openwrt-xburst/target/linux/lantiq/patches-3.3/0003-MIPS-lantiq-change-ltq_request_gpio-call-signature.patch

From 834353ea867a84649d452bac03b97ce32dc6e318 Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Fri, 11 Nov 2011 12:45:24 +0100
Subject: [PATCH 03/70] MIPS: lantiq: change ltq_request_gpio() call signature

ltq_request_gpio() was using alt0/1 to multiplex the function of GPIO pins.
This was XWAY specific. In order to also accomodate SoCs that require more bits
we use a 32bit mask instead. This way the call signature is consistent between
XWAY and FALC-ON.

Signed-off-by: John Crispin <blogic@openwrt.org>
Signed-off-by: Thomas Langer <thomas.langer@lantiq.com>
---
 .../mips/include/asm/mach-lantiq/xway/lantiq_soc.h |    4 +-
 arch/mips/lantiq/xway/gpio.c                       |    8 ++--
 arch/mips/lantiq/xway/gpio_stp.c                   |    6 ++--
 arch/mips/pci/pci-lantiq.c                         |   36 +++++++++----------
 4 files changed, 26 insertions(+), 28 deletions(-)

--- a/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
+++ b/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
@@ -135,8 +135,8 @@ extern __iomem void *ltq_ebu_membase;
 extern __iomem void *ltq_cgu_membase;
 
 /* request a non-gpio and set the PIO config */
-extern int  ltq_gpio_request(unsigned int pin, unsigned int alt0,
-	unsigned int alt1, unsigned int dir, const char *name);
+extern int  ltq_gpio_request(unsigned int pin, unsigned int mux,
+				unsigned int dir, const char *name);
 extern void ltq_pmu_enable(unsigned int module);
 extern void ltq_pmu_disable(unsigned int module);
 extern void ltq_cgu_enable(unsigned int clk);
--- a/arch/mips/lantiq/xway/gpio.c
+++ b/arch/mips/lantiq/xway/gpio.c
@@ -48,8 +48,8 @@ int irq_to_gpio(unsigned int gpio)
 }
 EXPORT_SYMBOL(irq_to_gpio);
 
-int ltq_gpio_request(unsigned int pin, unsigned int alt0,
-	unsigned int alt1, unsigned int dir, const char *name)
+int ltq_gpio_request(unsigned int pin, unsigned int mux,
+			unsigned int dir, const char *name)
 {
 	int id = 0;
 
@@ -67,13 +67,13 @@ int ltq_gpio_request(unsigned int pin, u
 		pin -= PINS_PER_PORT;
 		id++;
 	}
-	if (alt0)
+	if (mux & 0x2)
 		ltq_gpio_setbit(ltq_gpio_port[id].membase,
 			LTQ_GPIO_ALTSEL0, pin);
 	else
 		ltq_gpio_clearbit(ltq_gpio_port[id].membase,
 			LTQ_GPIO_ALTSEL0, pin);
-	if (alt1)
+	if (mux & 0x1)
 		ltq_gpio_setbit(ltq_gpio_port[id].membase,
 			LTQ_GPIO_ALTSEL1, pin);
 	else
--- a/arch/mips/lantiq/xway/gpio_stp.c
+++ b/arch/mips/lantiq/xway/gpio_stp.c
@@ -79,9 +79,9 @@ static struct gpio_chip ltq_stp_chip = {
 static int ltq_stp_hw_init(void)
 {
 	/* the 3 pins used to control the external stp */
-	ltq_gpio_request(4, 1, 0, 1, "stp-st");
-	ltq_gpio_request(5, 1, 0, 1, "stp-d");
-	ltq_gpio_request(6, 1, 0, 1, "stp-sh");
+	ltq_gpio_request(4, 2, 1, "stp-st");
+	ltq_gpio_request(5, 2, 1, "stp-d");
+	ltq_gpio_request(6, 2, 1, "stp-sh");
 
 	/* sane defaults */
 	ltq_stp_w32(0, LTQ_STP_AR);
--- a/arch/mips/pci/pci-lantiq.c
+++ b/arch/mips/pci/pci-lantiq.c
@@ -70,28 +70,27 @@
 
 struct ltq_pci_gpio_map {
 	int pin;
-	int alt0;
-	int alt1;
+	int mux;
 	int dir;
 	char *name;
 };
 
 /* the pci core can make use of the following gpios */
 static struct ltq_pci_gpio_map ltq_pci_gpio_map[] = {
-	{ 0, 1, 0, 0, "pci-exin0" },
-	{ 1, 1, 0, 0, "pci-exin1" },
-	{ 2, 1, 0, 0, "pci-exin2" },
-	{ 39, 1, 0, 0, "pci-exin3" },
-	{ 10, 1, 0, 0, "pci-exin4" },
-	{ 9, 1, 0, 0, "pci-exin5" },
-	{ 30, 1, 0, 1, "pci-gnt1" },
-	{ 23, 1, 0, 1, "pci-gnt2" },
-	{ 19, 1, 0, 1, "pci-gnt3" },
-	{ 38, 1, 0, 1, "pci-gnt4" },
-	{ 29, 1, 0, 0, "pci-req1" },
-	{ 31, 1, 0, 0, "pci-req2" },
-	{ 3, 1, 0, 0, "pci-req3" },
-	{ 37, 1, 0, 0, "pci-req4" },
+	{ 0, 2, 0, "pci-exin0" },
+	{ 1, 2, 0, "pci-exin1" },
+	{ 2, 2, 0, "pci-exin2" },
+	{ 39, 2, 0, "pci-exin3" },
+	{ 10, 2, 0, "pci-exin4" },
+	{ 9, 2, 0, "pci-exin5" },
+	{ 30, 2, 1, "pci-gnt1" },
+	{ 23, 2, 1, "pci-gnt2" },
+	{ 19, 2, 1, "pci-gnt3" },
+	{ 38, 2, 1, "pci-gnt4" },
+	{ 29, 2, 0, "pci-req1" },
+	{ 31, 2, 0, "pci-req2" },
+	{ 3, 2, 0, "pci-req3" },
+	{ 37, 2, 0, "pci-req4" },
 };
 
 __iomem void *ltq_pci_mapped_cfg;
@@ -157,13 +156,12 @@ static void ltq_pci_setup_gpio(int gpio)
 	for (i = 0; i < ARRAY_SIZE(ltq_pci_gpio_map); i++) {
 		if (gpio & (1 << i)) {
 			ltq_gpio_request(ltq_pci_gpio_map[i].pin,
-				ltq_pci_gpio_map[i].alt0,
-				ltq_pci_gpio_map[i].alt1,
+				ltq_pci_gpio_map[i].mux,
 				ltq_pci_gpio_map[i].dir,
 				ltq_pci_gpio_map[i].name);
 		}
 	}
-	ltq_gpio_request(21, 0, 0, 1, "pci-reset");
+	ltq_gpio_request(21, 0, 1, "pci-reset");
 	ltq_pci_req_mask = (gpio >> PCI_REQ_SHIFT) & PCI_REQ_MASK;
 }