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linux/drivers/clk/meson/meson8b.h

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meson: clk: Move register definitions to meson8b.h Move the register definitions into a separate header file to reflect the gxbb implementation. Signed-off-by: Alexander Müller <serveralex@gmail.com> Signed-off-by: Michael Turquette <mturquette@baylibre.com> Link: lkml.kernel.org/r/1472319654-59048-3-git-send-email-serveralex@gmail.com
2016-08-28 01:40:50 +08:00
/*
* Copyright (c) 2015 Endless Mobile, Inc.
* Author: Carlo Caione <carlo@endlessm.com>
*
* Copyright (c) 2016 BayLibre, Inc.
* Michael Turquette <mturquette@baylibre.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __MESON8B_H
#define __MESON8B_H
/*
* Clock controller register offsets
*
* Register offsets from the HardKernel[0] data sheet are listed in comment
* blocks below. Those offsets must be multiplied by 4 before adding them to
* the base address to get the right value
*
* [0] http://dn.odroid.com/S805/Datasheet/S805_Datasheet%20V0.8%2020150126.pdf
*/
meson: clk: Add support for clock gates This patch adds support for the meson8b clock gates. Most of them are disabled by Amlogic U-Boot, but need to be enabled for ethernet, USB and many other components. Signed-off-by: Alexander Müller <serveralex@gmail.com> Signed-off-by: Michael Turquette <mturquette@baylibre.com> Link: lkml.kernel.org/r/1472319654-59048-7-git-send-email-serveralex@gmail.com
2016-08-28 01:40:54 +08:00
#define HHI_GCLK_MPEG0 0x140 /* 0x50 offset in data sheet */
#define HHI_GCLK_MPEG1 0x144 /* 0x51 offset in data sheet */
#define HHI_GCLK_MPEG2 0x148 /* 0x52 offset in data sheet */
#define HHI_GCLK_OTHER 0x150 /* 0x54 offset in data sheet */
#define HHI_GCLK_AO 0x154 /* 0x55 offset in data sheet */
meson: clk: Rename register names according to Amlogic datasheet Signed-off-by: Alexander Müller <serveralex@gmail.com> Signed-off-by: Michael Turquette <mturquette@baylibre.com> Link: lkml.kernel.org/r/1472319654-59048-4-git-send-email-serveralex@gmail.com
2016-08-28 01:40:51 +08:00
#define HHI_SYS_CPU_CLK_CNTL1 0x15c /* 0x57 offset in data sheet */
#define HHI_MPEG_CLK_CNTL 0x174 /* 0x5d offset in data sheet */
clk: meson: meson8b: register the built-in reset controller The clock controller also includes some reset lines. This patch implements a reset controller to assert and de-assert these resets. The reset controller itself is registered early (through CLK_OF_DECLARE_DRIVER) because it is needed very early in the boot process (to start the secondary CPU cores). According to the public S805 datasheet there are two more reset bits in the HHI_SYS_CPU_CLK_CNTL0 register, which are not implemented by this patch (as these seem to be unused in Amlogic's vendor Linux kernel sources and their u-boot tree): - bit 15: GEN_DIV_SOFT_RESET - bit 14: SOFT_RESET All information was taken from the public S805 Datasheet and Amlogic's vendor GPL kernel sources. This patch is based on an earlier version submitted by Carlo Caione. Suggested-by: Carlo Caione <carlo@endlessm.com> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Reviewed-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2017-07-29 05:13:12 +08:00
#define HHI_VID_CLK_CNTL 0x17c /* 0x5f offset in data sheet */
#define HHI_VID_DIVIDER_CNTL 0x198 /* 0x66 offset in data sheet */
#define HHI_SYS_CPU_CLK_CNTL0 0x19c /* 0x67 offset in data sheet */
