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i2c: omap24xx_i2c: Use platdata to probe the device

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This allows the driver to be used without OF_CONTROL.
AM335x support DM_SPL but does not use SPL_OF_CONTROL. Enabling DM_I2C in
SPL thus requires that the omap I2C can be passed platdata.

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
This commit is contained in:
Jean-Jacques Hiblot 2018-12-07 14:50:42 +01:00 committed by Heiko Schocher
parent bca09ce4b0
commit 5f97ae6814
3 changed files with 37 additions and 10 deletions
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2
arch/arm/include/asm/arch-am33xx/i2c.h
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@ -6,6 +6,8 @@
#ifndef _I2C_AM33XX_H_
#define _I2C_AM33XX_H_
#include <asm/omap_i2c.h>
#define I2C_BASE1 0x44E0B000
#define I2C_BASE2 0x4802A000
#define I2C_BASE3 0x4819C000

24
arch/arm/include/asm/omap_i2c.h Normal file
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@ -0,0 +1,24 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _OMAP_I2C_H
#define _OMAP_I2C_H
#include <asm/arch/cpu.h>
#ifdef CONFIG_DM_I2C
/* Information about a GPIO bank */
struct omap_i2c_platdata {
ulong base; /* address of registers in physical memory */
int speed;
int ip_rev;
};
#endif
enum {
OMAP_I2C_REV_V1 = 0,
OMAP_I2C_REV_V2 = 1,
};
#endif /* _OMAP_I2C_H */

21
drivers/i2c/omap24xx_i2c.c
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@ -43,6 +43,7 @@
#include <i2c.h>
#include <asm/io.h>
#include <asm/omap_i2c.h>
/*
* Provide access to architecture-specific I2C header files for platforms
@ -61,11 +62,6 @@
/* Absolutely safe for status update at 100 kHz I2C: */
#define I2C_WAIT 200
enum {
OMAP_I2C_REV_V1 = 0,
OMAP_I2C_REV_V2 = 1,
};
enum {
OMAP_I2C_REV_REG = 0, /* Only on IP V1 (OMAP34XX) */
OMAP_I2C_IE_REG, /* Only on IP V1 (OMAP34XX) */
@ -1051,8 +1047,12 @@ static int omap_i2c_probe_chip(struct udevice *bus, uint chip_addr,
static int omap_i2c_probe(struct udevice *bus)
{
struct omap_i2c *priv = dev_get_priv(bus);
struct omap_i2c_platdata *plat = dev_get_platdata(bus);
priv->ip_rev = dev_get_driver_data(bus);
priv->speed = plat->speed;
priv->regs = map_physmem(plat->base, sizeof(void *),
MAP_NOCACHE);
priv->ip_rev = plat->ip_rev;
__omap24_i2c_init(priv->regs, priv->ip_rev, priv->speed, 0,
&priv->waitdelay);
@ -1063,11 +1063,11 @@ static int omap_i2c_probe(struct udevice *bus)
#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
static int omap_i2c_ofdata_to_platdata(struct udevice *bus)
{
struct omap_i2c *priv = dev_get_priv(bus);
struct omap_i2c_platdata *plat = dev_get_platdata(bus);
priv->regs = map_physmem(devfdt_get_addr(bus), sizeof(void *),
MAP_NOCACHE);
priv->speed = CONFIG_SYS_OMAP24_I2C_SPEED;
plat->base = devfdt_get_addr(bus);
plat->speed = dev_read_u32_default(bus, "clock-frequency", 100000);
plat->ip_rev = dev_get_driver_data(bus);
return 0;
}
@ -1091,6 +1091,7 @@ U_BOOT_DRIVER(i2c_omap) = {
#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
.of_match = omap_i2c_ids,
.ofdata_to_platdata = omap_i2c_ofdata_to_platdata,
.platdata_auto_alloc_size = sizeof(struct omap_i2c_platdata),
#endif
.probe = omap_i2c_probe,
.priv_auto_alloc_size = sizeof(struct omap_i2c),