diff options
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-meson.c | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/drivers/i2c/busses/i2c-meson.c b/drivers/i2c/busses/i2c-meson.c index 04614a6010d6..a692594fb82c 100644 --- a/drivers/i2c/busses/i2c-meson.c +++ b/drivers/i2c/busses/i2c-meson.c @@ -73,7 +73,6 @@ enum { * @error: Flag set when an error is received * @lock: To avoid race conditions between irq handler and xfer code * @done: Completion used to wait for transfer termination - * @frequency: Operating frequency of I2C bus clock * @tokens: Sequence of tokens to be written to the device * @num_tokens: Number of tokens */ @@ -92,7 +91,6 @@ struct meson_i2c { spinlock_t lock; struct completion done; - unsigned int frequency; u32 tokens[2]; int num_tokens; }; @@ -131,17 +129,17 @@ static void meson_i2c_write_tokens(struct meson_i2c *i2c) writel(i2c->tokens[1], i2c->regs + REG_TOK_LIST1); } -static void meson_i2c_set_clk_div(struct meson_i2c *i2c) +static void meson_i2c_set_clk_div(struct meson_i2c *i2c, unsigned int freq) { unsigned long clk_rate = clk_get_rate(i2c->clk); unsigned int div; - div = DIV_ROUND_UP(clk_rate, i2c->frequency * 4); + div = DIV_ROUND_UP(clk_rate, freq * 4); meson_i2c_set_mask(i2c, REG_CTRL, REG_CTRL_CLKDIV_MASK, div << REG_CTRL_CLKDIV_SHIFT); dev_dbg(i2c->dev, "%s: clk %lu, freq %u, div %u\n", __func__, - clk_rate, i2c->frequency, div); + clk_rate, freq, div); } static void meson_i2c_get_data(struct meson_i2c *i2c, char *buf, int len) @@ -361,7 +359,6 @@ static int meson_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int i, ret = 0, count = 0; clk_enable(i2c->clk); - meson_i2c_set_clk_div(i2c); for (i = 0; i < num; i++) { ret = meson_i2c_xfer_msg(i2c, msgs + i, i == num - 1); @@ -390,15 +387,15 @@ static int meson_i2c_probe(struct platform_device *pdev) struct device_node *np = pdev->dev.of_node; struct meson_i2c *i2c; struct resource *mem; + u32 freq; int irq, ret = 0; i2c = devm_kzalloc(&pdev->dev, sizeof(struct meson_i2c), GFP_KERNEL); if (!i2c) return -ENOMEM; - if (of_property_read_u32(pdev->dev.of_node, "clock-frequency", - &i2c->frequency)) - i2c->frequency = DEFAULT_FREQ; + if (of_property_read_u32(pdev->dev.of_node, "clock-frequency", &freq)) + freq = DEFAULT_FREQ; i2c->dev = &pdev->dev; platform_set_drvdata(pdev, i2c); @@ -455,6 +452,8 @@ static int meson_i2c_probe(struct platform_device *pdev) return ret; } + meson_i2c_set_clk_div(i2c, freq); + return 0; } |