[U-Boot] [PATCH 1/2] gpio: add gpio api support to mx27 (v2)

5 Aug 2012

There is a little change on gpio_get_value because
on mx27 the register to read is ssr and not dr.
Signed-off-by: Philippe Reynes tremyfr@yahoo.fr
---
 arch/arm/cpu/arm926ejs/mx27/generic.c     |   11 +++---
 arch/arm/include/asm/arch-mx27/gpio.h     |   55 +++++++++++++++++++++++++++++
 arch/arm/include/asm/arch-mx27/imx-regs.h |   30 ++++------------
 drivers/gpio/mxc_gpio.c                   |   12 +++++--
 4 files changed, 77 insertions(+), 31 deletions(-)
 create mode 100644 arch/arm/include/asm/arch-mx27/gpio.h

diff --git a/arch/arm/cpu/arm926ejs/mx27/generic.c b/arch/arm/cpu/arm926ejs/mx27/generic.c
index 65c4813..41bb84b 100644
--- a/arch/arm/cpu/arm926ejs/mx27/generic.c
+++ b/arch/arm/cpu/arm926ejs/mx27/generic.c
@@ -24,6 +24,7 @@
 #include <asm/io.h>
 #include <asm/arch/imx-regs.h>
 #include <asm/arch/clock.h>
+#include <asm/arch/gpio.h>
 #ifdef CONFIG_MXC_MMC
 #include <asm/arch/mxcmmc.h>
 #endif
@@ -209,7 +210,7 @@ int cpu_mmc_init(bd_t *bis)
void imx_gpio_mode(int gpio_mode)
 {
-	struct gpio_regs *regs = (struct gpio_regs *)IMX_GPIO_BASE;
+	struct gpio_port_regs *regs = (struct gpio_port_regs *)IMX_GPIO_BASE;
    unsigned int pin = gpio_mode & GPIO_PIN_MASK;
    unsigned int port = (gpio_mode & GPIO_PORT_MASK) >> GPIO_PORT_SHIFT;
    unsigned int ocr = (gpio_mode & GPIO_OCR_MASK) >> GPIO_OCR_SHIFT;
@@ -228,11 +229,11 @@ void imx_gpio_mode(int gpio_mode)
/* Data direction */
    if (gpio_mode & GPIO_OUT) {
-		writel(readl(&regs->port[port].ddir) | 1 << pin,
-				&regs->port[port].ddir);
+		writel(readl(&regs->port[port].gpio_dir) | 1 << pin,
+				&regs->port[port].gpio_dir);
    } else {
-		writel(readl(&regs->port[port].ddir) & ~(1 << pin),
-				&regs->port[port].ddir);
+		writel(readl(&regs->port[port].gpio_dir) & ~(1 << pin),
+				&regs->port[port].gpio_dir);
    }
/* Primary / alternate function */
diff --git a/arch/arm/include/asm/arch-mx27/gpio.h b/arch/arm/include/asm/arch-mx27/gpio.h
new file mode 100644
index 0000000..965b584
--- /dev/null
+++ b/arch/arm/include/asm/arch-mx27/gpio.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2012
+ * Philippe Reynes tremyfr@yahoo.fr
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+
+#ifndef __ASM_ARCH_MX27_GPIO_H
+#define __ASM_ARCH_MX27_GPIO_H
+
+/* GPIO registers */
+struct gpio_regs {
+	u32 gpio_dir; /* DDIR */
+	u32 ocr1;
+	u32 ocr2;
+	u32 iconfa1;
+	u32 iconfa2;
+	u32 iconfb1;
+	u32 iconfb2;
+	u32 gpio_dr; /* DR */
+	u32 gius;
+	u32 ssr;
+	u32 icr1;
+	u32 icr2;
+	u32 imr;
+	u32 isr;
+	u32 gpr;
+	u32 swr;
+	u32 puen;
+	u32 res[0x2f];
+};
+
+/* This structure is used by the function imx_gpio_mode */
+struct gpio_port_regs {
+	struct gpio_regs port[6];
+};
+
+#endif
diff --git a/arch/arm/include/asm/arch-mx27/imx-regs.h b/arch/arm/include/asm/arch-mx27/imx-regs.h
index ced5b2a..4035d2b 100644
--- a/arch/arm/include/asm/arch-mx27/imx-regs.h
+++ b/arch/arm/include/asm/arch-mx27/imx-regs.h
@@ -162,29 +162,6 @@ struct gpt_regs {
 #define PORTE 4
 #define PORTF 5
-struct gpio_regs {
-	struct {
-		u32 ddir;
-		u32 ocr1;
-		u32 ocr2;
-		u32 iconfa1;
-		u32 iconfa2;
-		u32 iconfb1;
-		u32 iconfb2;
-		u32 dr;
-		u32 gius;
-		u32 ssr;
-		u32 icr1;
-		u32 icr2;
-		u32 imr;
-		u32 isr;
-		u32 gpr;
-		u32 swr;
-		u32 puen;
-		u32 res[0x2f];
-	} port[6];
-};
-
 /* IIM Control Registers */
 struct iim_regs {
    u32 iim_stat;
@@ -471,6 +448,13 @@ struct fuse_bank0_regs {
 #define TSTAT_CAPT	(1 << 1)	/* Capture event */
 #define TSTAT_COMP	1		/* Compare event */
+#define GPIO1_BASE_ADDR 0x10015000
+#define GPIO2_BASE_ADDR 0x10015100
+#define GPIO3_BASE_ADDR 0x10015200
+#define GPIO4_BASE_ADDR 0x10015300
+#define GPIO5_BASE_ADDR 0x10015400
+#define GPIO6_BASE_ADDR 0x10015500
+
 #define GPIO_PIN_MASK	0x1f
#define GPIO_PORT_SHIFT	5
diff --git a/drivers/gpio/mxc_gpio.c b/drivers/gpio/mxc_gpio.c
index 6615535..4be27af 100644
--- a/drivers/gpio/mxc_gpio.c
+++ b/drivers/gpio/mxc_gpio.c
@@ -41,13 +41,15 @@ static unsigned long gpio_ports[] = {
    [0] = GPIO1_BASE_ADDR,
    [1] = GPIO2_BASE_ADDR,
    [2] = GPIO3_BASE_ADDR,
-#if defined(CONFIG_MX25) || defined(CONFIG_MX51) || defined(CONFIG_MX53) || \
-		defined(CONFIG_MX6Q)
+#if defined(CONFIG_MX25) || defined(CONFIG_MX27) || defined(CONFIG_MX51) || \
+		defined(CONFIG_MX53) || defined(CONFIG_MX6Q)
    [3] = GPIO4_BASE_ADDR,
 #endif
-#if defined(CONFIG_MX53) || defined(CONFIG_MX6Q)
+#if defined(CONFIG_MX27) || defined(CONFIG_MX53) || defined(CONFIG_MX6Q)
    [4] = GPIO5_BASE_ADDR,
    [5] = GPIO6_BASE_ADDR,
+#endif
+#if defined(CONFIG_MX53) || defined(CONFIG_MX6Q)
    [6] = GPIO7_BASE_ADDR,
 #endif
 };
@@ -116,7 +118,11 @@ int gpio_get_value(unsigned gpio)
regs = (struct gpio_regs *)gpio_ports[port];
+#ifndef CONFIG_MX27
    val = (readl(&regs->gpio_dr) >> gpio) & 0x01;
+#else
+	val = (readl(&regs->ssr) >> gpio) & 0x01;
+#endif
return val;
 }
-- 
1.7.4.4


    