diff options
Diffstat (limited to 'drivers/i2c/omap24xx_i2c.c')
| -rw-r--r-- | drivers/i2c/omap24xx_i2c.c | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/drivers/i2c/omap24xx_i2c.c b/drivers/i2c/omap24xx_i2c.c index 8dea5fa..0006343 100644 --- a/drivers/i2c/omap24xx_i2c.c +++ b/drivers/i2c/omap24xx_i2c.c @@ -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 */ |