[U-Boot] [PATCH 03/14] imx: ventana: remove setup of I2C3 from SPL

Tim Harvey
2019-02-04T21:10:49Z

Do not setup I2C3 in the SPL for Ventana as some devices on that bus
(aic3x codecs) can hang the bus causing i2c_setup to spin endlessly until
they are put into reset. Removing the setup of I2C3 from the SPL allows
the board-specific GPIO to be configured to take care of putting codecs
in reset prior to U-Boot setting up I2C3.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
---
board/gateworks/gw_ventana/common.c | 165 ++++++++++----------
board/gateworks/gw_ventana/common.h | 2 +-
board/gateworks/gw_ventana/gw_ventana.c | 4 +-
board/gateworks/gw_ventana/gw_ventana_spl.c | 5 +-
4 files changed, 90 insertions(+), 86 deletions(-)

diff --git a/board/gateworks/gw_ventana/common.c b/board/gateworks/gw_ventana/common.c
index f577bdbdfb..676a1a8f42 100644
--- a/board/gateworks/gw_ventana/common.c
+++ b/board/gateworks/gw_ventana/common.c
@@ -78,95 +78,96 @@ static iomux_v3_cfg_t const usdhc3_pads[] = {
IOMUX_PADS(PAD_SD3_DAT5__GPIO7_IO00 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
};

-/* I2C1: GSC */
-static struct i2c_pads_info mx6q_i2c_pad_info0 = {
- .scl = {
- .i2c_mode = MX6Q_PAD_EIM_D21__I2C1_SCL | PC,
- .gpio_mode = MX6Q_PAD_EIM_D21__GPIO3_IO21 | PC,
- .gp = IMX_GPIO_NR(3, 21)
- },
- .sda = {
- .i2c_mode = MX6Q_PAD_EIM_D28__I2C1_SDA | PC,
- .gpio_mode = MX6Q_PAD_EIM_D28__GPIO3_IO28 | PC,
- .gp = IMX_GPIO_NR(3, 28)
- }
-};
-static struct i2c_pads_info mx6dl_i2c_pad_info0 = {
- .scl = {
- .i2c_mode = MX6DL_PAD_EIM_D21__I2C1_SCL | PC,
- .gpio_mode = MX6DL_PAD_EIM_D21__GPIO3_IO21 | PC,
- .gp = IMX_GPIO_NR(3, 21)
- },
- .sda = {
- .i2c_mode = MX6DL_PAD_EIM_D28__I2C1_SDA | PC,
- .gpio_mode = MX6DL_PAD_EIM_D28__GPIO3_IO28 | PC,
- .gp = IMX_GPIO_NR(3, 28)
- }
-};
-
-/* I2C2: PMIC/PCIe Switch/PCIe Clock/Mezz */
-static struct i2c_pads_info mx6q_i2c_pad_info1 = {
- .scl = {
- .i2c_mode = MX6Q_PAD_KEY_COL3__I2C2_SCL | PC,
- .gpio_mode = MX6Q_PAD_KEY_COL3__GPIO4_IO12 | PC,
- .gp = IMX_GPIO_NR(4, 12)
- },
- .sda = {
- .i2c_mode = MX6Q_PAD_KEY_ROW3__I2C2_SDA | PC,
- .gpio_mode = MX6Q_PAD_KEY_ROW3__GPIO4_IO13 | PC,
- .gp = IMX_GPIO_NR(4, 13)
- }
-};
-static struct i2c_pads_info mx6dl_i2c_pad_info1 = {
- .scl = {
- .i2c_mode = MX6DL_PAD_KEY_COL3__I2C2_SCL | PC,
- .gpio_mode = MX6DL_PAD_KEY_COL3__GPIO4_IO12 | PC,
- .gp = IMX_GPIO_NR(4, 12)
- },
- .sda = {
- .i2c_mode = MX6DL_PAD_KEY_ROW3__I2C2_SDA | PC,
- .gpio_mode = MX6DL_PAD_KEY_ROW3__GPIO4_IO13 | PC,
- .gp = IMX_GPIO_NR(4, 13)
+/*
+ * I2C pad configs:
+ * I2C1: GSC
+ * I2C2: PMIC,PCIe Switch,Clock,Mezz
+ * I2C3: Multimedia/Expansion
+ */
+static struct i2c_pads_info mx6q_i2c_pad_info[] = {
+ {
+ .scl = {
+ .i2c_mode = MX6Q_PAD_EIM_D21__I2C1_SCL | PC,
+ .gpio_mode = MX6Q_PAD_EIM_D21__GPIO3_IO21 | PC,
+ .gp = IMX_GPIO_NR(3, 21)
+ },
+ .sda = {
+ .i2c_mode = MX6Q_PAD_EIM_D28__I2C1_SDA | PC,
+ .gpio_mode = MX6Q_PAD_EIM_D28__GPIO3_IO28 | PC,
+ .gp = IMX_GPIO_NR(3, 28)
+ }
+ }, {
+ .scl = {
+ .i2c_mode = MX6Q_PAD_KEY_COL3__I2C2_SCL | PC,
+ .gpio_mode = MX6Q_PAD_KEY_COL3__GPIO4_IO12 | PC,
+ .gp = IMX_GPIO_NR(4, 12)
+ },
+ .sda = {
+ .i2c_mode = MX6Q_PAD_KEY_ROW3__I2C2_SDA | PC,
+ .gpio_mode = MX6Q_PAD_KEY_ROW3__GPIO4_IO13 | PC,
+ .gp = IMX_GPIO_NR(4, 13)
+ }
+ }, {
+ .scl = {
+ .i2c_mode = MX6Q_PAD_GPIO_3__I2C3_SCL | PC,
+ .gpio_mode = MX6Q_PAD_GPIO_3__GPIO1_IO03 | PC,
+ .gp = IMX_GPIO_NR(1, 3)
+ },
+ .sda = {
+ .i2c_mode = MX6Q_PAD_GPIO_6__I2C3_SDA | PC,
+ .gpio_mode = MX6Q_PAD_GPIO_6__GPIO1_IO06 | PC,
+ .gp = IMX_GPIO_NR(1, 6)
+ }
}
};

