On 4/25/2018 2:51 AM, Austin Christ wrote:
> Previously the QUP driver limited operation mode to I2C Fast Mode. Add
> Fast Mode Plus functionality by raising SCL limit from 400kHz to 1MHz.
>
> Signed-off-by: Austin Christ <austinwc@xxxxxxxxxxxxxx>
Reviewed-by: Sricharan R <sricharan@xxxxxxxxxxxxxx>
Regards,
Sricharan
> ---
> drivers/i2c/busses/i2c-qup.c | 11 ++++++++---
> 1 file changed, 8 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/i2c/busses/i2c-qup.c b/drivers/i2c/busses/i2c-qup.c
> index c024f85..ce5f215 100644
> --- a/drivers/i2c/busses/i2c-qup.c
> +++ b/drivers/i2c/busses/i2c-qup.c
> @@ -136,8 +136,13 @@
> */
> #define TOUT_MIN 2
>
> +/* I2C Frequency Modes */
> +#define I2C_STANDARD_FREQ 100000
> +#define I2C_FAST_MODE_FREQ 400000
> +#define I2C_FAST_MODE_PLUS_FREQ 1000000
> +
> /* Default values. Use these if FW query fails */
> -#define DEFAULT_CLK_FREQ 100000
> +#define DEFAULT_CLK_FREQ I2C_STANDARD_FREQ
> #define DEFAULT_SRC_CLK 20000000
>
> /*
> @@ -1745,8 +1750,8 @@ static int qup_i2c_probe(struct platform_device *pdev)
> }
>
> nodma:
> - /* We support frequencies up to FAST Mode (400KHz) */
> - if (!clk_freq || clk_freq > 400000) {
> + /* We support frequencies up to FAST Mode Plus (1MHz) */
> + if (!clk_freq || clk_freq > I2C_FAST_MODE_PLUS_FREQ) {
> dev_err(qup->dev, "clock frequency not supported %d\n",
> clk_freq);
> return -EINVAL;
>
--
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