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Subject[PATCH v3 3/3] clk: qcom: Add modem clock controller driver for SC7180
Date
Add support for the modem clock controller found on SC7180
based devices. This would allow modem drivers to probe and
control their clocks.

Signed-off-by: Taniya Das <tdas@codeaurora.org>
---
drivers/clk/qcom/Kconfig | 9 +++
drivers/clk/qcom/Makefile | 1 +
drivers/clk/qcom/gcc-sc7180.c | 70 +++++++++++++++++++++
drivers/clk/qcom/mss-sc7180.c | 143 ++++++++++++++++++++++++++++++++++++++++++
4 files changed, 223 insertions(+)
create mode 100644 drivers/clk/qcom/mss-sc7180.c

diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig
index b6bd58dd..19f48af 100644
--- a/drivers/clk/qcom/Kconfig
+++ b/drivers/clk/qcom/Kconfig
@@ -272,6 +272,15 @@ config SC_GPUCC_7180
Say Y if you want to support graphics controller devices and
functionality such as 3D graphics.

+config SC_MSS_7180
+ tristate "SC7180 Modem Clock Controller"
+ select SC_GCC_7180
+ help
+ Support for the Modem Subsystem clock controller on Qualcomm
+ Technologies, Inc on SC7180 devices.
+ Say Y if you want to use the Modem branch clocks of the Modem
+ subsystem clock controller to reset the MSS subsystem.
+
config SC_VIDEOCC_7180
tristate "SC7180 Video Clock Controller"
select SC_GCC_7180
diff --git a/drivers/clk/qcom/Makefile b/drivers/clk/qcom/Makefile
index 2eda59a..f8dbfeb 100644
--- a/drivers/clk/qcom/Makefile
+++ b/drivers/clk/qcom/Makefile
@@ -49,6 +49,7 @@ obj-$(CONFIG_QCS_TURING_404) += turingcc-qcs404.o
obj-$(CONFIG_SC_DISPCC_7180) += dispcc-sc7180.o
obj-$(CONFIG_SC_GCC_7180) += gcc-sc7180.o
obj-$(CONFIG_SC_GPUCC_7180) += gpucc-sc7180.o
+obj-$(CONFIG_SC_MSS_7180) += mss-sc7180.o
obj-$(CONFIG_SC_VIDEOCC_7180) += videocc-sc7180.o
obj-$(CONFIG_SDM_CAMCC_845) += camcc-sdm845.o
obj-$(CONFIG_SDM_DISPCC_845) += dispcc-sdm845.o
diff --git a/drivers/clk/qcom/gcc-sc7180.c b/drivers/clk/qcom/gcc-sc7180.c
index 7f59fb8..aa75e9b 100644
--- a/drivers/clk/qcom/gcc-sc7180.c
+++ b/drivers/clk/qcom/gcc-sc7180.c
@@ -2165,6 +2165,71 @@ static struct clk_branch gcc_video_xo_clk = {
},
};

+static struct clk_branch gcc_mss_cfg_ahb_clk = {
+ .halt_reg = 0x8a000,
+ .halt_check = BRANCH_HALT,
+ .clkr = {
+ .enable_reg = 0x8a000,
+ .enable_mask = BIT(0),
+ .hw.init = &(struct clk_init_data){
+ .name = "gcc_mss_cfg_ahb_clk",
+ .ops = &clk_branch2_ops,
+ },
+ },
+};
+
+static struct clk_branch gcc_mss_mfab_axis_clk = {
+ .halt_reg = 0x8a004,
+ .halt_check = BRANCH_HALT_VOTED,
+ .clkr = {
+ .enable_reg = 0x8a004,
+ .enable_mask = BIT(0),
+ .hw.init = &(struct clk_init_data){
+ .name = "gcc_mss_mfab_axis_clk",
+ .ops = &clk_branch2_ops,
+ },
+ },
+};
+
+static struct clk_branch gcc_mss_nav_axi_clk = {
+ .halt_reg = 0x8a00c,
+ .halt_check = BRANCH_HALT_VOTED,
+ .clkr = {
+ .enable_reg = 0x8a00c,
+ .enable_mask = BIT(0),
+ .hw.init = &(struct clk_init_data){
+ .name = "gcc_mss_nav_axi_clk",
+ .ops = &clk_branch2_ops,
+ },
+ },
+};
+
+static struct clk_branch gcc_mss_snoc_axi_clk = {
+ .halt_reg = 0x8a150,
+ .halt_check = BRANCH_HALT,
+ .clkr = {
+ .enable_reg = 0x8a150,
+ .enable_mask = BIT(0),
+ .hw.init = &(struct clk_init_data){
+ .name = "gcc_mss_snoc_axi_clk",
+ .ops = &clk_branch2_ops,
+ },
+ },
+};
+
+static struct clk_branch gcc_mss_q6_memnoc_axi_clk = {
+ .halt_reg = 0x8a154,
+ .halt_check = BRANCH_HALT,
+ .clkr = {
+ .enable_reg = 0x8a154,
+ .enable_mask = BIT(0),
+ .hw.init = &(struct clk_init_data){
+ .name = "gcc_mss_q6_memnoc_axi_clk",
+ .ops = &clk_branch2_ops,
+ },
+ },
+};
+
static struct gdsc ufs_phy_gdsc = {
.gdscr = 0x77004,
.pd = {
@@ -2336,6 +2401,11 @@ static struct clk_regmap *gcc_sc7180_clocks[] = {
[GPLL7] = &gpll7.clkr,
[GPLL4] = &gpll4.clkr,
[GPLL1] = &gpll1.clkr,
+ [GCC_MSS_CFG_AHB_CLK] = &gcc_mss_cfg_ahb_clk.clkr,
+ [GCC_MSS_MFAB_AXIS_CLK] = &gcc_mss_mfab_axis_clk.clkr,
+ [GCC_MSS_NAV_AXI_CLK] = &gcc_mss_nav_axi_clk.clkr,
+ [GCC_MSS_Q6_MEMNOC_AXI_CLK] = &gcc_mss_q6_memnoc_axi_clk.clkr,
+ [GCC_MSS_SNOC_AXI_CLK] = &gcc_mss_snoc_axi_clk.clkr,
};

