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omap: Split i2c platform init for mach-omap1 and mach-omap2

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Otherwise we cannot limit new mux code to mach-omap2.
The same signal names should eventually work for other
omaps under mach-omap2.

Note that these pins don't need to be OMAP_PIN_INPUT_PULLUP,
just OMAP_PIN_INPUT is enough.

Cc: Jarkko Nikula <jhnikula@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Tony Lindgren 2009-12-11 16:16:32 -08:00
parent 4b715efccf
commit b63128e812
7 changed files with 137 additions and 55 deletions
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3
arch/arm/mach-omap1/Makefile
View file

@ -18,6 +18,9 @@ obj-$(CONFIG_PM) += pm.o sleep.o
obj-$(CONFIG_OMAP_MBOX_FWK) += mailbox_mach.o
mailbox_mach-objs := mailbox.o
i2c-omap-$(CONFIG_I2C_OMAP) := i2c.o
obj-y += $(i2c-omap-m) $(i2c-omap-y)
led-y := leds.o
# Specific board support

33
arch/arm/mach-omap1/i2c.c Normal file
View file

@ -0,0 +1,33 @@
/*
* Helper module for board specific I2C bus registration
*
* Copyright (C) 2009 Nokia Corporation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#include <plat/i2c.h>
#include <plat/mux.h>
int __init omap_register_i2c_bus(int bus_id, u32 clkrate,
struct i2c_board_info const *info,
unsigned len)
{
omap_cfg_reg(I2C_SDA);
omap_cfg_reg(I2C_SCL);
return omap_plat_register_i2c_bus(bus_id, clkrate, info, len);
}

3
arch/arm/mach-omap2/Makefile
View file

@ -64,6 +64,9 @@ iommu-$(CONFIG_ARCH_OMAP3) += omap3-iommu.o
obj-$(CONFIG_OMAP_IOMMU) += $(iommu-y)
i2c-omap-$(CONFIG_I2C_OMAP) := i2c.o
obj-y += $(i2c-omap-m) $(i2c-omap-y)
# Specific board support
obj-$(CONFIG_MACH_OMAP_GENERIC) += board-generic.o
obj-$(CONFIG_MACH_OMAP_H4) += board-h4.o

56
arch/arm/mach-omap2/i2c.c Normal file
View file

@ -0,0 +1,56 @@
/*
* Helper module for board specific I2C bus registration
*
* Copyright (C) 2009 Nokia Corporation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#include <plat/cpu.h>
#include <plat/i2c.h>
#include <plat/mux.h>
#include "mux.h"
int __init omap_register_i2c_bus(int bus_id, u32 clkrate,
struct i2c_board_info const *info,
unsigned len)
{
if (cpu_is_omap24xx()) {
const int omap24xx_pins[][2] = {
{ M19_24XX_I2C1_SCL, L15_24XX_I2C1_SDA },
{ J15_24XX_I2C2_SCL, H19_24XX_I2C2_SDA },
};
int scl, sda;
scl = omap24xx_pins[bus_id - 1][0];
sda = omap24xx_pins[bus_id - 1][1];
omap_cfg_reg(sda);
omap_cfg_reg(scl);
}
/* First I2C bus is not muxable */
if (cpu_is_omap34xx() && bus_id > 1) {
char mux_name[sizeof("i2c2_scl.i2c2_scl")];
sprintf(mux_name, "i2c%i_scl.i2c%i_scl", bus_id, bus_id);
omap_mux_init_signal(mux_name, OMAP_PIN_INPUT);
sprintf(mux_name, "i2c%i_sda.i2c%i_sda", bus_id, bus_id);
omap_mux_init_signal(mux_name, OMAP_PIN_INPUT);
}
return omap_plat_register_i2c_bus(bus_id, clkrate, info, len);
}

