pcmcia: soc_common: add support for Vcc and Vpp regulators

Add support for handling supply regulators in the soc_common code.  This
allows us to separate out the board specifics for setting voltages from
the PCMCIA code.

We detect when setting a voltage fails, and report this fact - some
platforms have fixed-voltage supplies (eg, for CF sockets at 3.3V) and
we need to ignore attempts to configure for 5V, as per the existing
board specific drivers.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/pcmcia/soc_common.h b/drivers/pcmcia/soc_common.h
index 39c1e15167f3..18a6df5ca374 100644
--- a/drivers/pcmcia/soc_common.h
+++ b/drivers/pcmcia/soc_common.h
@@ -19,6 +19,12 @@
 struct device;
 struct gpio_desc;
 struct pcmcia_low_level;
+struct regulator;
+
+struct soc_pcmcia_regulator {
+	struct regulator	*reg;
+	bool			on;
+};
 
 /*
  * This structure encapsulates per-socket state which we might need to
@@ -64,6 +70,8 @@ struct soc_pcmcia_socket {
 
 	struct gpio_desc	*gpio_reset;
 	struct gpio_desc	*gpio_bus_enable;
+	struct soc_pcmcia_regulator vcc;
+	struct soc_pcmcia_regulator vpp;
 
 	unsigned int		irq_state;
 
@@ -146,6 +154,9 @@ int soc_pcmcia_request_gpiods(struct soc_pcmcia_socket *skt);
 void soc_common_cf_socket_state(struct soc_pcmcia_socket *skt,
 	struct pcmcia_state *state);
 
+int soc_pcmcia_regulator_set(struct soc_pcmcia_socket *skt,
+	struct soc_pcmcia_regulator *r, int v);
+
 #ifdef CONFIG_PCMCIA_DEBUG
 
 extern void soc_pcmcia_debug(struct soc_pcmcia_socket *skt, const char *func,