[PATCH v2 2/2] clk: qcom: Add MSM8916 RPM clock driver
From: Georgi Djakov
Date: Mon Aug 03 2015 - 12:48:34 EST
Add support for clocks that are controlled by the RPM processor
on Qualcomm msm8916 based platforms.
Signed-off-by: Georgi Djakov <georgi.djakov@xxxxxxxxxx>
---
.../devicetree/bindings/clock/qcom,rpmcc.txt | 35 ++++
drivers/clk/qcom/Kconfig | 1 +
drivers/clk/qcom/Makefile | 1 +
drivers/clk/qcom/gcc-msm8916.c | 13 --
drivers/clk/qcom/rpmcc-msm8916.c | 196 ++++++++++++++++++++
include/dt-bindings/clock/qcom,rpmcc-msm8916.h | 44 +++++
6 files changed, 277 insertions(+), 13 deletions(-)
create mode 100644 Documentation/devicetree/bindings/clock/qcom,rpmcc.txt
create mode 100644 drivers/clk/qcom/rpmcc-msm8916.c
create mode 100644 include/dt-bindings/clock/qcom,rpmcc-msm8916.h
diff --git a/Documentation/devicetree/bindings/clock/qcom,rpmcc.txt b/Documentation/devicetree/bindings/clock/qcom,rpmcc.txt
new file mode 100644
index 000000000000..bd0fd0cd50dc
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/qcom,rpmcc.txt
@@ -0,0 +1,35 @@
+Qualcomm RPM Clock Controller Binding
+------------------------------------------------
+The RPM is a dedicated hardware engine for managing the shared
+SoC resources in order to keep the lowest power profile. It
+communicates with other hardware subsystems via shared memory
+and accepts clock requests, aggregates the requests and turns
+the clocks on/off or scales them on demand.
+
+Required properties :
+- compatible : shall contain only one of the following:
+
+ "qcom,rpmcc-msm8916"
+
+- #clock-cells : shall contain 1
+
+Example:
+ smd {
+ compatible = "qcom,smd";
+
+ rpm {
+ interrupts = <0 168 1>;
+ qcom,ipc = <&apcs 8 0>;
+ qcom,smd-edge = <15>;
+
+ rpm_requests {
+ compatible = "qcom,rpm-msm8916";
+ qcom,smd-channels = "rpm_requests";
+
+ rpmcc: qcom,rpmcc {
+ compatible = "qcom,rpmcc-msm8916";
+ #clock-cells = <1>;
+ };
+ };
+ };
+ };
diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig
index e347b97aa9c7..edffb57a3aff 100644
--- a/drivers/clk/qcom/Kconfig
+++ b/drivers/clk/qcom/Kconfig
@@ -52,6 +52,7 @@ config MSM_GCC_8660
config MSM_GCC_8916
tristate "MSM8916 Global Clock Controller"
+ select QCOM_CLK_SMD_RPM
depends on COMMON_CLK_QCOM
help
Support for the global clock controller on msm8916 devices.
