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a=ed25519-sha256; t=1741866038; l=2235; i=krishna.chundru@oss.qualcomm.com; s=20230907; h=from:subject:message-id; bh=PmKuDjh7TYnL36BsL4uFK3e2cvQCdB+O1CmCQrAD7C4=; b=VI/8VNWycXRlPi0pSYk0Fr6aifEQor01L8qOLpfV49fEVzw8N9gQDJummotBMBPqY31zZA7TF 8B8Qv21rWMtAW2YvmJKRYqNsOmy9HioTo1b4j7eqVXVCjt88vTUB69Y X-Developer-Key: i=krishna.chundru@oss.qualcomm.com; a=ed25519; pk=10CL2pdAKFyzyOHbfSWHCD0X0my7CXxj8gJScmn1FAg= X-Proofpoint-GUID: -CRx_Df6LOIXH1d_r3e8omAC3HL8khFz X-Authority-Analysis: v=2.4 cv=V+F90fni c=1 sm=1 tr=0 ts=67d2c44f cx=c_pps a=UNFcQwm+pnOIJct1K4W+Mw==:117 a=ZePRamnt/+rB5gQjfz0u9A==:17 a=IkcTkHD0fZMA:10 a=Vs1iUdzkB0EA:10 a=EUspDBNiAAAA:8 a=kXhGf0cxdCgfIYue-YsA:9 a=QEXdDO2ut3YA:10 a=uKXjsCUrEbL0IQVhDsJ9:22 X-Proofpoint-ORIG-GUID: -CRx_Df6LOIXH1d_r3e8omAC3HL8khFz X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1093,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-03-13_05,2025-03-11_02,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 mlxlogscore=999 impostorscore=0 spamscore=0 priorityscore=1501 phishscore=0 mlxscore=0 lowpriorityscore=0 suspectscore=0 malwarescore=0 adultscore=0 bulkscore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2502280000 definitions=main-2503130092 Add support for pre_scale_bus_bw() & post_scale_bus_bw() function op's. Add support for DWC glue drivers to register for these ops. Signed-off-by: Krishna Chaitanya Chundru --- drivers/pci/controller/dwc/pcie-designware-host.c | 21 +++++++++++++++++++= ++ drivers/pci/controller/dwc/pcie-designware.h | 2 ++ 2 files changed, 23 insertions(+) diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pc= i/controller/dwc/pcie-designware-host.c index ffaded8f2df7..4da4df62c3f8 100644 --- a/drivers/pci/controller/dwc/pcie-designware-host.c +++ b/drivers/pci/controller/dwc/pcie-designware-host.c @@ -697,10 +697,31 @@ void __iomem *dw_pcie_own_conf_map_bus(struct pci_bus= *bus, unsigned int devfn, } EXPORT_SYMBOL_GPL(dw_pcie_own_conf_map_bus); =20 +static int dw_pcie_pre_scale_bus_bw(struct pci_bus *bus, int target_speed) +{ + struct dw_pcie_rp *pp =3D bus->sysdata; + int ret =3D 0; + + if (pp->ops->pre_scale_bus_bw) + ret =3D pp->ops->pre_scale_bus_bw(pp, target_speed); + + return ret; +} + +static void dw_pcie_post_scale_bus_bw(struct pci_bus *bus, int current_spe= ed) +{ + struct dw_pcie_rp *pp =3D bus->sysdata; + + if (pp->ops->pre_scale_bus_bw) + pp->ops->post_scale_bus_bw(pp, current_speed); +} + static struct pci_ops dw_pcie_ops =3D { .map_bus =3D dw_pcie_own_conf_map_bus, .read =3D pci_generic_config_read, .write =3D pci_generic_config_write, + .pre_scale_bus_bw =3D dw_pcie_pre_scale_bus_bw, + .post_scale_bus_bw =3D dw_pcie_post_scale_bus_bw, }; =20 static int dw_pcie_iatu_setup(struct dw_pcie_rp *pp) diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/con= troller/dwc/pcie-designware.h index 501d9ddfea16..16e02646a8b4 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -354,6 +354,8 @@ struct dw_pcie_host_ops { void (*post_init)(struct dw_pcie_rp *pp); int (*msi_init)(struct dw_pcie_rp *pp); void (*pme_turn_off)(struct dw_pcie_rp *pp); + int (*pre_scale_bus_bw)(struct dw_pcie_rp *pp, int target_speed); + void (*post_scale_bus_bw)(struct dw_pcie_rp *pp, int current_speed); }; =20 struct dw_pcie_rp { --=20 2.34.1