[PATCH] clk: qcom: Add basic support for APQ8064 global clock controller clocks

[Mike Turquette]

Quoting Kumar Gala (2014-04-04 09:31:29)
> The APQ8064 and MSM8960 share a significant amount of clock data and
> code between the two SoCs.  Rather than duplicating the data we just add
> support for a unqiue APQ8064 clock table into the MSM8960 code.
> 
> For now add just enough clocks to get a basic serial port going on an
> APQ8064 device.
> 
> Signed-off-by: Kumar Gala <galak at codeaurora.org>

Taken into clk-next. I don't have ipq8064 support in my tree so there
was a trivial conflict in the first stanza of the patch.

Regards,
Mike

> ---
> 
> This patch is based on Stephen's qcom common clk init conslidation patch
> 
>  .../devicetree/bindings/clock/qcom,gcc.txt         |  1 +
>  drivers/clk/qcom/Kconfig                           |  4 +--
>  drivers/clk/qcom/gcc-msm8960.c                     | 30 +++++++++++++++++++---
>  3 files changed, 30 insertions(+), 5 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/clock/qcom,gcc.txt b/Documentation/devicetree/bindings/clock/qcom,gcc.txt
> index 74974d6..25ae79c 100644
> --- a/Documentation/devicetree/bindings/clock/qcom,gcc.txt
> +++ b/Documentation/devicetree/bindings/clock/qcom,gcc.txt
> @@ -4,6 +4,7 @@ Qualcomm Global Clock & Reset Controller Binding
>  Required properties :
>  - compatible : shall contain only one of the following:
>  
> +                       "qcom,gcc-apq8064"
>                         "qcom,gcc-ipq8064"
>                         "qcom,gcc-msm8660"
>                         "qcom,gcc-msm8960"
> diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig
> index 5d81f7d..4b1f2d7 100644
> --- a/drivers/clk/qcom/Kconfig
> +++ b/drivers/clk/qcom/Kconfig
> @@ -21,10 +21,10 @@ config MSM_GCC_8660
>           i2c, USB, SD/eMMC, etc.
>  
>  config MSM_GCC_8960
> -       tristate "MSM8960 Global Clock Controller"
> +       tristate "APQ8064/MSM8960 Global Clock Controller"
>         depends on COMMON_CLK_QCOM
>         help
> -         Support for the global clock controller on msm8960 devices.
> +         Support for the global clock controller on apq8064/msm8960 devices.
>           Say Y if you want to use peripheral devices such as UART, SPI,
>           i2c, USB, SD/eMMC, SATA, PCIe, etc.
>  
> diff --git a/drivers/clk/qcom/gcc-msm8960.c b/drivers/clk/qcom/gcc-msm8960.c
> index 633b019..8e2b6dd 100644
> --- a/drivers/clk/qcom/gcc-msm8960.c
> +++ b/drivers/clk/qcom/gcc-msm8960.c
> @@ -1,5 +1,5 @@
>  /*
> - * Copyright (c) 2013, The Linux Foundation. All rights reserved.
> + * Copyright (c) 2013-2014, 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
> @@ -2868,6 +2868,16 @@ static const struct qcom_reset_map gcc_msm8960_resets[] = {
>         [RIVA_RESET] = { 0x35e0 },
>  };
>  
> +static struct clk_regmap *gcc_apq8064_clks[] = {
> +       [PLL8] = &pll8.clkr,
> +       [PLL8_VOTE] = &pll8_vote,
> +       [GSBI7_UART_SRC] = &gsbi7_uart_src.clkr,
> +       [GSBI7_UART_CLK] = &gsbi7_uart_clk.clkr,
> +       [GSBI7_QUP_SRC] = &gsbi7_qup_src.clkr,
> +       [GSBI7_QUP_CLK] = &gsbi7_qup_clk.clkr,
> +       [GSBI7_H_CLK] = &gsbi7_h_clk.clkr,
> +};
> +
>  static const struct regmap_config gcc_msm8960_regmap_config = {
>         .reg_bits       = 32,
>         .reg_stride     = 4,
> @@ -2884,8 +2894,17 @@ static const struct qcom_cc_desc gcc_msm8960_desc = {
>         .num_resets = ARRAY_SIZE(gcc_msm8960_resets),
>  };
>  
> +static const struct qcom_cc_desc gcc_apq8064_desc = {
> +       .config = &gcc_msm8960_regmap_config,
> +       .clks = gcc_apq8064_clks,
> +       .num_clks = ARRAY_SIZE(gcc_apq8064_clks),
> +       .resets = gcc_msm8960_resets,
> +       .num_resets = ARRAY_SIZE(gcc_msm8960_resets),
> +};
> +
>  static const struct of_device_id gcc_msm8960_match_table[] = {
> -       { .compatible = "qcom,gcc-msm8960" },
> +       { .compatible = "qcom,gcc-msm8960", .data = &gcc_msm8960_desc },
> +       { .compatible = "qcom,gcc-apq8064", .data = &gcc_apq8064_desc },
>         { }
>  };
>  MODULE_DEVICE_TABLE(of, gcc_msm8960_match_table);
> @@ -2894,6 +2913,11 @@ static int gcc_msm8960_probe(struct platform_device *pdev)
>  {
>         struct clk *clk;
>         struct device *dev = &pdev->dev;
> +       const struct of_device_id *match;
> +
> +       match = of_match_device(gcc_msm8960_match_table, &pdev->dev);
> +       if (!match)
> +               return -EINVAL;
>  
>         /* Temporary until RPM clocks supported */
>         clk = clk_register_fixed_rate(dev, "cxo", NULL, CLK_IS_ROOT, 19200000);
> @@ -2904,7 +2928,7 @@ static int gcc_msm8960_probe(struct platform_device *pdev)
>         if (IS_ERR(clk))
>                 return PTR_ERR(clk);
>  
> -       return qcom_cc_probe(pdev, &gcc_msm8960_desc);
> +       return qcom_cc_probe(pdev, match->data);
>  }
>  
>  static int gcc_msm8960_remove(struct platform_device *pdev)
> -- 
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> hosted by The Linux Foundation
>