Re: [PATCH 04/22] clk: mediatek: Add MT8195 basic clocks support

From: Chun-Jie Chen
Date: Wed Aug 11 2021 - 00:34:36 EST

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On Thu, 2021-07-22 at 15:44 +0800, Chen-Yu Tsai wrote:
> Hi,
>
> It seems your reply included HTML, which means that it never reached
> the mailing lists. Please always use plaintext only.
>
> On Thu, Jul 22, 2021 at 08:17:40AM +0800, Chun-Jie Chen wrote:
> > On Fri, 2021-07-02 at 19:44 +0800, Chen-Yu Tsai wrote:
> > > > On Thu, Jun 17, 2021 at 7:05 AM Chun-Jie Chen
> > > > <chun-jie.chen@xxxxxxxxxxxx> wrote:
> > > > > >
> > > > > > Add MT8195 basic clock providers, include topckgen,
> > > > > > apmixedsys,
> > > > > > infracfg_ao and pericfg_ao.
> > > > > >
> > > > > > Signed-off-by: Chun-Jie Chen <chun-jie.chen@xxxxxxxxxxxx>
> > > > > > ---
> > > > > > drivers/clk/mediatek/Kconfig | 8 +
> > > > > > drivers/clk/mediatek/Makefile | 1 +
> > > > > > drivers/clk/mediatek/clk-mt8195.c | 1958
> > > > > > +++++++++++++++++++++++++++++
> > > > > > 3 files changed, 1967 insertions(+)
> > > > > > create mode 100644 drivers/clk/mediatek/clk-mt8195.c
> > > > > >
> > > > > > diff --git a/drivers/clk/mediatek/Kconfig
> > > > > > b/drivers/clk/mediatek/Kconfig
> > > > > > index 576babd86f98..6707aba3d500 100644
> > > > > > --- a/drivers/clk/mediatek/Kconfig
> > > > > > +++ b/drivers/clk/mediatek/Kconfig
> > > > > > @@ -580,6 +580,14 @@ config COMMON_CLK_MT8192_VENCSYS
> > > > > > help
> > > > > > This driver supports MediaTek MT8192 vencsys
> > > > > > clocks.
> > > > > >
> > > > > > +config COMMON_CLK_MT8195
> > > > > > + bool "Clock driver for MediaTek MT8195"
> > > > > > + depends on ARM64 || COMPILE_TEST
> > > > > > + select COMMON_CLK_MEDIATEK
> > > > > > + default ARM64
> > > > > > + help
> > > > > > + This driver supports MediaTek MT8195 basic
> > > > > > clocks.
> > > > > > +
> > > > > > config COMMON_CLK_MT8516
> > > > > > bool "Clock driver for MediaTek MT8516"
> > > > > > depends on ARCH_MEDIATEK || COMPILE_TEST
> > > > > > diff --git a/drivers/clk/mediatek/Makefile
> > > > > > b/drivers/clk/mediatek/Makefile
> > > > > > index 15bc045f0b71..f8002d8966e1 100644
> > > > > > --- a/drivers/clk/mediatek/Makefile
> > > > > > +++ b/drivers/clk/mediatek/Makefile
> > > > > > @@ -80,5 +80,6 @@ obj-$(CONFIG_COMMON_CLK_MT8192_MSDC) +=
> > > > > > clk-
> > > > > > mt8192-msdc.o
> > > > > > obj-$(CONFIG_COMMON_CLK_MT8192_SCP_ADSP) +=
> > > >
> > > > clk-mt8192-scp_adsp.o
> > > > > > obj-$(CONFIG_COMMON_CLK_MT8192_VDECSYS) += clk-mt8192-
> > > > > > vdec.o
> > > > > > obj-$(CONFIG_COMMON_CLK_MT8192_VENCSYS) += clk-mt8192-
> > > > > > venc.o
> > > > > > +obj-$(CONFIG_COMMON_CLK_MT8195) += clk-mt8195.o
> > > > > > obj-$(CONFIG_COMMON_CLK_MT8516) += clk-mt8516.o
> > > > > > obj-$(CONFIG_COMMON_CLK_MT8516_AUDSYS) += clk-mt8516-aud.o
> > > > > > diff --git a/drivers/clk/mediatek/clk-mt8195.c
> > > > > > b/drivers/clk/mediatek/clk-mt8195.c
> > > > > > new file mode 100644
> > > > > > index 000000000000..aea9ebe4c051
> > > > > > --- /dev/null
> > > > > > +++ b/drivers/clk/mediatek/clk-mt8195.c
> > > > > > @@ -0,0 +1,1958 @@
> > > > > > +// SPDX-License-Identifier: GPL-2.0-only
> > > > > > +//
> > > > > > +// Copyright (c) 2021 MediaTek Inc.
> > > > > > +// Author: Chun-Jie Chen <chun-jie.chen@xxxxxxxxxxxx>
> > > > > > +
> > > > > > +#include <linux/clk.h>
> > > > > > +#include <linux/delay.h>
> > > > > > +#include <linux/mfd/syscon.h>
> > > > > > +#include <linux/of.h>
> > > > > > +#include <linux/of_address.h>
> > > > > > +#include <linux/of_device.h>
> > > > > > +#include <linux/platform_device.h>
> > > > > > +#include <linux/slab.h>
> > > > > > +
> > > > > > +#include "clk-mtk.h"
> > > > > > +#include "clk-mux.h"
> > > > > > +#include "clk-gate.h"
> > > > > > +
> > > > > > +#include <dt-bindings/clock/mt8195-clk.h>
> > > > > > +
> > > > > > +static DEFINE_SPINLOCK(mt8195_clk_lock);
> > > > > > +
> > > > > > +static const struct mtk_fixed_clk top_fixed_clks[] = {
> > > > > > + FIXED_CLK(CLK_TOP_IN_DGI, "in_dgi", NULL,
> > > > > > 165000000),
> > > > > > + FIXED_CLK(CLK_TOP_ULPOSC, "ulposc", NULL,
> > > > > > 248000000),
> > > > > > + FIXED_CLK(CLK_TOP_ULPOSC2, "ulposc2", NULL,
> > > > > > 326000000),
> > > > > > + FIXED_CLK(CLK_TOP_MEM_466M, "mem_466m", NULL,
> > > >
> > > > 533000000),
> > > > > > + FIXED_CLK(CLK_TOP_MPHONE_SLAVE_B, "mphone_slave_b",
> > > >
> > > > NULL,
> > > > > > 49152000),
> > > > > > + FIXED_CLK(CLK_TOP_PEXTP_PIPE, "pextp_pipe", NULL,
> > > > > > 250000000),
> > > > > > + FIXED_CLK(CLK_TOP_UFS_RX_SYMBOL, "ufs_rx_symbol",
> > > > > > NULL,
> > > > > > 166000000),
> > > > > > + FIXED_CLK(CLK_TOP_UFS_TX_SYMBOL, "ufs_tx_symbol",
> > > > > > NULL,
> > > > > > 166000000),
> > > > > > + FIXED_CLK(CLK_TOP_SSUSB_U3PHY_P1_P_P0,
> > > > > > "ssusb_u3phy_p1_p_p0", NULL, 131000000),
> > > > > > + FIXED_CLK(CLK_TOP_UFS_RX_SYMBOL1, "ufs_rx_symbol1",
> > > >
> > > > NULL,
> > > > > > 166000000),
> > > > > > + FIXED_CLK(CLK_TOP_FPC, "fpc", NULL, 50000000),
> > > > > > + FIXED_CLK(CLK_TOP_HDMIRX_P, "hdmirx_p", NULL,
> > > >
> > > > 594000000),
> > > >
> > > > I assume these are fixed PLLs? They should have inputs
> > > > (parents).
> > > >
> > > > Moreover, at least ULPOSC and ULPOSC2 look like they are in
> > > > APMIXEDSYS
> > > >
> >
> > The clock in top_fixed_clks is special clock that generated from
> > the
> > specific hardware block, not PLLs in APMIXEDSYS. ULPOSC and ULPOSC2
> > has
> > configuration register in APMIXEDSYS, but their clock source are
> > not
> > "clk26m" (other plls in APMIXEDSYS in is generated from "clk26m")
>
> I see. Surely they have some input though. It would be nice to be
> able
> to have them described.
>
> > > > > > +};T
> > > > > > +
> > > > > > +static const struct mtk_fixed_factor top_early_divs[] = {
> > > > > > + FACTOR(CLK_TOP_CLK26M_D2, "clk26m_d2", "clk26m", 1,
> > > > > > 2),
> > > > > > +};
> > > > > > +
> > > > > > +static const struct mtk_fixed_factor top_divs[] = {
> > > > > > + FACTOR(CLK_TOP_CLK26M_D52, "clk26m_d52", "clk26m",
> > > > > > 1,
> > > >
> > > > 52),
> > > > > > + FACTOR(CLK_TOP_IN_DGI_D2, "in_dgi_d2", "in_dgi", 1,
> > > > > > 2),
> > > > > > + FACTOR(CLK_TOP_IN_DGI_D4, "in_dgi_d4", "in_dgi", 1,
> > > > > > 4),
> > > > > > + FACTOR(CLK_TOP_IN_DGI_D6, "in_dgi_d6", "in_dgi", 1,
> > > > > > 6),
> > > > > > + FACTOR(CLK_TOP_IN_DGI_D8, "in_dgi_d8", "in_dgi", 1,
> > > > > > 8),
> > > > > > + FACTOR(CLK_TOP_MFGPLL_OPP, "mfgpll_opp", "mfgpll",
> > > > > > 1,
> > > >
> > > > 1),
> > > > > > + FACTOR(CLK_TOP_MAINPLL, "mainpll_ck", "mainpll", 1,
> > > > > > 1),
> > > >
> > > > Why are this and other 1:1 factor clks needed? They look like
> > > > placeholders.
> > > > Please remove them.
> >
> >
> >
> > These 1:1 factors make more readable between dividers. For example,
> > CLK_APMIXED_MAINPLL and CLK_TOP_MAINPLL_D3 is not easy to see the
> > relation, but CLK_TOP_MAINPLL and CLK_TOP_MAINPLL_D3 is more clear
> > to
> > see the relation.
>
> If the clocks are named appropriately, it should be clear that
> "mainpll_dX"
> is derived from "mainpll". We really don't need an extra "mainpll_ck"
> in
> between.
>
> The only thing gained here is having the parent clock in the same
> driver.
> But that is only a problem because we are directly using global clock
> names
> for parent names. This isn't the preferred way for clock parenting.
>
> For proper parenting, the driver should be using `struct
> clk_parent_data`
> if possible, or using of_clk_get_parent_name() or of_clk_get_hw()
> manually
> to get the parent's global name or a reference to it. This is
> something
> the clk drivers should slowly be converted to doing.
>
> I'm not saying we should do everything now, but we can start by
> getting
> rid of some of the excess baggage.
>
> [...]

