[ARM] Orion: rework MPP handling

Instead of having board code poke directly into the MPP configuration
registers, and separately calling orion5x_gpio_set_valid_pins() to
indicate which MPP pins can be used as GPIO pins, introduce a helper
function for configuring the roles of each of the MPP pins, and have
that helper function handle gpio validity internally.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Acked-by: Sylver Bruneau <sylver.bruneau@googlemail.com>
Acked-by: Russell King <linux@arm.linux.org.uk>

1 files changed, 74 insertions, 0 deletions

diff --git a/arch/arm/mach-orion5x/mpp.h b/arch/arm/mach-orion5x/mpp.h
new file mode 100644
index 000000000000..290e610dc012
--- /dev/null
+++ b/arch/arm/mach-orion5x/mpp.h
@@ -0,0 +1,74 @@
+#ifndef __ARCH_ORION5X_MPP_H
+#define __ARCH_ORION5X_MPP_H
+
+enum orion5x_mpp_type {
+        /*
+         * This MPP is unused.
+         */
+        MPP_UNUSED,
+
+        /*
+         * This MPP pin is used as a generic GPIO pin.  Valid for
+         * MPPs 0-15 and device bus data pins 16-31.  On 5182, also
+         * valid for MPPs 16-19.
+         */
+        MPP_GPIO,
+
+        /*
+         * This MPP is used as PCIe_RST_OUTn pin.  Valid for
+         * MPP 0 only.
+         */
+        MPP_PCIE_RST_OUTn,
+
+        /*
+         * This MPP is used as PCI arbiter pin (REQn/GNTn).
+         * Valid for MPPs 0-7 only.
+         */
+        MPP_PCI_ARB,
+
+        /*
+         * This MPP is used as PCI_PMEn pin.  Valid for MPP 2 only.
+         */
+        MPP_PCI_PMEn,
+
+        /*
+         * This MPP is used as GigE half-duplex (COL, CRS) or GMII
+         * (RXERR, CRS, TXERR, TXD[7:4], RXD[7:4]) pin.  Valid for
+         * MPPs 8-19 only.
+         */
+        MPP_GIGE,
+
+        /*
+         * This MPP is used as NAND REn/WEn pin.  Valid for MPPs
+         * 4-7 and 12-17 only, and only on the 5181l/5182/5281.
+         */
+        MPP_NAND,
+
+        /*
+         * This MPP is used as a PCI clock output pin.  Valid for
+         * MPPs 6-7 only, and only on the 5181l.
+         */
+        MPP_PCI_CLK,
+
+        /*
+         * This MPP is used as a SATA presence/activity LED.
+         * Valid for MPPs 4-7 and 12-15 only, and only on the 5182.
+         */
+        MPP_SATA_LED,
+
+        /*
+         * This MPP is used as UART1 RXD/TXD/CTSn/RTSn pin.
+         * Valid for MPPs 16-19 only.
+         */
+        MPP_UART,
+};
+
+struct orion5x_mpp_mode {
+        int                     mpp;
+        enum orion5x_mpp_type   type;
+};
+
+void orion5x_mpp_conf(struct orion5x_mpp_mode *mode);
+
+
+#endif