[PATCH 03/10] phy: qcom-usb-hsic: do not run the sleep calibration clock

[Manivannan Sadhasivam]

On Mon, Aug 10, 2026 at 06:42:07PM +0300, Dmitry Baryshkov wrote:
> With the cal_sleep (32 kHz IO calibration sleep) clock running, the
> HSIC PHY engages its sleep calibration: the strobe/data pad
> calibration converges to different values than with the active
> calibration alone, HSIC_CFG reports the sleep calibration state, and
> the port no longer detects a device connect - an onboard HSIC hub
> signalling its attach after reset is never seen (observed on the
> APQ8074 Dragonboard against its USB4604 hub, by comparing the ULPI
> register state against the vendor kernel, which never enables this
> clock: with cal_sleep enabled ULPI HSIC_CFG reads 0xab and the pad
> registers 0x0f/0x0d, without it 0xa9 and 0x10/0x10, matching the
> working vendor configuration).
> 
> Stop requesting and enabling the cal_sleep clock.
> 
> Assisted-by: Claude:claude-fable-5
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov at oss.qualcomm.com>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam at oss.qualcomm.com>

- Mani

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