summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-ep93xx/core.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mach-ep93xx/core.c')
-rw-r--r--arch/arm/mach-ep93xx/core.c41
1 files changed, 23 insertions, 18 deletions
diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c
index f53c61813998..e70feec6fad5 100644
--- a/arch/arm/mach-ep93xx/core.c
+++ b/arch/arm/mach-ep93xx/core.c
@@ -31,7 +31,7 @@
#include <linux/amba/serial.h>
#include <linux/mtd/physmap.h>
#include <linux/i2c.h>
-#include <linux/i2c-gpio.h>
+#include <linux/gpio/machine.h>
#include <linux/spi/spi.h>
#include <linux/export.h>
#include <linux/irqchip/arm-vic.h>
@@ -320,42 +320,47 @@ void __init ep93xx_register_eth(struct ep93xx_eth_data *data, int copy_addr)
/*************************************************************************
* EP93xx i2c peripheral handling
*************************************************************************/
-static struct i2c_gpio_platform_data ep93xx_i2c_data;
+
+/* All EP93xx devices use the same two GPIO pins for I2C bit-banging */
+static struct gpiod_lookup_table ep93xx_i2c_gpiod_table = {
+ .dev_id = "i2c-gpio",
+ .table = {
+ /* Use local offsets on gpiochip/port "G" */
+ GPIO_LOOKUP_IDX("G", 1, NULL, 0,
+ GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+ GPIO_LOOKUP_IDX("G", 0, NULL, 1,
+ GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+ },
+};
static struct platform_device ep93xx_i2c_device = {
.name = "i2c-gpio",
.id = 0,
.dev = {
- .platform_data = &ep93xx_i2c_data,
+ .platform_data = NULL,
},
};
/**
* ep93xx_register_i2c - Register the i2c platform device.
- * @data: platform specific i2c-gpio configuration (__initdata)
* @devices: platform specific i2c bus device information (__initdata)
* @num: the number of devices on the i2c bus
*/
-void __init ep93xx_register_i2c(struct i2c_gpio_platform_data *data,
- struct i2c_board_info *devices, int num)
+void __init ep93xx_register_i2c(struct i2c_board_info *devices, int num)
{
/*
- * Set the EEPROM interface pin drive type control.
- * Defines the driver type for the EECLK and EEDAT pins as either
- * open drain, which will require an external pull-up, or a normal
- * CMOS driver.
+ * FIXME: this just sets the two pins as non-opendrain, as no
+ * platforms tries to do that anyway. Flag the applicable lines
+ * as open drain in the GPIO_LOOKUP above and the driver or
+ * gpiolib will handle open drain/open drain emulation as need
+ * be. Right now i2c-gpio emulates open drain which is not
+ * optimal.
*/
- if (data->sda_is_open_drain && data->sda_pin != EP93XX_GPIO_LINE_EEDAT)
- pr_warning("sda != EEDAT, open drain has no effect\n");
- if (data->scl_is_open_drain && data->scl_pin != EP93XX_GPIO_LINE_EECLK)
- pr_warning("scl != EECLK, open drain has no effect\n");
-
- __raw_writel((data->sda_is_open_drain << 1) |
- (data->scl_is_open_drain << 0),
+ __raw_writel((0 << 1) | (0 << 0),
EP93XX_GPIO_EEDRIVE);
- ep93xx_i2c_data = *data;
i2c_register_board_info(0, devices, num);
+ gpiod_add_lookup_table(&ep93xx_i2c_gpiod_table);
platform_device_register(&ep93xx_i2c_device);
}