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sh-pfc: Configure pins as GPIOs at request time when handled externally

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When a GPIO is handled by a separate driver the pinmux
gpio_set_direction() handler won't be called. The pin mux type then need
to be configured to GPIO at request time.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
This commit is contained in:
Laurent Pinchart 2013-03-10 17:30:25 +01:00 committed by Simon Horman
parent ceef91dcc0
commit e3c470510b
2 changed files with 27 additions and 21 deletions
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37
drivers/pinctrl/sh-pfc/core.c
View File

@ -268,7 +268,7 @@ int sh_pfc_config_mux(struct sh_pfc *pfc, unsigned mark, int pinmux_type)
int ret;
switch (pinmux_type) {
case PINMUX_TYPE_GPIO:
case PINMUX_TYPE_FUNCTION:
range = NULL;
break;
@ -297,6 +297,8 @@ int sh_pfc_config_mux(struct sh_pfc *pfc, unsigned mark, int pinmux_type)
enum_id = 0;
field = 0;
value = 0;
/* Iterate over all the configuration fields we need to update. */
while (1) {
pos = sh_pfc_mark_to_enum(pfc, mark, pos, &enum_id);
if (pos < 0)
@ -305,18 +307,20 @@ int sh_pfc_config_mux(struct sh_pfc *pfc, unsigned mark, int pinmux_type)
if (!enum_id)
break;
/* first check if this is a function enum */
/* Check if the configuration field selects a function. If it
* doesn't, skip the field if it's not applicable to the
* requested pinmux type.
*/
in_range = sh_pfc_enum_in_range(enum_id, &pfc->info->function);
if (!in_range) {
/* not a function enum */
if (range) {
/*
* other range exists, so this pin is
* a regular GPIO pin that now is being
* bound to a specific direction.
*
* for this case we only allow function enums
* and the enums that match the other range.
if (pinmux_type == PINMUX_TYPE_FUNCTION) {
/* Functions are allowed to modify all
* fields.
*/
in_range = 1;
} else if (pinmux_type != PINMUX_TYPE_GPIO) {
/* Input/output types can only modify fields
* that correspond to their respective ranges.
*/
in_range = sh_pfc_enum_in_range(enum_id, range);
@ -327,17 +331,8 @@ int sh_pfc_config_mux(struct sh_pfc *pfc, unsigned mark, int pinmux_type)
*/
if (in_range && enum_id == range->force)
continue;
} else {
/*
* no other range exists, so this pin
* must then be of the function type.
*
* allow function type pins to select
* any combination of function/in/out
* in their MARK lists.
*/
in_range = 1;
}
/* GPIOs are only allowed to modify function fields. */
}
if (!in_range)

11
drivers/pinctrl/sh-pfc/pinctrl.c
View File

@ -182,6 +182,17 @@ static int sh_pfc_gpio_request_enable(struct pinctrl_dev *pctldev,
goto done;
}
if (!pfc->gpio) {
/* If GPIOs are handled externally the pin mux type need to be
* set to GPIO here.
*/
const struct sh_pfc_pin *pin = &pfc->info->pins[idx];
ret = sh_pfc_config_mux(pfc, pin->enum_id, PINMUX_TYPE_GPIO);
if (ret < 0)
goto done;
}
cfg->type = PINMUX_TYPE_GPIO;
ret = 0;