Ok, I will remove the 1-to-1 divider in next version.
Thanks for your comment.

>
> > > > > > +static const char * const dsp7_parents[] = {
> > > > > > + "clk26m",
> > > > > > + "univpll_d6_d2",
> > > > > > + "univpll_d4_d2",
> > > > > > + "univpll_d5",
> > > > > > + "univpll_d4",
> > > > > > + "mmpll_d4",
> > > > > > + "mainpll_d3",
> > > > > > + "univpll_d3"
> > > > > > +};
> > > >
> > > > If dsp~dsp7_parents are all the same, please merge them and
> > > > share
> > >
> > > one
> > > > instance. And since they are located a bit far from the clock
> > > > definitions
> > > > in this file, please add comments describing which clocks share
> > > > the
> > > > same
> > > > set of parents.
> > > >
> >
> > I will merge it if they can share the same parent source data
> > (include
> > you mention below), thanks for your comment.
>
> Great!
>
> [...]
>
> Tip: You can trim out portions of the original email from your reply,
> like
> what I did here, so that the emails are shorter. Keeping just the
> bits that
> are relevant to the discussion is better for the reader. In cases
> here a
> lot of it are related cases, you could keep just the one nearest to
> your
> reply.
>
> > > > > > +static const char * const spinor_parents[] = {
> > > > > > + "clk26m",
> > > >
> > > > Datasheet says first parent is "univpll_d5_d8". Please check
> > > > with
> > > > hardware
> > > > engineers. If the datasheet is wrong please add a comment
> > > > saying so.
> > > >
> > >
> > >
> > > > > > + "clk26m_d2",
> > > > > > + "mainpll_d7_d8",
> > > > > > + "univpll_d6_d8"
> > > > > > +};
> > > > > > +
> >
> > The parent source here is correct, but not update to the latest in
> > datasheet.
>
> For future reference, could you leave a comment stating that the
> datasheet
> has not been updated then? Please include the version of the
> datasheet.
>

The parent source here was updated at v25 internal version.

> > > > > > +static const char * const dvio_dgi_ref_parents[] = {
> > > > > > + "clk26m",
> > > > > > + "in_dgi",
> > > > > > + "in_dgi_d2",
> > > > > > + "in_dgi_d4",
> > > > > > + "in_dgi_d6",
> > > > > > + "in_dgi_d8",
> > > > > > + "mmpll_d4_d4"
> > > > > > +};
> > > > > > +
> > > > > > +static const char * const srck_parents[] = {
> > > > > > + "ulposc_d10",
> > > > > > + "clk26m"
> > > > > > +};
> > > > > > +
> > > > > > +static const char * const rsvd1_parents[] = {
> > > > > > + "clk26m",
> > > > > > + "mainpll_d4_d4",
> > > > > > + "mainpll_d5_d4",
> > > > > > + "mainpll_d6_d4",
> > > > > > + "mainpll_d7_d4",
> > > > > > + "univpll_d6_d4",
> > > >
> > > > These are completely different from the datasheet. Please
> > > > check.
> > > >
> > >
> > >
> > > > > > + "ulposc",
> > > > > > + "ulposc2"
> > > > > > +};
> > > > > > +
> >
> > The parent source here is correct, but not update to the latest in
> > datasheet.
>
> Same for this one.
>

The parent source here was updated at v25 internal version.

