From: Sricharan R <sricharan@codeaurora.org>
To: viresh.kumar@linaro.org, robh+dt@kernel.org,
mark.rutland@arm.com, mturquette@baylibre.com,
sboyd@codeaurora.org, linux@armlinux.org.uk,
andy.gross@linaro.org, david.brown@linaro.org, rjw@rjwysocki.net,
linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org,
linux-arm-msm@vger.kernel.org, linux-soc@vger.kernel.org,
linux-pm@vger.kernel.org, robh@kernel.org
Cc: sricharan@codeaurora.org
Subject: [PATCH v7 04/15] clk: qcom: Add HFPLL driver
Date: Mon, 26 Feb 2018 15:23:20 +0530 [thread overview]
Message-ID: <1519638811-17269-5-git-send-email-sricharan@codeaurora.org> (raw)
In-Reply-To: <1519638811-17269-1-git-send-email-sricharan@codeaurora.org>
From: Stephen Boyd <sboyd@codeaurora.org>
On some devices (MSM8974 for example), the HFPLLs are
instantiated within the Krait processor subsystem as separate
register regions. Add a driver for these PLLs so that we can
provide HFPLL clocks for use by the system.
Cc: <devicetree@vger.kernel.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
---
drivers/clk/qcom/Kconfig | 8 ++++
drivers/clk/qcom/Makefile | 1 +
drivers/clk/qcom/hfpll.c | 96 +++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 105 insertions(+)
create mode 100644 drivers/clk/qcom/hfpll.c
diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig
index fbf4532..d9ae51e 100644
--- a/drivers/clk/qcom/Kconfig
+++ b/drivers/clk/qcom/Kconfig
@@ -226,3 +226,11 @@ config SPMI_PMIC_CLKDIV
Technologies, Inc. SPMI PMIC. It configures the frequency of
clkdiv outputs of the PMIC. These clocks are typically wired
through alternate functions on GPIO pins.
+
+config QCOM_HFPLL
+ tristate "High-Frequency PLL (HFPLL) Clock Controller"
+ depends on COMMON_CLK_QCOM
+ help
+ Support for the high-frequency PLLs present on Qualcomm devices.
+ Say Y if you want to support CPU frequency scaling on devices
+ such as MSM8974, APQ8084, etc.
diff --git a/drivers/clk/qcom/Makefile b/drivers/clk/qcom/Makefile
index a2b7888..c57b808 100644
--- a/drivers/clk/qcom/Makefile
+++ b/drivers/clk/qcom/Makefile
@@ -39,3 +39,4 @@ obj-$(CONFIG_QCOM_CLK_APCS_MSM8916) += apcs-msm8916.o
obj-$(CONFIG_QCOM_CLK_RPM) += clk-rpm.o
obj-$(CONFIG_QCOM_CLK_SMD_RPM) += clk-smd-rpm.o
obj-$(CONFIG_SPMI_PMIC_CLKDIV) += clk-spmi-pmic-div.o
+obj-$(CONFIG_QCOM_HFPLL) += hfpll.o
diff --git a/drivers/clk/qcom/hfpll.c b/drivers/clk/qcom/hfpll.c
new file mode 100644
index 0000000..a6de7101
--- /dev/null
+++ b/drivers/clk/qcom/hfpll.c
@@ -0,0 +1,96 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2018, The Linux Foundation. All rights reserved.
