
Diffstat (limited to 'drivers/i2c/i2c-uclass-compat.c')
-rw-r--r-- | drivers/i2c/i2c-uclass-compat.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/drivers/i2c/i2c-uclass-compat.c b/drivers/i2c/i2c-uclass-compat.c new file mode 100644 index 0000000..223f238 --- /dev/null +++ b/drivers/i2c/i2c-uclass-compat.c @@ -0,0 +1,108 @@ +/* + * Copyright (c) 2014 Google, Inc + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <dm.h> +#include <errno.h> +#include <i2c.h> + +static int cur_busnum; + +static int i2c_compat_get_device(uint chip_addr, int alen, + struct udevice **devp) +{ + struct dm_i2c_chip *chip; + int ret; + + ret = i2c_get_chip_for_busnum(cur_busnum, chip_addr, alen, devp); + if (ret) + return ret; + chip = dev_get_parent_platdata(*devp); + if (chip->offset_len != alen) { + printf("I2C chip %x: requested alen %d does not match chip offset_len %d\n", + chip_addr, alen, chip->offset_len); + return -EADDRNOTAVAIL; + } + + return 0; +} + +int i2c_probe(uint8_t chip_addr) +{ + struct udevice *bus, *dev; + int ret; + + ret = uclass_get_device_by_seq(UCLASS_I2C, cur_busnum, &bus); + if (ret) { + debug("Cannot find I2C bus %d: err=%d\n", cur_busnum, ret); + return ret; + } + + if (!bus) + return -ENOENT; + + return dm_i2c_probe(bus, chip_addr, 0, &dev); +} + +int i2c_read(uint8_t chip_addr, unsigned int addr, int alen, uint8_t *buffer, + int len) +{ + struct udevice *dev; + int ret; + + ret = i2c_compat_get_device(chip_addr, alen, &dev); + if (ret) + return ret; + + return dm_i2c_read(dev, addr, buffer, len); +} + +int i2c_write(uint8_t chip_addr, unsigned int addr, int alen, uint8_t *buffer, + int len) +{ + struct udevice *dev; + int ret; + + ret = i2c_compat_get_device(chip_addr, alen, &dev); + if (ret) + return ret; + + return dm_i2c_write(dev, addr, buffer, len); +} + +int i2c_get_bus_num_fdt(int node) +{ + struct udevice *bus; + int ret; + + ret = uclass_get_device_by_of_offset(UCLASS_I2C, node, &bus); + if (ret) + return ret; + + return bus->seq; +} + +unsigned int i2c_get_bus_num(void) +{ + return cur_busnum; +} + +int i2c_set_bus_num(unsigned int bus) +{ + cur_busnum = bus; + + return 0; +} + +void i2c_init(int speed, int slaveaddr) +{ + /* Nothing to do here - the init happens through driver model */ +} + +void board_i2c_init(const void *blob) +{ + /* Nothing to do here - the init happens through driver model */ +} |