target/linux/ipq806x/patches/0167-clk-qcom-Add-HFPLL-driver.patch

   1 From 49134da893bc11e833e3d87139c57e3b84e65219 Mon Sep 17 00:00:00 2001
   2 From: Stephen Boyd <sboyd@codeaurora.org>
   3 Date: Thu, 19 Jun 2014 18:46:31 -0700
   4 Subject: [PATCH 167/182] clk: qcom: Add HFPLL driver
   5
   6 On some devices (MSM8974 for example), the HFPLLs are
   7 instantiated within the Krait processor subsystem as separate
   8 register regions. Add a driver for these PLLs so that we can
   9 provide HFPLL clocks for use by the system.
  10
  11 Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
  12 ---
  13  drivers/clk/qcom/Kconfig  |    8 ++++
  14  drivers/clk/qcom/Makefile |    1 +
  15  drivers/clk/qcom/hfpll.c  |  110 +++++++++++++++++++++++++++++++++++++++++++++
  16  3 files changed, 119 insertions(+)
  17  create mode 100644 drivers/clk/qcom/hfpll.c
  18
  19 diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig
  20 index cfaa54c..de8ba31 100644
  21 --- a/drivers/clk/qcom/Kconfig
  22 +++ b/drivers/clk/qcom/Kconfig
  23 @@ -53,3 +53,11 @@ config MSM_MMCC_8974
  24           Support for the multimedia clock controller on msm8974 devices.
  25           Say Y if you want to support multimedia devices such as display,
  26           graphics, video encode/decode, camera, etc.
  27 +
  28 +config QCOM_HFPLL
  29 +       tristate "High-Frequency PLL (HFPLL) Clock Controller"
  30 +       depends on COMMON_CLK_QCOM
  31 +       help
  32 +         Support for the high-frequency PLLs present on Qualcomm devices.
  33 +         Say Y if you want to support CPU frequency scaling on devices
  34 +         such as MSM8974, APQ8084, etc.
  35 diff --git a/drivers/clk/qcom/Makefile b/drivers/clk/qcom/Makefile
  36 index 93fd03f..d0d8e3d 100644
  37 --- a/drivers/clk/qcom/Makefile
  38 +++ b/drivers/clk/qcom/Makefile
  39 @@ -16,3 +16,4 @@ obj-$(CONFIG_MSM_GCC_8960) += gcc-msm8960.o
  40  obj-$(CONFIG_MSM_GCC_8974) += gcc-msm8974.o
  41  obj-$(CONFIG_MSM_MMCC_8960) += mmcc-msm8960.o
  42  obj-$(CONFIG_MSM_MMCC_8974) += mmcc-msm8974.o
  43 +obj-$(CONFIG_QCOM_HFPLL) += hfpll.o
  44 diff --git a/drivers/clk/qcom/hfpll.c b/drivers/clk/qcom/hfpll.c
  45 new file mode 100644
  46 index 0000000..701a377
  47 --- /dev/null
  48 +++ b/drivers/clk/qcom/hfpll.c
  49 @@ -0,0 +1,110 @@
  50 +/*
  51 + * Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
  52 + *
  53 + * This program is free software; you can redistribute it and/or modify
  54 + * it under the terms of the GNU General Public License version 2 and
  55 + * only version 2 as published by the Free Software Foundation.
  56 + *
  57 + * This program is distributed in the hope that it will be useful,
  58 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
  59 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  60 + * GNU General Public License for more details.
  61 + */
  62 +
  63 +#include <linux/kernel.h>
  64 +#include <linux/init.h>
  65 +#include <linux/module.h>
  66 +#include <linux/platform_device.h>
  67 +#include <linux/of.h>
  68 +#include <linux/clk.h>
  69 +#include <linux/clk-provider.h>
  70 +#include <linux/regmap.h>
  71 +
  72 +#include "clk-regmap.h"
  73 +#include "clk-hfpll.h"
  74 +
  75 +static const struct hfpll_data hdata = {
  76 +       .mode_reg = 0x00,
  77 +       .l_reg = 0x04,
  78 +       .m_reg = 0x08,
  79 +       .n_reg = 0x0c,
  80 +       .user_reg = 0x10,
  81 +       .config_reg = 0x14,
  82 +       .config_val = 0x430405d,
  83 +       .status_reg = 0x1c,
  84 +       .lock_bit = 16,
  85 +
  86 +       .user_val = 0x8,
  87 +       .user_vco_mask = 0x100000,
  88 +       .low_vco_max_rate = 1248000000,
  89 +       .min_rate = 537600000UL,
  90 +       .max_rate = 2900000000UL,
  91 +};
  92 +
  93 +static const struct of_device_id qcom_hfpll_match_table[] = {
  94 +       { .compatible = "qcom,hfpll" },
  95 +       { }
  96 +};
  97 +MODULE_DEVICE_TABLE(of, qcom_hfpll_match_table);
  98 +
  99 +static struct regmap_config hfpll_regmap_config = {
 100 +       .reg_bits       = 32,
 101 +       .reg_stride     = 4,
 102 +       .val_bits       = 32,
 103 +       .max_register   = 0x30,
 104 +       .fast_io        = true,
 105 +};
 106 +
 107 +static int qcom_hfpll_probe(struct platform_device *pdev)
 108 +{
 109 +       struct clk *clk;
 110 +       struct resource *res;
 111 +       struct device *dev = &pdev->dev;
 112 +       void __iomem *base;
 113 +       struct regmap *regmap;
 114 +       struct clk_hfpll *h;
 115 +       struct clk_init_data init = {
 116 +               .parent_names = (const char *[]){ "xo" },
 117 +               .num_parents = 1,
 118 +               .ops = &clk_ops_hfpll,
 119 +       };
 120 +
 121 +       h = devm_kzalloc(dev, sizeof(*h), GFP_KERNEL);
 122 +       if (!h)
 123 +               return -ENOMEM;
 124 +
 125 +       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 126 +       base = devm_ioremap_resource(dev, res);
 127 +       if (IS_ERR(base))
 128 +               return PTR_ERR(base);
 129 +
 130 +       regmap = devm_regmap_init_mmio(&pdev->dev, base, &hfpll_regmap_config);
 131 +       if (IS_ERR(regmap))
 132 +               return PTR_ERR(regmap);
 133 +
 134 +       if (of_property_read_string_index(dev->of_node, "clock-output-names",
 135 +                                                 0, &init.name))
 136 +               return -ENODEV;
 137 +
 138 +       h->d = &hdata;
 139 +       h->clkr.hw.init = &init;
 140 +       spin_lock_init(&h->lock);
 141 +
 142 +       clk = devm_clk_register_regmap(&pdev->dev, &h->clkr);
 143 +
 144 +       return PTR_ERR_OR_ZERO(clk);
 145 +}
 146 +
 147 +static struct platform_driver qcom_hfpll_driver = {
 148 +       .probe          = qcom_hfpll_probe,
 149 +       .driver         = {
 150 +               .name   = "qcom-hfpll",
 151 +               .owner  = THIS_MODULE,
 152 +               .of_match_table = qcom_hfpll_match_table,
 153 +       },
 154 +};
 155 +module_platform_driver(qcom_hfpll_driver);
 156 +
 157 +MODULE_DESCRIPTION("QCOM HFPLL Clock Driver");
 158 +MODULE_LICENSE("GPL v2");
 159 +MODULE_ALIAS("platform:qcom-hfpll");
 160 --
 161 1.7.10.4
 162