[PATCH 12/33] pcmcia: soc_common: add support for reset and bus enable GPIOs

[Russell King]

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+ker...@armlinux.org.uk>
---
 drivers/pcmcia/soc_common.c | 20 ++++++++++++++++++++
 drivers/pcmcia/soc_common.h |  3 +++
 2 files changed, 23 insertions(+)

diff --git a/drivers/pcmcia/soc_common.c b/drivers/pcmcia/soc_common.c
index edfb6045fcda..822de207c408 100644
--- a/drivers/pcmcia/soc_common.c
+++ b/drivers/pcmcia/soc_common.c
@@ -122,6 +122,11 @@ static void __soc_pcmcia_hw_shutdown(struct 
soc_pcmcia_socket *skt,
        if (skt->ops->hw_shutdown)
                skt->ops->hw_shutdown(skt);
 
+       if (skt->gpio_reset)
+               gpiod_put(skt->gpio_reset);
+       if (skt->gpio_bus_enable)
+               gpiod_put(skt->gpio_bus_enable);
+
        clk_disable_unprepare(skt->clk);
 }
 
@@ -288,6 +293,21 @@ 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.
diff --git a/drivers/pcmcia/soc_common.h b/drivers/pcmcia/soc_common.h
index ee40db16dc40..686ba3238c76 100644
--- a/drivers/pcmcia/soc_common.h
+++ b/drivers/pcmcia/soc_common.h
@@ -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;
-- 
2.1.0


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