+++ /dev/null
-From patchwork Fri Dec 8 09:42:26 2017
-Content-Type: text/plain; charset="utf-8"
-MIME-Version: 1.0
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-Subject: [v4,08/12] clk: qcom: Add KPSS ACC/GCC driver
-From: Sricharan R <sricharan@codeaurora.org>
-X-Patchwork-Id: 10102023
-Message-Id: <1512726150-7204-9-git-send-email-sricharan@codeaurora.org>
-To: mturquette@baylibre.com, sboyd@codeaurora.org,
- devicetree@vger.kernel.org, linux-pm@vger.kernel.org,
- linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org,
- viresh.kumar@linaro.org, linux-arm-kernel@lists.infradead.org
-Cc: sricharan@codeaurora.org
-Date: Fri, 8 Dec 2017 15:12:26 +0530
-
-From: Stephen Boyd <sboyd@codeaurora.org>
-
-The ACC and GCC regions present in KPSSv1 contain registers to
-control clocks and power to each Krait CPU and L2. For CPUfreq
-purposes probe these devices and expose a mux clock that chooses
-between PXO and PLL8.
-
-Cc: <devicetree@vger.kernel.org>
-Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
----
- .../devicetree/bindings/arm/msm/qcom,kpss-acc.txt | 7 ++
- .../devicetree/bindings/arm/msm/qcom,kpss-gcc.txt | 28 +++++++
- drivers/clk/qcom/Kconfig | 8 ++
- drivers/clk/qcom/Makefile | 1 +
- drivers/clk/qcom/kpss-xcc.c | 96 ++++++++++++++++++++++
- 5 files changed, 140 insertions(+)
- create mode 100644 Documentation/devicetree/bindings/arm/msm/qcom,kpss-gcc.txt
- create mode 100644 drivers/clk/qcom/kpss-xcc.c
-
---- a/Documentation/devicetree/bindings/arm/msm/qcom,kpss-acc.txt
-+++ b/Documentation/devicetree/bindings/arm/msm/qcom,kpss-acc.txt
-@@ -21,10 +21,17 @@ PROPERTIES
- the register region. An optional second element specifies
- the base address and size of the alias register region.
-
-+- clock-output-names:
-+ Usage: optional
-+ Value type: <string>
-+ Definition: Name of the output clock. Typically acpuX_aux where X is a
-+ CPU number starting at 0.
-+
- Example:
-
- clock-controller@2088000 {
- compatible = "qcom,kpss-acc-v2";
- reg = <0x02088000 0x1000>,
- <0x02008000 0x1000>;
-+ clock-output-names = "acpu0_aux";
- };
---- /dev/null
-+++ b/Documentation/devicetree/bindings/arm/msm/qcom,kpss-gcc.txt
-@@ -0,0 +1,28 @@
-+Krait Processor Sub-system (KPSS) Global Clock Controller (GCC)
-+
-+PROPERTIES
-+
-+- compatible:
-+ Usage: required
-+ Value type: <string>
-+ Definition: should be one of:
-+ "qcom,kpss-gcc"
-+
-+- reg:
-+ Usage: required
-+ Value type: <prop-encoded-array>
-+ Definition: base address and size of the register region
-+
-+- clock-output-names:
-+ Usage: required
-+ Value type: <string>
-+ Definition: Name of the output clock. Typically acpu_l2_aux indicating
-+ an L2 cache auxiliary clock.
-+
-+Example:
-+
-+ l2cc: clock-controller@2011000 {
-+ compatible = "qcom,kpss-gcc";
-+ reg = <0x2011000 0x1000>;
-+ clock-output-names = "acpu_l2_aux";
-+ };
---- a/drivers/clk/qcom/Kconfig
-+++ b/drivers/clk/qcom/Kconfig
-@@ -188,6 +188,14 @@ config QCOM_HFPLL
- Say Y if you want to support CPU frequency scaling on devices
- such as MSM8974, APQ8084, etc.
