[U-Boot] [RFC PATCH 13/14] dm: tegra: Enable driver model in SPL and adjust the GPIO driver

[Simon Glass]

Use the full driver model GPIO and serial drivers in SPL now that these are
supported. Since device tree is not available they will use platform data.

Remove the special SPL GPIO function as it is no longer needed.

This is all in one commit to maintain bisectability.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

 board/nvidia/seaboard/seaboard.c |  4 +---
 drivers/gpio/Makefile            |  4 ++++
 drivers/gpio/tegra_gpio.c        | 27 +++++++++++----------------
 include/configs/tegra-common.h   | 12 +++---------
 4 files changed, 19 insertions(+), 28 deletions(-)

diff --git a/board/nvidia/seaboard/seaboard.c b/board/nvidia/seaboard/seaboard.c
index 6a243f0..3e52826 100644
--- a/board/nvidia/seaboard/seaboard.c
+++ b/board/nvidia/seaboard/seaboard.c
@@ -19,10 +19,8 @@
 void gpio_early_init_uart(void)
 {
 	/* Enable UART via GPIO_PI3 (port 8, bit 3) so serial console works */
-#ifndef CONFIG_SPL_BUILD
 	gpio_request(GPIO_PI3, NULL);
-#endif
-	tegra_spl_gpio_direction_output(GPIO_PI3, 0);
+	gpio_direction_output(GPIO_PI3, 0);
 }
 #endif
 
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index aa11f15..fe9a3b2 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -8,6 +8,10 @@
 ifndef CONFIG_SPL_BUILD
 obj-$(CONFIG_DM_GPIO)		+= gpio-uclass.o
 endif
+/* TODO(sjg at chromium.org): Only tegra supports driver model in SPL */
+ifdef CONFIG_TEGRA_GPIO
+obj-$(CONFIG_DM_GPIO)		+= gpio-uclass.o
+endif
 
 obj-$(CONFIG_AT91_GPIO)	+= at91_gpio.o
 obj-$(CONFIG_INTEL_ICH6_GPIO)	+= intel_ich6_gpio.o
diff --git a/drivers/gpio/tegra_gpio.c b/drivers/gpio/tegra_gpio.c
index 39852b2..d8e9191 100644
--- a/drivers/gpio/tegra_gpio.c
+++ b/drivers/gpio/tegra_gpio.c
@@ -169,21 +169,6 @@ static int check_reserved(struct udevice *dev, unsigned offset,
 	return 0;
 }
 
-/* set GPIO pin 'gpio' as an output, with polarity 'value' */
-int tegra_spl_gpio_direction_output(int gpio, int value)
-{
-	/* Configure as a GPIO */
-	set_config(gpio, 1);
-
-	/* Configure GPIO output value. */
-	set_level(gpio, value);
-
-	/* Configure GPIO direction as output. */
-	set_direction(gpio, 1);
-
-	return 0;
-}
-
 /*
  * Generic_GPIO primitives.
  */
@@ -460,12 +445,19 @@ static int gpio_tegra_bind(struct udevice *parent)
 	int bank_count;
 	int bank;
 	int ret;
-	int len;
 
 	/* If this is a child device, there is nothing to do here */
 	if (plat)
 		return 0;
 
+	/* TODO(sjg at chromium.org): Remove once SPL supports device tree */
+#ifdef CONFIG_SPL_BUILD
+	ctlr = (struct gpio_ctlr *)NV_PA_GPIO_BASE;
+	bank_count = TEGRA_GPIO_BANKS;
+#else
+	{
+	int len;
+
 	/*
 	 * This driver does not make use of interrupts, other than to figure
 	 * out the number of GPIO banks
@@ -475,6 +467,8 @@ static int gpio_tegra_bind(struct udevice *parent)
 	bank_count = len / 3 / sizeof(u32);
 	ctlr = (struct gpio_ctlr *)fdtdec_get_addr(gd->fdt_blob,
 						   parent->of_offset, "reg");
+	}
+#endif
 	for (bank = 0; bank < bank_count; bank++) {
 		int port;
 
@@ -510,4 +504,5 @@ U_BOOT_DRIVER(gpio_tegra) = {
 	.probe = gpio_tegra_probe,
 	.priv_auto_alloc_size = sizeof(struct tegra_port_info),
 	.ops	= &gpio_tegra_ops,
+	.flags	= DM_FLAG_PRE_RELOC,
 };
diff --git a/include/configs/tegra-common.h b/include/configs/tegra-common.h
index 834b3d5..a41c715 100644
--- a/include/configs/tegra-common.h
+++ b/include/configs/tegra-common.h
@@ -19,11 +19,10 @@
 #include <asm/arch/tegra.h>		/* get chip and board defs */
 
 #define CONFIG_DM
+#define CONFIG_SPL_DM
 #define CONFIG_CMD_DM
-#define CONFIG_DM_GPIO
-#ifndef CONFIG_SPL_BUILD
 #define CONFIG_DM_SERIAL
-#endif
+#define CONFIG_DM_GPIO
 
 #define CONFIG_SYS_TIMER_RATE		1000000
 #define CONFIG_SYS_TIMER_COUNTER	NV_PA_TMRUS_BASE
@@ -49,13 +48,7 @@
 /*
  * NS16550 Configuration
  */
-#ifdef CONFIG_SPL_BUILD
-#define CONFIG_SYS_NS16550_SERIAL
-#define CONFIG_SYS_NS16550_REG_SIZE	(-4)
-#define CONFIG_SYS_NS16550_CLK		V_NS16550_CLK
-#else
 #define CONFIG_TEGRA_SERIAL
-#endif
 #define CONFIG_SYS_NS16550
 
 /*
@@ -135,6 +128,7 @@
 						GENERATED_GBL_DATA_SIZE)
 
 #define CONFIG_TEGRA_GPIO
+
 #define CONFIG_CMD_GPIO
 #define CONFIG_CMD_ENTERRCM
 
-- 
2.1.0.rc2.206.gedb03e5