[U-Boot] [PATCH v2 28/30] arm: socfpga: arria10: Added drivers for Arria10 pinmux/pins configuration

Chee Tien Fong
2016-12-28T06:34:39Z

From: Tien Fong Chee <tien.fong.chee@intel.com>

Signed-off-by: Tien Fong Chee <tien.fong.chee@intel.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Dinh Nguyen <dinguyen@kernel.org>
Cc: Chin Liang See <chin.liang.see@intel.com>
Cc: Tien Fong <skywindctf@gmail.com>
---
Changes for V2
- Removed extern declaration.
---
arch/arm/mach-socfpga/include/mach/pinmux.h | 17 +++++
arch/arm/mach-socfpga/pinmux.c | 104 ++++++++++++++++++++++++++++
2 files changed, 121 insertions(+)
create mode 100644 arch/arm/mach-socfpga/include/mach/pinmux.h
create mode 100644 arch/arm/mach-socfpga/pinmux.c

diff --git a/arch/arm/mach-socfpga/include/mach/pinmux.h b/arch/arm/mach-socfpga/include/mach/pinmux.h
new file mode 100644
index 0000000..ff54caa
--- /dev/null
+++ b/arch/arm/mach-socfpga/include/mach/pinmux.h
@@ -0,0 +1,17 @@
+/*
+ * Copyright (C) 2016 Intel Corporation <www.intel.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#ifndef _PINMUX_H_
+#define _PINMUX_H_
+
+#ifndef __ASSEMBLY__
+int config_dedicated_pins(const void *blob);
+int config_pins(const void *blob, const char *pin_grp);
+#endif
+
+
+
+#endif /* _PINMUX_H_ */
diff --git a/arch/arm/mach-socfpga/pinmux.c b/arch/arm/mach-socfpga/pinmux.c
new file mode 100644
index 0000000..d45722f
--- /dev/null
+++ b/arch/arm/mach-socfpga/pinmux.c
@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2016 Intel Corporation <www.intel.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <fdtdec.h>
+#include <asm/arch/pinmux.h>
+
+int config_dedicated_pins(const void *blob);
+int config_pins(const void *blob, const char *pin_grp);
+static int __do_pinctr_pins(const void *blob, int child, const char *node_name);
+static int do_pinctrl_pins(const void *blob, int node, const char *child_name);
+
+static int __do_pinctr_pins(const void *blob, int child, const char *node_name)
+{
+ int len;
+ fdt_addr_t base_addr;
+ fdt_size_t size;
+ const u32 *cell;
+ u32 offset, value;
+
+ base_addr = fdtdec_get_addr_size(blob, child, "reg", &size);
+ if (base_addr != FDT_ADDR_T_NONE) {
+ cell = fdt_getprop(blob, child, "pinctrl-single,pins",
+ &len);
+ if (cell != NULL) {
+ debug("%p %d\n", cell, len);
+ for (;len > 0; len -= (2*sizeof(u32))) {
+ offset = fdt32_to_cpu(*cell++);
+ value = fdt32_to_cpu(*cell++);
+ debug("<0x%x 0x%x>\n", offset, value);
+ writel(value, base_addr + offset);
+ }
+ return 0;
+ }
+ }
+ return 1;
+}
+
+static int do_pinctrl_pins(const void *blob, int node, const char *child_name)
+{
+ int child, len;
+ const char *node_name;
+
+ child = fdt_first_subnode(blob, node);
+
+ if (child < 0)
+ return 2;
+
+ node_name = fdt_get_name(blob, child, &len);
+
+ while (node_name) {
+ if (!strcmp(child_name, node_name)) {
+ __do_pinctr_pins(blob, child, node_name);
+ return(0);
+ }
+ child = fdt_next_subnode(blob, child);
+
+ if (child < 0)
+ break;
+
+ node_name = fdt_get_name(blob, child, &len);
+ }
+
+ return 1;
+}
+
+int config_dedicated_pins(const void *blob)
+{
+ int node;
+
+ node = fdtdec_next_compatible(blob, 0,
+ COMPAT_ALTERA_SOCFPGA_PINCTRL_SINGLE);
+
+ if (node < 0)
+ return 1;
+
+ if (do_pinctrl_pins(blob, node, "dedicated_cfg"))
+ return 2;
+
+ if (do_pinctrl_pins(blob, node, "dedicated"))
+ return 3;
+
+ return 0;
+}
+
+int config_pins(const void *blob, const char *pin_grp)
+{
+ int node;
+
+ node = fdtdec_next_compatible(blob, 0,
+ COMPAT_ALTERA_SOCFPGA_PINCTRL_SINGLE);
+
+ if (node < 0)
+ return 1;
+
+ if (do_pinctrl_pins(blob, node, pin_grp))
+ return 2;
+
+ return 0;
+}
--
2.2.2