MIPS: Netlogic: XLP2xx update for I2C controller

XLP2xx has a new I2C controller which has 4 buses connected to
it. Update the IO offset and IRQ mapping code to reflect this.

Signed-off-by: Ganesan Ramalingam <ganesanr@broadcom.com>
Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5707/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/include/asm/netlogic/xlp-hal/iomap.h

@@ -88,6 +88,9 @@
 #define XLP_IO_I2C0_OFFSET(node)	XLP_HDR_OFFSET(node, 0, 6, 2)
 #define XLP_IO_I2C1_OFFSET(node)	XLP_HDR_OFFSET(node, 0, 6, 3)
 #define XLP_IO_GPIO_OFFSET(node)	XLP_HDR_OFFSET(node, 0, 6, 4)
+/* on 2XX, all I2C busses are on the same block */
+#define XLP2XX_IO_I2C_OFFSET(node)	XLP_HDR_OFFSET(node, 0, 6, 7)
+
 /* system management */
 #define XLP_IO_SYS_OFFSET(node)		XLP_HDR_OFFSET(node, 0, 6, 5)
 #define XLP_IO_JTAG_OFFSET(node)	XLP_HDR_OFFSET(node, 0, 6, 6)

arch/mips/include/asm/netlogic/xlp-hal/xlp.h

@@ -50,6 +50,8 @@
 #define PIC_MMC_IRQ			29
 #define PIC_I2C_0_IRQ			30
 #define PIC_I2C_1_IRQ			31
+#define PIC_I2C_2_IRQ			32
+#define PIC_I2C_3_IRQ			33
 
 #ifndef __ASSEMBLY__
 

arch/mips/netlogic/xlp/nlm_hal.c

@@ -93,11 +93,14 @@ int nlm_irq_to_irt(int irq)
 	case PIC_MMC_IRQ:
 		devoff = XLP_IO_SD_OFFSET(0);
 		break;
-	case PIC_I2C_0_IRQ:
-		devoff = XLP_IO_I2C0_OFFSET(0);
-		break;
+	case PIC_I2C_0_IRQ:	/* I2C will be fixed up */
 	case PIC_I2C_1_IRQ:
-		devoff = XLP_IO_I2C1_OFFSET(0);
+	case PIC_I2C_2_IRQ:
+	case PIC_I2C_3_IRQ:
+		if (cpu_is_xlpii())
+			devoff = XLP2XX_IO_I2C_OFFSET(0);
+		else
+			devoff = XLP_IO_I2C0_OFFSET(0);
 		break;
 	default:
 		devoff = 0;
@@ -107,9 +110,15 @@ int nlm_irq_to_irt(int irq)
 	if (devoff != 0) {
 		pcibase = nlm_pcicfg_base(devoff);
 		irt = nlm_read_reg(pcibase, XLP_PCI_IRTINFO_REG) & 0xffff;
-		/* HW bug, I2C 1 irt entry is off by one */
-		if (irq == PIC_I2C_1_IRQ)
-			irt = irt + 1;
+		/* HW weirdness, I2C IRT entry has to be fixed up */
+		switch (irq) {
+		case PIC_I2C_1_IRQ:
+			irt = irt + 1; break;
+		case PIC_I2C_2_IRQ:
+			irt = irt + 2; break;
+		case PIC_I2C_3_IRQ:
+			irt = irt + 3; break;
+		}
 	} else if (irq >= PIC_PCIE_LINK_0_IRQ && irq <= PIC_PCIE_LINK_3_IRQ) {
 		/* HW bug, PCI IRT entries are bad on early silicon, fix */
 		irt = PIC_IRT_PCIE_LINK_INDEX(irq - PIC_PCIE_LINK_0_IRQ);