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authorMugunthan V N <mugunthanvnm@ti.com>2016-07-18 15:11:01 +0530
committerHeiko Schocher <hs@denx.de>2016-07-26 08:40:09 +0200
commitdaa69ffe3d4d603ccb7dfca92c33f19d9e1c2313 (patch)
tree21addeea37428ec82d14098ac117089d2c15237b /drivers/i2c
parentbe243e4113b6c3c302ee03050726358714f40ffe (diff)
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drivers: i2c: omap24xx_i2c: adopt omap_i2c driver to driver model
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>
Diffstat (limited to 'drivers/i2c')
-rw-r--r--drivers/i2c/omap24xx_i2c.c99
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 */