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Date: Mon, 5 Sep 2016 00:34:21 -0600
From: Chen-Yu Tsai <wens@...e.org>
To: Maxime Ripard <maxime.ripard@...e-electrons.com>
CC: Mike Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...eaurora.org>,
Chen-Yu Tsai <wens@...e.org>,
Hans de Goede <hdegoede@...hat.com>,
Mylene Josserand <mylene.josserand@...e-electrons.com>,
linux-clk <linux-clk@...r.kernel.org>,
devicetree <devicetree@...r.kernel.org>,
linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
linux-kernel <linux-kernel@...r.kernel.org>,
Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
Subject: Re: [PATCH 4/6] clk: sunxi-ng: Add A33 CCU support
Hi,
On Thu, Sep 1, 2016 at 10:16 PM, Maxime Ripard
<maxime.ripard@...e-electrons.com> wrote:
> This commit introduces the clocks found in the Allwinner A33 CCU.
>
> Since this SoC is very similar to the A23, and we share a significant share
> of the DTSI, the clock IDs that are going to be used will also be shared
> with the A23, hence the name of the various header files.
>
> Signed-off-by: Maxime Ripard <maxime.ripard@...e-electrons.com>
> ---
> .../devicetree/bindings/clock/sunxi-ccu.txt | 1 +
> drivers/clk/sunxi-ng/Kconfig | 12 +
> drivers/clk/sunxi-ng/Makefile | 1 +
> drivers/clk/sunxi-ng/ccu-sun8i-a23-a33.h | 63 ++
> drivers/clk/sunxi-ng/ccu-sun8i-a33.c | 772 +++++++++++++++++++++
> include/dt-bindings/clock/sun8i-a23-a33-ccu.h | 127 ++++
> include/dt-bindings/reset/sun8i-a23-a33-ccu.h | 87 +++
> 7 files changed, 1063 insertions(+)
> create mode 100644 drivers/clk/sunxi-ng/ccu-sun8i-a23-a33.h
> create mode 100644 drivers/clk/sunxi-ng/ccu-sun8i-a33.c
> create mode 100644 include/dt-bindings/clock/sun8i-a23-a33-ccu.h
> create mode 100644 include/dt-bindings/reset/sun8i-a23-a33-ccu.h
>
> diff --git a/Documentation/devicetree/bindings/clock/sunxi-ccu.txt b/Documentation/devicetree/bindings/clock/sunxi-ccu.txt
> index eac458720b28..8fd765ea3660 100644
> --- a/Documentation/devicetree/bindings/clock/sunxi-ccu.txt
> +++ b/Documentation/devicetree/bindings/clock/sunxi-ccu.txt
> @@ -4,6 +4,7 @@ Allwinner Clock Control Unit Binding
> Required properties :
> - compatible: must contain one of the following compatibles:
> - "allwinner,sun6i-a31-ccu"
> + - "allwinner,sun8i-a33-ccu"
> - "allwinner,sun8i-h3-ccu"
>
> - reg: Must contain the registers base address and length
> diff --git a/drivers/clk/sunxi-ng/Kconfig b/drivers/clk/sunxi-ng/Kconfig
> index c7258779daa8..dff3feff9c3c 100644
> --- a/drivers/clk/sunxi-ng/Kconfig
> +++ b/drivers/clk/sunxi-ng/Kconfig
> @@ -65,6 +65,18 @@ config SUN6I_A31_CCU
> select SUNXI_CCU_PHASE
> default MACH_SUN6I
>
> +config SUN8I_A33_CCU
> + bool "Support for the Allwinner A33 CCU"
> + select SUNXI_CCU_DIV
> + select SUNXI_CCU_MULT
> + select SUNXI_CCU_NK
> + select SUNXI_CCU_NKM
> + select SUNXI_CCU_NKMP
> + select SUNXI_CCU_NM
> + select SUNXI_CCU_MP
> + select SUNXI_CCU_PHASE
> + default MACH_SUN8I
> +
> config SUN8I_H3_CCU