clk: meson: meson8b: add support for the NAND clocks This adds the NAND clocks (from the HHI_NAND_CLK_CNTL register) to the Meson8b clock driver. There are three NAND clocks: a gate which enables or disables the NAND clock, a mux and a divider (which divides the mux output). Unfortunately the public S805 datasheet does not document the mux parents. However, the vendor kernel has a few hints for us which allows us to make an educated guess about the clock parents. To do this we need to have a look at set_nand_core_clk() from the vendor's NAND driver (see [0]): - XTAL = (4<<9) | (1<<8) | 0 - 160MHz = (0<<9) | (1<<8) | 3) - 182MHz = (3<<9) | (1<<8) | 1) - 212MHz = (1<<9) | (1<<8) | 3) - 255MHz = (2<<9) | (1<<8) | 1) While there is a comment for the XTAL parent (which indicates that it should only be used for debugging) we have to do a bit of math for the other parents: target_freq * divider = rate of parent clock Bit 8 above is the enable bit, so we can ignore it here. Bits 11:9 are the mux index and bits 6:0 are the 0-based divider (so we need to add 1). This gives us: - mux 0 (160MHz * 4) = fclk_div4 (actual rate = 637.5MHz, off by 2.5MHz) - mux 1 (212MHz * 4) = fclk_div3 (actual rate = 850MHz, off by 2MHz) - mux 2 (255MHz * 2) = fclk_div5 (matches exactly 510MHz) - mux 3 (182MHz * 2) = fclk_div7 (actual rate = 346.3MHz, off by 0.3MHz) [0] https://github.com/khadas/linux/blob/9587681285cb/drivers/amlogic/amlnf/dev/amlnf_ctrl.c#L314 Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
2018-04-24 03:35:09 +08:00
#define HHI_NAND_CLK_CNTL 0x25c /* 0x97 offset in data sheet */
meson: clk: Rename register names according to Amlogic datasheet Signed-off-by: Alexander Müller <serveralex@gmail.com> Signed-off-by: Michael Turquette <mturquette@baylibre.com> Link: lkml.kernel.org/r/1472319654-59048-4-git-send-email-serveralex@gmail.com
2016-08-28 01:40:51 +08:00
#define HHI_MPLL_CNTL 0x280 /* 0xa0 offset in data sheet */
#define HHI_SYS_PLL_CNTL 0x300 /* 0xc0 offset in data sheet */
#define HHI_VID_PLL_CNTL 0x320 /* 0xc8 offset in data sheet */
meson: clk: Move register definitions to meson8b.h Move the register definitions into a separate header file to reflect the gxbb implementation. Signed-off-by: Alexander Müller <serveralex@gmail.com> Signed-off-by: Michael Turquette <mturquette@baylibre.com> Link: lkml.kernel.org/r/1472319654-59048-3-git-send-email-serveralex@gmail.com
2016-08-28 01:40:50 +08:00
clk: meson8b: add the mplls clocks 0, 1 and 2 Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Michael Turquette <mturquette@baylibre.com> Link: lkml.kernel.org/r/20170309104154.28295-8-jbrunet@baylibre.com
2017-03-09 18:41:52 +08:00
/*
* MPLL register offeset taken from the S905 datasheet. Vendor kernel source
* confirm these are the same for the S805.
*/
#define HHI_MPLL_CNTL 0x280 /* 0xa0 offset in data sheet */
#define HHI_MPLL_CNTL2 0x284 /* 0xa1 offset in data sheet */
#define HHI_MPLL_CNTL3 0x288 /* 0xa2 offset in data sheet */
#define HHI_MPLL_CNTL4 0x28C /* 0xa3 offset in data sheet */
#define HHI_MPLL_CNTL5 0x290 /* 0xa4 offset in data sheet */
#define HHI_MPLL_CNTL6 0x294 /* 0xa5 offset in data sheet */
#define HHI_MPLL_CNTL7 0x298 /* 0xa6 offset in data sheet */
#define HHI_MPLL_CNTL8 0x29C /* 0xa7 offset in data sheet */
#define HHI_MPLL_CNTL9 0x2A0 /* 0xa8 offset in data sheet */
#define HHI_MPLL_CNTL10 0x2A4 /* 0xa9 offset in data sheet */
clk: meson: Copy meson8b CLKID defines to private header file Only expose future CLKID constants if necessary. This patch removes CLK_NR_CLKS from the DT bindings but leaves all previously defined CLKIDs there to keep backward compatibility. Signed-off-by: Alexander Müller <serveralex@gmail.com> Signed-off-by: Michael Turquette <mturquette@baylibre.com> Link: lkml.kernel.org/r/1472319654-59048-5-git-send-email-serveralex@gmail.com
2016-08-28 01:40:52 +08:00
/*
* CLKID index values
*
* These indices are entirely contrived and do not map onto the hardware.
