arm: add support for SoC s5p4418 (cpu) / nanopi2 board
Changes in relation to FriendlyARM's U-Boot nanopi2-v2016.01:
- SPL not supported yet --> no spl-dir in arch/arm/cpu/armv7/s5p4418/.
Appropriate line in Makefile removed.
- cpu.c: '#include <cpu_func.h>' added.
- arch/arm/cpu/armv7/s5p4418/u-boot.lds removed, is not required
anylonger.
- "obj-$(CONFIG_ARCH_NEXELL) += s5p-common/" added to
arch/arm/cpu/armv7/Makefile since s5p-common/pwm.c is used instead
of drivers/pwm/pwm-nexell.c.
- s5p4418.dtsi: '#include "../../../include/generated/autoconf.h"'
removed, is not necessary, error at out-of-tree building.
'#ifdef CONFIG_CPU_NXP4330'-blocks (2x) removed. Some minor changes
regarding mmc. 'u-boot,dm-pre-reloc' added to dp0 because of added
DM_VIDEO support.
- board/s5p4418/ renamed to board/friendlyarm/
- All s5p4418-boards except nanopi2 removed because there is no
possibility to test the other boards.
- Kconfig: Changes to have a structure like mach-bcm283x (RaspberryPi),
e.g. "config ..." entries moved from/to other Kconfig.
- "CONFIG_" removed from several s5p4418/nanopi2 specific defines
because the appropriate values do not need to be configurable.
- nanopi2/board.c: All getenv(), getenv_ulong(), setenv() and saveenv()
renamed to env_get(), env_get_ulong(), env_set() and env_save(),
respectively. MACH_TYPE_S5P4418 is not defined anymore, therefore
appropriate code removed (not necessary for DT-kernels).
- nanopi2/onewire.c: All crc8() renamed to crc8_ow() because crc8() is
already defined in lib/crc8.c (with different parameters).
- dts: "nexell,s5pxx18-i2c" used instead of "i2c-gpio", i2c0 and
i2c1 added. gmac-, ehci- and dwc2otg-entries removed because the
appropriate functionality is not supported yet. New mmc-property
"mmcboost" added.
s5p4418-pinctrl.dtsi: gmac-entries removed, mmc- and i2c-entries
added.
- '#ifdef CONFIG...' changed to 'if (IS_ENABLED(CONFIG...))' where
possible (and similar).
Signed-off-by: Stefan Bosch <stefan_b@posteo.net>
diff --git a/board/friendlyarm/nanopi2/hwrev.c b/board/friendlyarm/nanopi2/hwrev.c
new file mode 100644
index 0000000..b1e23a4
--- /dev/null
+++ b/board/friendlyarm/nanopi2/hwrev.c
@@ -0,0 +1,108 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) Guangzhou FriendlyARM Computer Tech. Co., Ltd.
+ * (http://www.friendlyarm.com)
+ */
+
+#include <config.h>
+#include <common.h>
+#include <i2c.h>
+#include <asm/io.h>
+
+#include <asm/arch/nexell.h>
+#include <asm/arch/nx_gpio.h>
+
+/* Board revision list: <PCB3 | PCB2 | PCB1>
+ * 0b000 - NanoPi 2
+ * 0b001 - NanoPC-T2
+ * 0b010 - NanoPi S2
+ * 0b011 - Smart4418
+ * 0b100 - NanoPi Fire 2A
+ * 0b111 - NanoPi M2A
+ *
+ * Extented revision:
+ * 0b001 - Smart4418-SDK
+ */
+#define __IO_GRP 2 /* GPIO_C */
+#define __IO_PCB1 26
+#define __IO_PCB2 27
+#define __IO_PCB3 25
+
+static int pcb_rev = -1;
+static int base_rev;
+
+static void bd_hwrev_config_gpio(void)
+{
+ int gpios[3][2] = {
+ { __IO_PCB1, 1 },
+ { __IO_PCB2, 1 },
+ { __IO_PCB3, 1 },
+ };
+ int i;
+
+ /* gpio input mode, pull-down */
+ for (i = 0; i < 3; i++) {
+ nx_gpio_set_pad_function(__IO_GRP, gpios[i][0], gpios[i][1]);
+ nx_gpio_set_output_enable(__IO_GRP, gpios[i][0], 0);
+ nx_gpio_set_pull_mode(__IO_GRP, gpios[i][0], 0);
+ }
+}
+
+void bd_hwrev_init(void)
+{
+ if (pcb_rev >= 0)
+ return;
+
+ bd_hwrev_config_gpio();
+
+ pcb_rev = nx_gpio_get_input_value(__IO_GRP, __IO_PCB1);
+ pcb_rev |= nx_gpio_get_input_value(__IO_GRP, __IO_PCB2) << 1;
+ pcb_rev |= nx_gpio_get_input_value(__IO_GRP, __IO_PCB3) << 2;
+}
+
+/* Get extended revision for SmartXX18 */
+void bd_base_rev_init(void)
+{
+ struct udevice *dev;
+ u8 val = 0;
+
+ if (pcb_rev != 0x3)
+ return;
+
+#define PCA9536_I2C_BUS 2
+#define PCA9636_I2C_ADDR 0x41
+ if (i2c_get_chip_for_busnum
+ (PCA9536_I2C_BUS, PCA9636_I2C_ADDR, 1, &dev))
+ return;
+
+ if (!dm_i2c_read(dev, 0, &val, 1))
+ base_rev = (val & 0xf);
+}
+
+/* To override __weak symbols */
+u32 get_board_rev(void)
+{
+ return (base_rev << 8) | pcb_rev;
+}
+
+const char *get_board_name(void)
+{
+ bd_hwrev_init();
+
+ switch (pcb_rev) {
+ case 0:
+ return "NanoPi 2";
+ case 1:
+ return "NanoPC-T2";
+ case 2:
+ return "NanoPi S2";
+ case 3:
+ return "Smart4418";
+ case 4:
+ return "NanoPi Fire 2A";
+ case 7:
+ return "NanoPi M2A";
+ default:
+ return "s5p4418-X";
+ }
+}