clk: qcom: Add QCS404 TuringCC

The Turing Clock Controller provides resources related to running the
Turing subsystem.

PM runtime is used to ensure that the associated AHB clock is ticking
while the clock framework is accessing the registers in the Turing clock
controller.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

1 files changed, 170 insertions, 0 deletions

diff --git a/drivers/clk/qcom/turingcc-qcs404.c b/drivers/clk/qcom/turingcc-qcs404.c
new file mode 100644
index 000000000000..aa859e6ec9bd
--- /dev/null
+++ b/drivers/clk/qcom/turingcc-qcs404.c
@@ -0,0 +1,170 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2019, Linaro Ltd.
+ */
+
+#include <linux/bitops.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/pm_clock.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+
+#include <dt-bindings/clock/qcom,turingcc-qcs404.h>
+
+#include "clk-regmap.h"
+#include "clk-branch.h"
+#include "common.h"
+#include "reset.h"
+
+static struct clk_branch turing_wrapper_aon_cbcr = {
+	.halt_reg = 0x5098,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0x5098,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data) {
+			.name = "turing_wrapper_aon_clk",
+			.ops = &clk_branch2_aon_ops,
+		},
+	},
+};
+
+static struct clk_branch turing_q6ss_ahbm_aon_cbcr = {
+	.halt_reg = 0x9000,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0x9000,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data) {
+			.name = "turing_q6ss_ahbm_aon_cbcr",
+			.ops = &clk_branch2_ops,
+		},
+	},
+};
+
+static struct clk_branch turing_q6ss_q6_axim_clk = {
+	.halt_reg = 0xb000,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0xb000,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data) {
+			.name = "turing_q6ss_q6_axim_clk",
+			.ops = &clk_branch2_aon_ops,
+		},
+	},
+};
+
+static struct clk_branch turing_q6ss_ahbs_aon_cbcr = {
+	.halt_reg = 0x10000,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0x10000,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data) {
+			.name = "turing_q6ss_ahbs_aon_clk",
+			.ops = &clk_branch2_aon_ops,
+		},
+	},
+};
+
+static struct clk_branch turing_wrapper_qos_ahbs_aon_cbcr = {
+	.halt_reg = 0x11014,
+	.halt_check = BRANCH_HALT,
+	.clkr = {
+		.enable_reg = 0x11014,
+		.enable_mask = BIT(0),
+		.hw.init = &(struct clk_init_data) {
+			.name = "turing_wrapper_qos_ahbs_aon_clk",
+			.ops = &clk_branch2_aon_ops,
+		},
+	},
+};
+
+static struct clk_regmap *turingcc_clocks[] = {
+	[TURING_WRAPPER_AON_CLK] = &turing_wrapper_aon_cbcr.clkr,
+	[TURING_Q6SS_AHBM_AON_CLK] = &turing_q6ss_ahbm_aon_cbcr.clkr,
+	[TURING_Q6SS_Q6_AXIM_CLK] = &turing_q6ss_q6_axim_clk.clkr,
+	[TURING_Q6SS_AHBS_AON_CLK] = &turing_q6ss_ahbs_aon_cbcr.clkr,
+	[TURING_WRAPPER_QOS_AHBS_AON_CLK] = &turing_wrapper_qos_ahbs_aon_cbcr.clkr,
+};
+
+static const struct regmap_config turingcc_regmap_config = {
+	.reg_bits	= 32,
+	.reg_stride	= 4,
+	.val_bits	= 32,
+	.max_register	= 0x30000,
+	.fast_io	= true,
+};
+
+static const struct qcom_cc_desc turingcc_desc = {
+	.config = &turingcc_regmap_config,
+	.clks = turingcc_clocks,
+	.num_clks = ARRAY_SIZE(turingcc_clocks),
+};
+
+static int turingcc_probe(struct platform_device *pdev)
+{
+	int ret;
+
+	pm_runtime_enable(&pdev->dev);
+	ret = pm_clk_create(&pdev->dev);
+	if (ret)
+		goto disable_pm_runtime;
+
+	ret = pm_clk_add(&pdev->dev, NULL);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "failed to acquire iface clock\n");
+		goto destroy_pm_clk;
+	}
+
+	ret = qcom_cc_probe(pdev, &turingcc_desc);
+	if (ret < 0)
+		goto destroy_pm_clk;
+
+	return 0;
+
+destroy_pm_clk:
+	pm_clk_destroy(&pdev->dev);
+
+disable_pm_runtime:
+	pm_runtime_disable(&pdev->dev);
+
+	return ret;
+}
+
+static int turingcc_remove(struct platform_device *pdev)
+{
+	pm_clk_destroy(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
+
+	return 0;
+}
+
+static const struct dev_pm_ops turingcc_pm_ops = {
+	SET_RUNTIME_PM_OPS(pm_clk_suspend, pm_clk_resume, NULL)
+};
+
+static const struct of_device_id turingcc_match_table[] = {
+	{ .compatible = "qcom,qcs404-turingcc" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, turingcc_match_table);
+
+static struct platform_driver turingcc_driver = {
+	.probe		= turingcc_probe,
+	.remove		= turingcc_remove,
+	.driver		= {
+		.name	= "qcs404-turingcc",
+		.of_match_table = turingcc_match_table,
+		.pm = &turingcc_pm_ops,
+	},
+};
+
+module_platform_driver(turingcc_driver);
+
+MODULE_DESCRIPTION("Qualcomm QCS404 Turing Clock Controller");
+MODULE_LICENSE("GPL v2");