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drivers: i2c: omap24xx_i2c: adopt omap_i2c driver to driver model

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Convert omap i2c driver to adopt i2c driver model

Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Mugunthan V N 2016-07-18 15:11:01 +05:30 • committed by Heiko Schocher
parent be243e4113
commit daa69ffe3d
1 changed files with 99 additions and 0 deletions
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99
drivers/i2c/omap24xx_i2c.c
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@ -39,6 +39,7 @@
*/
#include <common.h>
#include <dm.h>
#include <i2c.h>
#include <asm/arch/i2c.h>
@ -53,6 +54,14 @@ DECLARE_GLOBAL_DATA_PTR;
/* Absolutely safe for status update at 100 kHz I2C: */
#define I2C_WAIT 200
struct omap_i2c {
struct udevice *clk;
struct i2c *regs;
unsigned int speed;
int waitdelay;
int clk_id;
};
static int omap24_i2c_findpsc(u32 *pscl, u32 *psch, uint speed)
{
unsigned int sampleclk, prescaler;
@ -667,6 +676,7 @@ wr_exit:
return i2c_error;
}
#ifndef CONFIG_DM_I2C
/*
* The legacy I2C functions. These need to get removed once
* all users of this driver are converted to DM.
@ -811,3 +821,92 @@ U_BOOT_I2C_ADAP_COMPLETE(omap24_4, omap24_i2c_init, omap24_i2c_probe,
#endif
#endif
#endif
#else /* CONFIG_DM_I2C */
static int omap_i2c_xfer(struct udevice *bus, struct i2c_msg *msg, int nmsgs)
{
struct omap_i2c *priv = dev_get_priv(bus);
int ret;
debug("i2c_xfer: %d messages\n", nmsgs);
for (; nmsgs > 0; nmsgs--, msg++) {
debug("i2c_xfer: chip=0x%x, len=0x%x\n", msg->addr, msg->len);
if (msg->flags & I2C_M_RD) {
ret = __omap24_i2c_read(priv->regs, priv->waitdelay,
msg->addr, 0, 0, msg->buf,
msg->len);
} else {
ret = __omap24_i2c_write(priv->regs, priv->waitdelay,
msg->addr, 0, 0, msg->buf,
msg->len);
}
if (ret) {
debug("i2c_write: error sending\n");
return -EREMOTEIO;
}
}
return 0;
}
static int omap_i2c_set_bus_speed(struct udevice *bus, unsigned int speed)
{
struct omap_i2c *priv = dev_get_priv(bus);
priv->speed = speed;
return __omap24_i2c_setspeed(priv->regs, speed, &priv->waitdelay);
}
static int omap_i2c_probe_chip(struct udevice *bus, uint chip_addr,
uint chip_flags)
{
struct omap_i2c *priv = dev_get_priv(bus);
return __omap24_i2c_probe(priv->regs, priv->waitdelay, chip_addr);
}
static int omap_i2c_probe(struct udevice *bus)
{
struct omap_i2c *priv = dev_get_priv(bus);
__omap24_i2c_init(priv->regs, priv->speed, 0, &priv->waitdelay);
return 0;
}
static int omap_i2c_ofdata_to_platdata(struct udevice *bus)
{
struct omap_i2c *priv = dev_get_priv(bus);
priv->regs = map_physmem(dev_get_addr(bus), sizeof(void *),
MAP_NOCACHE);
priv->speed = CONFIG_SYS_OMAP24_I2C_SPEED;
return 0;
}
static const struct dm_i2c_ops omap_i2c_ops = {
.xfer = omap_i2c_xfer,
.probe_chip = omap_i2c_probe_chip,
.set_bus_speed = omap_i2c_set_bus_speed,
};
static const struct udevice_id omap_i2c_ids[] = {
{ .compatible = "ti,omap4-i2c" },
{ }
};
U_BOOT_DRIVER(i2c_omap) = {
.name = "i2c_omap",
.id = UCLASS_I2C,
.of_match = omap_i2c_ids,
.ofdata_to_platdata = omap_i2c_ofdata_to_platdata,
.probe = omap_i2c_probe,
.priv_auto_alloc_size = sizeof(struct omap_i2c),
.ops = &omap_i2c_ops,
.flags = DM_FLAG_PRE_RELOC,
};
#endif /* CONFIG_DM_I2C */