diff options
Diffstat (limited to 'drivers/i2c/busses/i2c-at91.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-at91.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/drivers/i2c/busses/i2c-at91.c b/drivers/i2c/busses/i2c-at91.c index fd059308aff..e95f9ba9679 100644 --- a/drivers/i2c/busses/i2c-at91.c +++ b/drivers/i2c/busses/i2c-at91.c @@ -32,7 +32,7 @@ #include <linux/slab.h> #include <linux/platform_data/dma-atmel.h> -#define TWI_CLK_HZ 100000 /* max 400 Kbits/s */ +#define DEFAULT_TWI_CLK_HZ 100000 /* max 400 Kbits/s */ #define AT91_I2C_TIMEOUT msecs_to_jiffies(100) /* transfer timeout */ #define AT91_I2C_DMA_THRESHOLD 8 /* enable DMA if transfer size is bigger than this threshold */ @@ -371,7 +371,7 @@ static int at91_do_twi_transfer(struct at91_twi_dev *dev) dev_dbg(dev->dev, "transfer: %s %d bytes.\n", (dev->msg->flags & I2C_M_RD) ? "read" : "write", dev->buf_len); - INIT_COMPLETION(dev->cmd_complete); + reinit_completion(&dev->cmd_complete); dev->transfer_status = 0; if (!dev->buf_len) { @@ -589,6 +589,9 @@ static const struct of_device_id atmel_twi_dt_ids[] = { .compatible = "atmel,at91sam9260-i2c", .data = &at91sam9260_config, } , { + .compatible = "atmel,at91sam9261-i2c", + .data = &at91sam9261_config, + } , { .compatible = "atmel,at91sam9g20-i2c", .data = &at91sam9g20_config, } , { @@ -708,6 +711,7 @@ static int at91_twi_probe(struct platform_device *pdev) struct resource *mem; int rc; u32 phy_addr; + u32 bus_clk_rate; dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); if (!dev) @@ -753,13 +757,18 @@ static int at91_twi_probe(struct platform_device *pdev) dev->use_dma = true; } - at91_calc_twi_clock(dev, TWI_CLK_HZ); + rc = of_property_read_u32(dev->dev->of_node, "clock-frequency", + &bus_clk_rate); + if (rc) + bus_clk_rate = DEFAULT_TWI_CLK_HZ; + + at91_calc_twi_clock(dev, bus_clk_rate); at91_init_twi_bus(dev); snprintf(dev->adapter.name, sizeof(dev->adapter.name), "AT91"); i2c_set_adapdata(&dev->adapter, dev); dev->adapter.owner = THIS_MODULE; - dev->adapter.class = I2C_CLASS_HWMON; + dev->adapter.class = I2C_CLASS_HWMON | I2C_CLASS_DEPRECATED; dev->adapter.algo = &at91_twi_algorithm; dev->adapter.dev.parent = dev->dev; dev->adapter.nr = pdev->id; |