> > > > > > +static const char * const mfg_fast_parents[] = {
> > > > > > + "mfg_sel",
> > > > > > + "mfgpll_opp"
> > > > > > +};
> > > > > > +
> > > > > > +static const struct mtk_mux top_mtk_muxes[] = {
> > > > > > + /* CLK_CFG_0 */
> > > > > > + MUX_GATE_CLR_SET_UPD_FLAGS(CLK_TOP_AXI_SEL,
> > > > > > "axi_sel",
> > > >
> > > > Please drop the "_sel" suffix from the clock names. It would
> > > > have
> > > > made
> > > > sense if this were purely a mux, and there was another clock
> > > > gate.
> > > > But
> > > > since the driver combines the two components into one
> > >
> > > representation,
> > > > please just drop the suffix that implies just a mux. This goes
> > > > for
> > > > all
> > > > clocks in the series and also the macro bindings.
> >
> >
> >
> > If we move the "_sel" suffix from clock names, it's hard to
> > represent
> > this mux with gate control. Do you think revise it to
> > "XXX_sel_gate" in
> > CCF name but keep the binding name because change the binding name
> > need
> > all CCF consumer changes.
>
> Please elaborate. Does the "type" of the clock matter? All that is
> really needed is that the name is unique, matches the datasheet more
> or
> less, and describes the usage or purpose of the clock.
>
> For example, on Allwinner sunxi platforms, we don't include the type
> of the clock in the clock names. Only the base clock name is used.
> That is because the clocks are modeled as composite-ish clocks, so
> only one clock is needed to describe a full mux+divider+gate.
>
> On other platforms, the clock driver deliberately uses base clock
> types,
> mux, div, and gate, to build up a representation of the full clock
> unit.
> In these cases, we end up with "XXX_mux", "XXX_div", and "XXX_gate".
>
> Since the Mediatek clock driver is more like the first case, I would
> prefer to see clock names with just the base name, and none of the
> typing.
>
> And regarding binding names, please change them as well. Right now
> the
> only place that needs to be changed are the header files. This is the
> time to get them right.
>

Ok, I will remove suffix "_SEL" in binding name and change
clock name from "xxx_sel" to "top_xxx".
Thanks for your comment.

> > > > > > + axi_parents, 0x020, 0x024, 0x028, 0, 3, 7,
> > > > > > 0x04,
> > > >
> > > > 0,
> > > > > > CLK_IS_CRITICAL),
> > > > > > + MUX_GATE_CLR_SET_UPD_FLAGS(CLK_TOP_SPM_SEL,
> > > > > > "spm_sel",
> > > > > > + spm_parents, 0x020, 0x024, 0x028, 8, 2, 15,
> > > >
> > > > 0x04,
> > > > > > 1, CLK_IS_CRITICAL),
> > > >
> > > > Where is the SCP clock?
> >
> >
> >
> > Because SCP is always on and no other clock gates need to reference
> > it,
> > so move it.
>
> Please add a comment as a placeholder then. The comment could simply
> state "clock is always on and should not be handled by Linux".
>
> [...]
>

Ok, I will leave some comment to describe why skip or why make is
critical in next version.

> > > > > > + /* CLK_CFG_11 */
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_USB_SEL, "usb_sel",
> > > >
> > > > The datasheet lists these as "usb_top" and "usb_top_Xp". Please
> > > > keep
> > > > the name
> > > > the same as the datasheet so it is easy to search for. Also
> > > > note the
> > > > discrepency
> > > > between the macro name and the clock name. Same goes for the
> > > > three
> > > > other USB
> > > > clocks.
> >
> >
> >
> > Do you think revise the name the same as datasheet in CCF name but
> > keep
> > binding name?
>
> Please have them match each other. The whole point of keeping names
> consistent is to be able to search for them easily.
>

Ok, I will revise the clock name which can match in datasheet.