> bool "Support for the Allwinner H3 CCU"
> select SUNXI_CCU_DIV
> diff --git a/drivers/clk/sunxi-ng/Makefile b/drivers/clk/sunxi-ng/Makefile
> index 462a5f8383ed..4f7e99fb433f 100644
> --- a/drivers/clk/sunxi-ng/Makefile
> +++ b/drivers/clk/sunxi-ng/Makefile
> @@ -19,4 +19,5 @@ obj-$(CONFIG_SUNXI_CCU_MP) += ccu_mp.o
>
> # SoC support
> obj-$(CONFIG_SUN6I_A31_CCU) += ccu-sun6i-a31.o
> +obj-$(CONFIG_SUN8I_A33_CCU) += ccu-sun8i-a33.o
> obj-$(CONFIG_SUN8I_H3_CCU) += ccu-sun8i-h3.o
> diff --git a/drivers/clk/sunxi-ng/ccu-sun8i-a23-a33.h b/drivers/clk/sunxi-ng/ccu-sun8i-a23-a33.h
> new file mode 100644
> index 000000000000..62c0f8d49ef8
> --- /dev/null
> +++ b/drivers/clk/sunxi-ng/ccu-sun8i-a23-a33.h
> @@ -0,0 +1,63 @@
> +/*
> + * Copyright 2016 Maxime Ripard
> + *
> + * Maxime Ripard <maxime.ripard@...e-electrons.com>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + *
> + * 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 _CCU_SUN8I_A23_A33_H_
> +#define _CCU_SUN8I_A23_A33_H_
> +
> +#include <dt-bindings/clock/sun8i-a23-a33-ccu.h>
> +#include <dt-bindings/reset/sun8i-a23-a33-ccu.h>
> +
> +#define CLK_PLL_CPUX 0
> +#define CLK_PLL_AUDIO_BASE 1
> +#define CLK_PLL_AUDIO 2
> +#define CLK_PLL_AUDIO_2X 3
> +#define CLK_PLL_AUDIO_4X 4
> +#define CLK_PLL_AUDIO_8X 5
> +#define CLK_PLL_VIDEO 6
> +#define CLK_PLL_VIDEO_2X 7
> +#define CLK_PLL_VE 8
> +#define CLK_PLL_DDR0 9
> +#define CLK_PLL_PERIPH 10
> +#define CLK_PLL_PERIPH_2X 11
> +#define CLK_PLL_GPU 12
> +#define CLK_PLL_MIPI 13
> +#define CLK_PLL_HSIC 14
> +#define CLK_PLL_DE 15
> +#define CLK_PLL_DDR1 16
> +#define CLK_PLL_DDR 17
> +
> +/* The CPUX clock is exported */
> +
> +#define CLK_AXI 19
> +#define CLK_AHB1 20
> +#define CLK_APB1 21
> +#define CLK_APB2 22
> +
> +/* All the bus gates are exported */
> +
> +/* The first part of the mod clocks is exported */
> +
> +#define CLK_DRAM 79
> +
> +/* Some more module clocks are exported */
> +
> +#define CLK_MBUS 95
> +
> +/* And the last module clocks are exported */
> +
> +#define CLK_NUMBER (CLK_ATS + 1)
> +
> +#endif /* _CCU_SUN8I_A23_A33_H_ */
> diff --git a/drivers/clk/sunxi-ng/ccu-sun8i-a33.c b/drivers/clk/sunxi-ng/ccu-sun8i-a33.c
> new file mode 100644
> index 000000000000..420bacb88e6e
> --- /dev/null
> +++ b/drivers/clk/sunxi-ng/ccu-sun8i-a33.c
> @@ -0,0 +1,772 @@
> +/*
> + * Copyright (c) 2016 Maxime Ripard. 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-provider.h>
> +#include <linux/of_address.h>
> +
> +#include "ccu_common.h"
> +#include "ccu_reset.h"
> +
> +#include "ccu_div.h"
> +#include "ccu_gate.h"
> +#include "ccu_mp.h"
> +#include "ccu_mult.h"
> +#include "ccu_nk.h"
> +#include "ccu_nkm.h"
> +#include "ccu_nkmp.h"
> +#include "ccu_nm.h"
> +#include "ccu_phase.h"
> +
> +#include "ccu-sun8i-a23-a33.h"
> +
> +static SUNXI_CCU_NKMP_WITH_GATE_LOCK(pll_cpux_clk, "pll-cpux",
> + "osc24M", 0x000,
> + 8, 5, /* N */
> + 4, 2, /* K */
> + 0, 2, /* M */
> + 16, 2, /* P */
Manual says there's no divider for P = 0x3.
