You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
167 lines
4.4 KiB
Diff
167 lines
4.4 KiB
Diff
From 806a489c720767f63bf5046c2ccd87ded9549c1c Mon Sep 17 00:00:00 2001
|
|
From: John Crispin <blogic@openwrt.org>
|
|
Date: Sat, 16 Mar 2013 00:50:57 +0100
|
|
Subject: [PATCH 104/121] MIPS: ralink: add pinmux driver
|
|
|
|
Add code to setup the pinmux on ralonk SoC. The SoC has a single 32 bit register
|
|
for this functionality with simple on/off bits. Building a full featured pinctrl
|
|
driver would be overkill.
|
|
|
|
Signed-off-by: John Crispin <blogic@openwrt.org>
|
|
---
|
|
arch/mips/ralink/Makefile | 2 +-
|
|
arch/mips/ralink/common.h | 5 ++-
|
|
arch/mips/ralink/of.c | 2 ++
|
|
arch/mips/ralink/pinmux.c | 76 +++++++++++++++++++++++++++++++++++++++++++++
|
|
arch/mips/ralink/rt305x.c | 6 ++--
|
|
5 files changed, 85 insertions(+), 6 deletions(-)
|
|
create mode 100644 arch/mips/ralink/pinmux.c
|
|
|
|
--- a/arch/mips/ralink/Makefile
|
|
+++ b/arch/mips/ralink/Makefile
|
|
@@ -6,7 +6,7 @@
|
|
# Copyright (C) 2009-2011 Gabor Juhos <juhosg@openwrt.org>
|
|
# Copyright (C) 2013 John Crispin <blogic@openwrt.org>
|
|
|
|
-obj-y := prom.o of.o reset.o clk.o irq.o
|
|
+obj-y := prom.o of.o reset.o clk.o irq.o pinmux.o
|
|
|
|
obj-$(CONFIG_SOC_RT305X) += rt305x.o
|
|
|
|
--- a/arch/mips/ralink/common.h
|
|
+++ b/arch/mips/ralink/common.h
|
|
@@ -22,9 +22,10 @@ struct ralink_pinmux {
|
|
struct ralink_pinmux_grp *mode;
|
|
struct ralink_pinmux_grp *uart;
|
|
int uart_shift;
|
|
+ u32 uart_mask;
|
|
void (*wdt_reset)(void);
|
|
};
|
|
-extern struct ralink_pinmux gpio_pinmux;
|
|
+extern struct ralink_pinmux rt_pinmux;
|
|
|
|
struct ralink_soc_info {
|
|
unsigned char sys_type[RAMIPS_SYS_TYPE_LEN];
|
|
@@ -41,4 +42,6 @@ extern void prom_soc_init(struct ralink_
|
|
|
|
__iomem void *plat_of_remap_node(const char *node);
|
|
|
|
+void ralink_pinmux(void);
|
|
+
|
|
#endif /* _RALINK_COMMON_H__ */
|
|
--- a/arch/mips/ralink/of.c
|
|
+++ b/arch/mips/ralink/of.c
|
|
@@ -101,6 +101,8 @@ static int __init plat_of_setup(void)
|
|
if (of_platform_populate(NULL, of_ids, NULL, NULL))
|
|
panic("failed to populate DT\n");
|
|
|
|
+ ralink_pinmux();
|
|
+
|
|
return 0;
|
|
}
|
|
|
|
--- /dev/null
|
|
+++ b/arch/mips/ralink/pinmux.c
|
|
@@ -0,0 +1,76 @@
|
|
+/*
|
|
+ * This program is free software; you can redistribute it and/or modify it
|
|
+ * under the terms of the GNU General Public License version 2 as published
|
|
+ * by the Free Software Foundation.