> > > >
> > >
> > >
> > > > > > + usb_parents, 0x0A4, 0x0A8, 0x0AC, 0, 2, 7,
> > > > > > 0x08,
> > > > > > 12),
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_SSUSB_XHCI_SEL,
> > > > > > "ssusb_xhci_sel",
> > > > > > + ssusb_xhci_parents, 0x0A4, 0x0A8, 0x0AC, 8,
> > > > > > 2,
> > > >
> > > > 15,
> > > > > > 0x08, 13),
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_USB_1P_SEL,
> > > > > > "usb_1p_sel",
> > > > > > + usb_1p_parents, 0x0A4, 0x0A8, 0x0AC, 16, 2,
> > > > > > 23,
> > > > > > 0x08, 14),
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_SSUSB_XHCI_1P_SEL,
> > > > > > "ssusb_xhci_1p_sel",
> > > > > > + ssusb_xhci_1p_parents, 0x0A4, 0x0A8, 0x0AC,
> > > > > > 24,
> > > >
> > > > 2,
> > > > > > 31, 0x08, 15),
> > > > > > + /* CLK_CFG_12 */
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_USB_2P_SEL,
> > > > > > "usb_2p_sel",
> > > > > > + usb_2p_parents, 0x0B0, 0x0B4, 0x0B8, 0, 2,
> > > > > > 7,
> > > >
> > > > 0x08,
> > > > > > 16),
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_SSUSB_XHCI_2P_SEL,
> > > > > > "ssusb_xhci_2p_sel",
> > > > > > + ssusb_xhci_2p_parents, 0x0B0, 0x0B4, 0x0B8,
> > > > > > 8,
> > > >
> > > > 2,
> > > > > > 15, 0x08, 17),
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_USB_3P_SEL,
> > > > > > "usb_3p_sel",
> > > > > > + usb_3p_parents, 0x0B0, 0x0B4, 0x0B8, 16, 2,
> > > > > > 23,
> > > > > > 0x08, 18),
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_SSUSB_XHCI_3P_SEL,
> > > > > > "ssusb_xhci_3p_sel",
> > > > > > + ssusb_xhci_3p_parents, 0x0B0, 0x0B4, 0x0B8,
> > > > > > 24,
> > > >
> > > > 2,
> > > > > > 31, 0x08, 19),
> > > > > > + /* CLK_CFG_13 */
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_I2C_SEL, "i2c_sel",
> > > > > > + i2c_parents, 0x0BC, 0x0C0, 0x0C4, 0, 2, 7,
> > > > > > 0x08,
> > > > > > 20),
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_SENINF_SEL,
> > > > > > "seninf_sel",
> > > > > > + seninf_parents, 0x0BC, 0x0C0, 0x0C4, 8, 3,
> > > > > > 15,
> > > > > > 0x08, 21),
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_SENINF1_SEL,
> > > >
> > > > "seninf1_sel",
> > > > > > + seninf1_parents, 0x0BC, 0x0C0, 0x0C4, 16,
> > > > > > 3, 23,
> > > > > > 0x08, 22),
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_SENINF2_SEL,
> > > >
> > > > "seninf2_sel",
> > > > > > + seninf2_parents, 0x0BC, 0x0C0, 0x0C4, 24,
> > > > > > 3, 31,
> > > > > > 0x08, 23),
> > > > > > + /* CLK_CFG_14 */
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_SENINF3_SEL,
> > > >
> > > > "seninf3_sel",
> > > > > > + seninf3_parents, 0x0C8, 0x0CC, 0x0D0, 0, 3,
> > > > > > 7,
> > > > > > 0x08, 24),
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_GCPU_SEL, "gcpu_sel",
> > > > > > + gcpu_parents, 0x0C8, 0x0CC, 0x0D0, 8, 3,
> > > > > > 15,
> > > >
> > > > 0x08,
> > > > > > 25),
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_DXCC_SEL, "dxcc_sel",
> > > > > > + dxcc_parents, 0x0C8, 0x0CC, 0x0D0, 16, 2,
> > > > > > 23,
> > > >
> > > > 0x08,
> > > > > > 26),
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_DPMAIF_SEL,
> > > > > > "dpmaif_sel",
> > > > > > + dpmaif_parents, 0x0C8, 0x0CC, 0x0D0, 24, 3,
> > > > > > 31,
> > > > > > 0x08, 27),
> > > > > > + /* CLK_CFG_15 */
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_AES_UFSFDE_SEL,
> > > > > > "aes_ufsfde_sel",
> > > > > > + aes_ufsfde_parents, 0x0D4, 0x0D8, 0x0DC, 0,
> > > > > > 3,
> > > >
> > > > 7,
> > > > > > 0x08, 28),
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_UFS_SEL, "ufs_sel",
> > > > > > + ufs_parents, 0x0D4, 0x0D8, 0x0DC, 8, 3, 15,
> > > >
> > > > 0x08,
> > > > > > 29),
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_UFS_TICK1US_SEL,
> > > > > > "ufs_tick1us_sel",
> > > > > > + ufs_tick1us_parents, 0x0D4, 0x0D8, 0x0DC,
> > > > > > 16, 1,
> > > > > > 23, 0x08, 30),
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_UFS_MP_SAP_SEL,
> > > > > > "ufs_mp_sap_sel",
> > > > > > + ufs_mp_sap_parents, 0x0D4, 0x0D8, 0x0DC,
> > > > > > 24, 1,
> > > >
> > > > 31,
> > > > > > 0x08, 31),
> > > > > > + /* CLK_CFG_16 */
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_VENC_SEL, "venc_sel",
> > > > > > + venc_parents, 0x0E0, 0x0E4, 0x0E8, 0, 4, 7,
> > > >
> > > > 0x0C,
> > > > > > 0),
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_VDEC_SEL, "vdec_sel",
> > > > > > + vdec_parents, 0x0E0, 0x0E4, 0x0E8, 8, 4,
> > > > > > 15,
> > > >
> > > > 0x0C,
> > > > > > 1),
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_PWM_SEL, "pwm_sel",
> > > > > > + pwm_parents, 0x0E0, 0x0E4, 0x0E8, 16, 1,
> > > > > > 23,
> > > >
> > > > 0x0C,
> > > > > > 2),
> > > >
> > > > MCU clock? Not sure what it's supposed to be called since the
> > > > naming
> > > > has a
> > > > slightly different format.
> > > >
> > > > If you are skipping clocks, please leave a comment in the list
> > > > explaining
> > > > why.
> > > >
> > >
> > > "mcupm" is another micro-processor and is always on, and no
> > > others
> > > clock gates need to reference it, so remove it.
>
> Please add a comment, just like in the SCP clock case.
>
> > > > > > + /* CLK_CFG_17 */
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_SPMI_P_MST_SEL,
> > > > > > "spmi_p_mst_sel",
> > > > > > + spmi_p_mst_parents, 0x0EC, 0x0F0, 0x0F4, 0,
> > > > > > 4,
> > > >
> > > > 7,
> > > > > > 0x0C, 4),
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_SPMI_M_MST_SEL,
> > > > > > "spmi_m_mst_sel",
> > > > > > + spmi_m_mst_parents, 0x0EC, 0x0F0, 0x0F4, 8,
> > > > > > 4,
> > > >
> > > > 15,
> > > > > > 0x0C, 5),
> > > >
> > > > DVFSRC clock?
> > > >
> > >
> > > "DVFSRC" IP block is always on and no others clock gates need to
> > > reference it, so remove it.
>
> This one as well.
