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Openwrt/target/linux/lantiq/patches-3.2/0021-MIPS-lantiq-use-devres-managed-gpios.patch
Jonas Gorski ee4c47a134 kernel: update linux 3.2 to 3.2.15 
SVN-Revision: 31335
2012-04-17 12:50:54 +00:00

260 lines
8.8 KiB
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From 20ed991ce59030544426dc3422da7ee76667537b Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Thu, 8 Mar 2012 08:37:25 +0100
Subject: [PATCH 21/73] MIPS: lantiq: use devres managed gpios
3.2 introduced devm_request_gpio() to allow managed gpios.
The devres api requires a struct device pointer to work. Add a parameter to ltq_gpio_request()
so that managed gpios can work.
Signed-off-by: John Crispin <blogic@openwrt.org>
---
.../include/asm/mach-lantiq/falcon/lantiq_soc.h | 4 +---
arch/mips/include/asm/mach-lantiq/lantiq.h | 4 ++++
.../mips/include/asm/mach-lantiq/xway/lantiq_soc.h | 3 ---
arch/mips/lantiq/falcon/gpio.c | 4 ++--
arch/mips/lantiq/falcon/prom.c | 7 -------
arch/mips/lantiq/xway/gpio.c | 4 ++--
arch/mips/lantiq/xway/gpio_stp.c | 13 ++++++++-----
arch/mips/pci/pci-lantiq.c | 18 ++++++++++--------
drivers/net/ethernet/lantiq_etop.c | 9 ++++++---
drivers/tty/serial/lantiq.c | 12 ++++++++++++
10 files changed, 45 insertions(+), 33 deletions(-)
--- a/arch/mips/include/asm/mach-lantiq/falcon/lantiq_soc.h
+++ b/arch/mips/include/asm/mach-lantiq/falcon/lantiq_soc.h
@@ -126,9 +126,7 @@ extern __iomem void *ltq_sys1_membase;
#define ltq_sys1_w32_mask(clear, set, reg) \
ltq_sys1_w32((ltq_sys1_r32(reg) & ~(clear)) | (set), reg)
-/* gpio_request wrapper to help configure the pin */
-extern int ltq_gpio_request(unsigned int pin, unsigned int mux,
- unsigned int dir, const char *name);
+/* gpio wrapper to help configure the pin muxing */
extern int ltq_gpio_mux_set(unsigned int pin, unsigned int mux);
/* to keep the irq code generic we need to define these to 0 as falcon
--- a/arch/mips/include/asm/mach-lantiq/lantiq.h
+++ b/arch/mips/include/asm/mach-lantiq/lantiq.h
@@ -37,6 +37,10 @@ extern unsigned int ltq_get_soc_type(voi
/* spinlock all ebu i/o */
extern spinlock_t ebu_lock;
+/* request a non-gpio and set the PIO config */
+extern int ltq_gpio_request(struct device *dev, unsigned int pin,
+ unsigned int mux, unsigned int dir, const char *name);
+
/* some irq helpers */
extern void ltq_disable_irq(struct irq_data *data);
extern void ltq_mask_and_ack_irq(struct irq_data *data);
--- a/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
+++ b/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
@@ -145,9 +145,6 @@
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 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/falcon/gpio.c
+++ b/arch/mips/lantiq/falcon/gpio.c
@@ -97,7 +97,7 @@ int ltq_gpio_mux_set(unsigned int pin, u
}
EXPORT_SYMBOL(ltq_gpio_mux_set);
