phy: qcom: pcie: Determine has_nocsr_reset dynamically

Decide the in-driver logic based on whether the nocsr reset is present
and defer checking the appropriateness of that to dt-bindings to save
on boilerplate.

Reset controller APIs are fine consuming a nullptr, so no additional
checks are necessary there.

Signed-off-by: Konrad Dybcio <[email protected]>
Signed-off-by: Wenbin Yao <[email protected]>
Reviewed-by: Abel Vesa <[email protected]>
Reviewed-by: Manivannan Sadhasivam <[email protected]>
Reviewed-by: Philipp Zabel <[email protected]>
Tested-by: Aleksandrs Vinarskis <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vinod Koul <[email protected]>

Author: quic-kdybcio

drivers/phy/qualcomm/phy-qcom-qmp-pcie.c

@@ -3021,8 +3021,6 @@ struct qmp_phy_cfg {
 
 	bool skip_start_delay;
 
-	bool has_nocsr_reset;
-
 	/* QMP PHY pipe clock interface rate */
 	unsigned long pipe_clock_rate;
 
@@ -4020,7 +4018,6 @@ static const struct qmp_phy_cfg sm8550_qmp_gen4x2_pciephy_cfg = {
 
 	.pwrdn_ctrl		= SW_PWRDN | REFCLK_DRV_DSBL,
 	.phy_status		= PHYSTATUS_4_20,
-	.has_nocsr_reset	= true,
 
 	/* 20MHz PHY AUX Clock */
 	.aux_clock_rate		= 20000000,
@@ -4053,7 +4050,6 @@ static const struct qmp_phy_cfg sm8650_qmp_gen4x2_pciephy_cfg = {
 
 	.pwrdn_ctrl		= SW_PWRDN | REFCLK_DRV_DSBL,
 	.phy_status		= PHYSTATUS_4_20,
-	.has_nocsr_reset	= true,
 
 	/* 20MHz PHY AUX Clock */
 	.aux_clock_rate		= 20000000,
@@ -4173,7 +4169,6 @@ static const struct qmp_phy_cfg x1e80100_qmp_gen4x2_pciephy_cfg = {
 
 	.pwrdn_ctrl		= SW_PWRDN | REFCLK_DRV_DSBL,
 	.phy_status		= PHYSTATUS_4_20,
-	.has_nocsr_reset	= true,
 };
 
 static const struct qmp_phy_cfg x1e80100_qmp_gen4x4_pciephy_cfg = {
@@ -4207,7 +4202,6 @@ static const struct qmp_phy_cfg x1e80100_qmp_gen4x4_pciephy_cfg = {
 
 	.pwrdn_ctrl		= SW_PWRDN | REFCLK_DRV_DSBL,
 	.phy_status		= PHYSTATUS_4_20,
-	.has_nocsr_reset	= true,
 };
 
 static const struct qmp_phy_cfg x1e80100_qmp_gen4x8_pciephy_cfg = {
@@ -4239,7 +4233,6 @@ static const struct qmp_phy_cfg x1e80100_qmp_gen4x8_pciephy_cfg = {
 
 	.pwrdn_ctrl		= SW_PWRDN | REFCLK_DRV_DSBL,
 	.phy_status		= PHYSTATUS_4_20,
-	.has_nocsr_reset	= true,
 };
 
 static const struct qmp_phy_cfg qmp_v6_gen4x4_pciephy_cfg = {
@@ -4557,12 +4550,10 @@ static int qmp_pcie_reset_init(struct qmp_pcie *qmp)
 	if (ret)
 		return dev_err_probe(dev, ret, "failed to get resets\n");
 
-	if (cfg->has_nocsr_reset) {
-		qmp->nocsr_reset = devm_reset_control_get_exclusive(dev, "phy_nocsr");
-		if (IS_ERR(qmp->nocsr_reset))
-			return dev_err_probe(dev, PTR_ERR(qmp->nocsr_reset),
-						"failed to get no-csr reset\n");
-	}
+	qmp->nocsr_reset = devm_reset_control_get_optional_exclusive(dev, "phy_nocsr");
+	if (IS_ERR(qmp->nocsr_reset))
+		return dev_err_probe(dev, PTR_ERR(qmp->nocsr_reset),
+							"failed to get no-csr reset\n");
 
 	return 0;
 }