clk: meson8b: expose every clock in the bindings Expose all clocks which maybe used as DT bindings Only clock ids internal the controller remain un-exposed (none on this particular controller at the moment) Acked-by: Neil Armstrong <narmstrong@baylibre.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2017-07-31 19:38:31 +08:00
* It has now been decided to expose everything by default in the DT header:
* include/dt-bindings/clock/gxbb-clkc.h. Only the clocks ids we don't want
* to expose, such as the internal muxes and dividers of composite clocks,
* will remain defined here.
clk: meson: Copy meson8b CLKID defines to private header file Only expose future CLKID constants if necessary. This patch removes CLK_NR_CLKS from the DT bindings but leaves all previously defined CLKIDs there to keep backward compatibility. Signed-off-by: Alexander Müller <serveralex@gmail.com> Signed-off-by: Michael Turquette <mturquette@baylibre.com> Link: lkml.kernel.org/r/1472319654-59048-5-git-send-email-serveralex@gmail.com
2016-08-28 01:40:52 +08:00
*/
clk: meson: split divider and gate part of mpll The mpll clock is a kind of fractional divider which can gate. When the RW operation have been added, enable/disable ops have been mistakenly inserted in this driver. These ops are essentially a poor copy/paste of the generic gate ops. This change removes the gate ops from the mpll driver and inserts a generic gate clock on each mpll divider, simplifying the mpll driver and reducing code duplication. Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2018-02-12 22:58:43 +08:00
#define CLKID_MPLL0_DIV 96
#define CLKID_MPLL1_DIV 97
#define CLKID_MPLL2_DIV 98
clk: meson: rework meson8b cpu clock Instead of migrating meson cpu_clk to clk_regmap, like the other meson clock drivers, we take advantage of the massive rework to get rid of it completely, and solve (the first part) of the related FIXME notice. As pointed out in the code comments, the cpu_clk should be modeled with dividers and muxes it is made of, instead of one big composite clock. The cpu_clk was not working correctly to enable dvfs on meson8b. It hangs quite often when changing the cpu clock rate. This new implementation, based on simple elements improves the situation but the platform will still hang from time to time. This is not acceptable so, until we can make the mechanism around the cpu clock stable, the cpu clock subtree has been put in read-only mode, preventing any change of the cpu clock The notifier and read-write operation will be added back when we have a solution to the problem. Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2018-02-12 22:58:44 +08:00
#define CLKID_CPU_IN_SEL 99
#define CLKID_CPU_DIV2 100
#define CLKID_CPU_DIV3 101
#define CLKID_CPU_SCALE_DIV 102
#define CLKID_CPU_SCALE_OUT_SEL 103
clk: meson: add mpll pre-divider mpll clocks parent can actually be divided by 1 or 2. So far, this divider has always been set to 1, so the calculation was correct. Now that we know it exists, model the tree correctly. If we ever get a platform where the divider is different, we won't get into trouble Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2018-02-19 19:21:44 +08:00
#define CLKID_MPLL_PREDIV 104
clk: meson: add fdiv clock gates Fdiv fixed dividers clocks of the fixed_pll can actually gate independently. We never had an issue so far because these clocks were provided 'enabled' by the bootloader. Add these gates to enable/disable the clocks when required. Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2018-02-19 19:21:45 +08:00
#define CLKID_FCLK_DIV2_DIV 105
#define CLKID_FCLK_DIV3_DIV 106
#define CLKID_FCLK_DIV4_DIV 107
#define CLKID_FCLK_DIV5_DIV 108
#define CLKID_FCLK_DIV7_DIV 109
