diff options
| author | Jonathan Cameron <jic23@cam.ac.uk> | 2008-10-03 15:07:36 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2008-10-03 15:57:06 +0100 |
| commit | c46c948260f41af18b277c1eb1895d788d3605dc (patch) | |
| tree | f073823d5b3dab9cb02d231dcce591343759fa8d | |
| parent | 73b610affe0b24ecb808ef68a1b0a436a4cf7bd5 (diff) | |
[ARM] 5278/1: i2c-pxa fast mode support
Add fast_mode option to i2c_pxa_platform_data and use it to set the
ICR_FM bit appropriately when i2c_pxa_reset is called. Parameter
called fast_mode rather than frequency as this driver is also used
for the i2c_pxa_pwr bus which has different normal and fast frequencies.
Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Acked-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| -rw-r--r-- | arch/arm/mach-pxa/include/mach/i2c.h | 3 | ||||
| -rw-r--r-- | arch/arm/mach-pxa/include/mach/pxa-regs.h | 1 | ||||
| -rw-r--r-- | drivers/i2c/busses/i2c-pxa.c | 6 |
3 files changed, 7 insertions, 3 deletions
diff --git a/arch/arm/mach-pxa/include/mach/i2c.h b/arch/arm/mach-pxa/include/mach/i2c.h index 897e7175217..1a9f65e6ec0 100644 --- a/arch/arm/mach-pxa/include/mach/i2c.h +++ b/arch/arm/mach-pxa/include/mach/i2c.h @@ -65,7 +65,8 @@ struct i2c_pxa_platform_data { unsigned int slave_addr; struct i2c_slave_client *slave; unsigned int class; - int use_pio; + unsigned int use_pio :1; + unsigned int fast_mode :1; }; extern void pxa_set_i2c_info(struct i2c_pxa_platform_data *info); diff --git a/arch/arm/mach-pxa/include/mach/pxa-regs.h b/arch/arm/mach-pxa/include/mach/pxa-regs.h index 12288ca3cbb..772c67635e2 100644 --- a/arch/arm/mach-pxa/include/mach/pxa-regs.h +++ b/arch/arm/mach-pxa/include/mach/pxa-regs.h @@ -448,6 +448,7 @@ #define ICR_ALDIE (1 << 12) /* enable arbitration interrupt */ #define ICR_SADIE (1 << 13) /* slave address detected int enable */ #define ICR_UR (1 << 14) /* unit reset */ +#define ICR_FM (1 << 15) /* fast mode */ #define ISR_RWM (1 << 0) /* read/write mode */ #define ISR_ACKNAK (1 << 1) /* ack/nak status */ diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c index 518b57c795c..8b38ed0379d 100644 --- a/drivers/i2c/busses/i2c-pxa.c +++ b/drivers/i2c/busses/i2c-pxa.c @@ -66,7 +66,8 @@ struct pxa_i2c { unsigned long iosize; int irq; - int use_pio; + unsigned int use_pio :1; + unsigned int fast_mode :1; }; #define _IBMR(i2c) ((i2c)->reg_base + (0x0 << (i2c)->reg_shift)) @@ -366,7 +367,7 @@ static void i2c_pxa_reset(struct pxa_i2c *i2c) writel(i2c->slave_addr, _ISAR(i2c)); /* set control register values */ - writel(I2C_ICR_INIT, _ICR(i2c)); + writel(I2C_ICR_INIT | (i2c->fast_mode ? ICR_FM : 0), _ICR(i2c)); #ifdef CONFIG_I2C_PXA_SLAVE dev_info(&i2c->adap.dev, "Enabling slave mode\n"); @@ -1010,6 +1011,7 @@ static int i2c_pxa_probe(struct platform_device *dev) if (plat) { i2c->adap.class = plat->class; i2c->use_pio = plat->use_pio; + i2c->fast_mode = plat->fast_mode; } if (i2c->use_pio) { |