You'll need a table here.
> + BIT(31), /* gate */
> + BIT(28), /* lock */
> + 0);
> +
> +/*
> + * The Audio PLL is supposed to have 4 outputs: 3 fixed factors from
> + * the base (2x, 4x and 8x), and one variable divider (the one true
> + * pll audio).
> + *
> + * We don't have any need for the variable divider for now, so we just
> + * hardcode it to match with the clock names
> + */
> +#define SUN8I_A33_PLL_AUDIO_REG 0x008
> +
> +static SUNXI_CCU_NM_WITH_GATE_LOCK(pll_audio_base_clk, "pll-audio-base",
> + "osc24M", 0x008,
> + 8, 7, /* N */
> + 0, 5, /* M */
> + BIT(31), /* gate */
> + BIT(28), /* lock */
> + CLK_SET_RATE_UNGATE);
Are you sure about this? I suspect CLK_SET_RATE_GATE (clk must be
gated before set rate) is what you want, given the non-DVFS
nature of the PLL. Same for the other PLLs.
[...]
> +static SUNXI_CCU_GATE(bus_mipi_dsi_clk, "bus-mipi-dsi", "ahb1",
> + 0x060, BIT(1), 0);
Nit: we know which bus these peripherals are on.
Can we be more explicit with the names?
> +static SUNXI_CCU_GATE(bus_ce_clk, "bus-ce", "ahb1",
> + 0x060, BIT(5), 0);
Nit: manual says Security System.
(Maybe I should change the name on sun6i to say Crypto Engine
if that's what we're going with?)
[...]
> +static SUNXI_CCU_GATE(usb_hsic_12M_clk, "usb-hsic-12M", "osc24M",
> + 0x0cc, BIT(11), 0);
A TODO note saying we should have a fixed-factor-gate for this
would be nice.
[...]
> diff --git a/include/dt-bindings/clock/sun8i-a23-a33-ccu.h b/include/dt-bindings/clock/sun8i-a23-a33-ccu.h
> new file mode 100644
> index 000000000000..3782e56b84cd
> --- /dev/null
> +++ b/include/dt-bindings/clock/sun8i-a23-a33-ccu.h
> @@ -0,0 +1,127 @@
> +/*
> + * Copyright (C) 2016 Maxime Ripard <maxime.ripard@...e-electrons.com>
> + *
> + * This file is dual-licensed: you can use it either under the terms
> + * of the GPL or the X11 license, at your option. Note that this dual
> + * licensing only applies to this file, and not this project as a
> + * whole.
> + *
> + * a) This file is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License as
> + * published by the Free Software Foundation; either version 2 of the
> + * License, or (at your option) any later version.
> + *
> + * This file 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.
> + *
> + * Or, alternatively,
> + *
> + * b) Permission is hereby granted, free of charge, to any person
> + * obtaining a copy of this software and associated documentation
> + * files (the "Software"), to deal in the Software without
> + * restriction, including without limitation the rights to use,
> + * copy, modify, merge, publish, distribute, sublicense, and/or
> + * sell copies of the Software, and to permit persons to whom the
> + * Software is furnished to do so, subject to the following
> + * conditions:
> + *
> + * The above copyright notice and this permission notice shall be
> + * included in all copies or substantial portions of the Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
> + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
> + * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
> + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
> + * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
> + * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
> + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
> + * OTHER DEALINGS IN THE SOFTWARE.
