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Wed, 26 Aug 2026 09:57:07 -0700 (PDT) X-Received: by 2002:a17:90a:fc4b:b0:38e:bbf1:de3f with SMTP id 98e67ed59e1d1-3966d8ab823mr18477914a91.12.1787763426937; Wed, 26 Aug 2026 09:57:06 -0700 (PDT) Received: from [192.168.1.9] ([122.164.80.180]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-39667fe29absm4966375a91.0.2026.08.26.09.57.02 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 26 Aug 2026 09:57:05 -0700 (PDT) Message-ID: <6ec861d5-c31e-4b32-a59f-17da3017edee@oss.qualcomm.com> Date: Wed, 26 Aug 2026 22:27:00 +0530 Precedence: bulk X-Mailing-List: linux-i2c@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 2/2] i2c: qcom-geni: add I2C frequency table for 32 MHz firmware-based SEs To: Konrad Dybcio , Mukesh Kumar Savaliya , Viken Dadhaniya , Andi Shyti , Manikanta Mylavarapu , Bjorn Andersson , Konrad Dybcio Cc: Mukesh Kumar Savaliya , linux-i2c@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260812-ipq5424_i2c_scl_updates-v2-0-e09cd39d01d7@oss.qualcomm.com> <20260812-ipq5424_i2c_scl_updates-v2-2-e09cd39d01d7@oss.qualcomm.com> <30a04183-b8d5-4a6d-8092-6b888a240410@oss.qualcomm.com> Content-Language: en-US From: Kathiravan Thirumoorthy In-Reply-To: <30a04183-b8d5-4a6d-8092-6b888a240410@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: tnXa9AxDkNLFix-ZgHOYBFqgcPG2DRga X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODI2MDE0MSBTYWx0ZWRfX01X868gznkmr xk0Q/R2ozXNpqrQAagU+VvSf05z6qR//0EBTUTDa4Crt5eklpvMD9i86gedQznNpulPe+PaplZb 29hgdTqeU86w2ToqIhQuibtvEGjtVvTQVG8OCFOCIJdcqJXCRWyir4w4Ris2I4cFXNW3BGlL2wC iUA7Q0A/c749HqANCiSvrwkzanITxM0XZxRqryIEK+Q0l1cNmAeh4W1oNpyCCHmQe0rKspPn/iA WzK1eNROr2durFSM0kMUduwyFOY/NSha3FYMdIMbRPCiDlZdmy4CjJfq/iRauhIDL6lBz+OCzYS 1B+2CUUeCO96S+IxxaqOiZhbNvO3F9XLiYQSZu24l+Ct93681Fc5f5y3Yot9yjNxr+YtQG+PG5L Bb5lJmmcDL2F/x4sgE5sct8B03v7X9Jg7700mD5xUsRVi1KFxCSaeSzAafPftEHRq3IDMgsukDq HHsCViLfb1v6ts6MFKg== X-Authority-Analysis: v=2.4 cv=Xfq5Co55 c=1 sm=1 tr=0 ts=6a8f1ae5 cx=c_pps a=vVfyC5vLCtgYJKYeQD43oA==:117 a=hGlz9nroTSpjRt0Kr7HQew==:17 a=IkcTkHD0fZMA:10 a=Sv0fKeRqtYgA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yx91gb_oNiZeI1HMLzn7:22 a=EUspDBNiAAAA:8 a=vCtHxe5HAd3mbei2lpsA:9 a=QEXdDO2ut3YA:10 a=rl5im9kqc5Lf4LNbBjHf:22 X-Proofpoint-Spam-Info: AW1haW4tMjYwODI2MDE0MSBTYWx0ZWRfX96UN65WnyVcx G4KKbYX3r/8AiCKdwsK8fwI+GO++yrDNJYJ78CY1GAvjfD6dA65SRV1OJmlCRZwp11KDTzNQQlR IhtibyXCtFvRFRZavrNuB9g3gCND9Uw= X-Proofpoint-ORIG-GUID: tnXa9AxDkNLFix-ZgHOYBFqgcPG2DRga X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-08-26_05,2026-08-26_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 lowpriorityscore=0 phishscore=0 suspectscore=0 priorityscore=1501 bulkscore=0 clxscore=1015 malwarescore=0 adultscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608260141 On 8/24/2026 2:54 PM, Konrad Dybcio wrote: > On 8/12/26 10:30 AM, Kathiravan Thirumoorthy wrote: >> On IPQ5424, the I2C controller can operate on both RTL-hardened SEs >> and firmware-based SEs. As documented in commit 506bb2ab0075 >> ("i2c: qcom-geni: Support systems with 32MHz serial engine clock"), >> in IPQ5424 SEs use a 32 MHz source clock. >> >> The existing frequency table does not provide the required SCL timing >> parameters for firmware-based SEs. Add a dedicated frequency table >> using the SCL counter values recommended by the hardware design team >> and select it for firmware-based SEs to achieve the target 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 >> required clocks have been enabled. >> >> Signed-off-by: Kathiravan Thirumoorthy >> --- >> drivers/i2c/busses/i2c-qcom-geni.c | 25 ++++++++++++++++++------- >> include/linux/soc/qcom/geni-se.h | 1 + >> 2 files changed, 19 insertions(+), 7 deletions(-) >> >> diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c >> index 00013b41a6f5..15835f10b062 100644 >> --- a/drivers/i2c/busses/i2c-qcom-geni.c >> +++ b/drivers/i2c/busses/i2c-qcom-geni.c >> @@ -187,19 +187,28 @@ static const struct geni_i2c_clk_fld geni_i2c_clk_map_19p2mhz[] = { >> }; >> >> /* source_clock = 32 MHz */ >> -static const struct geni_i2c_clk_fld geni_i2c_clk_map_32mhz[] = { >> +static const struct geni_i2c_clk_fld geni_i2c_clk_map_32mhz_minicore[] = { >> { I2C_MAX_STANDARD_MODE_FREQ, 12, 9, 10, 26 }, >> { I2C_MAX_FAST_MODE_FREQ, 4, 3, 9, 19 }, >> { I2C_MAX_FAST_MODE_PLUS_FREQ, 2, 3, 5, 15 }, >> {} >> }; >> >> +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 }, >> + {} >> +}; > The fwcore one seems to be slightly "stricter" - wouldn't it work > for both of them? No, We are not able to achieve the desired frequency. So based on design team's feedback, we are using separate configurations. > > Konrad