>
> [...]
>
> > > > > > + /* CLK_CFG_24 */
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_APLL5_SEL,
> > > > > > "apll5_sel",
> > > > > > + apll5_parents, 0x0140, 0x0144, 0x0148, 0,
> > > > > > 1, 7,
> > > > > > 0x010, 0),
> > > >
> > > > For the APLLs, you will need to differentiate them from the
> > > > actual
> > > > PLLs in
> > > > the APMIXEDSYS block.
> > > >
> > >
> > > APLLX providers more precise clock so it has more configuration
> > > register, but it still has same control flow like other PLLs in
> > > APMIXEDSYS.
>
> I think what I meant was, because I asked to remove the "_sel"
> suffix,
> the global clock names here now collide with the ones in APMIXEDSYS.
> So what I was asking was the names here need to be changed, maybe to
> something like "top_apllX".
>
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_I2SO1_M_SEL,
> > > >
> > > > "i2so1_m_sel",
> > > > > > + i2so1_m_parents, 0x0140, 0x0144, 0x0148, 8,
> > > > > > 3,
> > > >
> > > > 15,
> > > > > > 0x010, 1),
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_I2SO2_M_SEL,
> > > >
> > > > "i2so2_m_sel",
> > > > > > + i2so2_m_parents, 0x0140, 0x0144, 0x0148,
> > > > > > 16, 3,
> > > >
> > > > 23,
> > > > > > 0x010, 2),
> > > >
> > > > I2SO4_M?
> > > >
> > >
> > >
> > > > > > + /* CLK_CFG_25 */
> > > >
> > > > I2SO5_M?
> > > >
> > >
> > >
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_I2SI1_M_SEL,
> > > >
> > > > "i2si1_m_sel",
> > > > > > + i2si1_m_parents, 0x014C, 0x0150, 0x0154, 8,
> > > > > > 3,
> > > >
> > > > 15,
> > > > > > 0x010, 5),
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_I2SI2_M_SEL,
> > > >
> > > > "i2si2_m_sel",
> > > > > > + i2si2_m_parents, 0x014C, 0x0150, 0x0154,
> > > > > > 16, 3,
> > > >
> > > > 23,
> > > > > > 0x010, 6),
> > > >
> > > > I2SI4_M?
> > > >
> > >
> > >
> > > > > > + /* CLK_CFG_26 */
> > > >
> > > > I2SI5_M?
> > > >
> > >
> > > I2SO4/I2SO5/I2SI4_M/I2SI5_M is not used in MT8195, so remove it
> > > here.
>
> Please add comments as placeholders for them. The comment could state
> that the clock is unused in the hardware design, so it was skipped.
>
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_DPTX_M_SEL,
> > > > > > "dptx_m_sel",
> > > > > > + dptx_m_parents, 0x0158, 0x015C, 0x0160, 8,
> > > > > > 3,
> > > >
> > > > 15,
> > > > > > 0x010, 9),
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_AUD_IEC_SEL,
> > > >
> > > > "aud_iec_sel",
> > > > > > + aud_iec_parents, 0x0158, 0x015C, 0x0160,
> > > > > > 16, 3,
> > > >
> > > > 23,
> > > > > > 0x010, 10),
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_A1SYS_HP_SEL,
> > > >
> > > > "a1sys_hp_sel",
> > > > > > + a1sys_hp_parents, 0x0158, 0x015C, 0x0160,
> > > > > > 24, 1,
> > > > > > 31, 0x010, 11),
> > > > > > + /* CLK_CFG_27 */
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_A2SYS_SEL,
> > > > > > "a2sys_sel",
> > > > > > + a2sys_parents, 0x0164, 0x0168, 0x016C, 0,
> > > > > > 1, 7,
> > > > > > 0x010, 12),
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_A3SYS_SEL,
> > > > > > "a3sys_sel",
> > > > > > + a3sys_parents, 0x0164, 0x0168, 0x016C, 8,
> > > > > > 3, 15,
> > > > > > 0x010, 13),
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_A4SYS_SEL,
> > > > > > "a4sys_sel",
> > > > > > + a4sys_parents, 0x0164, 0x0168, 0x016C, 16,
> > > > > > 3,
> > > >
> > > > 23,
> > > > > > 0x010, 14),
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_SPINFI_B_SEL,
> > > >
> > > > "spinfi_b_sel",
> > > > > > + spinfi_b_parents, 0x0164, 0x0168, 0x016C,
> > > > > > 24, 3,
> > > > > > 31, 0x010, 15),
> > > > > > + /* CLK_CFG_28 */
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_NFI1X_SEL,
> > > > > > "nfi1x_sel",
> > > > > > + nfi1x_parents, 0x0170, 0x0174, 0x0178, 0,
> > > > > > 3, 7,
> > > > > > 0x010, 16),
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_ECC_SEL, "ecc_sel",
> > > > > > + ecc_parents, 0x0170, 0x0174, 0x0178, 8, 3,
> > > > > > 15,
> > > > > > 0x010, 17),
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_AUDIO_LOCAL_BUS_SEL,
> > > > > > "audio_local_bus_sel",
> > > > > > + audio_local_bus_parents, 0x0170, 0x0174,
> > > > > > 0x0178,
> > > > > > 16, 4, 23, 0x010, 18),
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_SPINOR_SEL,
> > > > > > "spinor_sel",
> > > > > > + spinor_parents, 0x0170, 0x0174, 0x0178, 24,
> > > > > > 2,
> > > >
> > > > 31,
> > > > > > 0x010, 19),
> > > > > > + /* CLK_CFG_29 */
> > > > > > + MUX_GATE_CLR_SET_UPD(CLK_TOP_DVIO_DGI_REF_SEL,
> > > > > > "dvio_dgi_ref_sel",
> > > > > > + dvio_dgi_ref_parents, 0x017C, 0x0180,
> > > > > > 0x0184, 0,
> > > >
> > > > 3,
> > > > > > 7, 0x010, 20),
> > > >
> > > > ULPOSC and ULPOSC_CORE?
> > > >
> >
> >
> >
> > ULPOSC and ULPOSC_CORE is always on and no other clock gate needs
> > to
> > reference it, so just remove it.
>
> Please add placeholder comments describing them, specifically why
> they
> are missing from the driver. Are the clocks used at all in the
> hardware
> design? If so then it might be better to add them to the clock
> driver.
>
> Also, even if they, including SCP and MCU above, are always on, it
> might
> still be nice to have driver support for them, just to be able to
> read
> their state from Linux. We could have CLK_IS_CRITICAL set so they
> don't
> get disabled, and CLK_GET_RATE_NOCACHE if the clocks are expected to
> be
> changed by firmware running alongside of Linux.
>
> > > > > > + MUX_GATE_CLR_SET_UPD_FLAGS(CLK_TOP_SRCK_SEL,
> > > >
> > > > "srck_sel",
> > > > > > + srck_parents, 0x017C, 0x0180, 0x0184, 24,
> > > > > > 1, 31,
> > > > > > 0x010, 23, CLK_IS_CRITICAL),
> > > >
> > > > What happened to CLK_CFG_30~36?
> > > >
> >
> > The muxes in CLK_CFG_30 ~ 36 are not used, so just remove it from