> + */
> +
> +#ifndef _DT_BINDINGS_CLK_SUN8I_A23_A33_H_
> +#define _DT_BINDINGS_CLK_SUN8I_A23_A33_H_
> +
> +#define CLK_CPUX 18
> +
> +#define CLK_BUS_MIPI_DSI 23
> +#define CLK_BUS_CE 24
> +#define CLK_BUS_DMA 25
> +#define CLK_BUS_MMC0 26
> +#define CLK_BUS_MMC1 27
> +#define CLK_BUS_MMC2 28
> +#define CLK_BUS_NAND 29
> +#define CLK_BUS_DRAM 30
> +#define CLK_BUS_HSTIMER 31
> +#define CLK_BUS_SPI0 32
> +#define CLK_BUS_SPI1 33
> +#define CLK_BUS_OTG 34
> +#define CLK_BUS_EHCI 35
> +#define CLK_BUS_OHCI 36
> +#define CLK_BUS_VE 37
> +#define CLK_BUS_LCD 38
> +#define CLK_BUS_CSI 39
> +#define CLK_BUS_DE_BE 40
> +#define CLK_BUS_DE_FE 41
> +#define CLK_BUS_GPU 42
> +#define CLK_BUS_MSGBOX 43
> +#define CLK_BUS_SPINLOCK 44
> +#define CLK_BUS_DRC 45
> +#define CLK_BUS_SAT 46
> +#define CLK_BUS_CODEC 47
> +#define CLK_BUS_PIO 48
> +#define CLK_BUS_I2S0 49
> +#define CLK_BUS_I2S1 50
> +#define CLK_BUS_I2C0 51
> +#define CLK_BUS_I2C1 52
> +#define CLK_BUS_I2C2 53
> +#define CLK_BUS_UART0 54
> +#define CLK_BUS_UART1 55
> +#define CLK_BUS_UART2 56
> +#define CLK_BUS_UART3 57
> +#define CLK_BUS_UART4 58
Same with the bus name here.
> +#define CLK_NAND 59
> +#define CLK_MMC0 60
> +#define CLK_MMC0_SAMPLE 61
> +#define CLK_MMC0_OUTPUT 62
> +#define CLK_MMC1 63
> +#define CLK_MMC1_SAMPLE 64
> +#define CLK_MMC1_OUTPUT 65
> +#define CLK_MMC2 66
> +#define CLK_MMC2_SAMPLE 67
> +#define CLK_MMC2_OUTPUT 68
> +#define CLK_CE 69
> +#define CLK_SPI0 70
> +#define CLK_SPI1 71
> +#define CLK_I2S0 72
> +#define CLK_I2S1 73
> +#define CLK_USB_PHY0 74
> +#define CLK_USB_PHY1 75
> +#define CLK_USB_HSIC 76
> +#define CLK_USB_HSIC_12M 77
> +#define CLK_USB_OHCI 78
> +
> +#define CLK_DRAM_VE 80
> +#define CLK_DRAM_CSI 81
> +#define CLK_DRAM_DRC 82
> +#define CLK_DRAM_DE_FE 83
> +#define CLK_DRAM_DE_BE 84
> +#define CLK_DE_BE 85
> +#define CLK_DE_FE 86
> +#define CLK_LCD_CH0 87
> +#define CLK_LCD_CH1 88
> +#define CLK_CSI_SCLK 89
> +#define CLK_CSI_MCLK 90
> +#define CLK_VE 91
> +#define CLK_AC_DIG 92
> +#define CLK_AC_DIG_4X 93
> +#define CLK_AVS 94
> +
> +#define CLK_DSI_SCLK 96
> +#define CLK_DSI_DPHY 97
> +#define CLK_DRC 98
> +#define CLK_GPU 99
> +#define CLK_ATS 100
> +
> +#endif /* _DT_BINDINGS_CLK_SUN8I_A23_A33_H_ */
> diff --git a/include/dt-bindings/reset/sun8i-a23-a33-ccu.h b/include/dt-bindings/reset/sun8i-a23-a33-ccu.h
> new file mode 100644
> index 000000000000..03555a2f4175
> --- /dev/null
> +++ b/include/dt-bindings/reset/sun8i-a23-a33-ccu.h
> @@ -0,0 +1,87 @@
> +/*
> + * Copyright (C) 2016 Maxime Ripard <maxime.ripard@...e-electrons.com>
> + *
> + * This file is dual-licensed: you can use it either under the terms
> + * of the GPL or the X11 license, at your option. Note that this dual
> + * licensing only applies to this file, and not this project as a
> + * whole.