diff --git a/drivers/clk/qcom/Makefile b/drivers/clk/qcom/Makefile
index 33adf1d97da3..985c794608a7 100644
--- a/drivers/clk/qcom/Makefile
+++ b/drivers/clk/qcom/Makefile
@@ -17,6 +17,7 @@ obj-$(CONFIG_IPQ_GCC_806X) += gcc-ipq806x.o
obj-$(CONFIG_IPQ_LCC_806X) += lcc-ipq806x.o
obj-$(CONFIG_MSM_GCC_8660) += gcc-msm8660.o
obj-$(CONFIG_MSM_GCC_8916) += gcc-msm8916.o
+obj-$(CONFIG_MSM_GCC_8916) += rpmcc-msm8916.o
obj-$(CONFIG_MSM_GCC_8960) += gcc-msm8960.o
obj-$(CONFIG_MSM_LCC_8960) += lcc-msm8960.o
obj-$(CONFIG_MSM_GCC_8974) += gcc-msm8974.o
diff --git a/drivers/clk/qcom/gcc-msm8916.c b/drivers/clk/qcom/gcc-msm8916.c
index 3bf4fb3deef6..28ef2c771157 100644
--- a/drivers/clk/qcom/gcc-msm8916.c
+++ b/drivers/clk/qcom/gcc-msm8916.c
@@ -2820,19 +2820,6 @@ MODULE_DEVICE_TABLE(of, gcc_msm8916_match_table);
static int gcc_msm8916_probe(struct platform_device *pdev)
{
- struct clk *clk;
- struct device *dev = &pdev->dev;
-
- /* Temporary until RPM clocks supported */
- clk = clk_register_fixed_rate(dev, "xo", NULL, CLK_IS_ROOT, 19200000);
- if (IS_ERR(clk))
- return PTR_ERR(clk);
-
- clk = clk_register_fixed_rate(dev, "sleep_clk_src", NULL,
- CLK_IS_ROOT, 32768);
- if (IS_ERR(clk))
- return PTR_ERR(clk);
-
return qcom_cc_probe(pdev, &gcc_msm8916_desc);
}
diff --git a/drivers/clk/qcom/rpmcc-msm8916.c b/drivers/clk/qcom/rpmcc-msm8916.c
new file mode 100644
index 000000000000..60b2292dcd45
--- /dev/null
+++ b/drivers/clk/qcom/rpmcc-msm8916.c
@@ -0,0 +1,196 @@
+/*
+ * Copyright (c) 2015, Linaro Limited
+ * Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+#include "clk-smd-rpm.h"
+#include <dt-bindings/clock/qcom,rpmcc-msm8916.h>
+
+#define CXO_ID 0x0
+#define QDSS_ID 0x1
+#define BUS_SCALING 0x2
+
+#define PCNOC_ID 0x0
+#define SNOC_ID 0x1
+#define BIMC_ID 0x0
+
+#define BB_CLK1_ID 0x1
+#define BB_CLK2_ID 0x2
+#define RF_CLK1_ID 0x4
+#define RF_CLK2_ID 0x5
+
+struct rpm_cc {
+ struct clk_onecell_data data;
+ struct clk *clks[];
+};
+
+/* SMD clocks */
+DEFINE_CLK_SMD_RPM(pcnoc_clk, pcnoc_a_clk, QCOM_SMD_RPM_BUS_CLK, PCNOC_ID, NULL);
+DEFINE_CLK_SMD_RPM(snoc_clk, snoc_a_clk, QCOM_SMD_RPM_BUS_CLK, SNOC_ID, NULL);
+DEFINE_CLK_SMD_RPM(bimc_clk, bimc_a_clk, QCOM_SMD_RPM_MEM_CLK, BIMC_ID, NULL);
+
+DEFINE_CLK_SMD_RPM_BRANCH(xo, xo_a, QCOM_SMD_RPM_MISC_CLK, CXO_ID, 19200000);
+DEFINE_CLK_SMD_RPM_QDSS(qdss_clk, qdss_a_clk, QCOM_SMD_RPM_MISC_CLK, QDSS_ID);
+
+/* SMD_XO_BUFFER */
+DEFINE_CLK_SMD_RPM_XO_BUFFER(bb_clk1, bb_clk1_a, BB_CLK1_ID);
+DEFINE_CLK_SMD_RPM_XO_BUFFER(bb_clk2, bb_clk2_a, BB_CLK2_ID);
