qe_gpio_set_dedicated() is a platform specific function, which is used
to revert a pin to a dedicated function. Caller should have already
obtained the gpio via gpio_request().
This is needed to support Freescale USB Host Controller.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
---
arch/powerpc/include/asm/qe.h | 1 +
arch/powerpc/sysdev/qe_lib/gpio.c | 46 +++++++++++++++++++++++++++++++++++++
2 files changed, 47 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/include/asm/qe.h b/arch/powerpc/include/asm/qe.h
index edee15d..c926147 100644
--- a/arch/powerpc/include/asm/qe.h
+++ b/arch/powerpc/include/asm/qe.h
@@ -111,6 +111,7 @@ extern void __par_io_config_pin(struct qe_pio_regs __iomem *par_io, u8 pin,
extern int par_io_config_pin(u8 port, u8 pin, int dir, int open_drain,
int assignment, int has_irq);
extern int par_io_data_set(u8 port, u8 pin, u8 val);
+extern int qe_gpio_set_dedicated(unsigned int gpio);
/* QE internal API */
int qe_issue_cmd(u32 cmd, u32 device, u8 mcn_protocol, u32 cmd_input);
diff --git a/arch/powerpc/sysdev/qe_lib/gpio.c b/arch/powerpc/sysdev/qe_lib/gpio.c
index 8e5a0bc..bd7278f 100644
--- a/arch/powerpc/sysdev/qe_lib/gpio.c
+++ b/arch/powerpc/sysdev/qe_lib/gpio.c
@@ -26,6 +26,9 @@ struct qe_gpio_chip {
/* shadowed data register to clear/set bits safely */
u32 cpdata;
+
+ /* saved_regs used to restore dedicated functions */
+ struct qe_pio_regs saved_regs;
};
static inline struct qe_gpio_chip *
@@ -40,6 +43,12 @@ static void qe_gpio_save_regs(struct of_mm_gpio_chip *mm_gc)
struct qe_pio_regs __iomem *regs = mm_gc->regs;
qe_gc->cpdata = in_be32(&regs->cpdata);
+ qe_gc->saved_regs.cpdata = qe_gc->cpdata;
+ qe_gc->saved_regs.cpdir1 = in_be32(&regs->cpdir1);
+ qe_gc->saved_regs.cpdir2 = in_be32(&regs->cpdir2);
+ qe_gc->saved_regs.cppar1 = in_be32(&regs->cppar1);
+ qe_gc->saved_regs.cppar2 = in_be32(&regs->cppar2);
+ qe_gc->saved_regs.cpodr = in_be32(&regs->cpodr);
}
static ...
