mx5: Add i2c to Freescale MX51 Babbage HW

This patch adds I2C functionality to the Freescale MX51 Babbage HW.
The patch adds device structures, i2c board slave device defines,
IOMUX pin defines, and clocks.

Signed-off-by: Dinh Nguyen <Dinh.Nguyen@freescale.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

4 files changed, 84 insertions, 6 deletions

diff --git a/arch/arm/mach-mx5/clock-mx51.c b/arch/arm/mach-mx5/clock-mx51.c
index d9f612d3370e..fd24092154b5 100644
--- a/arch/arm/mach-mx5/clock-mx51.c
+++ b/arch/arm/mach-mx5/clock-mx51.c
@@ -798,6 +798,14 @@ DEFINE_CLOCK(gpt_clk, 0, MXC_CCM_CCGR2, MXC_CCM_CCGRx_CG9_OFFSET,
 DEFINE_CLOCK(gpt_ipg_clk, 0, MXC_CCM_CCGR2, MXC_CCM_CCGRx_CG10_OFFSET,
         NULL,  NULL, &ipg_clk, NULL);
 
+/* I2C */
+DEFINE_CLOCK(i2c1_clk, 0, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG9_OFFSET,
+        NULL, NULL, &ipg_clk, NULL);
+DEFINE_CLOCK(i2c2_clk, 1, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG10_OFFSET,
+        NULL, NULL, &ipg_clk, NULL);
+DEFINE_CLOCK(hsi2c_clk, 0, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG11_OFFSET,
+        NULL, NULL, &ipg_clk, NULL);
+
 /* FEC */
 DEFINE_CLOCK(fec_clk, 0, MXC_CCM_CCGR2, MXC_CCM_CCGRx_CG12_OFFSET,
         NULL,  NULL, &ipg_clk, NULL);
@@ -815,6 +823,9 @@ static struct clk_lookup lookups[] = {
         _REGISTER_CLOCK("imx-uart.2", NULL, uart3_clk)
         _REGISTER_CLOCK(NULL, "gpt", gpt_clk)
         _REGISTER_CLOCK("fec.0", NULL, fec_clk)
+        _REGISTER_CLOCK("imx-i2c.0", NULL, i2c1_clk)
+        _REGISTER_CLOCK("imx-i2c.1", NULL, i2c2_clk)
+        _REGISTER_CLOCK("imx-i2c.2", NULL, hsi2c_clk)
         _REGISTER_CLOCK("mxc-ehci.0", "usb", usboh3_clk)
         _REGISTER_CLOCK("mxc-ehci.0", "usb_ahb", ahb_clk)
         _REGISTER_CLOCK("mxc-ehci.1", "usb", usboh3_clk)
diff --git a/arch/arm/mach-mx5/devices.c b/arch/arm/mach-mx5/devices.c
index 7130449aacdc..ede4fcbc7e80 100644
--- a/arch/arm/mach-mx5/devices.c
+++ b/arch/arm/mach-mx5/devices.c
@@ -93,6 +93,64 @@ struct platform_device mxc_fec_device = {
         .resource = mxc_fec_resources,
 };
 
+static struct resource mxc_i2c0_resources[] = {
+        {
+                .start = MX51_I2C1_BASE_ADDR,
+                .end = MX51_I2C1_BASE_ADDR + SZ_4K - 1,
+                .flags = IORESOURCE_MEM,
+        }, {
+                .start = MX51_MXC_INT_I2C1,
+                .end = MX51_MXC_INT_I2C1,
+                .flags = IORESOURCE_IRQ,
+        },
+};
+
+struct platform_device mxc_i2c_device0 = {
+        .name = "imx-i2c",
+        .id = 0,
+        .num_resources = ARRAY_SIZE(mxc_i2c0_resources),
+        .resource = mxc_i2c0_resources,
+};
+
+static struct resource mxc_i2c1_resources[] = {
+        {
+                .start = MX51_I2C2_BASE_ADDR,
+                .end = MX51_I2C2_BASE_ADDR + SZ_4K - 1,
+                .flags = IORESOURCE_MEM,
+        }, {
+                .start = MX51_MXC_INT_I2C2,
+                .end = MX51_MXC_INT_I2C2,
+                .flags = IORESOURCE_IRQ,
+        },
+};
+
+struct platform_device mxc_i2c_device1 = {
+        .name = "imx-i2c",
+        .id = 1,
+        .num_resources = ARRAY_SIZE(mxc_i2c1_resources),
+        .resource = mxc_i2c1_resources,
+};
+
+static struct resource mxc_hsi2c_resources[] = {
+        {
+                .start = MX51_HSI2C_DMA_BASE_ADDR,
+                .end = MX51_HSI2C_DMA_BASE_ADDR + SZ_16K - 1,
+                .flags = IORESOURCE_MEM,
+        },
+        {
+                .start = MX51_MXC_INT_HS_I2C,
+                .end = MX51_MXC_INT_HS_I2C,
+                .flags = IORESOURCE_IRQ,
+        },
+};
+
+struct platform_device mxc_hsi2c_device = {
+        .name = "imx-i2c",
+        .id = 2,
+        .num_resources = ARRAY_SIZE(mxc_hsi2c_resources),
+        .resource = mxc_hsi2c_resources
+};
+
 static u64 usb_dma_mask = DMA_BIT_MASK(32);
 
