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mx5: Add i2c to Freescale MX51 Babbage HW
authorDinh Nguyen <Dinh.Nguyen@freescale.com>
Thu, 27 May 2010 15:45:04 +0000 (10:45 -0500)
committerSascha Hauer <s.hauer@pengutronix.de>
Mon, 26 Jul 2010 12:17:58 +0000 (14:17 +0200)
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>
arch/arm/mach-mx5/clock-mx51.c patch | blob | history
arch/arm/mach-mx5/devices.c patch | blob | history
arch/arm/mach-mx5/devices.h patch | blob | history
arch/arm/plat-mxc/include/mach/iomux-mx51.h patch | blob | history

diff --git a/arch/arm/mach-mx5/clock-mx51.c b/arch/arm/mach-mx5/clock-mx51.c
index d9f612d..fd24092 100644 (file)
--- 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 7130449..ede4fcb 100644 (file)
--- 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 c879ae7..a853933 100644 (file)
--- 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 ab0f95d..38961c6 100644 (file)
--- 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)
Domain: System / Uncategorized;