clk: meson: meson8b: add support for the NAND clocks This adds the NAND clocks (from the HHI_NAND_CLK_CNTL register) to the Meson8b clock driver. There are three NAND clocks: a gate which enables or disables the NAND clock, a mux and a divider (which divides the mux output). Unfortunately the public S805 datasheet does not document the mux parents. However, the vendor kernel has a few hints for us which allows us to make an educated guess about the clock parents. To do this we need to have a look at set_nand_core_clk() from the vendor's NAND driver (see [0]): - XTAL = (4<<9) | (1<<8) | 0 - 160MHz = (0<<9) | (1<<8) | 3) - 182MHz = (3<<9) | (1<<8) | 1) - 212MHz = (1<<9) | (1<<8) | 3) - 255MHz = (2<<9) | (1<<8) | 1) While there is a comment for the XTAL parent (which indicates that it should only be used for debugging) we have to do a bit of math for the other parents: target_freq * divider = rate of parent clock Bit 8 above is the enable bit, so we can ignore it here. Bits 11:9 are the mux index and bits 6:0 are the 0-based divider (so we need to add 1). This gives us: - mux 0 (160MHz * 4) = fclk_div4 (actual rate = 637.5MHz, off by 2.5MHz) - mux 1 (212MHz * 4) = fclk_div3 (actual rate = 850MHz, off by 2MHz) - mux 2 (255MHz * 2) = fclk_div5 (matches exactly 510MHz) - mux 3 (182MHz * 2) = fclk_div7 (actual rate = 346.3MHz, off by 0.3MHz) [0] https://github.com/khadas/linux/blob/9587681285cb/drivers/amlogic/amlnf/dev/amlnf_ctrl.c#L314 Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
2018-04-24 03:35:09 +08:00
#define CLKID_NAND_SEL 110
#define CLKID_NAND_DIV 111
clk: meson: split divider and gate part of mpll The mpll clock is a kind of fractional divider which can gate. When the RW operation have been added, enable/disable ops have been mistakenly inserted in this driver. These ops are essentially a poor copy/paste of the generic gate ops. This change removes the gate ops from the mpll driver and inserts a generic gate clock on each mpll divider, simplifying the mpll driver and reducing code duplication. Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2018-02-12 22:58:43 +08:00
clk: meson: meson8b: add support for the NAND clocks This adds the NAND clocks (from the HHI_NAND_CLK_CNTL register) to the Meson8b clock driver. There are three NAND clocks: a gate which enables or disables the NAND clock, a mux and a divider (which divides the mux output). Unfortunately the public S805 datasheet does not document the mux parents. However, the vendor kernel has a few hints for us which allows us to make an educated guess about the clock parents. To do this we need to have a look at set_nand_core_clk() from the vendor's NAND driver (see [0]): - XTAL = (4<<9) | (1<<8) | 0 - 160MHz = (0<<9) | (1<<8) | 3) - 182MHz = (3<<9) | (1<<8) | 1) - 212MHz = (1<<9) | (1<<8) | 3) - 255MHz = (2<<9) | (1<<8) | 1) While there is a comment for the XTAL parent (which indicates that it should only be used for debugging) we have to do a bit of math for the other parents: target_freq * divider = rate of parent clock Bit 8 above is the enable bit, so we can ignore it here. Bits 11:9 are the mux index and bits 6:0 are the 0-based divider (so we need to add 1). This gives us: - mux 0 (160MHz * 4) = fclk_div4 (actual rate = 637.5MHz, off by 2.5MHz) - mux 1 (212MHz * 4) = fclk_div3 (actual rate = 850MHz, off by 2MHz) - mux 2 (255MHz * 2) = fclk_div5 (matches exactly 510MHz) - mux 3 (182MHz * 2) = fclk_div7 (actual rate = 346.3MHz, off by 0.3MHz) [0] https://github.com/khadas/linux/blob/9587681285cb/drivers/amlogic/amlnf/dev/amlnf_ctrl.c#L314 Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
2018-04-24 03:35:09 +08:00
#define CLK_NR_CLKS 113
