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authorBryan Wu <cooloney@kernel.org>2008-04-22 22:16:48 +0200
committerJean Delvare <khali@hyperion.delvare>2008-04-22 22:16:48 +0200
commit74d362e0b3afb7a324855ab9675eb6cda78fda8c (patch)
tree6570f1c56c28aac8d3bb55e06efbf5a82ab5aef0 /drivers/i2c
parentaa3d02091747727f7ff2e1f2455ad8363a9e6946 (diff)
i2c-bfin-twi: Add missing pin mux operation
Blackfin TWI controller hardware pin should be requested from GPIO port controller Before BF54x, there is no need to do this. But as long as BF54x and BF52x are supported by this generic driver, the missing pin mux operation should be added. Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'drivers/i2c')
-rw-r--r--drivers/i2c/busses/i2c-bfin-twi.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/i2c/busses/i2c-bfin-twi.c b/drivers/i2c/busses/i2c-bfin-twi.c
index f2b558f17ca..446b4f855b0 100644
--- a/drivers/i2c/busses/i2c-bfin-twi.c
+++ b/drivers/i2c/busses/i2c-bfin-twi.c
@@ -34,6 +34,7 @@
#include <linux/platform_device.h>
#include <asm/blackfin.h>
+#include <asm/portmux.h>
#include <asm/irq.h>
#define POLL_TIMEOUT (2 * HZ)
@@ -89,6 +90,11 @@ DEFINE_TWI_REG(XMT_DATA16, 0x84)
DEFINE_TWI_REG(RCV_DATA8, 0x88)
DEFINE_TWI_REG(RCV_DATA16, 0x8C)
+static const u16 pin_req[2][3] = {
+ {P_TWI0_SCL, P_TWI0_SDA, 0},
+ {P_TWI1_SCL, P_TWI1_SDA, 0},
+};
+
static void bfin_twi_handle_interrupt(struct bfin_twi_iface *iface)
{
unsigned short twi_int_status = read_INT_STAT(iface);
@@ -653,6 +659,12 @@ static int i2c_bfin_twi_probe(struct platform_device *pdev)
p_adap->class = I2C_CLASS_ALL;
p_adap->dev.parent = &pdev->dev;
+ rc = peripheral_request_list(pin_req[pdev->id], "i2c-bfin-twi");
+ if (rc) {
+ dev_err(&pdev->dev, "Can't setup pin mux!\n");
+ goto out_error_pin_mux;
+ }
+
rc = request_irq(iface->irq, bfin_twi_interrupt_entry,
IRQF_DISABLED, pdev->name, iface);
if (rc) {
@@ -690,6 +702,8 @@ out_error_add_adapter:
free_irq(iface->irq, iface);
out_error_req_irq:
out_error_no_irq:
+ peripheral_free_list(pin_req[pdev->id]);
+out_error_pin_mux:
iounmap(iface->regs_base);
out_error_ioremap:
out_error_get_res:
@@ -706,6 +720,7 @@ static int i2c_bfin_twi_remove(struct platform_device *pdev)
i2c_del_adapter(&(iface->adap));
free_irq(iface->irq, iface);
+ peripheral_free_list(pin_req[pdev->id]);
iounmap(iface->regs_base);
kfree(iface);