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Davinci: Table driven pinmux configuration

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Davinci: Table driven pinmux configuration

Add code to allow pinmux_config tables to be grouped and configured
as a single resource. This removes multiple calls to the pinmux
configuration code from board_init and allows pinmuxes to be
individually configured and added by data manipulation only.

All related #ifdefs can the be removed from board_init code and
since the compiler optimises away statics, #ifdefs can be reduced in
the data definitions as well.

Signed-off-by: Nick Thompson <nick.thompson@gefanuc.com>
This commit is contained in:
Nick Thompson 2009-12-12 12:10:51 -05:00 • committed by Tom Rix
parent 1270ec13d4
commit 90110e0eab
2 changed files with 44 additions and 0 deletions
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31
board/davinci/common/misc.c
View file

@ -155,3 +155,34 @@ int davinci_configure_pin_mux(const struct pinmux_config *pins,
return 0;
}
/*
* Configure multiple pinmux resources.
*
* Takes an pinmux_resource array of pinmux_config and pin counts:
*
* const struct pinmux_resource pinmuxes[] = {
* PINMUX_ITEM(uart_pins),
* PINMUX_ITEM(i2c_pins),
* };
*
* The number of items in the array must be passed (ARRAY_SIZE can provide
* this value conveniently).
*
* Each item entry is configured in the defined order. If configuration
* of any item fails, -1 is returned and none of the following items are
* configured. On success, 0 is returned.
*/
int davinci_configure_pin_mux_items(const struct pinmux_resource *item,
const int n_items)
{
int i;
for (i = 0; i < n_items; i++) {
if (davinci_configure_pin_mux(item[i].pins,
item[i].n_pins) != 0)
return -1;
}
return 0;
}

13
board/davinci/common/misc.h
View file

@ -34,8 +34,21 @@ struct pinmux_config {
unsigned char field; /* field number */
};
/* pin table definition */
struct pinmux_resource {
const struct pinmux_config *pins;
const int n_pins;
};
#define PINMUX_ITEM(item) { \
.pins = item, \
.n_pins = ARRAY_SIZE(item) \
}
int dvevm_read_mac_address(uint8_t *buf);
void dv_configure_mac_address(uint8_t *rom_enetaddr);
int davinci_configure_pin_mux(const struct pinmux_config *pins, int n_pins);
int davinci_configure_pin_mux_items(const struct pinmux_resource *item,
int n_items);
#endif /* __MISC_H */