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/regmap.h>
+
+#include "clk-regmap.h"
+#include "clk-hfpll.h"
+
+static const struct hfpll_data hdata = {
+ .mode_reg = 0x00,
+ .l_reg = 0x04,
+ .m_reg = 0x08,
+ .n_reg = 0x0c,
+ .user_reg = 0x10,
+ .config_reg = 0x14,
+ .config_val = 0x430405d,
+ .status_reg = 0x1c,
+ .lock_bit = 16,
+
+ .user_val = 0x8,
+ .user_vco_mask = 0x100000,
+ .low_vco_max_rate = 1248000000,
+ .min_rate = 537600000UL,
+ .max_rate = 2900000000UL,
+};
+
+static const struct of_device_id qcom_hfpll_match_table[] = {
+ { .compatible = "qcom,hfpll" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, qcom_hfpll_match_table);
+
+static const struct regmap_config hfpll_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .max_register = 0x30,
+ .fast_io = true,
+};
+
+static int qcom_hfpll_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+ struct device *dev = &pdev->dev;
+ void __iomem *base;
+ struct regmap *regmap;
+ struct clk_hfpll *h;
+ struct clk_init_data init = {
+ .parent_names = (const char *[]){ "xo" },
+ .num_parents = 1,
+ .ops = &clk_ops_hfpll,
+ };
+
+ h = devm_kzalloc(dev, sizeof(*h), GFP_KERNEL);
+ if (!h)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ regmap = devm_regmap_init_mmio(&pdev->dev, base, &hfpll_regmap_config);
+ if (IS_ERR(regmap))
+ return PTR_ERR(regmap);
+
+ if (of_property_read_string_index(dev->of_node, "clock-output-names",
+ 0, &init.name))
+ return -ENODEV;
+
+ h->d = &hdata;
+ h->clkr.hw.init = &init;
+ spin_lock_init(&h->lock);
+
+ return devm_clk_register_regmap(&pdev->dev, &h->clkr);
+}
+
+static struct platform_driver qcom_hfpll_driver = {
+ .probe = qcom_hfpll_probe,
+ .driver = {
+ .name = "qcom-hfpll",
+ .of_match_table = qcom_hfpll_match_table,
+ },
+};
+module_platform_driver(qcom_hfpll_driver);
+
+MODULE_DESCRIPTION("QCOM HFPLL Clock Driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:qcom-hfpll");
--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
next prev parent reply other threads:[~2018-02-26 9:54 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-26 9:53 [PATCH v7 00/15] Krait clocks + Krait CPUfreq Sricharan R
2018-02-26 9:53 ` [PATCH v7 01/15] ARM: Add Krait L2 register accessor functions Sricharan R
2018-02-26 9:53 ` [PATCH v7 02/15] clk: mux: Split out register accessors for reuse Sricharan R
2018-02-26 9:53 ` [PATCH v7 03/15] clk: qcom: Add support for High-Frequency PLLs (HFPLLs) Sricharan R
2018-02-26 9:53 ` Sricharan R [this message]
2018-02-26 9:53 ` [PATCH v7 05/15] dt-bindings: clock: Document qcom,hfpll Sricharan R
2018-02-26 9:53 ` [PATCH v7 06/15] clk: qcom: Add MSM8960/APQ8064's HFPLLs Sricharan R
2018-02-26 9:53 ` [PATCH v7 07/15] clk: qcom: Add IPQ806X's HFPLLs Sricharan R
2018-02-26 9:53 ` [PATCH v7 08/15] clk: qcom: Add support for Krait clocks Sricharan R
2018-02-26 9:53 ` [PATCH v7 09/15] clk: qcom: Add KPSS ACC/GCC driver Sricharan R
2018-02-26 9:53 ` [PATCH v7 10/15] dt-bindings: arm: Document qcom,kpss-gcc Sricharan R
2018-02-26 9:53 ` [PATCH v7 11/15] clk: qcom: Add Krait clock controller driver Sricharan R
2018-02-26 9:53 ` [PATCH v7 12/15] dt-bindings: clock: Document qcom,krait-cc Sricharan R
2018-02-26 9:53 ` [PATCH v7 13/15] clk: qcom: Add safe switch hook for krait mux clocks Sricharan R
2018-02-26 9:53 ` [PATCH v7 14/15] cpufreq: Add module to register cpufreq on Krait CPUs Sricharan R
2018-02-26 10:04 ` Viresh Kumar
2018-02-26 10:15 ` Sricharan R
2018-03-14 16:45 ` Stephen Boyd
2018-02-26 9:53 ` [PATCH v7 15/15] dt-bindings: cpufreq: Document operating-points-v2-krait-cpu Sricharan R
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