-/* I2C3: Misc/Expansion */
-static struct i2c_pads_info mx6q_i2c_pad_info2 = {
- .scl = {
- .i2c_mode = MX6Q_PAD_GPIO_3__I2C3_SCL | PC,
- .gpio_mode = MX6Q_PAD_GPIO_3__GPIO1_IO03 | PC,
- .gp = IMX_GPIO_NR(1, 3)
- },
- .sda = {
- .i2c_mode = MX6Q_PAD_GPIO_6__I2C3_SDA | PC,
- .gpio_mode = MX6Q_PAD_GPIO_6__GPIO1_IO06 | PC,
- .gp = IMX_GPIO_NR(1, 6)
- }
-};
-static struct i2c_pads_info mx6dl_i2c_pad_info2 = {
- .scl = {
- .i2c_mode = MX6DL_PAD_GPIO_3__I2C3_SCL | PC,
- .gpio_mode = MX6DL_PAD_GPIO_3__GPIO1_IO03 | PC,
- .gp = IMX_GPIO_NR(1, 3)
- },
- .sda = {
- .i2c_mode = MX6DL_PAD_GPIO_6__I2C3_SDA | PC,
- .gpio_mode = MX6DL_PAD_GPIO_6__GPIO1_IO06 | PC,
- .gp = IMX_GPIO_NR(1, 6)
+static struct i2c_pads_info mx6dl_i2c_pad_info[] = {
+ {
+ .scl = {
+ .i2c_mode = MX6DL_PAD_EIM_D21__I2C1_SCL | PC,
+ .gpio_mode = MX6DL_PAD_EIM_D21__GPIO3_IO21 | PC,
+ .gp = IMX_GPIO_NR(3, 21)
+ },
+ .sda = {
+ .i2c_mode = MX6DL_PAD_EIM_D28__I2C1_SDA | PC,
+ .gpio_mode = MX6DL_PAD_EIM_D28__GPIO3_IO28 | PC,
+ .gp = IMX_GPIO_NR(3, 28)
+ }
+ }, {
+ .scl = {
+ .i2c_mode = MX6DL_PAD_KEY_COL3__I2C2_SCL | PC,
+ .gpio_mode = MX6DL_PAD_KEY_COL3__GPIO4_IO12 | PC,
+ .gp = IMX_GPIO_NR(4, 12)
+ },
+ .sda = {
+ .i2c_mode = MX6DL_PAD_KEY_ROW3__I2C2_SDA | PC,
+ .gpio_mode = MX6DL_PAD_KEY_ROW3__GPIO4_IO13 | PC,
+ .gp = IMX_GPIO_NR(4, 13)
+ }
+ }, {
+ .scl = {
+ .i2c_mode = MX6DL_PAD_GPIO_3__I2C3_SCL | PC,
+ .gpio_mode = MX6DL_PAD_GPIO_3__GPIO1_IO03 | PC,
+ .gp = IMX_GPIO_NR(1, 3)
+ },
+ .sda = {
+ .i2c_mode = MX6DL_PAD_GPIO_6__I2C3_SDA | PC,
+ .gpio_mode = MX6DL_PAD_GPIO_6__GPIO1_IO06 | PC,
+ .gp = IMX_GPIO_NR(1, 6)
+ }
}
};