|
|
+ *
|
|
+ * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
|
|
+ */
|
|
+
|
|
+#include <linux/kernel.h>
|
|
+#include <linux/of.h>
|
|
+
|
|
+#include <asm/mach-ralink/ralink_regs.h>
|
|
+
|
|
+#include "common.h"
|
|
+
|
|
+#define SYSC_REG_GPIO_MODE 0x60
|
|
+
|
|
+static u32 ralink_mux_mask(const char *name, struct ralink_pinmux_grp *grps)
|
|
+{
|
|
+ for (; grps->name; grps++)
|
|
+ if (!strcmp(grps->name, name))
|
|
+ return grps->mask;
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+void ralink_pinmux(void)
|
|
+{
|
|
+ const __be32 *wdt;
|
|
+ struct device_node *np;
|
|
+ struct property *prop;
|
|
+ const char *uart, *pin;
|
|
+ u32 mode = 0;
|
|
+
|
|
+ np = of_find_compatible_node(NULL, NULL, "ralink,rt3050-sysc");
|
|
+ if (!np)
|
|
+ return;
|
|
+
|
|
+ of_property_for_each_string(np, "ralink,gpiomux", prop, pin) {
|
|
+ int m = ralink_mux_mask(pin, rt_pinmux.mode);
|
|
+ if (m) {
|
|
+ mode |= m;
|
|
+ pr_debug("pinmux: registered gpiomux \"%s\"\n", pin);
|
|
+ } else {
|
|
+ pr_err("pinmux: failed to load \"%s\"\n", pin);
|
|
+ }
|
|
+ }
|
|
+
|
|
+ of_property_for_each_string(np, "ralink,pinmux", prop, pin) {
|
|
+ int m = ralink_mux_mask(pin, rt_pinmux.mode);
|
|
+ if (m) {
|
|
+ mode &= ~m;
|
|
+ pr_debug("pinmux: registered pinmux \"%s\"\n", pin);
|
|
+ } else {
|
|
+ pr_err("pinmux: failed to load group \"%s\"\n", pin);
|
|
+ }
|
|
+ }
|
|
+
|
|
+ of_property_read_string(np, "ralink,uartmux", &uart);
|
|
+ if (uart) {
|
|
+ int m = ralink_mux_mask(uart, rt_pinmux.uart);
|
|
+ mode |= rt_pinmux.uart_mask << rt_pinmux.uart_shift;
|
|
+ if (m) {
|
|
+ mode &= ~(m << rt_pinmux.uart_shift);
|
|
+ pr_debug("pinmux: registered uartmux \"%s\"\n", uart);
|
|
+ } else {
|
|
+ pr_debug("pinmux: registered uartmux \"gpio\"\n");
|
|
+ }
|
|
+ }
|
|
+
|
|
+ wdt = of_get_property(np, "ralink,wdtmux", NULL);
|
|
+ if (wdt && *wdt && rt_pinmux.wdt_reset)
|
|
+ rt_pinmux.wdt_reset();
|
|
+
|
|
+ rt_sysc_w32(mode, SYSC_REG_GPIO_MODE);
|
|
+}
|
|
--- a/arch/mips/ralink/rt305x.c
|
|
+++ b/arch/mips/ralink/rt305x.c
|
|
@@ -97,9 +97,6 @@ struct ralink_pinmux_grp uart_mux[] = {
|
|
.mask = RT305X_GPIO_MODE_GPIO_I2S,
|
|
.gpio_first = RT305X_GPIO_7,
|
|
.gpio_last = RT305X_GPIO_14,
|
|
- }, {
|
|
- .name = "gpio",
|
|
- .mask = RT305X_GPIO_MODE_GPIO,
|
|
}, {0}
|
|
};
|
|
|
|
@@ -114,10 +111,11 @@ void rt305x_wdt_reset(void)
|
|
rt_sysc_w32(t, SYSC_REG_SYSTEM_CONFIG);
|
|
}
|
|
|
|
-struct ralink_pinmux gpio_pinmux = {
|
|
+struct ralink_pinmux rt_pinmux = {
|
|
.mode = mode_mux,
|
|
.uart = uart_mux,
|
|
.uart_shift = RT305X_GPIO_MODE_UART0_SHIFT,
|
|
+ .uart_mask = RT305X_GPIO_MODE_GPIO,
|
|
.wdt_reset = rt305x_wdt_reset,
|
|
};
|
|
|