+DEFINE_CLK_SMD_RPM_XO_BUFFER(rf_clk1, rf_clk1_a, RF_CLK1_ID);
+DEFINE_CLK_SMD_RPM_XO_BUFFER(rf_clk2, rf_clk2_a, RF_CLK2_ID);
+
+DEFINE_CLK_SMD_RPM_XO_BUFFER_PINCTRL(bb_clk1_pin, bb_clk1_a_pin, BB_CLK1_ID);
+DEFINE_CLK_SMD_RPM_XO_BUFFER_PINCTRL(bb_clk2_pin, bb_clk2_a_pin, BB_CLK2_ID);
+DEFINE_CLK_SMD_RPM_XO_BUFFER_PINCTRL(rf_clk1_pin, rf_clk1_a_pin, RF_CLK1_ID);
+DEFINE_CLK_SMD_RPM_XO_BUFFER_PINCTRL(rf_clk2_pin, rf_clk2_a_pin, RF_CLK2_ID);
+
+static struct clk_smd_rpm *rpmcc_msm8916_clks[] = {
+ [RPM_XO_CLK_SRC] = &xo,
+ [RPM_XO_A_CLK_SRC] = &xo_a,
+ [RPM_PCNOC_CLK] = &pcnoc_clk,
+ [RPM_PCNOC_A_CLK] = &pcnoc_a_clk,
+ [RPM_SNOC_CLK] = &snoc_clk,
+ [RPM_SNOC_A_CLK] = &snoc_a_clk,
+ [RPM_BIMC_CLK] = &bimc_clk,
+ [RPM_BIMC_A_CLK] = &bimc_a_clk,
+ [RPM_QDSS_CLK] = &qdss_clk,
+ [RPM_QDSS_A_CLK] = &qdss_a_clk,
+ [RPM_BB_CLK1] = &bb_clk1,
+ [RPM_BB_CLK1_A] = &bb_clk1_a,
+ [RPM_BB_CLK2] = &bb_clk2,
+ [RPM_BB_CLK2_A] = &bb_clk2_a,
+ [RPM_RF_CLK1] = &rf_clk1,
+ [RPM_RF_CLK1_A] = &rf_clk1_a,
+ [RPM_RF_CLK2] = &rf_clk2,
+ [RPM_RF_CLK2_A] = &rf_clk2_a,
+ [RPM_BB_CLK1_PIN] = &bb_clk1_pin,
+ [RPM_BB_CLK1_A_PIN] = &bb_clk1_a_pin,
+ [RPM_BB_CLK2_PIN] = &bb_clk2_pin,
+ [RPM_BB_CLK2_A_PIN] = &bb_clk2_a_pin,
+ [RPM_RF_CLK1_PIN] = &rf_clk1_pin,
+ [RPM_RF_CLK1_A_PIN] = &rf_clk1_a_pin,
+ [RPM_RF_CLK2_PIN] = &rf_clk2_pin,
+ [RPM_RF_CLK2_A_PIN] = &rf_clk2_a_pin,
+};
+
+static int rpmcc_msm8916_probe(struct platform_device *pdev)
+{
+ struct clk **clks;
+ struct clk *clk;
+ struct rpm_cc *rcc;
+ struct qcom_smd_rpm *rpm;
+ struct clk_onecell_data *data;
+ int num_clks = ARRAY_SIZE(rpmcc_msm8916_clks);
+ int ret, i;
+
+ if (!pdev->dev.of_node)
+ return -ENODEV;
+
+ rpm = dev_get_drvdata(pdev->dev.parent);
+ if (!rpm) {
+ dev_err(&pdev->dev, "Unable to retrieve handle to RPM\n");
+ return -ENODEV;
+ }
+
+ ret = clk_smd_rpm_enable_scaling(rpm);
+ if (ret)
+ return ret;
+
+ rcc = devm_kzalloc(&pdev->dev, sizeof(*rcc) + sizeof(*clks) * num_clks,
+ GFP_KERNEL);
+ if (!rcc)
+ return -ENOMEM;
+
+ clks = rcc->clks;
+ data = &rcc->data;
+ data->clks = clks;
+ data->clk_num = num_clks;
+
+ clk = clk_register_fixed_rate(&pdev->dev, "sleep_clk_src", NULL,
+ CLK_IS_ROOT, 32768);
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+
+ for (i = 0; i < num_clks; i++) {
+ if (!rpmcc_msm8916_clks[i]) {
+ clks[i] = ERR_PTR(-ENOENT);
+ continue;
+ }
+
+ rpmcc_msm8916_clks[i]->rpm = rpm;
+ clk = devm_clk_register(&pdev->dev, &rpmcc_msm8916_clks[i]->hw);
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+
+ clks[i] = clk;
+ }
+
+ ret = of_clk_add_provider(pdev->dev.of_node, of_clk_src_onecell_get,
