rockchip: Add I2C driver
Add an I2C driver for the Rockchip RK3288, using driver model. It should work
for other Rockchip SoCs also.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/include/asm/arch-rockchip/i2c.h b/arch/arm/include/asm/arch-rockchip/i2c.h
new file mode 100644
index 0000000..d81f8ff
--- /dev/null
+++ b/arch/arm/include/asm/arch-rockchip/i2c.h
@@ -0,0 +1,70 @@
+/*
+ * (C) Copyright 2012 SAMSUNG Electronics
+ * Jaehoon Chung <jh80.chung@samsung.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __ASM_ARCH_I2C_H
+#define __ASM_ARCH_I2C_H
+
+struct i2c_regs {
+ u32 con;
+ u32 clkdiv;
+ u32 mrxaddr;
+ u32 mrxraddr;
+ u32 mtxcnt;
+ u32 mrxcnt;
+ u32 ien;
+ u32 ipd;
+ u32 fcnt;
+ u32 reserved0[0x37];
+ u32 txdata[8];
+ u32 reserved1[0x38];
+ u32 rxdata[8];
+};
+
+/* Control register */
+#define I2C_CON_EN (1 << 0)
+#define I2C_CON_MOD(mod) ((mod) << 1)
+#define I2C_MODE_TX 0x00
+#define I2C_MODE_TRX 0x01
+#define I2C_MODE_RX 0x02
+#define I2C_MODE_RRX 0x03
+#define I2C_CON_MASK (3 << 1)
+
+#define I2C_CON_START (1 << 3)
+#define I2C_CON_STOP (1 << 4)
+#define I2C_CON_LASTACK (1 << 5)
+#define I2C_CON_ACTACK (1 << 6)
+
+/* Clock dividor register */
+#define I2C_CLKDIV_VAL(divl, divh) \
+ (((divl) & 0xffff) | (((divh) << 16) & 0xffff0000))
+
+/* the slave address accessed for master rx mode */
+#define I2C_MRXADDR_SET(vld, addr) (((vld) << 24) | (addr))
+
+/* the slave register address accessed for master rx mode */
+#define I2C_MRXRADDR_SET(vld, raddr) (((vld) << 24) | (raddr))
+
+/* interrupt enable register */
+#define I2C_BTFIEN (1 << 0)
+#define I2C_BRFIEN (1 << 1)
+#define I2C_MBTFIEN (1 << 2)
+#define I2C_MBRFIEN (1 << 3)
+#define I2C_STARTIEN (1 << 4)
+#define I2C_STOPIEN (1 << 5)
+#define I2C_NAKRCVIEN (1 << 6)
+
+/* interrupt pending register */
+#define I2C_BTFIPD (1 << 0)
+#define I2C_BRFIPD (1 << 1)
+#define I2C_MBTFIPD (1 << 2)
+#define I2C_MBRFIPD (1 << 3)
+#define I2C_STARTIPD (1 << 4)
+#define I2C_STOPIPD (1 << 5)
+#define I2C_NAKRCVIPD (1 << 6)
+#define I2C_IPD_ALL_CLEAN 0x7f
+
+#endif