ARM: AM43xx: GP_EVM: Add support for DDR3
GP EVM has 1GB DDR3 attached(Part no: MT41K512M8RH).
Adding details for the same.
Below is the brief description of DDR3 init sequence(SW leveling):
-> Enable VTT regulator
-> Configure VTP
-> Configure DDR IO settings
-> Disable initialization and refreshes until EMIF registers are programmed.
-> Program Timing registers
-> Program leveling registers
-> Program PHY control and Temp alert and ZQ config registers.
-> Enable initialization and refreshes and configure SDRAM CONFIG register
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
diff --git a/arch/arm/include/asm/arch-am33xx/ddr_defs.h b/arch/arm/include/asm/arch-am33xx/ddr_defs.h
index 6af4b84..c1777df 100644
--- a/arch/arm/include/asm/arch-am33xx/ddr_defs.h
+++ b/arch/arm/include/asm/arch-am33xx/ddr_defs.h
@@ -136,6 +136,14 @@
#define LPDDR2_DATA2_IOCTRL_VALUE 0x20000294
#define LPDDR2_DATA3_IOCTRL_VALUE 0x20000294
+#define DDR3_ADDRCTRL_WD0_IOCTRL_VALUE 0x00000000
+#define DDR3_ADDRCTRL_WD1_IOCTRL_VALUE 0x00000000
+#define DDR3_ADDRCTRL_IOCTRL_VALUE 0x84
+#define DDR3_DATA0_IOCTRL_VALUE 0x84
+#define DDR3_DATA1_IOCTRL_VALUE 0x84
+#define DDR3_DATA2_IOCTRL_VALUE 0x84
+#define DDR3_DATA3_IOCTRL_VALUE 0x84
+
/**
* Configure DMM
*/
diff --git a/arch/arm/include/asm/arch-am33xx/gpio.h b/arch/arm/include/asm/arch-am33xx/gpio.h
index 13a047fd..a1ffd49 100644
--- a/arch/arm/include/asm/arch-am33xx/gpio.h
+++ b/arch/arm/include/asm/arch-am33xx/gpio.h
@@ -13,4 +13,16 @@
#define AM33XX_GPIO2_BASE 0x481AC000
#define AM33XX_GPIO3_BASE 0x481AE000
+#define GPIO_22 22
+
+/* GPIO CTRL register */
+#define GPIO_CTRL_DISABLEMODULE_SHIFT 0
+#define GPIO_CTRL_DISABLEMODULE_MASK (1 << 0)
+#define GPIO_CTRL_ENABLEMODULE GPIO_CTRL_DISABLEMODULE_MASK
+
+/* GPIO OUTPUT ENABLE register */
+#define GPIO_OE_ENABLE(x) (1 << x)
+
+/* GPIO SETDATAOUT register */
+#define GPIO_SETDATAOUT(x) (1 << x)
#endif /* _GPIO_AM33xx_H */