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OMAP2+: mux: Fixed gpio mux mode analysis 

OMAP_MODE_GPIO() macro verified only OMAP_MUX_MODE4.
It is not correct for following platforms:
    2430 - gpio mux mode 3
    44xx - gpio mux mode 3
    54xx - gpio mux mode 6

Patch reserves first 3 bits in partition flags for storing gpio mux
mode in same format as stored in control pad register.
Modified OMAP_MODE_GPIO() macro to handle all possible cases of gpio mux mode.
Modified omap_mux_init() flags of omap34xx to include OMAP_MUX_GPIO_IN_MODE4.

Signed-off-by: Oleg Matcovschi <oleg.matcovschi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Oleg Matcovschi 2012-11-26 17:02:03 -08:00 committed by Tony Lindgren
parent ca2e16faa7
commit 421e845099
3 changed files with 20 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
arch/arm/mach-omap2/mux.c
View File

@ -135,10 +135,7 @@ static int __init _omap_mux_init_gpio(struct omap_mux_partition *partition,
old_mode = omap_mux_read(partition, gpio_mux->reg_offset);
mux_mode = val & ~(OMAP_MUX_NR_MODES - 1);
if (partition->flags & OMAP_MUX_GPIO_IN_MODE3)
mux_mode |= OMAP_MUX_MODE3;
else
mux_mode |= OMAP_MUX_MODE4;
mux_mode |= partition->gpio;
pr_debug("%s: Setting signal %s.gpio%i 0x%04x -> 0x%04x\n", __func__,
gpio_mux->muxnames[0], gpio, old_mode, mux_mode);
omap_mux_write(partition, mux_mode, gpio_mux->reg_offset);
@ -800,7 +797,7 @@ int __init omap_mux_late_init(void)
struct omap_mux *m = &e->mux;
u16 mode = omap_mux_read(partition, m->reg_offset);
if (OMAP_MODE_GPIO(mode))
if (OMAP_MODE_GPIO(partition, mode))
continue;
#ifndef CONFIG_DEBUG_FS
@ -1065,7 +1062,7 @@ static void __init omap_mux_init_list(struct omap_mux_partition *partition,
}
#else
/* Skip pins that are not muxed as GPIO by bootloader */
if (!OMAP_MODE_GPIO(omap_mux_read(partition,
if (!OMAP_MODE_GPIO(partition, omap_mux_read(partition,
superset->reg_offset))) {
superset++;
continue;
@ -1132,6 +1129,7 @@ int __init omap_mux_init(const char *name, u32 flags,
partition->name = name;
partition->flags = flags;
partition->gpio = flags & OMAP_MUX_MODE7;
partition->size = mux_size;
partition->phys = mux_pbase;
partition->base = ioremap(mux_pbase, mux_size);

20
arch/arm/mach-omap2/mux.h
View File

@ -58,7 +58,8 @@
#define OMAP_PIN_OFF_INPUT_PULLDOWN (OMAP_OFF_EN | OMAP_OFF_PULL_EN)
#define OMAP_PIN_OFF_WAKEUPENABLE OMAP_WAKEUP_EN
#define OMAP_MODE_GPIO(x) (((x) & OMAP_MUX_MODE7) == OMAP_MUX_MODE4)
#define OMAP_MODE_GPIO(partition, x) (((x) & OMAP_MUX_MODE7) == \
partition->gpio)
#define OMAP_MODE_UART(x) (((x) & OMAP_MUX_MODE7) == OMAP_MUX_MODE0)
/* Flags for omapX_mux_init */
@ -79,13 +80,20 @@
/*
* omap_mux_init flags definition:
*
* OMAP_GPIO_MUX_MODE, bits 0-2: gpio muxing mode, same like pad control
* register which includes values from 0-7.
* OMAP_MUX_REG_8BIT: Ensure that access to padconf is done in 8 bits.
* The default value is 16 bits.
* OMAP_MUX_GPIO_IN_MODE3: The GPIO is selected in mode3.
* The default is mode4.
*/
#define OMAP_MUX_REG_8BIT (1 << 0)
#define OMAP_MUX_GPIO_IN_MODE3 (1 << 1)
#define OMAP_MUX_GPIO_IN_MODE0 OMAP_MUX_MODE0
#define OMAP_MUX_GPIO_IN_MODE1 OMAP_MUX_MODE1
#define OMAP_MUX_GPIO_IN_MODE2 OMAP_MUX_MODE2
#define OMAP_MUX_GPIO_IN_MODE3 OMAP_MUX_MODE3
#define OMAP_MUX_GPIO_IN_MODE4 OMAP_MUX_MODE4
#define OMAP_MUX_GPIO_IN_MODE5 OMAP_MUX_MODE5
#define OMAP_MUX_GPIO_IN_MODE6 OMAP_MUX_MODE6
#define OMAP_MUX_GPIO_IN_MODE7 OMAP_MUX_MODE7
#define OMAP_MUX_REG_8BIT (1 << 3)
/**
* struct omap_board_data - board specific device data
@ -105,6 +113,7 @@ struct omap_board_data {
* struct mux_partition - contain partition related information
* @name: name of the current partition
* @flags: flags specific to this partition
* @gpio: gpio mux mode
* @phys: physical address
* @size: partition size
* @base: virtual address after ioremap
@ -114,6 +123,7 @@ struct omap_board_data {
struct omap_mux_partition {
const char *name;
u32 flags;
u32 gpio;
u32 phys;
u32 size;
void __iomem *base;

2
arch/arm/mach-omap2/mux34xx.c
View File

@ -2053,7 +2053,7 @@ int __init omap3_mux_init(struct omap_board_mux *board_subset, int flags)
return -EINVAL;
}
return omap_mux_init("core", 0,
return omap_mux_init("core", OMAP_MUX_GPIO_IN_MODE4,
OMAP3_CONTROL_PADCONF_MUX_PBASE,
OMAP3_CONTROL_PADCONF_MUX_SIZE,
omap3_muxmodes, package_subset, board_subset,