This patch adds generic GPIO driver framework support for Marvell SoCs.
To enable GPIO driver define CONFIG_MARVELL_GPIO and for GPIO commands
define CONFIG_CMD_GPIO in your board configuration file.
Signed-off-by: Ajay Bhargav <ajay.bhar...@einfochips.com>
---
drivers/gpio/Makefile | 1 +
drivers/gpio/mvgpio.c | 114 +++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 115 insertions(+), 0 deletions(-)
create mode 100644 drivers/gpio/mvgpio.c
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 62ec97d..beca1da 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -27,6 +27,7 @@ LIB := $(obj)libgpio.o
COBJS-$(CONFIG_AT91_GPIO) += at91_gpio.o
COBJS-$(CONFIG_KIRKWOOD_GPIO) += kw_gpio.o
+COBJS-$(CONFIG_MARVELL_GPIO) += mvgpio.o
COBJS-$(CONFIG_MARVELL_MFP) += mvmfp.o
COBJS-$(CONFIG_MXC_GPIO) += mxc_gpio.o
COBJS-$(CONFIG_PCA953X) += pca953x.o
diff --git a/drivers/gpio/mvgpio.c b/drivers/gpio/mvgpio.c
new file mode 100644
index 0000000..0cc8ed7
--- /dev/null
+++ b/drivers/gpio/mvgpio.c
@@ -0,0 +1,114 @@
+/*
+ * (C) Copyright 2011
+ * eInfochips Ltd. <www.einfochips.com>
+ * Written-by: Ajay Bhargav <ajay.bhar...@einfochips.com>
+ *
+ * (C) Copyright 2010
+ * Marvell Semiconductor <www.marvell.com>
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/errno.h>
+#include <asm/gpio.h>
+
+#ifndef MV_MAX_GPIO
+#define MV_MAX_GPIO 128
+#endif
+
+int gpio_request(int gp, const char *label)
+{
+ if (gp >= MV_MAX_GPIO) {
+ printf("%s: Invalid GPIO requested %d\n", __func__, gp);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+void gpio_free(int gp)
+{
+}
+
+void gpio_toggle_value(int gp)
+{
+ gpio_set_value(gp, !gpio_get_value(gp));
+}
+
+int gpio_direction_input(int gp)
+{
+ struct gpio_reg *gpio_reg_bank;
+
+ if (gp >= MV_MAX_GPIO) {
+ printf("%s: Invalid GPIO %d\n", __func__, gp);
+ return -EINVAL;
+ }
+
+ gpio_reg_bank = get_gpio_base(GPIO_TO_REG(gp));
+ writel(GPIO_TO_BIT(gp), &gpio_reg_bank->gcdr);
+ return 0;
+}
+
+int gpio_direction_output(int gp, int value)
+{
+ struct gpio_reg *gpio_reg_bank;
+
+ if (gp >= MV_MAX_GPIO) {
+ printf("%s: Invalid GPIO %d\n", __func__, gp);
+ return -EINVAL;
+ }
+
+ gpio_reg_bank = get_gpio_base(GPIO_TO_REG(gp));
+ writel(GPIO_TO_BIT(gp), &gpio_reg_bank->gsdr);
+ gpio_set_value(gp, value);
+ return 0;
+}
+
+int gpio_get_value(int gp)
+{
+ struct gpio_reg *gpio_reg_bank;
+ u32 gp_val;
+
+ if (gp >= MV_MAX_GPIO) {
+ printf("%s: Invalid GPIO %d\n", __func__, gp);
+ return -EINVAL;
+ }
+
+ gpio_reg_bank = get_gpio_base(GPIO_TO_REG(gp));
+ gp_val = readl(&gpio_reg_bank->gplr);
+
+ return GPIO_VAL(gp, gp_val);
+}
+
+void gpio_set_value(int gp, int value)
+{
+ struct gpio_reg *gpio_reg_bank;
+
+ if (gp >= MV_MAX_GPIO) {
+ printf("%s: Invalid GPIO %d\n", __func__, gp);
+ return;
+ }
+
+ gpio_reg_bank = get_gpio_base(GPIO_TO_REG(gp));
+ if (value)
+ writel(GPIO_TO_BIT(gp), &gpio_reg_bank->gpsr);
+ else
+ writel(GPIO_TO_BIT(gp), &gpio_reg_bank->gpcr);
+}
--
1.7.0.4
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