> > CCF.
>
> Please add placeholder comments about them.
>
> > > > > > + /* CLK_CFG_37 */
> > > > > > + MUX_GATE_CLR_SET_UPD_FLAGS(CLK_TOP_RSVD1_SEL,
> > > >
> > > > "rsvd1_sel",
> > > > > > + rsvd1_parents, 0x01DC, 0x01E0, 0x01E4, 0,
> > > > > > 3, 7,
> > > > > > 0x014, 20, CLK_IS_CRITICAL),
> > > >
> > > > What about the other three?
> > > >
> >
> >
> > "rsvd2" and "rsvd3" is not used, so remove it.
>
> Same here.
>
> To be honest, a "rsvd", which I interpret as "reserved", clock being
> used seems kind of contradicting. Do we know what hardware is using
> rsvd1?
>
> > > > > > +};
> > > > > > +
> > > > > > +static struct mtk_composite top_muxes[] = {
> > > > > > + /* CLK_MISC_CFG_3 */
> > > > > > + MUX(CLK_TOP_MFG_FAST_SEL, "mfg_fast_sel",
> > > >
> > > > mfg_fast_parents,
> > > > > > 0x0250, 8, 1),
> > > > > > +};
> > > > > > +
> > > > > > +static const struct mtk_composite top_adj_divs[] = {
> > > > > > + DIV_GATE(CLK_TOP_APLL12_DIV0, "apll12_div0",
> > > >
> > > > "i2si1_m_sel",
> > > > > > 0x0320, 0, 0x0328, 8, 0),
> > > > > > + DIV_GATE(CLK_TOP_APLL12_DIV1, "apll12_div1",
> > > >
> > > > "i2si2_m_sel",
> > > > > > 0x0320, 1, 0x0328, 8, 8),
> > > > > > + DIV_GATE(CLK_TOP_APLL12_DIV2, "apll12_div2",
> > > >
> > > > "i2so1_m_sel",
> > > > > > 0x0320, 2, 0x0328, 8, 16),
> > > > > > + DIV_GATE(CLK_TOP_APLL12_DIV3, "apll12_div3",
> > > >
> > > > "i2so2_m_sel",
> > > > > > 0x0320, 3, 0x0328, 8, 24),
> > > > > > + DIV_GATE(CLK_TOP_APLL12_DIV4, "apll12_div4",
> > > >
> > > > "aud_iec_sel",
> > > > > > 0x0320, 4, 0x0334, 8, 0),
> > > >
> > > > What about 5~8?
> > > >
> > >
> > > div5 ~ 8 are not used in MT8195, so remove it.
>
> Placeholder comments please.
>
> [...]
>
> > > > > > +static const struct mtk_gate_regs top0_cg_regs = {
> > > > > > + .set_ofs = 0x238,
> > > > > > + .clr_ofs = 0x238,
> > > > > > + .sta_ofs = 0x238,
> > > > > > +};
> > > > > > +
> > > > > > +static const struct mtk_gate_regs top1_cg_regs = {
> > > > > > + .set_ofs = 0x250,
> > > > > > + .clr_ofs = 0x250,
> > > > > > + .sta_ofs = 0x250,
> > > > > > +};
> > > > > > +
> > > > > > +#define GATE_TOP0_FLAGS(_id, _name, _parent, _shift,
> > > > > > _flag) \
> > > > > > + GATE_MTK_FLAGS(_id, _name, _parent, &top0_cg_regs,
> > > > > > _shift, \
> > > > > > + &mtk_clk_gate_ops_no_setclr_inv, _flag)
> > > > > > +
> > > > > > +#define GATE_TOP0(_id, _name, _parent,
> > > >
> > > > _shift) \
> > > > > > + GATE_TOP0_FLAGS(_id, _name, _parent, _shift, 0)
> > > > > > +
> > > > > > +#define GATE_TOP1(_id, _name, _parent,
> > > >
> > > > _shift) \
> > > > > > + GATE_MTK(_id, _name, _parent, &top1_cg_regs,
> > > > > > _shift,
> > > > > > &mtk_clk_gate_ops_no_setclr_inv)
> > > > > > +
> > > > > > +static const struct mtk_gate top_clks[] = {
> > > > > > + /* TOP0 */
> > > > > > + GATE_TOP0(CLK_TOP_CFG_VPP0, "cfg_vpp0", "vpp_sel",
> > > > > > 0),
> > > > > > + GATE_TOP0(CLK_TOP_CFG_VPP1, "cfg_vpp1", "vpp_sel",
> > > > > > 1),
> > > > > > + GATE_TOP0(CLK_TOP_CFG_VDO0, "cfg_vdo0", "vpp_sel",
> > > > > > 2),
> > > > > > + GATE_TOP0(CLK_TOP_CFG_VDO1, "cfg_vdo1", "vpp_sel",
> > > > > > 3),
> > > > > > + GATE_TOP0(CLK_TOP_CFG_UNIPLL_SES, "cfg_unipll_ses",
> > > > > > "univpll_d2", 4),
> > > > > > + GATE_TOP0(CLK_TOP_CFG_26M_VPP0, "cfg_26m_vpp0",
> > > >
> > > > "clk26m",
> > > > > > 5),
> > > > > > + GATE_TOP0(CLK_TOP_CFG_26M_VPP1, "cfg_26m_vpp1",
> > > >
> > > > "clk26m",
> > > > > > 6),
> > > > > > + GATE_TOP0(CLK_TOP_CFG_26M_AUD, "cfg_26m_aud",
> > > > > > "clk26m",
> > > >
> > > > 9),
> > > > > > + GATE_TOP0_FLAGS(CLK_TOP_CFG_AXI_EAST,
> > > > > > "cfg_axi_east",
> > > > > > "axi_sel", 10, CLK_IS_CRITICAL),
> > > > > > + GATE_TOP0_FLAGS(CLK_TOP_CFG_AXI_EAST_NORTH,
> > > > > > "cfg_axi_east_north", "axi_sel", 11,
> > > > > > + CLK_IS_CRITICAL),
> > > > > > + GATE_TOP0_FLAGS(CLK_TOP_CFG_AXI_NORTH,
> > > > > > "cfg_axi_north",
> > > > > > "axi_sel", 12, CLK_IS_CRITICAL),
> > > > > > + GATE_TOP0_FLAGS(CLK_TOP_CFG_AXI_SOUTH,
> > > > > > "cfg_axi_south",
> > > > > > "axi_sel", 13, CLK_IS_CRITICAL),
> > > > > > + GATE_TOP0(CLK_TOP_CFG_EXT_TEST, "cfg_ext_test",
> > > > > > "msdcpll_d2", 15),
> > > > > > + /* TOP1 */
> > > > > > + GATE_TOP1(CLK_TOP_SSUSB_REF, "ssusb_ref", "clk26m",
> > > > > > 0),
> > > > > > + GATE_TOP1(CLK_TOP_SSUSB_PHY_REF, "ssusb_phy_ref",
> > > >
> > > > "clk26m",
> > > > > > 1),
> > > > > > + GATE_TOP1(CLK_TOP_SSUSB_P1_REF, "ssusb_p1_ref",
> > > >
> > > > "clk26m",
> > > > > > 2),
> > > > > > + GATE_TOP1(CLK_TOP_SSUSB_PHY_P1_REF,
> > > > > > "ssusb_phy_p1_ref",
> > > > > > "clk26m", 3),
> > > > > > + GATE_TOP1(CLK_TOP_SSUSB_P2_REF, "ssusb_p2_ref",
> > > >
> > > > "clk26m",
> > > > > > 4),
> > > > > > + GATE_TOP1(CLK_TOP_SSUSB_PHY_P2_REF,
> > > > > > "ssusb_phy_p2_ref",
> > > > > > "clk26m", 5),
> > > > > > + GATE_TOP1(CLK_TOP_SSUSB_P3_REF, "ssusb_p3_ref",
> > > >
> > > > "clk26m",
> > > > > > 6),
> > > > > > + GATE_TOP1(CLK_TOP_SSUSB_PHY_P3_REF,
> > > > > > "ssusb_phy_p3_ref",
> > > > > > "clk26m", 7),
> > > > > > +};
> > > >
> > > > These should be grouped with the other TOPCKGEN clocks. Another
> > > > reason to
> > > > split this driver into multiple ones.
> > > >
> >
> >
> >
> > These clocks are "clock gate" in TOPCKGEN, so we separate the data
> > of
> > "clock gate" from "clock mux".
>
> Right, but it gets really confusing when the driver is mixing clocks
> from different clock controllers. Code that gets used together should
> be grouped together. In this case, code for the same hardware block
> should be grouped together. So please split the drivers up if they
> end
> up being really big, and then group the remaining ones by hardware
> block first, then type second.
>

