imx: ventana: add fdt fixup to enable UHS-I support on selected boards
UHS-I support is available on Ventana boards with micro-SD sockets depending
on the board revision. For backwards compatibility to not break users
who have old bootloaders and newer kernels the device-tree on boards with
microSD disables UHS-I support by default by defining the no-1-8-v property
in the esdhc controller node. For models/revisions that support switchable
1.8V/3.3V I/O which is detectable by the presence of a pull-down on the
SD3_VSELECT pin we remove that property to enable support in the kernel.
Additionally we add SD3_VSELECT to the pinmux for clarity (even though U-Boot
does not currently support UHS-I modes requiring 1.8V I/O).
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
diff --git a/board/gateworks/gw_ventana/gw_ventana.c b/board/gateworks/gw_ventana/gw_ventana.c
index 15e4bf1..82313e8 100644
--- a/board/gateworks/gw_ventana/gw_ventana.c
+++ b/board/gateworks/gw_ventana/gw_ventana.c
@@ -60,8 +60,7 @@
IOMUX_PADS(PAD_SD3_DAT1__SD3_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
IOMUX_PADS(PAD_SD3_DAT2__SD3_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
IOMUX_PADS(PAD_SD3_DAT3__SD3_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
- /* CD */
- IOMUX_PADS(PAD_SD3_DAT5__GPIO7_IO00 | MUX_PAD_CTRL(IRQ_PAD_CTRL)),
+ IOMUX_PADS(PAD_SD3_DAT5__GPIO7_IO00 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
};
/* ENET */
@@ -792,6 +791,17 @@
}
}
+/* remove a property of a node if the node is found */
+static inline void ft_delprop_path(void *blob, const char *path,
+ const char *name)
+{
+ int i = fdt_path_offset(blob, path);
+ if (i) {
+ debug("removing %s/%s\n", path, name);
+ fdt_delprop(blob, i, name);
+ }
+}
+
/*
* called prior to booting kernel or by 'fdt boardsetup' command
*
@@ -895,6 +905,11 @@
range[1] = cpu_to_fdt32(23);
}
}
+
+ /* these have broken usd_vsel */
+ if (strstr((const char *)info->model, "SP318-B") ||
+ strstr((const char *)info->model, "SP331-B"))
+ gpio_cfg[board_type].usd_vsel = 0;
}
/*
@@ -954,6 +969,13 @@
}
}
+ /* remove no-1-8-v if UHS-I support is present */
+ if (gpio_cfg[board_type].usd_vsel) {
+ debug("Enabling UHS-I support\n");
+ ft_delprop_path(blob, "/soc/aips-bus@02100000/usdhc@02198000",
+ "no-1-8-v");
+ }
+
/*
* Peripheral Config:
* remove nodes by alias path if EEPROM config tells us the