diff options
Diffstat (limited to 'target/linux/lantiq/patches-3.0/0012-MIPS-lantiq-adds-GPIO3-support-on-AR9.patch')
| -rw-r--r-- | target/linux/lantiq/patches-3.0/0012-MIPS-lantiq-adds-GPIO3-support-on-AR9.patch | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/target/linux/lantiq/patches-3.0/0012-MIPS-lantiq-adds-GPIO3-support-on-AR9.patch b/target/linux/lantiq/patches-3.0/0012-MIPS-lantiq-adds-GPIO3-support-on-AR9.patch new file mode 100644 index 0000000000..e20b66b4e3 --- /dev/null +++ b/target/linux/lantiq/patches-3.0/0012-MIPS-lantiq-adds-GPIO3-support-on-AR9.patch @@ -0,0 +1,212 @@ +From 6b5e2ee7c8f9722d59213f17d423b3f90d80f822 Mon Sep 17 00:00:00 2001 +From: John Crispin <blogic@openwrt.org> +Date: Sat, 13 Aug 2011 13:59:50 +0200 +Subject: [PATCH 12/24] MIPS: lantiq: adds GPIO3 support on AR9 + +There are 3 16bit and 1 8bit gpio ports on AR9. The gpio driver needs a hack +at 2 places to make the different register layout of the GPIO3 work properly +with the driver. Before only GPIO0-2 were supported. As the GPIO number scheme +clashes with the new size, we also move the other gpio chips to new offsets. + +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 | 2 + + arch/mips/lantiq/xway/devices.c | 3 + + arch/mips/lantiq/xway/gpio.c | 62 ++++++++++++++++---- + arch/mips/lantiq/xway/gpio_ebu.c | 3 +- + arch/mips/lantiq/xway/gpio_stp.c | 3 +- + 5 files changed, 57 insertions(+), 16 deletions(-) + +diff --git a/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h b/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h +index da8ff95..421768e 100644 +--- a/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h ++++ b/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h +@@ -113,7 +113,9 @@ + #define LTQ_GPIO0_BASE_ADDR 0x1E100B10 + #define LTQ_GPIO1_BASE_ADDR 0x1E100B40 + #define LTQ_GPIO2_BASE_ADDR 0x1E100B70 ++#define LTQ_GPIO3_BASE_ADDR 0x1E100BA0 + #define LTQ_GPIO_SIZE 0x30 ++#define LTQ_GPIO3_SIZE 0x10 + + /* SSC */ + #define LTQ_SSC_BASE_ADDR 0x1e100800 +diff --git a/arch/mips/lantiq/xway/devices.c b/arch/mips/lantiq/xway/devices.c +index 9bacaa8..b7efac5 100644 +--- a/arch/mips/lantiq/xway/devices.c ++++ b/arch/mips/lantiq/xway/devices.c +@@ -34,6 +34,7 @@ static struct resource ltq_gpio_resource[] = { + MEM_RES("gpio0", LTQ_GPIO0_BASE_ADDR, LTQ_GPIO_SIZE), + MEM_RES("gpio1", LTQ_GPIO1_BASE_ADDR, LTQ_GPIO_SIZE), + MEM_RES("gpio2", LTQ_GPIO2_BASE_ADDR, LTQ_GPIO_SIZE), ++ MEM_RES("gpio3", LTQ_GPIO3_BASE_ADDR, LTQ_GPIO3_SIZE), + }; + + void __init ltq_register_gpio(void) +@@ -47,6 +48,8 @@ void __init ltq_register_gpio(void) + if (ltq_is_ar9() || ltq_is_vr9()) { + platform_device_register_simple("ltq_gpio", 