diff options
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-hisi.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/i2c/busses/i2c-hisi.c b/drivers/i2c/busses/i2c-hisi.c index bcc97e4fcb65..8c6c7075c765 100644 --- a/drivers/i2c/busses/i2c-hisi.c +++ b/drivers/i2c/busses/i2c-hisi.c @@ -7,6 +7,7 @@ #include <linux/bits.h> #include <linux/bitfield.h> +#include <linux/clk.h> #include <linux/completion.h> #include <linux/i2c.h> #include <linux/interrupt.h> @@ -88,6 +89,7 @@ struct hisi_i2c_controller { struct i2c_adapter adapter; void __iomem *iobase; struct device *dev; + struct clk *clk; int irq; /* Intermediates for recording the transfer process */ @@ -454,10 +456,15 @@ static int hisi_i2c_probe(struct platform_device *pdev) return ret; } - ret = device_property_read_u64(dev, "clk_rate", &clk_rate_hz); - if (ret) { - dev_err(dev, "failed to get clock frequency, ret = %d\n", ret); - return ret; + ctlr->clk = devm_clk_get_optional_enabled(&pdev->dev, NULL); + if (IS_ERR_OR_NULL(ctlr->clk)) { + ret = device_property_read_u64(dev, "clk_rate", &clk_rate_hz); + if (ret) { + dev_err(dev, "failed to get clock frequency, ret = %d\n", ret); + return ret; + } + } else { + clk_rate_hz = clk_get_rate(ctlr->clk); } ctlr->clk_rate_khz = DIV_ROUND_UP_ULL(clk_rate_hz, HZ_PER_KHZ); |