regulator: add bcm2835 driver

this will allow to handle IP power automatically and not at board level

Mainline kernel need this as they do not have the regulator driver support

as some IP such as USB are not power on at boot

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 49 insertions, 0 deletions

diff --git a/arch/arm/mach-bcm2835/include/mach/mbox.h b/arch/arm/mach-bcm2835/include/mach/mbox.h
index e5f6bfa3e0..d991ba7253 100644
--- a/arch/arm/mach-bcm2835/include/mach/mbox.h
+++ b/arch/arm/mach-bcm2835/include/mach/mbox.h
@@ -172,6 +172,55 @@ struct bcm2835_mbox_tag_get_arm_mem {
 	} body;
 };
 
+#define BCM2835_MBOX_POWER_DEVID_SDHCI		0
+#define BCM2835_MBOX_POWER_DEVID_UART0		1
+#define BCM2835_MBOX_POWER_DEVID_UART1		2
+#define BCM2835_MBOX_POWER_DEVID_USB_HCD	3
+#define BCM2835_MBOX_POWER_DEVID_I2C0		4
+#define BCM2835_MBOX_POWER_DEVID_I2C1		5
+#define BCM2835_MBOX_POWER_DEVID_I2C2		6
+#define BCM2835_MBOX_POWER_DEVID_SPI		7
+#define BCM2835_MBOX_POWER_DEVID_CCP2TX		8
+
+#define BCM2835_MBOX_POWER_STATE_RESP_ON	(1 << 0)
+/* Device doesn't exist */
+#define BCM2835_MBOX_POWER_STATE_RESP_NODEV	(1 << 1)
+
+#define BCM2835_MBOX_TAG_GET_POWER_STATE	0x00020001
+
+struct bcm2835_mbox_tag_get_power_state {
+	struct bcm2835_mbox_tag_hdr tag_hdr;
+	union {
+		struct {
+			u32 device_id;
+		} req;
+		struct {
+			u32 device_id;
+			u32 state;
+		} resp;
+	} body;
+};
+
+#define BCM2835_MBOX_TAG_SET_POWER_STATE	0x00028001
+
+#define BCM2835_MBOX_SET_POWER_STATE_REQ_OFF	(0 << 0)
+#define BCM2835_MBOX_SET_POWER_STATE_REQ_ON	(1 << 0)
+#define BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT	(1 << 1)
+
+struct bcm2835_mbox_tag_set_power_state {
+	struct bcm2835_mbox_tag_hdr tag_hdr;
+	union {
+		struct {
+			u32 device_id;
+			u32 state;
+		} req;
+		struct {
+			u32 device_id;
+			u32 state;
+		} resp;
+	} body;
+};
+
 #define BCM2835_MBOX_TAG_GET_CLOCK_RATE	0x00030002
 
 #define BCM2835_MBOX_CLOCK_ID_EMMC	1