From: Tom Rini <trini@konsulko.com>
Date: Tue, 28 Jul 2020 01:40:26 +0000 (-0400)
Subject: Merge tag 'u-boot-amlogic-20200727' of https://gitlab.denx.de/u-boot/custodians/u... 
X-Git-Tag: v2020.10~95
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6b7937821dfdd53a7a733b3f723de1d84500247d;hp=8d1fc6fb89826efb6bbbedb57862496e18737877;p=platform%2Fkernel%2Fu-boot.git

Merge tag 'u-boot-amlogic-20200727' of https://gitlab.denx.de/u-boot/custodians/u-boot-amlogic

- Handle errors in Meson serial driver
- Enable HDMI, keyboard and ADC for Odroid-C2
---

diff --git a/configs/odroid-c2_defconfig b/configs/odroid-c2_defconfig
index f62e83a..c80719a 100644
--- a/configs/odroid-c2_defconfig
+++ b/configs/odroid-c2_defconfig
@@ -15,6 +15,7 @@ CONFIG_MISC_INIT_R=y
 # CONFIG_DISPLAY_CPUINFO is not set
 # CONFIG_CMD_BDI is not set
 # CONFIG_CMD_IMI is not set
+CONFIG_CMD_ADC=y
 CONFIG_CMD_GPIO=y
 CONFIG_CMD_I2C=y
 # CONFIG_CMD_LOADS is not set
@@ -26,6 +27,7 @@ CONFIG_OF_CONTROL=y
 CONFIG_DEFAULT_DEVICE_TREE="meson-gxbb-odroidc2"
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_NET_RANDOM_ETHADDR=y
+CONFIG_SARADC_MESON=y
 CONFIG_DM_I2C=y
 CONFIG_SYS_I2C_MESON=y
 CONFIG_DM_MMC=y
@@ -38,6 +40,8 @@ CONFIG_MESON_GXBB_USB_PHY=y
 CONFIG_PINCTRL=y
 CONFIG_PINCTRL_MESON_GXBB=y
 CONFIG_DM_REGULATOR=y
+CONFIG_POWER_DOMAIN=y
+CONFIG_MESON_GX_VPU_POWER_DOMAIN=y
 CONFIG_DM_REGULATOR_FIXED=y
 CONFIG_DM_REGULATOR_GPIO=y
 CONFIG_DM_RESET=y
@@ -47,5 +51,12 @@ CONFIG_MESON_SERIAL=y
 CONFIG_USB=y
 CONFIG_DM_USB=y
 CONFIG_USB_DWC2=y
+CONFIG_USB_KEYBOARD=y
+CONFIG_DM_VIDEO=y
+# CONFIG_VIDEO_BPP8 is not set
+# CONFIG_VIDEO_BPP16 is not set
+CONFIG_SYS_WHITE_ON_BLACK=y
+CONFIG_VIDEO_MESON=y
+CONFIG_VIDEO_DT_SIMPLEFB=y
 CONFIG_OF_LIBFDT_OVERLAY=y
 CONFIG_SMBIOS_MANUFACTURER="Hardkernel Co., Ltd."
diff --git a/drivers/serial/serial_meson.c b/drivers/serial/serial_meson.c
index 8cf849f..496a2ca 100644
--- a/drivers/serial/serial_meson.c
+++ b/drivers/serial/serial_meson.c
@@ -65,14 +65,36 @@ static int meson_serial_probe(struct udevice *dev)
 	return 0;
 }
 
+static void meson_serial_rx_error(struct udevice *dev)
+{
+	struct meson_serial_platdata *plat = dev->platdata;
+	struct meson_uart *const uart = plat->reg;
+	u32 val = readl(&uart->control);
+
+	/* Clear error */
+	val |= AML_UART_CLR_ERR;
+	writel(val, &uart->control);
+	val &= ~AML_UART_CLR_ERR;
+	writel(val, &uart->control);
+
+	/* Remove spurious byte from fifo */
+	readl(&uart->rfifo);
+}
+
 static int meson_serial_getc(struct udevice *dev)
 {
 	struct meson_serial_platdata *plat = dev->platdata;
 	struct meson_uart *const uart = plat->reg;
+	uint32_t status = readl(&uart->status);
 
-	if (readl(&uart->status) & AML_UART_RX_EMPTY)
+	if (status & AML_UART_RX_EMPTY)
 		return -EAGAIN;
 
+	if (status & AML_UART_ERR) {
+		meson_serial_rx_error(dev);
+		return -EIO;
+	}
+
 	return readl(&uart->rfifo) & 0xff;
 }
 
@@ -95,10 +117,23 @@ static int meson_serial_pending(struct udevice *dev, bool input)
 	struct meson_uart *const uart = plat->reg;
 	uint32_t status = readl(&uart->status);
 
-	if (input)
-		return !(status & AML_UART_RX_EMPTY);
-	else
+	if (input) {
+		if (status & AML_UART_RX_EMPTY)
+			return false;
+
+		/*
+		 * Handle and drop any RX error here to avoid
+		 * returning true here when an error byte is in the FIFO
+		 */
+		if (status & AML_UART_ERR) {
+			meson_serial_rx_error(dev);
+			return false;
+		}
+
+		return true;
+	} else {
 		return !(status & AML_UART_TX_FULL);
+	}
 }
 
 static int meson_serial_ofdata_to_platdata(struct udevice *dev)