I will separate the clocks here to different clock driver, each driver
only keep the clocks that provided by same IP block.

> > > > > > +
> > > > > > +static const struct mtk_gate_regs apmixed_cg_regs = {
> > > > > > + .set_ofs = 0x8,
> > > > > > + .clr_ofs = 0x8,
> > > > > > + .sta_ofs = 0x8,
> > > > > > +};
> > > > > > +
> > > > > > +#define GATE_APMIXED(_id, _name, _parent,
> > > > > > _shift) \
> > > > > > + GATE_MTK(_id, _name, _parent, &apmixed_cg_regs,
> > > > > > _shift,
> > > > > > &mtk_clk_gate_ops_no_setclr_inv)
> > > > > > +
> > > > > > +static const struct mtk_gate apmixed_clks[] = {
> > > > > > + GATE_APMIXED(CLK_APMIXED_PLL_SSUSB26M,
> > > > > > "pll_ssusb26m",
> > > > > > "clk26m", 1),
> > > > > > +};
> > > > > > +
> > > > > > +#define MT8195_PLL_FMAX (3800UL * MHZ)
> > > > > > +#define MT8195_PLL_FMIN (1500UL * MHZ)
> > > > > > +#define MT8195_INTEGER_BITS 8
> > > > > > +
> > > > > > +#define PLL(_id, _name, _reg, _pwr_reg, _en_mask,
> > > >
> > > > _flags, \
> > > > > > + _rst_bar_mask, _pcwbits, _pd_reg,
> > > > > > _pd_shift, \
> > > > > > + _tuner_reg, _tuner_en_reg,
> > > > > > _tuner_en_bit, \
> > > > > > + _pcw_reg, _pcw_shift,
> > > > > > _pcw_chg_reg, \
> > > > > > + _en_reg, _pll_en_bit)
> > > > > > { \
> > > > > > + .id =
> > > > > > _id, \
> > > > > > + .name =
> > > > > > _name, \
> > > > > > + .reg =
> > > > > > _reg, \
> > > > > > + .pwr_reg =
> > > > > > _pwr_reg, \
> > > > > > + .en_mask =
> > > > > > _en_mask, \
> > > > > > + .flags =
> > > > > > _flags, \
> > > > > > + .rst_bar_mask =
> > > > > > _rst_bar_mask, \
> > > > > > + .fmax =
> > > > > > MT8195_PLL_FMAX, \
> > > > > > + .fmin =
> > > > > > MT8195_PLL_FMIN, \
> > > > > > + .pcwbits =
> > > > > > _pcwbits, \
> > > > > > + .pcwibits =
> > > > > > MT8195_INTEGER_BITS, \
> > > > > > + .pd_reg =
> > > > > > _pd_reg, \
> > > > > > + .pd_shift =
> > > > > > _pd_shift, \
> > > > > > + .tuner_reg =
> > > > > > _tuner_reg, \
> > > > > > + .tuner_en_reg =
> > > > > > _tuner_en_reg, \
> > > > > > + .tuner_en_bit =
> > > > > > _tuner_en_bit, \
> > > > > > + .pcw_reg =
> > > > > > _pcw_reg, \
> > > > > > + .pcw_shift =
> > > > > > _pcw_shift, \
> > > > > > + .pcw_chg_reg =
> > > > > > _pcw_chg_reg, \
> > > > > > + .en_reg =
> > > > > > _en_reg, \
> > > > > > + .pll_en_bit =
> > > > > > _pll_en_bit, \
> > > > > > + }
> > > > > > +
> > > > > > +static const struct mtk_pll_data plls[] = {
> > > > > > + PLL(CLK_APMIXED_NNAPLL, "nnapll", 0x0390, 0x03a0,
> > > > > > 0,
> > > > > > + 0, 0, 22, 0x0398, 24, 0, 0, 0, 0x0398, 0,
> > > >
> > > > 0x0398,
> > > > > > 0, 9),
> > > > > > + PLL(CLK_APMIXED_RESPLL, "respll", 0x0190, 0x0320,
> > > > > > 0,
> > > > > > + 0, 0, 22, 0x0198, 24, 0, 0, 0, 0x0198, 0,
> > > >
> > > > 0x0198,
> > > > > > 0, 9),
> > > > > > + PLL(CLK_APMIXED_ETHPLL, "ethpll", 0x0360, 0x0370,
> > > > > > 0,
> > > > > > + 0, 0, 22, 0x0368, 24, 0, 0, 0, 0x0368, 0,
> > > >
> > > > 0x0368,
> > > > > > 0, 9),
> > > > > > + PLL(CLK_APMIXED_MSDCPLL, "msdcpll", 0x0710, 0x0720,
> > > > > > 0,
> > > > > > + 0, 0, 22, 0x0718, 24, 0, 0, 0, 0x0718, 0,
> > > >
> > > > 0x0718,
> > > > > > 0, 9),
> > > > > > + PLL(CLK_APMIXED_TVDPLL1, "tvdpll1", 0x00a0, 0x00b0,
> > > > > > 0,
> > > > > > + 0, 0, 22, 0x00a8, 24, 0, 0, 0, 0x00a8, 0,
> > > >
> > > > 0x00a8,
> > > > > > 0, 9),
> > > > > > + PLL(CLK_APMIXED_TVDPLL2, "tvdpll2", 0x00c0, 0x00d0,
> > > > > > 0,
> > > > > > + 0, 0, 22, 0x00c8, 24, 0, 0, 0, 0x00c8, 0,
> > > >
> > > > 0x00c8,
> > > > > > 0, 9),
> > > > > > + PLL(CLK_APMIXED_MMPLL, "mmpll", 0x00e0, 0x00f0,
> > > >
> > > > 0xff000000,
> > > > > > + HAVE_RST_BAR, BIT(23), 22, 0x00e8, 24, 0,
> > > > > > 0, 0,
> > > > > > 0x00e8, 0, 0x00e8, 0, 9),
> > > > > > + PLL(CLK_APMIXED_MAINPLL, "mainpll", 0x01d0, 0x01e0,
> > > > > > 0xff000000,
> > > > > > + HAVE_RST_BAR, BIT(23), 22, 0x01d8, 24, 0,
> > > > > > 0, 0,
> > > > > > 0x01d8, 0, 0x01d8, 0, 9),
> > > > > > + PLL(CLK_APMIXED_VDECPLL, "vdecpll", 0x0890, 0x08a0,
> > > > > > 0,
> > > > > > + 0, 0, 22, 0x0898, 24, 0, 0, 0, 0x0898, 0,
> > > >
> > > > 0x0898,
> > > > > > 0, 9),
> > > > > > + PLL(CLK_APMIXED_IMGPLL, "imgpll", 0x0100, 0x0110,
> > > > > > 0,
> > > > > > + 0, 0, 22, 0x0108, 24, 0, 0, 0, 0x0108, 0,
> > > >
> > > > 0x0108,
> > > > > > 0, 9),
> > > > > > + PLL(CLK_APMIXED_UNIVPLL, "univpll", 0x01f0, 0x0700,
> > > > > > 0xff000000,
> > > > > > + HAVE_RST_BAR, BIT(23), 22, 0x01f8, 24, 0,
> > > > > > 0, 0,
> > > > > > 0x01f8, 0, 0x01f8, 0, 9),
> > > > > > + PLL(CLK_APMIXED_HDMIPLL1, "hdmipll1", 0x08c0,
> > > > > > 0x08d0,
> > > >
> > > > 0,
> > > > > > + 0, 0, 22, 0x08c8, 24, 0, 0, 0, 0x08c8, 0,
> > > >
> > > > 0x08c8,
> > > > > > 0, 9),
> > > > > > + PLL(CLK_APMIXED_HDMIPLL2, "hdmipll2", 0x0870,
> > > > > > 0x0880,
> > > >
> > > > 0,
> > > > > > + 0, 0, 22, 0x0878, 24, 0, 0, 0, 0x0878, 0,
> > > >
> > > > 0x0878,
> > > > > > 0, 9),
> > > > > > + PLL(CLK_APMIXED_HDMIRX_APLL, "hdmirx_apll", 0x08e0,
> > > >
> > > > 0x0dd4,
> > > > > > 0,
> > > > > > + 0, 0, 32, 0x08e8, 24, 0, 0, 0, 0x08ec, 0,
> > > >
> > > > 0x08e8,
> > > > > > 0, 9),
> > > > > > + PLL(CLK_APMIXED_USB1PLL, "usb1pll", 0x01a0, 0x01b0,
> > > > > > 0,
> > > > > > + 0, 0, 22, 0x01a8, 24, 0, 0, 0, 0x01a8, 0,
> > > >
> > > > 0x01a8,
> > > > > > 0, 9),
> > > > > > + PLL(CLK_APMIXED_ADSPPLL, "adsppll", 0x07e0, 0x07f0,
> > > > > > 0,