static const struct qcom_reset_map gcc_sc7180_resets[] = {
diff --git a/drivers/clk/qcom/mss-sc7180.c b/drivers/clk/qcom/mss-sc7180.c
new file mode 100644
index 0000000..d82600e
--- /dev/null
+++ b/drivers/clk/qcom/mss-sc7180.c
@@ -0,0 +1,143 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2019, The Linux Foundation. All rights reserved.
+ */
+
+#include <linux/clk-provider.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,mss-sc7180.h>
+
+#include "clk-regmap.h"
+#include "clk-branch.h"
+#include "common.h"
+
+static struct clk_branch mss_axi_nav_clk = {
+ .halt_reg = 0x20bc,
+ .halt_check = BRANCH_HALT,
+ .clkr = {
+ .enable_reg = 0x20bc,
+ .enable_mask = BIT(0),
+ .hw.init = &(struct clk_init_data){
+ .name = "mss_axi_nav_clk",
+ .parent_data = &(const struct clk_parent_data){
+ .fw_name = "gcc_mss_nav_axi_clk",
+ },
+ .num_parents = 1,
+ .ops = &clk_branch2_ops,
+ },
+ },
+};
+
+static struct clk_branch mss_axi_crypto_clk = {
+ .halt_reg = 0x20cc,
+ .halt_check = BRANCH_HALT,
+ .clkr = {
+ .enable_reg = 0x20cc,
+ .enable_mask = BIT(0),
+ .hw.init = &(struct clk_init_data){
+ .name = "mss_axi_crypto_clk",
+ .parent_data = &(const struct clk_parent_data){
+ .fw_name = "gcc_mss_mfab_axis_clk",
+ },
+ .num_parents = 1,
+ .ops = &clk_branch2_ops,
+ },
+ },
+};
+
+static struct regmap_config mss_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .fast_io = true,
+};
+
+static struct clk_regmap *mss_sc7180_clocks[] = {
+ [MSS_AXI_CRYPTO_CLK] = &mss_axi_crypto_clk.clkr,
+ [MSS_AXI_NAV_CLK] = &mss_axi_nav_clk.clkr,
+};
+
+static const struct qcom_cc_desc mss_sc7180_desc = {
+ .config = &mss_regmap_config,
+ .clks = mss_sc7180_clocks,
+ .num_clks = ARRAY_SIZE(mss_sc7180_clocks),
+};
+
+static int mss_sc7180_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, "cfg_clk");
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to acquire iface clock\n");
+ goto destroy_pm_clk;
+ }
+
+ ret = qcom_cc_probe(pdev, &mss_sc7180_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 mss_sc7180_remove(struct platform_device *pdev)
+{
+ pm_clk_destroy(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+
+ return 0;
+}
+
+static const struct dev_pm_ops mss_sc7180_pm_ops = {
+ SET_RUNTIME_PM_OPS(pm_clk_suspend, pm_clk_resume, NULL)
+};
+
+static const struct of_device_id mss_sc7180_match_table[] = {
+ { .compatible = "qcom,sc7180-mss" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, mss_sc7180_match_table);
+
+static struct platform_driver mss_sc7180_driver = {
+ .probe = mss_sc7180_probe,
+ .remove = mss_sc7180_remove,
+ .driver = {
+ .name = "sc7180-mss",
+ .of_match_table = mss_sc7180_match_table,
+ .pm = &mss_sc7180_pm_ops,
+ },
+};
+
+static int __init mss_sc7180_init(void)
+{
+ return platform_driver_register(&mss_sc7180_driver);
+}
+subsys_initcall(mss_sc7180_init);
+
+static void __exit mss_sc7180_exit(void)
+{
+ platform_driver_unregister(&mss_sc7180_driver);
+}
+module_exit(mss_sc7180_exit);
+
+MODULE_DESCRIPTION("QTI MSS SC7180 Driver");
+MODULE_LICENSE("GPL v2");
--
Qualcomm INDIA, on behalf of Qualcomm Innovation Center, Inc.is a member
of the Code Aurora Forum, hosted by the Linux Foundation.
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