+ data);
+ if (ret)
+ return ret;
+
+ /* Hold a vote for max rates */
+ clk_set_rate(bimc_a_clk.hw.clk, INT_MAX);
+ clk_prepare_enable(bimc_a_clk.hw.clk);
+ clk_set_rate(bimc_clk.hw.clk, INT_MAX);
+ clk_prepare_enable(bimc_clk.hw.clk);
+ clk_set_rate(snoc_clk.hw.clk, INT_MAX);
+ clk_prepare_enable(snoc_clk.hw.clk);
+ clk_prepare_enable(xo.hw.clk);
+
+ return 0;
+}
+
+static int rpmcc_msm8916_remove(struct platform_device *pdev)
+{
+ of_clk_del_provider(pdev->dev.of_node);
+ return 0;
+}
+
+static const struct of_device_id rpmcc_msm8916_match_table[] = {
+ { .compatible = "qcom,rpmcc-msm8916" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, rpmcc_msm8916_match_table);
+
+static struct platform_driver rpmcc_msm8916_driver = {
+ .driver = {
+ .name = "qcom-rpmcc-msm8916",
+ .of_match_table = rpmcc_msm8916_match_table,
+ },
+ .probe = rpmcc_msm8916_probe,
+ .remove = rpmcc_msm8916_remove,
+};
+
+static int __init rpmcc_msm8916_init(void)
+{
+ return platform_driver_register(&rpmcc_msm8916_driver);
+}
+core_initcall(rpmcc_msm8916_init);
+
+static void __exit rpmcc_msm8916_exit(void)
+{
+ platform_driver_unregister(&rpmcc_msm8916_driver);
+}
+module_exit(rpmcc_msm8916_exit);
+
+MODULE_DESCRIPTION("Qualcomm MSM8916 RPM Clock Controller Driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:rpmcc-msm8916");
diff --git a/include/dt-bindings/clock/qcom,rpmcc-msm8916.h b/include/dt-bindings/clock/qcom,rpmcc-msm8916.h
new file mode 100644
index 000000000000..62d63940896a
--- /dev/null
+++ b/include/dt-bindings/clock/qcom,rpmcc-msm8916.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2015 Linaro Limited
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ */
+
+#ifndef _DT_BINDINGS_CLK_MSM_RPMCC_8916_H
+#define _DT_BINDINGS_CLK_MSM_RPMCC_8916_H
+
+#define RPM_XO_CLK_SRC 0
+#define RPM_XO_A_CLK_SRC 1
+#define RPM_PCNOC_CLK 2
+#define RPM_PCNOC_A_CLK 3
+#define RPM_SNOC_CLK 4
+#define RPM_SNOC_A_CLK 6
+#define RPM_BIMC_CLK 7
+#define RPM_BIMC_A_CLK 8
+#define RPM_QDSS_CLK 9
+#define RPM_QDSS_A_CLK 10
+#define RPM_BB_CLK1 11
+#define RPM_BB_CLK1_A 12
+#define RPM_BB_CLK2 13
+#define RPM_BB_CLK2_A 14
+#define RPM_RF_CLK1 15
+#define RPM_RF_CLK1_A 16
+#define RPM_RF_CLK2 17
+#define RPM_RF_CLK2_A 18
+#define RPM_BB_CLK1_PIN 19
+#define RPM_BB_CLK1_A_PIN 20
+#define RPM_BB_CLK2_PIN 21
+#define RPM_BB_CLK2_A_PIN 22
+#define RPM_RF_CLK1_PIN 23
+#define RPM_RF_CLK1_A_PIN 24
+#define RPM_RF_CLK2_PIN 25
+#define RPM_RF_CLK2_A_PIN 26
+
+#endif
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/