 static struct resource usbotg_resources[] = {
diff --git a/arch/arm/mach-mx5/devices.h b/arch/arm/mach-mx5/devices.h
index c879ae71cd5b..a853933682e7 100644
--- a/arch/arm/mach-mx5/devices.h
+++ b/arch/arm/mach-mx5/devices.h
@@ -6,3 +6,6 @@ extern struct platform_device mxc_usbdr_host_device;
 extern struct platform_device mxc_usbh1_device;
 extern struct platform_device mxc_usbdr_udc_device;
 extern struct platform_device mxc_wdt;
+extern struct platform_device mxc_i2c_device0;
+extern struct platform_device mxc_i2c_device1;
+extern struct platform_device mxc_hsi2c_device;
diff --git a/arch/arm/plat-mxc/include/mach/iomux-mx51.h b/arch/arm/plat-mxc/include/mach/iomux-mx51.h
index ab0f95d953d0..38961c6a6f0d 100644
--- a/arch/arm/plat-mxc/include/mach/iomux-mx51.h
+++ b/arch/arm/plat-mxc/include/mach/iomux-mx51.h
@@ -38,6 +38,8 @@ typedef enum iomux_config {
                                 PAD_CTL_SRE_FAST)
 #define MX51_UART3_PAD_CTRL     (PAD_CTL_PKE | PAD_CTL_DSE_HIGH | \
                                 PAD_CTL_SRE_FAST)
+#define MX51_I2C_PAD_CTRL               (PAD_CTL_SRE_FAST | PAD_CTL_ODE | \
+                                PAD_CTL_DSE_HIGH | PAD_CTL_PUS_100K_UP | PAD_CTL_HYS)
 #define MX51_USBH1_PAD_CTRL     (PAD_CTL_SRE_FAST | PAD_CTL_DSE_HIGH | \
                                 PAD_CTL_PUS_100K_UP | PAD_CTL_PUE | \
                                 PAD_CTL_PKE | PAD_CTL_HYS)
@@ -57,10 +59,12 @@ typedef enum iomux_config {
 