-void setup_ventana_i2c(void)
+void setup_ventana_i2c(int i2c)
{
- if (is_cpu_type(MXC_CPU_MX6Q)) {
- setup_i2c(0, CONFIG_SYS_I2C_SPEED, 0x7f, &mx6q_i2c_pad_info0);
- setup_i2c(1, CONFIG_SYS_I2C_SPEED, 0x7f, &mx6q_i2c_pad_info1);
- setup_i2c(2, CONFIG_SYS_I2C_SPEED, 0x7f, &mx6q_i2c_pad_info2);
- } else {
- setup_i2c(0, CONFIG_SYS_I2C_SPEED, 0x7f, &mx6dl_i2c_pad_info0);
- setup_i2c(1, CONFIG_SYS_I2C_SPEED, 0x7f, &mx6dl_i2c_pad_info1);
- setup_i2c(2, CONFIG_SYS_I2C_SPEED, 0x7f, &mx6dl_i2c_pad_info2);
- }
+ struct i2c_pads_info *p;
+
+ if (is_cpu_type(MXC_CPU_MX6Q))
+ p = &mx6q_i2c_pad_info[i2c];
+ else
+ p = &mx6dl_i2c_pad_info[i2c];
+
+ setup_i2c(i2c, CONFIG_SYS_I2C_SPEED, 0x7f, p);
}

/*
diff --git a/board/gateworks/gw_ventana/common.h b/board/gateworks/gw_ventana/common.h
index 8019e27f6e..027e972280 100644
--- a/board/gateworks/gw_ventana/common.h
+++ b/board/gateworks/gw_ventana/common.h
@@ -85,7 +85,7 @@ struct ventana {
extern struct ventana gpio_cfg[GW_UNKNOWN];

/* configure i2c iomux */
-void setup_ventana_i2c(void);
+void setup_ventana_i2c(int);
/* configure uart iomux */
void setup_iomux_uart(void);
/* conifgure PMIC */
diff --git a/board/gateworks/gw_ventana/gw_ventana.c b/board/gateworks/gw_ventana/gw_ventana.c
index 27a3911acd..c0b0cc9bb9 100644
--- a/board/gateworks/gw_ventana/gw_ventana.c
+++ b/board/gateworks/gw_ventana/gw_ventana.c
@@ -631,7 +631,9 @@ int board_init(void)
#ifdef CONFIG_MXC_SPI
setup_spi();
#endif
- setup_ventana_i2c();
+ setup_ventana_i2c(0);
+ setup_ventana_i2c(1);
+ setup_ventana_i2c(2);

#ifdef CONFIG_SATA
setup_sata();
diff --git a/board/gateworks/gw_ventana/gw_ventana_spl.c b/board/gateworks/gw_ventana/gw_ventana_spl.c
index a6ac546e95..80ade9f437 100644
--- a/board/gateworks/gw_ventana/gw_ventana_spl.c
+++ b/board/gateworks/gw_ventana/gw_ventana_spl.c
@@ -599,9 +599,10 @@ void board_init_f(ulong dummy)
/* setup AXI */
gpr_init();

- /* iomux and setup of i2c */
+ /* iomux and setup of uart/i2c */
setup_iomux_uart();
- setup_ventana_i2c();
+ setup_ventana_i2c(0);
+ setup_ventana_i2c(1);

/* setup GP timer */
timer_init();
--
2.17.1