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Commit c18ee262 authored by Jianmin Zhu's avatar Jianmin Zhu
Browse files

cnss2: Set pcie link speed as default_gen_speed in dts 



For qca6490, read dts first to get default gen speed, if valid
setting existing, then use it, else use gen2.

Change-Id: I6cb507746d677da114408e78076c3cc21073a829
CRs-Fixed: 3003876
Signed-off-by: default avatarJianmin Zhu <jianminz@codeaurora.org>
parent 07005fd0

drivers/net/wireless/cnss2/pci.c

+11 −5
Original line number Diff line number Diff line
@@ -6021,15 +6021,21 @@ struct pci_driver cnss_pci_driver = { 
static int cnss_pci_enumerate(struct cnss_plat_data *plat_priv, u32 rc_num)

{

	int ret, retry = 0;

	u32 link_speed;



	/* Always set initial target PCIe link speed to Gen2 for QCA6490 device

	 * since there may be link issues if it boots up with Gen3 link speed.

	 * Device is able to change it later at any time. It will be rejected

	 * if requested speed is higher than the one specified in PCIe DT.

	/* For qca6490, read dts first to get default gen speed, if valid

	 * setting existing, then use it, else use gen2.

	 */

	if (plat_priv->device_id == QCA6490_DEVICE_ID) {

		ret = of_property_read_u32(plat_priv->plat_dev->dev.of_node,

					   "default_gen_speed",

					   &link_speed);

		if (ret || link_speed < PCI_EXP_LNKSTA_CLS_2_5GB ||

		    link_speed > PCI_EXP_LNKSTA_CLS_8_0GB)

			link_speed = PCI_EXP_LNKSTA_CLS_5_0GB;

		cnss_pr_dbg("Set pci link speed: %u\n", link_speed);

		ret = cnss_pci_set_max_link_speed(plat_priv->bus_priv, rc_num,

						  PCI_EXP_LNKSTA_CLS_5_0GB);

						  link_speed);

		if (ret && ret != -EPROBE_DEFER)

			cnss_pr_err("Failed to set max PCIe RC%x link speed to Gen2, err = %d\n",

				    rc_num, ret);