 /*                                              PAD      MUX   ALT INPSE PATH PADCTRL */
 
-#define MX51_PAD_GPIO_2_0__EIM_D16      IOMUX_PAD(0x3f0, 0x05c, 1, 0x0,   0, NO_PAD_CTRL)
+#define MX51_PAD_EIM_D16__I2C1_SDA      IOMUX_PAD(0x3f0, 0x05c, IOMUX_CONFIG_ALT4 | IOMUX_CONFIG_SION, \
+                                        0x09b4, 0, MX51_I2C_PAD_CTRL)
 #define MX51_PAD_GPIO_2_1__EIM_D17      IOMUX_PAD(0x3f4, 0x060, 1, 0x0,   0, NO_PAD_CTRL)
 #define MX51_PAD_GPIO_2_2__EIM_D18      IOMUX_PAD(0x3f8, 0x064, 1, 0x0,   0, NO_PAD_CTRL)
-#define MX51_PAD_GPIO_2_3__EIM_D19      IOMUX_PAD(0x3fc, 0x068, 1, 0x0,   0, NO_PAD_CTRL)
+#define MX51_PAD_EIM_D19__I2C1_SCL      IOMUX_PAD(0x3fc, 0x068, IOMUX_CONFIG_ALT4 | IOMUX_CONFIG_SION, \
+                                        0x09b0, 0, MX51_I2C_PAD_CTRL)
 #define MX51_PAD_GPIO_2_4__EIM_D20      IOMUX_PAD(0x400, 0x06c, 1, 0x0,   0, NO_PAD_CTRL)
 #define MX51_PAD_GPIO_2_5__EIM_D21      IOMUX_PAD(0x404, 0x070, 1, 0x0,   0, NO_PAD_CTRL)
 #define MX51_PAD_EIM_D21__GPIO_2_5      IOMUX_PAD(0x404, 0x070, IOMUX_CONFIG_ALT1, 0x0,   0, MX51_GPIO_PAD_CTRL)
@@ -179,8 +183,8 @@ typedef enum iomux_config {
 #define MX51_PAD_GPIO_4_14__CSI2_HSYNC  IOMUX_PAD(0x5E0, 0x1F0, 3, 0x0, 0, NO_PAD_CTRL)
 #define MX51_PAD_GPIO_4_15__CSI2_PIXCLK IOMUX_PAD(0x5E4, 0x1F4, 3, 0x0, 0, NO_PAD_CTRL)
 #define MX51_PAD_CSI2_PKE0__CSI2_PKE0   IOMUX_PAD(0x81C, 0x0, 0, 0x0, 0, NO_PAD_CTRL)
-#define MX51_PAD_GPIO_4_16__I2C1_CLK    IOMUX_PAD(0x5E8, 0x1F8, 3, 0x0, 0, NO_PAD_CTRL)
-#define MX51_PAD_GPIO_4_17__I2C1_DAT    IOMUX_PAD(0x5EC, 0x1FC, 3, 0x0, 0, NO_PAD_CTRL)
+#define MX51_PAD_I2C1_CLK__HSI2C_CLK    IOMUX_PAD(0x5E8, 0x1F8, IOMUX_CONFIG_ALT0, 0x0, 0, NO_PAD_CTRL)
+#define MX51_PAD_I2C1_DAT__HSI2C_DAT    IOMUX_PAD(0x5EC, 0x1FC, IOMUX_CONFIG_ALT0, 0x0, 0, NO_PAD_CTRL)
 #define MX51_PAD_GPIO_4_18__AUD3_BB_TXD IOMUX_PAD(0x5F0, 0x200, 3, 0x0, 0, NO_PAD_CTRL)
 #define MX51_PAD_GPIO_4_19__AUD3_BB_RXD IOMUX_PAD(0x5F4, 0x204, 3, 0x0, 0, NO_PAD_CTRL)
 #define MX51_PAD_GPIO_4_20__AUD3_BB_CK  IOMUX_PAD(0x5F8, 0x208, 3, 0x0, 0, NO_PAD_CTRL)
@@ -213,8 +217,10 @@ typedef enum iomux_config {
 #define MX51_PAD_KEY_COL1__KEY_COL1     IOMUX_PAD(0x650, 0x260, 0, 0x0, 0, NO_PAD_CTRL)
 #define MX51_PAD_KEY_COL2__KEY_COL2     IOMUX_PAD(0x654, 0x264, 0, 0x0, 0, NO_PAD_CTRL)
 #define MX51_PAD_KEY_COL3__KEY_COL3     IOMUX_PAD(0x658, 0x268, 0, 0x0, 0, NO_PAD_CTRL)
-#define MX51_PAD_KEY_COL4__KEY_COL4     IOMUX_PAD(0x65C, 0x26C, 0, 0x0, 0, NO_PAD_CTRL)
-#define MX51_PAD_KEY_COL5__KEY_COL5     IOMUX_PAD(0x660, 0x270, 0, 0x0, 0, NO_PAD_CTRL)
+#define MX51_PAD_KEY_COL4__I2C2_SCL     IOMUX_PAD(0x65C, 0x26C, IOMUX_CONFIG_ALT3 | IOMUX_CONFIG_SION, \
+                                        0x09b8, 1, MX51_I2C_PAD_CTRL)
+#define MX51_PAD_KEY_COL5__I2C2_SDA     IOMUX_PAD(0x660, 0x270, IOMUX_CONFIG_ALT3 | IOMUX_CONFIG_SION, \
+                                        0x09bc, 1, MX51_I2C_PAD_CTRL)
 #define MX51_PAD_USBH1_CLK__USBH1_CLK   IOMUX_PAD(0x678, 0x278, IOMUX_CONFIG_ALT0, 0x0, 0, MX51_USBH1_PAD_CTRL)
 #define MX51_PAD_USBH1_DIR__USBH1_DIR   IOMUX_PAD(0x67C, 0x27C, IOMUX_CONFIG_ALT0, 0x0, 0, MX51_USBH1_PAD_CTRL)
 #define MX51_PAD_USBH1_STP__USBH1_STP   IOMUX_PAD(0x680, 0x280, IOMUX_CONFIG_ALT0, 0x0, 0, MX51_USBH1_PAD_CTRL)