linux-kernel - [PATCH AUTOSEL 6.14 08/31] phy: qcom: qmp-pcie: Add X1P42100 Gen4x4 PHY

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Message-Id: <20250407181054.3177479-8-sashal@kernel.org>
Date: Mon,  7 Apr 2025 14:10:24 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
	Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
	Jens Glathe <jens.glathe@...schoolsolutions.biz>,
	Vinod Koul <vkoul@...nel.org>,
	Sasha Levin <sashal@...nel.org>,
	kishon@...nel.org,
	lumag@...nel.org,
	abel.vesa@...aro.org,
	neil.armstrong@...aro.org,
	quic_qianyu@...cinc.com,
	quic_ziyuzhan@...cinc.com,
	quic_devipriy@...cinc.com,
	quic_krichai@...cinc.com,
	manivannan.sadhasivam@...aro.org,
	johan+linaro@...nel.org,
	linux-arm-msm@...r.kernel.org,
	linux-phy@...ts.infradead.org
Subject: [PATCH AUTOSEL 6.14 08/31] phy: qcom: qmp-pcie: Add X1P42100 Gen4x4 PHY

From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>

[ Upstream commit 0d8db251dd15d2e284f5a6a53bc2b869f3eca711 ]

Add a new, common configuration for Gen4x4 V6 PHYs without an init
sequence.

The bootloader configures the hardware once and the OS retains that
configuration by using the NOCSR reset line (which doesn't drop
register state on assert) in place of the "full reset" one.

Use this new configuration for X1P42100's Gen4x4 PHY.

Acked-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Tested-by: Jens Glathe <jens.glathe@...schoolsolutions.biz>
Signed-off-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Link: https://lore.kernel.org/r/20250203-topic-x1p4_dts-v2-3-72cd4cdc767b@oss.qualcomm.com
Signed-off-by: Vinod Koul <vkoul@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/phy/qualcomm/phy-qcom-qmp-pcie.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c b/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
index 018bbb3008303..6726bbe4ad15d 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
@@ -4156,6 +4156,21 @@ static const struct qmp_phy_cfg x1e80100_qmp_gen4x8_pciephy_cfg = {
 	.has_nocsr_reset	= true,
 };
 
+static const struct qmp_phy_cfg qmp_v6_gen4x4_pciephy_cfg = {
+	.lanes = 4,
+
+	.offsets                = &qmp_pcie_offsets_v6_20,
+
+	.reset_list             = sdm845_pciephy_reset_l,
+	.num_resets             = ARRAY_SIZE(sdm845_pciephy_reset_l),
+	.vreg_list              = qmp_phy_vreg_l,
+	.num_vregs              = ARRAY_SIZE(qmp_phy_vreg_l),
+	.regs                   = pciephy_v6_regs_layout,
+
+	.pwrdn_ctrl             = SW_PWRDN | REFCLK_DRV_DSBL,
+	.phy_status             = PHYSTATUS_4_20,
+};
+
 static void qmp_pcie_init_port_b(struct qmp_pcie *qmp, const struct qmp_phy_cfg_tbls *tbls)
 {
 	const struct qmp_phy_cfg *cfg = qmp->cfg;
@@ -4960,6 +4975,9 @@ static const struct of_device_id qmp_pcie_of_match_table[] = {
 	}, {
 		.compatible = "qcom,x1e80100-qmp-gen4x8-pcie-phy",
 		.data = &x1e80100_qmp_gen4x8_pciephy_cfg,
+	}, {
+		.compatible = "qcom,x1p42100-qmp-gen4x4-pcie-phy",
+		.data = &qmp_v6_gen4x4_pciephy_cfg,
 	},
 	{ },
 };
-- 
2.39.5