-int ltq_gpio_request(unsigned int pin, unsigned int mux,
+int ltq_gpio_request(struct device *dev, unsigned int pin, unsigned int mux,
unsigned int dir, const char *name)
{
int port = pin / 100;
@@ -106,7 +106,7 @@ int ltq_gpio_request(unsigned int pin, u
if (offset >= PINS_PER_PORT || port >= MAX_PORTS)
return -EINVAL;
- if (gpio_request(pin, name)) {
+ if (devm_gpio_request(dev, pin, name)) {
pr_err("failed to setup lantiq gpio: %s\n", name);
return -EBUSY;
}
--- a/arch/mips/lantiq/falcon/prom.c
+++ b/arch/mips/lantiq/falcon/prom.c
@@ -27,9 +27,6 @@
#define TYPE_SHIFT 26
#define TYPE_MASK 0x3C000000
-#define MUXC_SIF_RX_PIN 112
-#define MUXC_SIF_TX_PIN 113
-
/* this parameter allows us enable/disable asc1 via commandline */
static int register_asc1;
static int __init
@@ -48,10 +45,6 @@ ltq_soc_setup(void)
falcon_register_gpio();
if (register_asc1) {
ltq_register_asc(1);
- if (ltq_gpio_request(MUXC_SIF_RX_PIN, 3, 0, "asc1-rx"))
- pr_err("failed to request asc1-rx");
- if (ltq_gpio_request(MUXC_SIF_TX_PIN, 3, 1, "asc1-tx"))
- pr_err("failed to request asc1-tx");
ltq_sysctl_activate(SYSCTL_SYS1, ACTS_ASC1_ACT);
}
}
--- a/arch/mips/lantiq/xway/gpio.c
+++ b/arch/mips/lantiq/xway/gpio.c
@@ -50,14 +50,14 @@ int irq_to_gpio(unsigned int gpio)
}
EXPORT_SYMBOL(irq_to_gpio);
-int ltq_gpio_request(unsigned int pin, unsigned int mux,
+int ltq_gpio_request(struct device *dev, unsigned int pin, unsigned int mux,
unsigned int dir, const char *name)
{
int id = 0;
if (pin >= (MAX_PORTS * PINS_PER_PORT))
return -EINVAL;
- if (gpio_request(pin, name)) {
+ if (devm_gpio_request(dev, pin, name)) {
pr_err("failed to setup lantiq gpio: %s\n", name);
return -EBUSY;
}
--- a/arch/mips/lantiq/xway/gpio_stp.c
+++ b/arch/mips/lantiq/xway/gpio_stp.c
@@ -80,11 +80,6 @@ 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, 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);
ltq_stp_w32(0, LTQ_STP_CPU0);
@@ -133,6 +128,14 @@ static int __devinit ltq_stp_probe(struc
dev_err(&pdev->dev, "failed to remap STP memory\n");
return -ENOMEM;
}
+
+ /* the 3 pins used to control the external stp */
+ if (ltq_gpio_request(&pdev->dev, 4, 2, 1, "stp-st") ||
+ ltq_gpio_request(&pdev->dev, 5, 2, 1, "stp-d") ||
+ ltq_gpio_request(&pdev->dev, 6, 2, 1, "stp-sh")) {
+ dev_err(&pdev->dev, "failed to request needed gpios\n");
+ return -EBUSY;
+ }
ret = gpiochip_add(&ltq_stp_chip);
if (!ret)
ret = ltq_stp_hw_init();
--- a/arch/mips/pci/pci-lantiq.c
+++ b/arch/mips/pci/pci-lantiq.c
@@ -150,24 +150,26 @@ static u32 ltq_calc_bar11mask(void)
return bar11mask;
}
-static void ltq_pci_setup_gpio(int gpio)
+static void ltq_pci_setup_gpio(struct device *dev)
{
+ struct ltq_pci_data *conf = (struct ltq_pci_data *) dev->platform_data;
int i;
for (i = 0; i < ARRAY_SIZE(ltq_pci_gpio_map); i++) {
- if (gpio & (1 << i)) {
