linux-kernel - [PATCH v2] clk: qcom: gcc-ipq6018: add qdss

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Message-Id: <1706001970-26032-1-git-send-email-mantas@8devices.com>
Date: Tue, 23 Jan 2024 11:26:09 +0200
From: Mantas Pucka <mantas@...vices.com>
To: Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konrad.dybcio@...aro.org>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>
Cc: Mantas Pucka <mantas@...vices.com>,
	linux-arm-msm@...r.kernel.org,
	linux-clk@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2] clk: qcom: gcc-ipq6018: add qdss_at clock needed for wifi operation

Without it system hangs upon wifi firmware load. It should be enabled by
remoteproc/wifi driver. Bindings already exist for it, so add it based
on vendor code.

Signed-off-by: Mantas Pucka <mantas@...vices.com>
---

Changes in v2:
  Remove CLK_IS_CRITICAL flag
  Note in commit message that clock should be enabled by remoteproc driver

 drivers/clk/qcom/gcc-ipq6018.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/drivers/clk/qcom/gcc-ipq6018.c b/drivers/clk/qcom/gcc-ipq6018.c
index b366912cd648..cef787674479 100644
--- a/drivers/clk/qcom/gcc-ipq6018.c
+++ b/drivers/clk/qcom/gcc-ipq6018.c
@@ -3522,6 +3522,22 @@ static struct clk_branch gcc_prng_ahb_clk = {
 	},
 };
 
+static struct clk_branch gcc_qdss_at_clk = {
+	.halt_reg = 0x29024,
+	.clkr = {
+		.enable_reg = 0x29024,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data){
+			.name = "gcc_qdss_at_clk",
+			.parent_hws = (const struct clk_hw *[]){
+				&qdss_at_clk_src.clkr.hw },
+			.num_parents = 1,
+			.flags = CLK_SET_RATE_PARENT,
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
 static struct clk_branch gcc_qdss_dap_clk = {
 	.halt_reg = 0x29084,
 	.clkr = {
@@ -4361,6 +4377,7 @@ static struct clk_regmap *gcc_ipq6018_clks[] = {
 	[GCC_SYS_NOC_PCIE0_AXI_CLK] = &gcc_sys_noc_pcie0_axi_clk.clkr,
 	[GCC_PCIE0_PIPE_CLK] = &gcc_pcie0_pipe_clk.clkr,
 	[GCC_PRNG_AHB_CLK] = &gcc_prng_ahb_clk.clkr,
+	[GCC_QDSS_AT_CLK] = &gcc_qdss_at_clk.clkr,
 	[GCC_QDSS_DAP_CLK] = &gcc_qdss_dap_clk.clkr,
 	[GCC_QPIC_AHB_CLK] = &gcc_qpic_ahb_clk.clkr,
 	[GCC_QPIC_CLK] = &gcc_qpic_clk.clkr,
-- 
2.7.4