linux-kernel - [PATCH v2 2/6] clk: qcom: Add support for GPU Clock Controller on QCS8300

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Message-ID: <20241024-qcs8300-mm-patches-v2-2-76c905060d0a@quicinc.com>
Date: Thu, 24 Oct 2024 19:01:15 +0530
From: Imran Shaik <quic_imrashai@...cinc.com>
To: Bjorn Andersson <andersson@...nel.org>,
        Michael Turquette
	<mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, Rob Herring
	<robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
	<conor+dt@...nel.org>
CC: Ajit Pandey <quic_ajipan@...cinc.com>, Taniya Das <quic_tdas@...cinc.com>,
        Jagadeesh Kona <quic_jkona@...cinc.com>,
        Satya Priya Kakitapalli
	<quic_skakitap@...cinc.com>,
        <linux-arm-msm@...r.kernel.org>, <linux-clk@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Imran Shaik <quic_imrashai@...cinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Subject: [PATCH v2 2/6] clk: qcom: Add support for GPU Clock Controller on
 QCS8300

Add support to the QCS8300 GPU clock controller by extending
the SA8775P GPU clock controller, which is mostly identical
but QCS8300 has few additional clocks and minor differences.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Signed-off-by: Imran Shaik <quic_imrashai@...cinc.com>
---
 drivers/clk/qcom/gpucc-sa8775p.c | 47 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)

diff --git a/drivers/clk/qcom/gpucc-sa8775p.c b/drivers/clk/qcom/gpucc-sa8775p.c
index f8a8ac343d70..99a8344b00db 100644
--- a/drivers/clk/qcom/gpucc-sa8775p.c
+++ b/drivers/clk/qcom/gpucc-sa8775p.c
@@ -317,6 +317,24 @@ static struct clk_branch gpu_cc_crc_ahb_clk = {
 	},
 };
 
+static struct clk_branch gpu_cc_cx_accu_shift_clk = {
+	.halt_reg = 0x95e8,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0x95e8,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data){
+			.name = "gpu_cc_cx_accu_shift_clk",
+			.parent_hws = (const struct clk_hw*[]){
+				&gpu_cc_xo_clk_src.clkr.hw,
+			},
+			.num_parents = 1,
+			.flags = CLK_SET_RATE_PARENT,
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
 static struct clk_branch gpu_cc_cx_ff_clk = {
 	.halt_reg = 0x914c,
 	.halt_check = BRANCH_HALT,
@@ -420,6 +438,24 @@ static struct clk_branch gpu_cc_demet_clk = {
 	},
 };
 
+static struct clk_branch gpu_cc_gx_accu_shift_clk = {
+	.halt_reg = 0x95e4,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0x95e4,
+		.enable_mask = BIT(0),
+		.hw.init = &(const struct clk_init_data){
+			.name = "gpu_cc_gx_accu_shift_clk",
+			.parent_hws = (const struct clk_hw*[]){
+				&gpu_cc_xo_clk_src.clkr.hw,
+			},
+			.num_parents = 1,
+			.flags = CLK_SET_RATE_PARENT,
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
 static struct clk_branch gpu_cc_hlos1_vote_gpu_smmu_clk = {
 	.halt_reg = 0x7000,
 	.halt_check = BRANCH_HALT_VOTED,
@@ -499,6 +535,7 @@ static struct clk_regmap *gpu_cc_sa8775p_clocks[] = {
 	[GPU_CC_AHB_CLK] = &gpu_cc_ahb_clk.clkr,
 	[GPU_CC_CB_CLK] = &gpu_cc_cb_clk.clkr,
 	[GPU_CC_CRC_AHB_CLK] = &gpu_cc_crc_ahb_clk.clkr,
+	[GPU_CC_CX_ACCU_SHIFT_CLK] = NULL,
 	[GPU_CC_CX_FF_CLK] = &gpu_cc_cx_ff_clk.clkr,
 	[GPU_CC_CX_GMU_CLK] = &gpu_cc_cx_gmu_clk.clkr,
 	[GPU_CC_CX_SNOC_DVM_CLK] = &gpu_cc_cx_snoc_dvm_clk.clkr,
@@ -508,6 +545,7 @@ static struct clk_regmap *gpu_cc_sa8775p_clocks[] = {
 	[GPU_CC_DEMET_DIV_CLK_SRC] = &gpu_cc_demet_div_clk_src.clkr,
 	[GPU_CC_FF_CLK_SRC] = &gpu_cc_ff_clk_src.clkr,
 	[GPU_CC_GMU_CLK_SRC] = &gpu_cc_gmu_clk_src.clkr,
+	[GPU_CC_GX_ACCU_SHIFT_CLK] = NULL,
 	[GPU_CC_HLOS1_VOTE_GPU_SMMU_CLK] = &gpu_cc_hlos1_vote_gpu_smmu_clk.clkr,
 	[GPU_CC_HUB_AHB_DIV_CLK_SRC] = &gpu_cc_hub_ahb_div_clk_src.clkr,
 	[GPU_CC_HUB_AON_CLK] = &gpu_cc_hub_aon_clk.clkr,
@@ -583,6 +621,7 @@ static const struct qcom_cc_desc gpu_cc_sa8775p_desc = {
 };
 
 static const struct of_device_id gpu_cc_sa8775p_match_table[] = {
+	{ .compatible = "qcom,qcs8300-gpucc" },
 	{ .compatible = "qcom,sa8775p-gpucc" },
 	{ }
 };
@@ -596,6 +635,14 @@ static int gpu_cc_sa8775p_probe(struct platform_device *pdev)
 	if (IS_ERR(regmap))
 		return PTR_ERR(regmap);
 
+	if (of_device_is_compatible(pdev->dev.of_node, "qcom,qcs8300-gpucc")) {
+		gpu_cc_pll0_config.l = 0x31;
+		gpu_cc_pll0_config.alpha = 0xe555;
+
+		gpu_cc_sa8775p_clocks[GPU_CC_CX_ACCU_SHIFT_CLK] = &gpu_cc_cx_accu_shift_clk.clkr;
+		gpu_cc_sa8775p_clocks[GPU_CC_GX_ACCU_SHIFT_CLK] = &gpu_cc_gx_accu_shift_clk.clkr;
+	}
+
 	clk_lucid_evo_pll_configure(&gpu_cc_pll0, regmap, &gpu_cc_pll0_config);
 	clk_lucid_evo_pll_configure(&gpu_cc_pll1, regmap, &gpu_cc_pll1_config);
 

-- 
2.25.1