clk: meson: Copy meson8b CLKID defines to private header file Only expose future CLKID constants if necessary. This patch removes CLK_NR_CLKS from the DT bindings but leaves all previously defined CLKIDs there to keep backward compatibility. Signed-off-by: Alexander Müller <serveralex@gmail.com> Signed-off-by: Michael Turquette <mturquette@baylibre.com> Link: lkml.kernel.org/r/1472319654-59048-5-git-send-email-serveralex@gmail.com
2016-08-28 01:40:52 +08:00
clk: meson: meson8b: register the built-in reset controller The clock controller also includes some reset lines. This patch implements a reset controller to assert and de-assert these resets. The reset controller itself is registered early (through CLK_OF_DECLARE_DRIVER) because it is needed very early in the boot process (to start the secondary CPU cores). According to the public S805 datasheet there are two more reset bits in the HHI_SYS_CPU_CLK_CNTL0 register, which are not implemented by this patch (as these seem to be unused in Amlogic's vendor Linux kernel sources and their u-boot tree): - bit 15: GEN_DIV_SOFT_RESET - bit 14: SOFT_RESET All information was taken from the public S805 Datasheet and Amlogic's vendor GPL kernel sources. This patch is based on an earlier version submitted by Carlo Caione. Suggested-by: Carlo Caione <carlo@endlessm.com> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Reviewed-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2017-07-29 05:13:12 +08:00
/*
* include the CLKID and RESETID that have
* been made part of the stable DT binding
*/
clk: meson: Copy meson8b CLKID defines to private header file Only expose future CLKID constants if necessary. This patch removes CLK_NR_CLKS from the DT bindings but leaves all previously defined CLKIDs there to keep backward compatibility. Signed-off-by: Alexander Müller <serveralex@gmail.com> Signed-off-by: Michael Turquette <mturquette@baylibre.com> Link: lkml.kernel.org/r/1472319654-59048-5-git-send-email-serveralex@gmail.com
2016-08-28 01:40:52 +08:00
#include <dt-bindings/clock/meson8b-clkc.h>
clk: meson: meson8b: register the built-in reset controller The clock controller also includes some reset lines. This patch implements a reset controller to assert and de-assert these resets. The reset controller itself is registered early (through CLK_OF_DECLARE_DRIVER) because it is needed very early in the boot process (to start the secondary CPU cores). According to the public S805 datasheet there are two more reset bits in the HHI_SYS_CPU_CLK_CNTL0 register, which are not implemented by this patch (as these seem to be unused in Amlogic's vendor Linux kernel sources and their u-boot tree): - bit 15: GEN_DIV_SOFT_RESET - bit 14: SOFT_RESET All information was taken from the public S805 Datasheet and Amlogic's vendor GPL kernel sources. This patch is based on an earlier version submitted by Carlo Caione. Suggested-by: Carlo Caione <carlo@endlessm.com> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Reviewed-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2017-07-29 05:13:12 +08:00
#include <dt-bindings/reset/amlogic,meson8b-clkc-reset.h>
clk: meson: Copy meson8b CLKID defines to private header file Only expose future CLKID constants if necessary. This patch removes CLK_NR_CLKS from the DT bindings but leaves all previously defined CLKIDs there to keep backward compatibility. Signed-off-by: Alexander Müller <serveralex@gmail.com> Signed-off-by: Michael Turquette <mturquette@baylibre.com> Link: lkml.kernel.org/r/1472319654-59048-5-git-send-email-serveralex@gmail.com
2016-08-28 01:40:52 +08:00
meson: clk: Move register definitions to meson8b.h Move the register definitions into a separate header file to reflect the gxbb implementation. Signed-off-by: Alexander Müller <serveralex@gmail.com> Signed-off-by: Michael Turquette <mturquette@baylibre.com> Link: lkml.kernel.org/r/1472319654-59048-3-git-send-email-serveralex@gmail.com
2016-08-28 01:40:50 +08:00
#endif /* __MESON8B_H */