Mirrors/u-boot
2
0
Fork 0
mirror of https://github.com/AsahiLinux/u-boot synced 2024-11-28 07:31:15 +00:00
Code Issues Projects Releases Packages Wiki Activity

i2c, zynq: convert zynq i2c driver to new multibus/multiadapter framework

Browse source 
- add zync i2c driver to new multibus/multiadpater support
- adapted all config files, which uses this driver

Signed-off-by: Heiko Schocher <hs@denx.de>
Cc: Joe Hershberger <joe.hershberger@ni.com>
Cc: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Heiko Schocher 2013-11-08 07:30:53 +01:00
parent 6789e84eca
commit 0bdffe71fd
4 changed files with 26 additions and 18 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
README
View file

@ -2071,6 +2071,11 @@ CBFS (Coreboot Filesystem) support
- CONFIG_SYS_OMAP24_I2C_SPEED4 speed channel 4
- CONFIG_SYS_OMAP24_I2C_SLAVE4 slave addr channel 4
- drivers/i2c/zynq_i2c.c
- activate this driver with CONFIG_SYS_I2C_ZYNQ
- set CONFIG_SYS_I2C_ZYNQ_SPEED for speed setting
- set CONFIG_SYS_I2C_ZYNQ_SLAVE for slave addr
additional defines:
CONFIG_SYS_NUM_I2C_BUSES

2
drivers/i2c/Makefile
View file

@ -28,4 +28,4 @@ obj-$(CONFIG_SYS_I2C_RCAR) += rcar_i2c.o
obj-$(CONFIG_SYS_I2C_SH) += sh_i2c.o
obj-$(CONFIG_SYS_I2C_SOFT) += soft_i2c.o
obj-$(CONFIG_SYS_I2C_TEGRA) += tegra_i2c.o
obj-$(CONFIG_ZYNQ_I2C) += zynq_i2c.o
obj-$(CONFIG_SYS_I2C_ZYNQ) += zynq_i2c.o

29
drivers/i2c/zynq_i2c.c
View file

@ -74,7 +74,8 @@ static struct zynq_i2c_registers *zynq_i2c =
(struct zynq_i2c_registers *)ZYNQ_I2C_BASE;
/* I2C init called by cmd_i2c when doing 'i2c reset'. */
void i2c_init(int requested_speed, int slaveadd)
static void zynq_i2c_init(struct i2c_adapter *adap, int requested_speed,
int slaveadd)
{
/* 111MHz / ( (3 * 17) * 22 ) = ~100KHz */
writel((16 << ZYNQ_I2C_CONTROL_DIV_B_SHIFT) |
@ -151,7 +152,7 @@ static u32 zynq_i2c_wait(u32 mask)
* I2C probe called by cmd_i2c when doing 'i2c probe'.
* Begin read, nak data byte, end.
*/
int i2c_probe(u8 dev)
static int zynq_i2c_probe(struct i2c_adapter *adap, u8 dev)
{
/* Attempt to read a byte */
setbits_le32(&zynq_i2c->control, ZYNQ_I2C_CONTROL_CLR_FIFO |
@ -170,7 +171,8 @@ int i2c_probe(u8 dev)
* I2C read called by cmd_i2c when doing 'i2c read' and by cmd_eeprom.c
* Begin write, send address byte(s), begin read, receive data bytes, end.
*/
int i2c_read(u8 dev, uint addr, int alen, u8 *data, int length)
static int zynq_i2c_read(struct i2c_adapter *adap, u8 dev, uint addr,
int alen, u8 *data, int length)
{
u32 status;
u32 i = 0;
@ -235,7 +237,8 @@ int i2c_read(u8 dev, uint addr, int alen, u8 *data, int length)
* I2C write called by cmd_i2c when doing 'i2c write' and by cmd_eeprom.c
* Begin write, send address byte(s), send data bytes, end.
*/
int i2c_write(u8 dev, uint addr, int alen, u8 *data, int length)
static int zynq_i2c_write(struct i2c_adapter *adap, u8 dev, uint addr,
int alen, u8 *data, int length)
{
u8 *cur_data = data;
@ -275,16 +278,16 @@ int i2c_write(u8 dev, uint addr, int alen, u8 *data, int length)
return 0;
}
int i2c_set_bus_num(unsigned int bus)
static unsigned int zynq_i2c_set_bus_speed(struct i2c_adapter *adap,
unsigned int speed)
{
/* Only support bus 0 */
if (bus > 0)
return -1;
if (speed != 1000000)
return -EINVAL;
return 0;
}
unsigned int i2c_get_bus_num(void)
{
/* Only support bus 0 */
return 0;
}
U_BOOT_I2C_ADAP_COMPLETE(zynq_0, zynq_i2c_init, zynq_i2c_probe, zynq_i2c_read,
zynq_i2c_write, zynq_i2c_set_bus_speed,
CONFIG_SYS_I2C_ZYNQ_SPEED, CONFIG_SYS_I2C_ZYNQ_SLAVE,
0)

8
include/configs/zynq.h
View file

@ -60,10 +60,10 @@
/* I2C */
#if defined(CONFIG_ZYNQ_I2C0) || defined(CONFIG_ZYNQ_I2C1)
# define CONFIG_CMD_I2C
# define CONFIG_ZYNQ_I2C
# define CONFIG_HARD_I2C
# define CONFIG_SYS_I2C_SPEED 100000
# define CONFIG_SYS_I2C_SLAVE 1
# define CONFIG_SYS_I2C
# define CONFIG_SYS_I2C_ZYNQ
# define CONFIG_SYS_I2C_ZYNQ_SPEED 100000
# define CONFIG_SYS_I2C_ZYNQ_SLAVE 1
#endif
#if defined(CONFIG_ZYNQ_DCC)