diff options
Diffstat (limited to 'drivers/i2c/busses/i2c-rcar.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-rcar.c | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c index 2c2fd7c2b11..0282d4d4280 100644 --- a/drivers/i2c/busses/i2c-rcar.c +++ b/drivers/i2c/busses/i2c-rcar.c @@ -26,7 +26,6 @@ #include <linux/clk.h> #include <linux/delay.h> #include <linux/err.h> -#include <linux/init.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/i2c.h> @@ -111,6 +110,7 @@ struct rcar_i2c_priv { void __iomem *io; struct i2c_adapter adap; struct i2c_msg *msg; + struct clk *clk; spinlock_t lock; wait_queue_head_t wait; @@ -227,18 +227,12 @@ static int rcar_i2c_clock_calculate(struct rcar_i2c_priv *priv, u32 bus_speed, struct device *dev) { - struct clk *clkp = clk_get(dev, NULL); u32 scgd, cdf; u32 round, ick; u32 scl; u32 cdf_width; unsigned long rate; - if (IS_ERR(clkp)) { - dev_err(dev, "couldn't get clock\n"); - return PTR_ERR(clkp); - } - switch (priv->devtype) { case I2C_RCAR_GEN1: cdf_width = 2; @@ -266,7 +260,7 @@ static int rcar_i2c_clock_calculate(struct rcar_i2c_priv *priv, * clkp : peripheral_clk * F[] : integer up-valuation */ - rate = clk_get_rate(clkp); + rate = clk_get_rate(priv->clk); cdf = rate / 20000000; if (cdf >= 1 << cdf_width) { dev_err(dev, "Input clock %lu too high\n", rate); @@ -308,7 +302,7 @@ static int rcar_i2c_clock_calculate(struct rcar_i2c_priv *priv, scgd_find: dev_dbg(dev, "clk %d/%d(%lu), round %u, CDF:0x%x, SCGD: 0x%x\n", - scl, bus_speed, clk_get_rate(clkp), round, cdf, scgd); + scl, bus_speed, clk_get_rate(priv->clk), round, cdf, scgd); /* * keep icccr value @@ -604,7 +598,7 @@ static int rcar_i2c_master_xfer(struct i2c_adapter *adap, * error handling */ if (rcar_i2c_flags_has(priv, ID_NACK)) { - ret = -EREMOTEIO; + ret = -ENXIO; break; } @@ -623,7 +617,7 @@ static int rcar_i2c_master_xfer(struct i2c_adapter *adap, pm_runtime_put(dev); - if (ret < 0) + if (ret < 0 && ret != -ENXIO) dev_err(dev, "error %d : %x\n", ret, priv->flags); return ret; @@ -664,6 +658,12 @@ static int rcar_i2c_probe(struct platform_device *pdev) return -ENOMEM; } + priv->clk = devm_clk_get(dev, NULL); + if (IS_ERR(priv->clk)) { + dev_err(dev, "cannot get clock\n"); + return PTR_ERR(priv->clk); + } + bus_speed = 100000; /* default 100 kHz */ ret = of_property_read_u32(dev->of_node, "clock-frequency", &bus_speed); if (ret < 0 && pdata && pdata->bus_speed) |