ARM: omap3: am3517-evm: Add device tree and DM support

With the device tree ported from Linux 4.13, this enables
Driver Model and Device Tree support for the am3517-evm

Signed-off-by: Adam Ford <aford173@gmail.com>
Tested-by: Derald D. Woods <woods.technical@gmail.com>

1 files changed, 47 insertions, 24 deletions

diff --git a/board/logicpd/am3517evm/am3517evm.c b/board/logicpd/am3517evm/am3517evm.c
index c18a5a3140..29f136a530 100644
--- a/board/logicpd/am3517evm/am3517evm.c
+++ b/board/logicpd/am3517evm/am3517evm.c
@@ -12,6 +12,8 @@
  */
 
 #include <common.h>
+#include <dm.h>
+#include <ns16550.h>
 #include <asm/io.h>
 #include <asm/omap_musb.h>
 #include <asm/arch/am35x_def.h>
@@ -34,6 +36,22 @@ DECLARE_GLOBAL_DATA_PTR;
 
 #define AM3517_IP_SW_RESET	0x48002598
 #define CPGMACSS_SW_RST		(1 << 1)
+#define PHY_GPIO		30
+
+/* This is only needed until SPL gets OF support */
+#ifdef CONFIG_SPL_BUILD
+static const struct ns16550_platdata am3517_serial = {
+	.base = OMAP34XX_UART3,
+	.reg_shift = 2,
+	.clock = V_NS16550_CLK,
+	.fcr = UART_FCR_DEFVAL,
+};
+
+U_BOOT_DEVICE(am3517_uart) = {
+	"ns16550_serial",
+	&am3517_serial
+};
+#endif
 
 /*
  * Routine: board_init
@@ -113,30 +131,35 @@ int misc_init_r(void)
 
 	am3517_evm_musb_init();
 
-	/* activate PHY reset */
-	gpio_direction_output(30, 0);
-	gpio_set_value(30, 0);
-
-	ctr  = 0;
-	do {
-		udelay(1000);
-		ctr++;
-	} while (ctr < 300);
-
-	/* deactivate PHY reset */
-	gpio_set_value(30, 1);
-
-	/* allow the PHY to stabilize and settle down */
-	ctr = 0;
-	do {
-		udelay(1000);
-		ctr++;
-	} while (ctr < 300);
-
-	/* ensure that the module is out of reset */
-	reset = readl(AM3517_IP_SW_RESET);
-	reset &= (~CPGMACSS_SW_RST);
-	writel(reset,AM3517_IP_SW_RESET);
+	if (gpio_request(PHY_GPIO, "gpio_30") == 0) {
+		/* activate PHY reset */
+		gpio_direction_output(PHY_GPIO, 0);
+		gpio_set_value(PHY_GPIO, 0);
+
+		ctr  = 0;
+		do {
+			udelay(1000);
+			ctr++;
+		} while (ctr < 300);
+
+		/* deactivate PHY reset */
+		gpio_set_value(PHY_GPIO, 1);
+
+		/* allow the PHY to stabilize and settle down */
+		ctr = 0;
+		do {
+			udelay(1000);
+			ctr++;
+		} while (ctr < 300);
+
+		/* ensure that the module is out of reset */
+		reset = readl(AM3517_IP_SW_RESET);
+		reset &= (~CPGMACSS_SW_RST);
+		writel(reset, AM3517_IP_SW_RESET);
+
+		/* Free requested GPIO */
+		gpio_free(PHY_GPIO);
+	}
 
 	return 0;
 }