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pcmcia: soc_common: add support for reset and bus enable GPIOs 

Add support to soc_common for controlling reset and bus enable GPIOs
from within the generic soc_common layer, rather than having
individual drivers having to perform this themselves.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
This commit is contained in:
Russell King 2016-08-31 08:49:45 +01:00
parent 7bfe49785b
commit 535e0abc05
2 changed files with 19 additions and 0 deletions
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16
drivers/pcmcia/soc_common.c
View File

@ -119,6 +119,7 @@ static void __soc_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt,
if (skt->ops->hw_shutdown)
skt->ops->hw_shutdown(skt);
clk_disable_unprepare(skt->clk);
}
@ -286,6 +287,21 @@ static int soc_common_pcmcia_config_skt(
ret = skt->ops->configure_socket(skt, state);
if (ret == 0) {
struct gpio_desc *descs[2];
int values[2], n = 0;
if (skt->gpio_reset) {
descs[n] = skt->gpio_reset;
values[n++] = !!(state->flags & SS_RESET);
}
if (skt->gpio_bus_enable) {
descs[n] = skt->gpio_bus_enable;
values[n++] = !!(state->flags & SS_OUTPUT_ENA);
}
if (n)
gpiod_set_array_value_cansleep(n, descs, values);
/*
* This really needs a better solution. The IRQ
* may or may not be claimed by the driver.

3
drivers/pcmcia/soc_common.h
View File

@ -62,6 +62,9 @@ struct soc_pcmcia_socket {
#define SOC_STAT_BVD2 2 /* BATWARN / IOSPKR */
#define SOC_STAT_RDY 3 /* Ready / Interrupt */
struct gpio_desc *gpio_reset;
struct gpio_desc *gpio_bus_enable;
unsigned int irq_state;
struct timer_list poll_timer;