[v5,11/19] PCI: qcom: Use bulk reset APIs for handling resets for IP rev 2.3.3

Commit Message

Manivannan Sadhasivam March 16, 2023, 8:11 a.m. UTC

All the resets are asserted and deasserted at the same time. So the bulk
reset APIs can be used to handle them together. This simplifies the code
a lot.

Signed-off-by: Manivannan Sadhasivam <[e-mail]>
---
 drivers/pci/controller/dwc/pcie-qcom.c | 49 ++++++++++++--------------
 1 file changed, 23 insertions(+), 26 deletions(-)

Patch

diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index 42b851bdf1a9..d673cb29c913 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -170,9 +170,10 @@  struct qcom_pcie_resources_2_3_2 {
 };
 
 #define QCOM_PCIE_2_3_3_MAX_CLOCKS		5
+#define QCOM_PCIE_2_3_3_MAX_RESETS		7
 struct qcom_pcie_resources_2_3_3 {
 	struct clk_bulk_data clks[QCOM_PCIE_2_3_3_MAX_CLOCKS];
-	struct reset_control *rst[7];
+	struct reset_control_bulk_data rst[QCOM_PCIE_2_3_3_MAX_RESETS];
 };
 
 #define QCOM_PCIE_2_4_0_MAX_CLOCKS	4
@@ -889,10 +890,6 @@  static int qcom_pcie_get_resources_2_3_3(struct qcom_pcie *pcie)
 	struct qcom_pcie_resources_2_3_3 *res = &pcie->res.v2_3_3;
 	struct dw_pcie *pci = pcie->pci;
 	struct device *dev = pci->dev;
-	int i;
-	const char *rst_names[] = { "axi_m", "axi_s", "pipe",
-				    "axi_m_sticky", "sticky",
-				    "ahb", "sleep", };
 	int ret;
 
 	res->clks[0].id = "iface";
@@ -905,11 +902,17 @@  static int qcom_pcie_get_resources_2_3_3(struct qcom_pcie *pcie)
 	if (ret < 0)
 		return ret;
 
-	for (i = 0; i < ARRAY_SIZE(rst_names); i++) {
-		res->rst[i] = devm_reset_control_get(dev, rst_names[i]);
-		if (IS_ERR(res->rst[i]))
-			return PTR_ERR(res->rst[i]);
-	}
+	res->rst[0].id = "axi_m";
+	res->rst[1].id = "axi_s";
+	res->rst[2].id = "pipe";
+	res->rst[3].id = "axi_m_sticky";
+	res->rst[4].id = "sticky";
+	res->rst[5].id = "ahb";
+	res->rst[6].id = "sleep";
+
+	ret = devm_reset_control_bulk_get_exclusive(dev, ARRAY_SIZE(res->rst), res->rst);
+	if (ret < 0)
+		return ret;
 
 	return 0;
 }
@@ -926,25 +929,20 @@  static int qcom_pcie_init_2_3_3(struct qcom_pcie *pcie)
 	struct qcom_pcie_resources_2_3_3 *res = &pcie->res.v2_3_3;
 	struct dw_pcie *pci = pcie->pci;
 	struct device *dev = pci->dev;
-	int i, ret;
+	int ret;
 
-	for (i = 0; i < ARRAY_SIZE(res->rst); i++) {
-		ret = reset_control_assert(res->rst[i]);
-		if (ret) {
-			dev_err(dev, "reset #%d assert failed (%d)\n", i, ret);
-			return ret;
-		}
+	ret = reset_control_bulk_assert(ARRAY_SIZE(res->rst), res->rst);
+	if (ret < 0) {
+		dev_err(dev, "cannot assert resets\n");
+		return ret;
 	}
 
 	usleep_range(2000, 2500);
 
-	for (i = 0; i < ARRAY_SIZE(res->rst); i++) {
-		ret = reset_control_deassert(res->rst[i]);
-		if (ret) {
-			dev_err(dev, "reset #%d deassert failed (%d)\n", i,
-				ret);
-			return ret;
-		}
+	ret = reset_control_bulk_deassert(ARRAY_SIZE(res->rst), res->rst);
+	if (ret < 0) {
+		dev_err(dev, "cannot deassert resets\n");
+		return ret;
 	}
 
 	/*
@@ -966,8 +964,7 @@  static int qcom_pcie_init_2_3_3(struct qcom_pcie *pcie)
 	 * Not checking for failure, will anyway return
 	 * the original failure in 'ret'.
 	 */
-	for (i = 0; i < ARRAY_SIZE(res->rst); i++)
-		reset_control_assert(res->rst[i]);
+	reset_control_bulk_assert(ARRAY_SIZE(res->rst), res->rst);
 
 	return ret;
 }