diff options
Diffstat (limited to 'target/linux/ipq806x/patches-3.18/141-clk-qcom-Add-KPSS-ACC-GCC-driver.patch')
| -rw-r--r-- | target/linux/ipq806x/patches-3.18/141-clk-qcom-Add-KPSS-ACC-GCC-driver.patch | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/target/linux/ipq806x/patches-3.18/141-clk-qcom-Add-KPSS-ACC-GCC-driver.patch b/target/linux/ipq806x/patches-3.18/141-clk-qcom-Add-KPSS-ACC-GCC-driver.patch new file mode 100644 index 0000000000..06b14d8b53 --- /dev/null +++ b/target/linux/ipq806x/patches-3.18/141-clk-qcom-Add-KPSS-ACC-GCC-driver.patch @@ -0,0 +1,205 @@ +Content-Type: text/plain; charset="utf-8" +MIME-Version: 1.0 +Content-Transfer-Encoding: 7bit +Subject: [v3,10/13] clk: qcom: Add KPSS ACC/GCC driver +From: Stephen Boyd <sboyd@codeaurora.org> +X-Patchwork-Id: 6063201 +Message-Id: <1426920332-9340-11-git-send-email-sboyd@codeaurora.org> +To: Mike Turquette <mturquette@linaro.org>, Stephen Boyd <sboyd@codeaurora.org> +Cc: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, + linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, + Viresh Kumar <viresh.kumar@linaro.org>, <devicetree@vger.kernel.org> +Date: Fri, 20 Mar 2015 23:45:29 -0700 + +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 | 95 ++++++++++++++++++++++ + 5 files changed, 139 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 +@@ -79,6 +79,14 @@ 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 +@@ -18,4 +18,5 @@ obj-$(CONFIG_MSM_GCC_8960) += gcc-msm896 + obj-$(CONFIG_MSM_GCC_8974) += gcc-msm8974.o + obj-$(CONFIG_MSM_MMCC_8960) += mmcc-msm8960.o + obj-$(CONFIG_MSM_MMCC_8974) += mmcc-msm8974.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 +1,95 @@ ++/* 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"); |