2, + <q_gpio_resource[2], 1); ++ platform_device_register_simple("ltq_gpio", 3, ++ <q_gpio_resource[3], 1); + } + } + +diff --git a/arch/mips/lantiq/xway/gpio.c b/arch/mips/lantiq/xway/gpio.c +index a321451..2c48c17 100644 +--- a/arch/mips/lantiq/xway/gpio.c ++++ b/arch/mips/lantiq/xway/gpio.c +@@ -21,9 +21,15 @@ + #define LTQ_GPIO_ALTSEL0 0x0C + #define LTQ_GPIO_ALTSEL1 0x10 + #define LTQ_GPIO_OD 0x14 ++#define LTQ_GPIO3_OD 0x24 ++#define LTQ_GPIO3_ALTSEL1 0x24 + ++/* PORT3 only has 8 pins and its register layout ++ is slightly different */ + #define PINS_PER_PORT 16 +-#define MAX_PORTS 3 ++#define PINS_PORT3 8 ++#define MAX_PORTS 4 ++#define MAX_PIN 56 + + #define ltq_gpio_getbit(m, r, p) (!!(ltq_r32(m + r) & (1 << p))) + #define ltq_gpio_setbit(m, r, p) ltq_w32_mask(0, (1 << p), m + r) +@@ -53,7 +59,7 @@ int ltq_gpio_request(unsigned int pin, unsigned int alt0, + { + int id = 0; + +- if (pin >= (MAX_PORTS * PINS_PER_PORT)) ++ if (pin >= MAX_PIN) + return -EINVAL; + if (gpio_request(pin, name)) { + pr_err("failed to setup lantiq gpio: %s\n", name); +@@ -73,12 +79,21 @@ int ltq_gpio_request(unsigned int pin, unsigned int alt0, + else + ltq_gpio_clearbit(ltq_gpio_port[id].membase, + LTQ_GPIO_ALTSEL0, pin); +- if (alt1) +- ltq_gpio_setbit(ltq_gpio_port[id].membase, +- LTQ_GPIO_ALTSEL1, pin); +- else +- ltq_gpio_clearbit(ltq_gpio_port[id].membase, +- LTQ_GPIO_ALTSEL1, pin); ++ if (id == 3) { ++ if (alt1) ++ ltq_gpio_setbit(ltq_gpio_port[1].membase, ++ LTQ_GPIO3_ALTSEL1, pin); ++ else ++ ltq_gpio_clearbit(ltq_gpio_port[1].membase, ++ LTQ_GPIO3_ALTSEL1, pin); ++ } else { ++ if (alt1) ++ ltq_gpio_setbit(ltq_gpio_port[id].membase, ++ LTQ_GPIO_ALTSEL1, pin); ++ else ++ ltq_gpio_clearbit(ltq_gpio_port[id].membase, ++ LTQ_GPIO_ALTSEL1, pin); ++ } + return 0; + } + EXPORT_SYMBOL(ltq_gpio_request); +@@ -104,7 +119,11 @@ static int ltq_gpio_direction_input(struct gpio_chip *chip, unsigned int offset) + { + struct ltq_gpio *ltq_gpio = container_of(chip, struct ltq_gpio, chip); + +- ltq_gpio_clearbit(ltq_gpio->membase, LTQ_GPIO_OD, offset); ++ if (chip->ngpio == PINS_PORT3) ++ ltq_gpio_clearbit(ltq_gpio_port[0].membase, ++ LTQ_GPIO3_OD, offset); ++ else ++ ltq_gpio_clearbit(ltq_gpio->membase, LTQ_GPIO_OD, offset); + ltq_gpio_clearbit(ltq_gpio->membase, LTQ_GPIO_DIR, offset); + + return 0; +@@ -115,7 +134,10 @@ static int ltq_gpio_direction_output(struct gpio_chip *chip, + { + struct ltq_gpio *ltq_gpio = container_of(chip, struct ltq_gpio, chip); + +- ltq_gpio_setbit(ltq_gpio->membase, LTQ_GPIO_OD, offset); ++ if (chip->ngpio == PINS_PORT3) ++ ltq_gpio_setbit(ltq_gpio_port[0].membase, LTQ_GPIO3_OD, offset); ++ else ++ ltq_gpio_setbit(ltq_gpio->membase, LTQ_GPIO_OD, offset); + ltq_gpio_setbit(ltq_gpio->membase, LTQ_GPIO_DIR, offset); + ltq_gpio_set(chip, offset, value); + +@@ -127,7 +149,11 @@ static int ltq_gpio_req(struct gpio_chip *chip, unsigned offset) + struct ltq_gpio *ltq_gpio = container_of(chip, struct ltq_gpio, chip); + + ltq_gpio_clearbit(ltq_gpio->membase, LTQ_GPIO_ALTSEL0, offset); +- ltq_gpio_clearbit(ltq_gpio->membase, LTQ_GPIO_ALTSEL1, offset); ++ if (chip->ngpio == PINS_PORT3) ++ ltq_gpio_clearbit(ltq_gpio_port[1].membase, ++ LTQ_GPIO3_ALTSEL1, offset); ++ else ++ ltq_gpio_clearbit(ltq_gpio->membase, LTQ_GPIO_ALTSEL1, offset); + return 0; + } + +@@ -140,6 +166,15 @@ static int ltq_gpio_probe(struct platform_device *pdev) + pdev->id); + return -EINVAL; + } ++ ++ /* dirty hack - The registers of port3 are not mapped linearly. ++ Port 3 may only load if Port 1/2 are mapped */ ++ if ((pdev->id == 3) && (!ltq_gpio_port[1].membase || !ltq_gpio_port[2].membase)) { ++ dev_err(&pdev->dev, ++ "ports 1/2 need to be loaded before port 3 works\n"); ++ return -ENOMEM; ++ } ++ + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "failed to get memory for gpio port %d\n", +@@ -169,7 +204,10 @@ static int ltq_gpio_probe(struct platform_device *pdev) + ltq_gpio_port[pdev->id].chip.set = ltq_gpio_set; + ltq_gpio_port[pdev->id].chip.request = ltq_gpio_req; + ltq_gpio_port[pdev->id].chip.base = PINS_PER_PORT * pdev->id; +- ltq_gpio_port[pdev->id].chip.ngpio = PINS_PER_PORT; ++ if (pdev->id == 3) ++ ltq_gpio_port[pdev->id].chip.ngpio = PINS_PORT3; ++ else ++ ltq_gpio_port[pdev->id].chip.ngpio = PINS_PER_PORT; + platform_set_drvdata(pdev, <q_gpio_port[pdev->id]); + return gpiochip_add(<q_gpio_port[pdev->id].chip); + } +diff --git a/arch/mips/lantiq/xway/gpio_ebu.c b/arch/mips/lantiq/xway/gpio_ebu.c +index a479355..729f8e3 100644 +--- a/arch/mips/lantiq/xway/gpio_ebu.c ++++ b/arch/mips/lantiq/xway/gpio_ebu.c +@@ -61,9 +61,8 @@ static struct gpio_chip ltq_ebu_chip = { + .label = "ltq_ebu", + .direction_output = ltq_ebu_direction_output, + .set = ltq_ebu_set, +- .base = 72, ++ .base = 100, + .ngpio = 16, +- .can_sleep = 1, + .owner = THIS_MODULE, + }; + +diff --git a/arch/mips/lantiq/xway/gpio_stp.c b/arch/mips/lantiq/xway/gpio_stp.c +index 67d59d6..c01294e 100644 +--- a/arch/mips/lantiq/xway/gpio_stp.c ++++ b/arch/mips/lantiq/xway/gpio_stp.c +@@ -70,9 +70,8 @@ static struct gpio_chip ltq_stp_chip = { + .label = "ltq_stp", + .direction_output = ltq_stp_direction_output, + .set = ltq_stp_set, +- .base = 48, ++ .base = 200, + .ngpio = 24, +- .can_sleep = 1, + .owner = THIS_MODULE, + }; + +-- +1.7.5.4 + |