- ltq_gpio_request(ltq_pci_gpio_map[i].pin,
+ if (conf->gpio & (1 << i)) {
+ ltq_gpio_request(dev, ltq_pci_gpio_map[i].pin,
ltq_pci_gpio_map[i].mux,
ltq_pci_gpio_map[i].dir,
ltq_pci_gpio_map[i].name);
}
}
- ltq_gpio_request(21, 0, 1, "pci-reset");
- ltq_pci_req_mask = (gpio >> PCI_REQ_SHIFT) & PCI_REQ_MASK;
+ ltq_gpio_request(dev, 21, 0, 1, "pci-reset");
+ ltq_pci_req_mask = (conf->gpio >> PCI_REQ_SHIFT) & PCI_REQ_MASK;
}
-static int __devinit ltq_pci_startup(struct ltq_pci_data *conf)
+static int __devinit ltq_pci_startup(struct device *dev)
{
u32 temp_buffer;
+ struct ltq_pci_data *conf = (struct ltq_pci_data *) dev->platform_data;
/* set clock to 33Mhz */
if (ltq_is_ar9()) {
@@ -190,7 +192,7 @@ static int __devinit ltq_pci_startup(str
}
/* setup pci clock and gpis used by pci */
- ltq_pci_setup_gpio(conf->gpio);
+ ltq_pci_setup_gpio(dev);
/* enable auto-switching between PCI and EBU */
ltq_pci_w32(0xa, PCI_CR_CLK_CTRL);
@@ -275,7 +277,7 @@ static int __devinit ltq_pci_probe(struc
ioremap_nocache(LTQ_PCI_CFG_BASE, LTQ_PCI_CFG_BASE);
ltq_pci_controller.io_map_base =
(unsigned long)ioremap(LTQ_PCI_IO_BASE, LTQ_PCI_IO_SIZE - 1);
- ltq_pci_startup(ltq_pci_data);
+ ltq_pci_startup(&pdev->dev);
register_pci_controller(&ltq_pci_controller);
return 0;
--- a/drivers/net/ethernet/lantiq_etop.c
+++ b/drivers/net/ethernet/lantiq_etop.c
@@ -291,9 +291,6 @@ ltq_etop_gbit_init(void)
{
ltq_pmu_enable(PMU_SWITCH);
- ltq_gpio_request(42, 2, 1, "MDIO");
- ltq_gpio_request(43, 2, 1, "MDC");
-
ltq_gbit_w32_mask(0, GCTL0_SE, LTQ_GBIT_GCTL0);
/** Disable MDIO auto polling mode */
ltq_gbit_w32_mask(0, PX_CTL_DMDIO, LTQ_GBIT_P0_CTL);
@@ -868,6 +865,12 @@ ltq_etop_probe(struct platform_device *p
err = -ENOMEM;
goto err_out;
}
+ if (ltq_gpio_request(&pdev->dev, 42, 2, 1, "MDIO") ||
+ ltq_gpio_request(&pdev->dev, 43, 2, 1, "MDC")) {
+ dev_err(&pdev->dev, "failed to request MDIO gpios\n");
+ err = -EBUSY;
+ goto err_out;
+ }
}
dev = alloc_etherdev_mq(sizeof(struct ltq_etop_priv), 4);
--- a/drivers/tty/serial/lantiq.c
+++ b/drivers/tty/serial/lantiq.c
@@ -107,6 +107,9 @@
#define ASCFSTAT_TXFREEMASK 0x3F000000
#define ASCFSTAT_TXFREEOFF 24
+#define MUXC_SIF_RX_PIN 112
+#define MUXC_SIF_TX_PIN 113
+
static void lqasc_tx_chars(struct uart_port *port);
static struct ltq_uart_port *lqasc_port[MAXPORTS];
static struct uart_driver lqasc_reg;
@@ -529,6 +532,15 @@ lqasc_request_port(struct uart_port *por
if (port->membase == NULL)
return -ENOMEM;
}
+ if (ltq_is_falcon() && (port->line == 1)) {
+ struct ltq_uart_port *ltq_port = lqasc_port[pdev->id];
+ if (ltq_gpio_request(&pdev->dev, MUXC_SIF_RX_PIN,
+ 3, 0, "asc1-rx"))
+ return -EBUSY;
+ if (ltq_gpio_request(&pdev->dev, MUXC_SIF_TX_PIN,
+ 3, 1, "asc1-tx"))
+ return -EBUSY;
+ }
return 0;
}
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