The patch titled
sm501: gpio I2C support
has been removed from the -mm tree. Its filename was
sm501-gpio-i2c-support.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: sm501: gpio I2C support
From: Ben Dooks <ben-linux@xxxxxxxxx>
Add support for adding the GPIO based I2C resources.
Signed-off-by: Ben Dooks <ben-linux@xxxxxxxxx>
Cc: Arnaud Patard <apatard@xxxxxxxxxxxx>
Cc: David Brownell <david-b@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/mfd/sm501.c | 76 +++++++++++++++++++++++++++++++++++++++-
include/linux/sm501.h | 10 ++++-
2 files changed, 84 insertions(+), 2 deletions(-)
diff -puN drivers/mfd/sm501.c~sm501-gpio-i2c-support drivers/mfd/sm501.c
--- a/drivers/mfd/sm501.c~sm501-gpio-i2c-support
+++ a/drivers/mfd/sm501.c
@@ -20,6 +20,7 @@
#include <linux/platform_device.h>
#include <linux/pci.h>
#include <linux/gpio.h>
+#include <linux/i2c-gpio.h>
#include <linux/sm501.h>
#include <linux/sm501-regs.h>
@@ -1086,6 +1087,11 @@ static void sm501_gpio_remove(struct sm5
dev_err(sm->dev, "cannot remove high chip, cannot tidy up\n");
}
+static int sm501_gpio_pin2nr(struct sm501_devdata *sm, unsigned int pin)
+{
+ struct sm501_gpio *gpio = &sm->gpio;
+ return pin + (pin < 32) ? gpio->low.gpio.base : gpio->high.gpio.base;
+}
#else
static int sm501_register_gpio(struct sm501_devdata *sm)
{
@@ -1095,8 +1101,66 @@ static int sm501_register_gpio(struct sm
static void sm501_gpio_remove(struct sm501_devdata *sm)
{
}
+
+static int sm501_gpio_pin2nr(struct sm501_devdata *sm, unsigned int pin)
+{
+ return -1;
+}
#endif
+static int sm501_register_gpio_i2c_instance(struct sm501_devdata *sm,
+ struct sm501_platdata_gpio_i2c *iic)
+{
+ struct i2c_gpio_platform_data *icd;
+ struct platform_device *pdev;
+
+ pdev = sm501_create_subdev(sm, "i2c-gpio", 0,
+ sizeof(struct i2c_gpio_platform_data));
+ if (!pdev)
+ return -ENOMEM;
+
+ icd = pdev->dev.platform_data;
+
+ /* We keep the pin_sda and pin_scl fields relative in case the
+ * same platform data is passed to >1 SM501.
+ */
+
+ icd->sda_pin = sm501_gpio_pin2nr(sm, iic->pin_sda);
+ icd->scl_pin = sm501_gpio_pin2nr(sm, iic->pin_scl);
+ icd->timeout = iic->timeout;
+ icd->udelay = iic->udelay;
+
+ /* note, we can't use either of the pin numbers, as the i2c-gpio
+ * driver uses the platform.id field to generate the bus number
+ * to register with the i2c core; The i2c core doesn't have enough
+ * entries to deal with anything we currently use.
+ */
+
+ pdev->id = iic->bus_num;
+
+ dev_info(sm->dev, "registering i2c-%d: sda=%d (%d), scl=%d (%d)\n",
+ iic->bus_num,
+ icd->sda_pin, iic->pin_sda, icd->scl_pin, iic->pin_scl);
+
+ return sm501_register_device(sm, pdev);
+}
+
+static int sm501_register_gpio_i2c(struct sm501_devdata *sm,
+ struct sm501_platdata *pdata)
+{
+ struct sm501_platdata_gpio_i2c *iic = pdata->gpio_i2c;
+ int index;
+ int ret;
+
+ for (index = 0; index < pdata->gpio_i2c_nr; index++, iic++) {
+ ret = sm501_register_gpio_i2c_instance(sm, iic);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
/* sm501_dbg_regs
*
* Debug attribute to attach to parent device to show core registers
@@ -1204,6 +1268,7 @@ static unsigned int sm501_mem_local[] =
static int sm501_init_dev(struct sm501_devdata *sm)
{
struct sm501_initdata *idata;
+ struct sm501_platdata *pdata;
resource_size_t mem_avail;
unsigned long dramctrl;
unsigned long devid;
@@ -1242,7 +1307,9 @@ static int sm501_init_dev(struct sm501_d
/* check to see if we have some device initialisation */
- idata = sm->platdata ? sm->platdata->init : NULL;
+ pdata = sm->platdata;
+ idata = pdata ? pdata->init : NULL;
+
if (idata) {
sm501_init_regs(sm, idata);
@@ -1254,6 +1321,13 @@ static int sm501_init_dev(struct sm501_d
sm501_register_gpio(sm);
}
+ if (pdata->gpio_i2c != NULL && pdata->gpio_i2c_nr > 0) {
+ if (!sm->gpio.registered)
+ dev_err(sm->dev, "no gpio registered for i2c gpio.\n");
+ else
+ sm501_register_gpio_i2c(sm, pdata);
+ }
+
ret = sm501_check_clocks(sm);
if (ret) {
dev_err(sm->dev, "M1X and M clocks sourced from different "
diff -puN include/linux/sm501.h~sm501-gpio-i2c-support include/linux/sm501.h
--- a/include/linux/sm501.h~sm501-gpio-i2c-support
+++ a/include/linux/sm501.h
@@ -86,11 +86,19 @@ struct sm501_platdata_fb {
struct sm501_platdata_fbsub *fb_pnl;
};
-/* gpio i2c */
+/* gpio i2c
+ *
+ * Note, we have to pass in the bus number, as the number used will be
+ * passed to the i2c-gpio driver's platform_device.id, subsequently used
+ * to register the i2c bus.
+*/
struct sm501_platdata_gpio_i2c {
+ unsigned int bus_num;
unsigned int pin_sda;
unsigned int pin_scl;
+ int udelay;
+ int timeout;
};
/* sm501_initdata
_
Patches currently in -mm which might be from ben-linux@xxxxxxxxx are
origin.patch
linux-next.patch
resource-add-resource_size.patch
resource-add-resource_type-and-ioresource_type_bits.patch
resource-add-new-ioresource_clk-type-v2.patch
i2c-sh_mobile-ioresource_clk-support.patch
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