ARM: mxs/mx28evk: add flexcan devices
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
diff --git a/arch/arm/mach-mxs/mach-mx28evk.c b/arch/arm/mach-mxs/mach-mx28evk.c
index 987e3d5..8bb2217 100644
--- a/arch/arm/mach-mxs/mach-mx28evk.c
+++ b/arch/arm/mach-mxs/mach-mx28evk.c
@@ -28,6 +28,7 @@
#include "devices-mx28.h"
#include "gpio.h"
+#define MX28EVK_FLEXCAN_SWITCH MXS_GPIO_NR(2, 13)
#define MX28EVK_FEC_PHY_POWER MXS_GPIO_NR(2, 15)
#define MX28EVK_FEC_PHY_RESET MXS_GPIO_NR(4, 13)
@@ -69,6 +70,15 @@
MX28_PAD_SSP1_DATA3__GPIO_2_15 | MXS_PAD_CTRL,
/* phy reset line */
MX28_PAD_ENET0_RX_CLK__GPIO_4_13 | MXS_PAD_CTRL,
+
+ /* flexcan0 */
+ MX28_PAD_GPMI_RDY2__CAN0_TX,
+ MX28_PAD_GPMI_RDY3__CAN0_RX,
+ /* flexcan1 */
+ MX28_PAD_GPMI_CE2N__CAN1_TX,
+ MX28_PAD_GPMI_CE3N__CAN1_RX,
+ /* transceiver power control */
+ MX28_PAD_SSP1_CMD__GPIO_2_13,
};
/* fec */
@@ -152,8 +162,44 @@
return -ETIMEDOUT;
}
+/*
+ * MX28EVK_FLEXCAN_SWITCH is shared between both flexcan controllers
+ */
+static int flexcan0_en, flexcan1_en;
+
+static void mx28evk_flexcan_switch(void)
+{
+ if (flexcan0_en || flexcan1_en)
+ gpio_set_value(MX28EVK_FLEXCAN_SWITCH, 1);
+ else
+ gpio_set_value(MX28EVK_FLEXCAN_SWITCH, 0);
+}
+
+static void mx28evk_flexcan0_switch(int enable)
+{
+ flexcan0_en = enable;
+ mx28evk_flexcan_switch();
+}
+
+static void mx28evk_flexcan1_switch(int enable)
+{
+ flexcan1_en = enable;
+ mx28evk_flexcan_switch();
+}
+
+static const struct flexcan_platform_data
+ mx28evk_flexcan_pdata[] __initconst = {
+ {
+ .transceiver_switch = mx28evk_flexcan0_switch,
+ }, {
+ .transceiver_switch = mx28evk_flexcan1_switch,
+ }
+};
+
static void __init mx28evk_init(void)
{
+ int ret;
+
mxs_iomux_setup_multiple_pads(mx28evk_pads, ARRAY_SIZE(mx28evk_pads));
mx28_add_duart();
@@ -166,6 +212,15 @@
mx28evk_fec_reset();
mx28_add_fec(0, &mx28_fec_pdata[0]);
mx28_add_fec(1, &mx28_fec_pdata[1]);
+
+ ret = gpio_request_one(MX28EVK_FLEXCAN_SWITCH, GPIOF_DIR_OUT,
+ "flexcan-switch");
+ if (ret) {
+ pr_err("failed to request gpio flexcan-switch: %d\n", ret);
+ } else {
+ mx28_add_flexcan(0, &mx28evk_flexcan_pdata[0]);
+ mx28_add_flexcan(1, &mx28evk_flexcan_pdata[1]);
+ }
}
static void __init mx28evk_timer_init(void)