44
arch/arm/plat-omap/i2c.c
View file

@ -80,47 +80,8 @@ static struct platform_device omap_i2c_devices[] = {
#endif
};
#if defined(CONFIG_ARCH_OMAP24XX)
static const int omap24xx_pins[][2] = {
{ M19_24XX_I2C1_SCL, L15_24XX_I2C1_SDA },
{ J15_24XX_I2C2_SCL, H19_24XX_I2C2_SDA },
};
#else
static const int omap24xx_pins[][2] = {};
#endif
#if defined(CONFIG_ARCH_OMAP34XX)
static const int omap34xx_pins[][2] = {
{ K21_34XX_I2C1_SCL, J21_34XX_I2C1_SDA},
{ AF15_34XX_I2C2_SCL, AE15_34XX_I2C2_SDA},
{ AF14_34XX_I2C3_SCL, AG14_34XX_I2C3_SDA},
};
#else
static const int omap34xx_pins[][2] = {};
#endif
#define OMAP_I2C_CMDLINE_SETUP (BIT(31))
static void __init omap_i2c_mux_pins(int bus)
{
int scl, sda;
if (cpu_class_is_omap1()) {
scl = I2C_SCL;
sda = I2C_SDA;
} else if (cpu_is_omap24xx()) {
scl = omap24xx_pins[bus][0];
sda = omap24xx_pins[bus][1];
} else if (cpu_is_omap34xx()) {
scl = omap34xx_pins[bus][0];
sda = omap34xx_pins[bus][1];
} else {
return;
}
omap_cfg_reg(sda);
omap_cfg_reg(scl);
}
static int __init omap_i2c_nr_ports(void)
{
int ports = 0;
@ -156,7 +117,6 @@ static int __init omap_i2c_add_bus(int bus_id)
res[1].start = irq;
}
omap_i2c_mux_pins(bus_id - 1);
return platform_device_register(pdev);
}
@ -209,7 +169,7 @@ out:
subsys_initcall(omap_register_i2c_bus_cmdline);
/**
* omap_register_i2c_bus - register I2C bus with device descriptors
* omap_plat_register_i2c_bus - register I2C bus with device descriptors
* @bus_id: bus id counting from number 1
* @clkrate: clock rate of the bus in kHz
* @info: pointer into I2C device descriptor table or NULL
@ -217,7 +177,7 @@ subsys_initcall(omap_register_i2c_bus_cmdline);
*
* Returns 0 on success or an error code.
*/
int __init omap_register_i2c_bus(int bus_id, u32 clkrate,
int __init omap_plat_register_i2c_bus(int bus_id, u32 clkrate,
struct i2c_board_info const *info,
unsigned len)
{

14
arch/arm/plat-omap/include/plat/common.h
View file

@ -27,7 +27,7 @@
#ifndef __ARCH_ARM_MACH_OMAP_COMMON_H
#define __ARCH_ARM_MACH_OMAP_COMMON_H
#include <linux/i2c.h>
#include <plat/i2c.h>
struct sys_timer;
@ -36,18 +36,6 @@ extern void __iomem *gic_cpu_base_addr;
extern void omap_map_common_io(void);
extern struct sys_timer omap_timer;
#if defined(CONFIG_I2C_OMAP) || defined(CONFIG_I2C_OMAP_MODULE)
extern int omap_register_i2c_bus(int bus_id, u32 clkrate,
struct i2c_board_info const *info,
unsigned len);
#else
static inline int omap_register_i2c_bus(int bus_id, u32 clkrate,
struct i2c_board_info const *info,
unsigned len)
{
return 0;
}
#endif
/* IO bases for various OMAP processors */
struct omap_globals {

39
arch/arm/plat-omap/include/plat/i2c.h Normal file
View file

@ -0,0 +1,39 @@
/*
* Helper module for board specific I2C bus registration
*
* Copyright (C) 2009 Nokia Corporation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#include <linux/i2c.h>
#if defined(CONFIG_I2C_OMAP) || defined(CONFIG_I2C_OMAP_MODULE)
extern int omap_register_i2c_bus(int bus_id, u32 clkrate,
struct i2c_board_info const *info,
unsigned len);
#else
static inline int omap_register_i2c_bus(int bus_id, u32 clkrate,
struct i2c_board_info const *info,
unsigned len)
{
return 0;
}
#endif
int omap_plat_register_i2c_bus(int bus_id, u32 clkrate,
struct i2c_board_info const *info,
unsigned len);