There are two different publicly-released revisions of the PinePhone
hardware, versions 1.1 and 1.2; and they need different device trees.
Since some GPIO pins were rerouted, we can use that to distinguish
between them.
Signed-off-by: Samuel Holland <sam...@sholland.org>
---
arch/arm/mach-sunxi/Kconfig | 7 +++++++
board/sunxi/board.c | 21 +++++++++++++++++++++
2 files changed, 28 insertions(+)
diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig
index be0822bfb7d..8421f3b6854 100644
--- a/arch/arm/mach-sunxi/Kconfig
+++ b/arch/arm/mach-sunxi/Kconfig
@@ -1010,4 +1010,11 @@ config PINE64_DT_SELECTION
option, the device tree selection code specific to Pine64 which
utilizes the DRAM size will be enabled.
+config PINEPHONE_DT_SELECTION
+ bool "Enable PinePhone device tree selection code"
+ depends on MACH_SUN50I
+ help
+ Enable this option to automatically select the device tree for the
+ correct PinePhone hardware revision during boot.
+
endif
diff --git a/board/sunxi/board.c b/board/sunxi/board.c
index fb0d5bf4743..3d64ed18664 100644
--- a/board/sunxi/board.c
+++ b/board/sunxi/board.c
@@ -27,6 +27,7 @@
#include <asm/arch/dram.h>
#include <asm/arch/gpio.h>
#include <asm/arch/mmc.h>
+#include <asm/arch/prcm.h>
#include <asm/arch/spl.h>
#include <linux/delay.h>
#include <u-boot/crc.h>
@@ -920,6 +921,26 @@ int board_fit_config_name_match(const char *name)
best_dt_name = "sun50i-a64-pine64";
}
#endif
+#ifdef CONFIG_PINEPHONE_DT_SELECTION
+ else if (strstr(best_dt_name, "-pinephone")) {
+ /* Differentiate the PinePhone revisions by GPIO inputs. */
+ prcm_apb0_enable(PRCM_APB0_GATE_PIO);
+ sunxi_gpio_set_pull(SUNXI_GPL(6), SUNXI_GPIO_PULL_UP);
+ sunxi_gpio_set_cfgpin(SUNXI_GPL(6), SUNXI_GPIO_INPUT);
+ udelay(100);
+
+ /* PL6 is pulled low by the modem on v1.2. */
+ if (gpio_get_value(SUNXI_GPL(6)) == 0)
+ best_dt_name = "sun50i-a64-pinephone-1.2";
+ else
+ best_dt_name = "sun50i-a64-pinephone-1.1";
+
+ sunxi_gpio_set_cfgpin(SUNXI_GPL(6), SUNXI_GPIO_DISABLE);
+ sunxi_gpio_set_pull(SUNXI_GPL(6), SUNXI_GPIO_PULL_DISABLE);
+ prcm_apb0_disable(PRCM_APB0_GATE_PIO);
+ }
+#endif
+
return strcmp(name, best_dt_name);
}
#endif
--
2.26.2