> + *
> + * a) This file is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License as
> + * published by the Free Software Foundation; either version 2 of the
> + * License, or (at your option) any later version.
> + *
> + * This file 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.
> + *
> + * Or, alternatively,
> + *
> + * b) Permission is hereby granted, free of charge, to any person
> + * obtaining a copy of this software and associated documentation
> + * files (the "Software"), to deal in the Software without
> + * restriction, including without limitation the rights to use,
> + * copy, modify, merge, publish, distribute, sublicense, and/or
> + * sell copies of the Software, and to permit persons to whom the
> + * Software is furnished to do so, subject to the following
> + * conditions:
> + *
> + * The above copyright notice and this permission notice shall be
> + * included in all copies or substantial portions of the Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
> + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
> + * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
> + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
> + * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
> + * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
> + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
> + * OTHER DEALINGS IN THE SOFTWARE.
> + */
> +
> +#ifndef _DT_BINDINGS_RST_SUN8I_A23_A33_H_
> +#define _DT_BINDINGS_RST_SUN8I_A23_A33_H_
> +
> +#define RST_USB_PHY0 0
> +#define RST_USB_PHY1 1
> +#define RST_USB_HSIC 2
> +#define RST_MBUS 3
> +#define RST_BUS_MIPI_DSI 4
> +#define RST_BUS_CE 5
> +#define RST_BUS_DMA 6
> +#define RST_BUS_MMC0 7
> +#define RST_BUS_MMC1 8
> +#define RST_BUS_MMC2 9
> +#define RST_BUS_NAND 10
> +#define RST_BUS_DRAM 11
> +#define RST_BUS_HSTIMER 12
> +#define RST_BUS_SPI0 13
> +#define RST_BUS_SPI1 14
> +#define RST_BUS_OTG 15
> +#define RST_BUS_EHCI 16
> +#define RST_BUS_OHCI 17
> +#define RST_BUS_VE 18
> +#define RST_BUS_LCD 19
> +#define RST_BUS_CSI 20
> +#define RST_BUS_DE_BE 21
> +#define RST_BUS_DE_FE 22
> +#define RST_BUS_GPU 23
> +#define RST_BUS_MSGBOX 24
> +#define RST_BUS_SPINLOCK 25
> +#define RST_BUS_DRC 26
> +#define RST_BUS_SAT 27
> +#define RST_BUS_LVDS 28
> +#define RST_BUS_CODEC 29
> +#define RST_BUS_I2S0 30
> +#define RST_BUS_I2S1 31
> +#define RST_BUS_I2C0 32
> +#define RST_BUS_I2C1 33
> +#define RST_BUS_I2C2 34
> +#define RST_BUS_UART0 35
> +#define RST_BUS_UART1 36
> +#define RST_BUS_UART2 37
> +#define RST_BUS_UART3 38
> +#define RST_BUS_UART4 39
Same with the bus name here.
Regards
ChenYu
> +
> +#endif /* _DT_BINDINGS_RST_SUN8I_A23_A33_H_ */
> --
> 2.9.2
>
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