diff options
| author | Phil Edworthy <phil.edworthy@renesas.com> | 2019-02-28 13:52:10 +0000 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2019-03-20 17:57:18 +0100 |
| commit | c62ebb3d5f0d0e9dafe990c9ce680ca9b46fd4c1 (patch) | |
| tree | 2f3d3a2dcbbda1b6fcd46b9fe193071641d2d0f4 /drivers/i2c/busses/i2c-designware-core.h | |
| parent | bdfdf4b2ba644347d63a61da941f30aea1bd35fc (diff) | |
| download | linux-c62ebb3d5f0d0e9dafe990c9ce680ca9b46fd4c1.tar.bz2 | |
i2c: designware: Add support for an interface clock
The Synopsys I2C Controller has an interface clock, but most SoCs hide
this away. However, on some SoCs you need to explicitly enable the
interface clock in order to access the registers. Therefore, add
support for an optional interface clock.
Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Signed-off-by: Gareth Williams <gareth.williams.jx@renesas.com>
Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Tested-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/i2c/busses/i2c-designware-core.h')
| -rw-r--r-- | drivers/i2c/busses/i2c-designware-core.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/i2c/busses/i2c-designware-core.h b/drivers/i2c/busses/i2c-designware-core.h index 6b4ef1d38fb2..67edbbde1070 100644 --- a/drivers/i2c/busses/i2c-designware-core.h +++ b/drivers/i2c/busses/i2c-designware-core.h @@ -177,6 +177,7 @@ * @base: IO registers pointer * @cmd_complete: tx completion indicator * @clk: input reference clock + * @pclk: clock required to access the registers * @slave: represent an I2C slave device * @cmd_err: run time hadware error code * @msgs: points to an array of messages currently being transferred @@ -227,6 +228,7 @@ struct dw_i2c_dev { void __iomem *ext; struct completion cmd_complete; struct clk *clk; + struct clk *pclk; struct reset_control *rst; struct i2c_client *slave; u32 (*get_clk_rate_khz) (struct dw_i2c_dev *dev); |