clk: qcom: Add modem clock controller driver for SC7180

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>
Link: https://lkml.kernel.org/r/1584596131-22741-4-git-send-email-tdas@codeaurora.org
Tested-by: Sibi Sankar <sibis@codeaurora.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig
index af406a7c4acae59535fe661791f065b2b2dc6fd3..11ec6f46646782fe6be893757d9e28e63feabdc6 100644 (file)
--- a/drivers/clk/qcom/Kconfig
+++ b/drivers/clk/qcom/Kconfig
@@ -280,6 +280,15 @@ 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 bd6556b829c0f11f1d93794b7b33c3e9743ca478..691efbf7e81f055339aac590e0df4523284c2ce7 100644 (file)
--- a/drivers/clk/qcom/Makefile
+++ b/drivers/clk/qcom/Makefile
@@ -50,6 +50,7 @@ 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/mss-sc7180.c b/drivers/clk/qcom/mss-sc7180.c
new file mode 100644 (file)
index 0000000..673fa1a
--- /dev/null
+++ b/drivers/clk/qcom/mss-sc7180.c
@@ -0,0 +1,143 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2020, The Linux Foundation. All rights reserved.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/platform_device.h>
+#include <linux/module.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",
+                       },
+                       .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",
+                       },
+                       .num_parents = 1,
+                       .ops = &clk_branch2_ops,
+               },
+       },
+};
+
+static const struct regmap_config mss_regmap_config = {
+       .reg_bits       = 32,
+       .reg_stride     = 4,
+       .val_bits       = 32,
+       .fast_io        = true,
+       .max_register   = 0x41aa0cc,
+};
+
+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_ahb");
+       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");