Re: [PATCH 2/2] i2c: qcom-geni: Add I2C frequency table for firmware-based SEs

[Mukesh Savaliya <mukesh.savaliya@oss.qualcomm.com>]

On 8/11/2026 2:53 PM, Kathiravan Thirumoorthy wrote:
> On IPQ5424, RTL-based I2C can be supported by both minicore and firmware
> based SEs. For firmware-based SEs, use different SCL settings as
> recommended by the design team. Introduce a separate table for the same.
> 
> Identify whether the SE is minicore or firmware-based and select the
what is minicore ? Please Make it upstream specific, RTL hardened or 
define minicore first.
> appropriate frequency table to achieve the desired bus frequencies.
> 
> Move geni_i2c_clk_map_idx() from geni_i2c_resources_init() to
> geni_i2c_init() to ensure SE_HW_PARAM_2 is accessed only after the
Reasoning required - why only for 32 MHz ? OR better reasoning for 32Mhz 
support related changes.
> required clocks have been enabled.
> 

I suggest to add 32Mhz support as this is already having 19.2MHz 
support. Subject shows generic frequency support sounding like no 
support present.

> Signed-off-by: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@oss.qualcomm.com>
> ---
>   drivers/i2c/busses/i2c-qcom-geni.c | 23 +++++++++++++++++------
>   include/linux/soc/qcom/geni-se.h   |  1 +
>   2 files changed, 18 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c
> index 00013b41a6f5..2f3026602c0c 100644
> --- a/drivers/i2c/busses/i2c-qcom-geni.c
> +++ b/drivers/i2c/busses/i2c-qcom-geni.c
> @@ -194,12 +194,21 @@ static const struct geni_i2c_clk_fld geni_i2c_clk_map_32mhz[] = {
rename to _minicore ?
>   	{}
>   };
>   
> +static const struct geni_i2c_clk_fld geni_i2c_clk_map_32mhz_fwcore[] = {
> +	{ I2C_MAX_STANDARD_MODE_FREQ, 12, 9, 10, 25 },
> +	{ I2C_MAX_FAST_MODE_FREQ, 4, 3, 9, 18 },
> +	{ I2C_MAX_FAST_MODE_PLUS_FREQ, 1, 6, 15, 29 },
> +	{}
> +};
> +
>   static int geni_i2c_clk_map_idx(struct geni_i2c_dev *gi2c)
>   {
>   	const struct geni_i2c_clk_fld *itr;
> +	bool is_minicore = FIELD_GET(GEN_USE_MINICORES,
> +				     readl_relaxed(gi2c->se.base + SE_HW_PARAM_2));
>   
>   	if (clk_get_rate(gi2c->se.clk) == 32 * HZ_PER_MHZ)
> -		itr = geni_i2c_clk_map_32mhz;
> +		itr = is_minicore ? geni_i2c_clk_map_32mhz : geni_i2c_clk_map_32mhz_fwcore;
_minicore with above table renamed.
>   	else
>   		itr = geni_i2c_clk_map_19p2mhz;
>   
> @@ -1046,6 +1055,13 @@ static int geni_i2c_init(struct geni_i2c_dev *gi2c)
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