-
-+config KPSS_XCC
-+ tristate "KPSS Clock Controller"
-+ depends on COMMON_CLK_QCOM
-+ help
-+ Support for the Krait ACC and GCC clock controllers. Say Y
-+ if you want to support CPU frequency scaling on devices such
-+ as MSM8960, APQ8064, etc.
-+
- config KRAIT_CLOCKS
- bool
- select KRAIT_L2_ACCESSORS
---- a/drivers/clk/qcom/Makefile
-+++ b/drivers/clk/qcom/Makefile
-@@ -33,4 +33,5 @@ obj-$(CONFIG_MSM_MMCC_8974) += mmcc-msm8
- obj-$(CONFIG_MSM_MMCC_8996) += mmcc-msm8996.o
- obj-$(CONFIG_QCOM_CLK_RPM) += clk-rpm.o
- obj-$(CONFIG_QCOM_CLK_SMD_RPM) += clk-smd-rpm.o
-+obj-$(CONFIG_KPSS_XCC) += kpss-xcc.o
- obj-$(CONFIG_QCOM_HFPLL) += hfpll.o
---- /dev/null
-+++ b/drivers/clk/qcom/kpss-xcc.c
-@@ -0,0 +1,96 @@
-+/* Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 and
-+ * only version 2 as published by the Free Software Foundation.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ */
-+
-+#include <linux/kernel.h>
-+#include <linux/init.h>
-+#include <linux/module.h>
-+#include <linux/platform_device.h>
-+#include <linux/err.h>
-+#include <linux/io.h>
-+#include <linux/of.h>
-+#include <linux/of_device.h>
-+#include <linux/clk.h>
-+#include <linux/clk-provider.h>
-+
-+static const char *aux_parents[] = {
-+ "pll8_vote",
-+ "pxo",
-+};
-+
-+static unsigned int aux_parent_map[] = {
-+ 3,
-+ 0,
-+};
-+
-+static const struct of_device_id kpss_xcc_match_table[] = {
-+ { .compatible = "qcom,kpss-acc-v1", .data = (void *)1UL },
-+ { .compatible = "qcom,kpss-gcc" },
-+ {}
-+};
-+MODULE_DEVICE_TABLE(of, kpss_xcc_match_table);
-+
-+static int kpss_xcc_driver_probe(struct platform_device *pdev)
-+{
-+ const struct of_device_id *id;
-+ struct clk *clk;
-+ struct resource *res;
-+ void __iomem *base;
-+ const char *name;
-+
-+ id = of_match_device(kpss_xcc_match_table, &pdev->dev);
-+ if (!id)
-+ return -ENODEV;
-+
-+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-+ base = devm_ioremap_resource(&pdev->dev, res);
-+ if (IS_ERR(base))
-+ return PTR_ERR(base);
-+
-+ if (id->data) {
-+ if (of_property_read_string_index(pdev->dev.of_node,
-+ "clock-output-names",
-+ 0, &name))
-+ return -ENODEV;
-+ base += 0x14;
-+ } else {
-+ name = "acpu_l2_aux";
-+ base += 0x28;
-+ }
-+
-+ clk = clk_register_mux_table(&pdev->dev, name, aux_parents,
-+ ARRAY_SIZE(aux_parents), 0, base, 0, 0x3,
-+ 0, aux_parent_map, NULL);
-+
-+ platform_set_drvdata(pdev, clk);
-+
-+ return PTR_ERR_OR_ZERO(clk);
-+}
-+
-+static int kpss_xcc_driver_remove(struct platform_device *pdev)
-+{
-+ clk_unregister_mux(platform_get_drvdata(pdev));
-+ return 0;
-+}
-+
-+static struct platform_driver kpss_xcc_driver = {
-+ .probe = kpss_xcc_driver_probe,
-+ .remove = kpss_xcc_driver_remove,
-+ .driver = {
-+ .name = "kpss-xcc",
-+ .of_match_table = kpss_xcc_match_table,
-+ },
-+};
-+module_platform_driver(kpss_xcc_driver);
-+
-+MODULE_DESCRIPTION("Krait Processor Sub System (KPSS) Clock Driver");
-+MODULE_LICENSE("GPL v2");
-+MODULE_ALIAS("platform:kpss-xcc");
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