[PATCH 2/2] clk: qcom: Add MSM8916 RPM clock driver
From: Georgi Djakov
Date: Thu Jul 09 2015 - 08:19:52 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 | 20 +++
drivers/clk/qcom/Makefile | 1 +
drivers/clk/qcom/gcc-msm8916.c | 13 --
drivers/clk/qcom/rpmcc-msm8916.c | 183 ++++++++++++++++++++
include/dt-bindings/clock/qcom,rpmcc-msm8916.h | 44 +++++
5 files changed, 248 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..74569e006bef
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/qcom,rpmcc.txt
@@ -0,0 +1,20 @@
+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:
+ rpmcc: rpmcc {
+ compatible = "qcom,rpmcc-msm8916";
+ #clock-cells = <1>;
+ };
diff --git a/drivers/clk/qcom/Makefile b/drivers/clk/qcom/Makefile
index 4d14a73ee4ed..d2c155bb1035 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..930e85637338
--- /dev/null
+++ b/drivers/clk/qcom/rpmcc-msm8916.c
@@ -0,0 +1,183 @@
+/*
+ * 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/platform_device.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+#include "clk-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 1
+#define BB_CLK2_ID 2
+#define RF_CLK1_ID 4
+#define RF_CLK2_ID 5
+
+struct rpm_cc {
+ struct clk_onecell_data data;
+ struct clk *clks[];
+};
+
+/* SMD clocks */
+DEFINE_CLK_RPM_SMD(pcnoc_clk, pcnoc_a_clk, QCOM_SMD_RPM_BUS_CLK, PCNOC_ID, NULL);
+DEFINE_CLK_RPM_SMD(snoc_clk, snoc_a_clk, QCOM_SMD_RPM_BUS_CLK, SNOC_ID, NULL);
+DEFINE_CLK_RPM_SMD(bimc_clk, bimc_a_clk, QCOM_SMD_RPM_MEM_CLK, BIMC_ID, NULL);
+
+DEFINE_CLK_RPM_SMD_BRANCH(xo, xo_a, QCOM_SMD_RPM_MISC_CLK, CXO_ID, 19200000);
+DEFINE_CLK_RPM_SMD_QDSS(qdss_clk, qdss_a_clk, QCOM_SMD_RPM_MISC_CLK, QDSS_ID);
+
+/* SMD_XO_BUFFER */
+DEFINE_CLK_RPM_SMD_XO_BUFFER(bb_clk1, bb_clk1_a, BB_CLK1_ID);
+DEFINE_CLK_RPM_SMD_XO_BUFFER(bb_clk2, bb_clk2_a, BB_CLK2_ID);
+DEFINE_CLK_RPM_SMD_XO_BUFFER(rf_clk1, rf_clk1_a, RF_CLK1_ID);
+DEFINE_CLK_RPM_SMD_XO_BUFFER(rf_clk2, rf_clk2_a, RF_CLK2_ID);
+
+DEFINE_CLK_RPM_SMD_XO_BUFFER_PINCTRL(bb_clk1_pin, bb_clk1_a_pin, BB_CLK1_ID);
+DEFINE_CLK_RPM_SMD_XO_BUFFER_PINCTRL(bb_clk2_pin, bb_clk2_a_pin, BB_CLK2_ID);
+DEFINE_CLK_RPM_SMD_XO_BUFFER_PINCTRL(rf_clk1_pin, rf_clk1_a_pin, RF_CLK1_ID);
+DEFINE_CLK_RPM_SMD_XO_BUFFER_PINCTRL(rf_clk2_pin, rf_clk2_a_pin, RF_CLK2_ID);
+
+static struct clk_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_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_of_match[] = {
+ { .compatible = "qcom,rpmcc-msm8916" },
+ { },
+};
+
+static struct platform_driver rpmcc_msm8916_driver = {
+ .driver = {
+ .name = "qcom-rpmcc-msm8916",
+ .of_match_table = rpmcc_msm8916_of_match,
+ },
+ .probe = rpmcc_msm8916_probe,
+ .remove = rpmcc_msm8916_remove,
+};
+
+module_platform_driver(rpmcc_msm8916_driver);
+core_initcall(rpmcc_msm8916_driver_init);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Qualcomm MSM8916 RPM Clock Controller Driver");
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
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