> > > > > > + 0, 0, 22, 0x07e8, 24, 0, 0, 0, 0x07e8, 0,
> > > >
> > > > 0x07e8,
> > > > > > 0, 9),
> > > > > > + PLL(CLK_APMIXED_APLL1, "apll1", 0x07c0, 0x0dc0, 0,
> > > > > > + 0, 0, 32, 0x07c8, 24, 0x0470, 0x0000, 12,
> > > >
> > > > 0x07cc,
> > > > > > 0, 0x07c8, 0, 9),
> > > > > > + PLL(CLK_APMIXED_APLL2, "apll2", 0x0780, 0x0dc4, 0,
> > > > > > + 0, 0, 32, 0x0788, 24, 0x0474, 0x0000, 13,
> > > >
> > > > 0x078c,
> > > > > > 0, 0x0788, 0, 9),
> > > > > > + PLL(CLK_APMIXED_APLL3, "apll3", 0x0760, 0x0dc8, 0,
> > > > > > + 0, 0, 32, 0x0768, 24, 0x0478, 0x0000, 14,
> > > >
> > > > 0x076c,
> > > > > > 0, 0x0768, 0, 9),
> > > > > > + PLL(CLK_APMIXED_APLL4, "apll4", 0x0740, 0x0dcc, 0,
> > > > > > + 0, 0, 32, 0x0748, 24, 0x047C, 0x0000, 15,
> > > >
> > > > 0x074c,
> > > > > > 0, 0x0748, 0, 9),
> > > > > > + PLL(CLK_APMIXED_APLL5, "apll5", 0x07a0, 0x0dd0,
> > > >
> > > > 0x100000,
> > > > > > + 0, 0, 32, 0x07a8, 24, 0x0480, 0x0000, 16,
> > > >
> > > > 0x07ac,
> > > > > > 0, 0x07a8, 0, 9),
> > > > > > + PLL(CLK_APMIXED_MFGPLL, "mfgpll", 0x0340, 0x0350,
> > > > > > 0,
> > > > > > + 0, 0, 22, 0x0348, 24, 0, 0, 0, 0x0348, 0,
> > > >
> > > > 0x0348,
> > > > > > 0, 9),
> > > > > > + PLL(CLK_APMIXED_DGIPLL, "dgipll", 0x0150, 0x0160,
> > > > > > 0,
> > > > > > + 0, 0, 22, 0x0158, 24, 0, 0, 0, 0x0158, 0,
> > > >
> > > > 0x0158,
> > > > > > 0, 9),
> > > > > > +};
> > > > > > +
> > > > > > +static struct clk_onecell_data *top_clk_data;
> > > > > > +
> > > > > > +static void clk_mt8195_top_init_early(struct device_node
> > > >
> > > > *node)
> > > > > > +{
> > > > > > + int i;
> > > > > > +
> > > > > > + top_clk_data = mtk_alloc_clk_data(CLK_TOP_NR_CLK);
> > > > > > + if (!top_clk_data)
> > > > > > + return;
> > > > > > +
> > > > > > + for (i = 0; i < CLK_TOP_NR_CLK; i++)
> > > > > > + top_clk_data->clks[i] = ERR_PTR(-
> > > > > > EPROBE_DEFER);
> > > > > > +
> > > > > > + mtk_clk_register_factors(top_early_divs,
> > > > > > ARRAY_SIZE(top_early_divs), top_clk_data);
> > > > > > +
> > > > > > + of_clk_add_provider(node, of_clk_src_onecell_get,
> > > > > > top_clk_data);
> > > > > > +}
> > > > > > +
> > > > > > +CLK_OF_DECLARE_DRIVER(mt8195_topckgen,
> > > >
> > > > "mediatek,mt8195-topckgen",
> > > > > > + clk_mt8195_top_init_early);
> > > > > > +
> > > > > > +static int clk_mt8195_top_probe(struct platform_device
> > > > > > *pdev)
> > > > > > +{
> > > > > > + struct device_node *node = pdev->dev.of_node;
> > > > > > + int r;
> > > > > > + void __iomem *base;
> > > > > > +
> > > > > > + base = devm_platform_ioremap_resource(pdev, 0);
> > > > > > + if (IS_ERR(base))
> > > > > > + return PTR_ERR(base);
> > > > > > +
> > > > > > + mtk_clk_register_fixed_clks(top_fixed_clks,
> > > > > > ARRAY_SIZE(top_fixed_clks),
> > > > > > + top_clk_data);
> > > > > > + mtk_clk_register_factors(top_early_divs,
> > > > > > ARRAY_SIZE(top_early_divs), top_clk_data);
> > > > > > + mtk_clk_register_factors(top_divs,
> > > > > > ARRAY_SIZE(top_divs),
> > > > > > top_clk_data);
> > > > > > + mtk_clk_register_muxes(top_mtk_muxes,
> > > > > > ARRAY_SIZE(top_mtk_muxes), node,
> > > > > > + &mt8195_clk_lock, top_clk_data);
> > > > > > + mtk_clk_register_composites(top_muxes,
> > > > > > ARRAY_SIZE(top_muxes), base,
> > > > > > + &mt8195_clk_lock, top_clk_data);
> > > > > > + mtk_clk_register_composites(top_adj_divs,
> > > > > > ARRAY_SIZE(top_adj_divs), base,
> > > > > > + &mt8195_clk_lock, top_clk_data);
> > > >
> > > > Future work: these functions probably should be made to return
> > > > errors.
> > > >
> > >
> > >
> > > > > > + r = mtk_clk_register_gates(node, top_clks,
> > > > > > ARRAY_SIZE(top_clks), top_clk_data);
> > > > > > + if (r)
> > > > > > + return r;
> > > > > > +
> > > > > > + return of_clk_add_provider(node,
> > > > > > of_clk_src_onecell_get,
> > > > > > top_clk_data);
> > > > > > +}
> > > > > > +
> > > > > > +static int clk_mt8195_infra_ao_probe(struct
> > > > > > platform_device
> > > >
> > > > *pdev)
> > > > > > +{
> > > > > > + struct clk_onecell_data *clk_data;
> > > > > > + struct device_node *node = pdev->dev.of_node;
> > > > > > + int r;
> > > > > > +
> > > > > > + clk_data = mtk_alloc_clk_data(CLK_INFRA_AO_NR_CLK);
> > > > > > + if (!clk_data)
> > > > > > + return -ENOMEM;
> > > > > > +
> > > > > > + r = mtk_clk_register_gates(node, infra_ao_clks,
> > > > > > ARRAY_SIZE(infra_ao_clks), clk_data);
> > > > > > + if (r)
> > > > > > + return r;
> > > > > > +
> > > > > > + return of_clk_add_provider(node,
> > > > > > of_clk_src_onecell_get,
> > > > > > clk_data);
> > > >
> > > > You are leaking clk_data if mtk_clk_register_gates() or
> > > > of_clk_add_provider()
> > > > fail.
> > > >
> >
> >
> >
> > Ok, I will fix it include you mention below, thanks for you
> > comment.
> >
> >
> > > > > > +}
> > > > > > +
> > > > > > +static int clk_mt8195_apmixed_probe(struct platform_device
> > > >
> > > > *pdev)
> > > > > > +{
> > > > > > + struct clk_onecell_data *clk_data;
> > > > > > + struct device_node *node = pdev->dev.of_node;
> > > > > > + int r;
> > > > > > +
> > > > > > + clk_data = mtk_alloc_clk_data(CLK_APMIXED_NR_CLK);
> > > > > > + if (!clk_data)
> > > > > > + return -ENOMEM;
> > > > > > +
> > > > > > + mtk_clk_register_plls(node, plls, ARRAY_SIZE(plls),
> > > > > > clk_data);
> > > > > > + r = mtk_clk_register_gates(node, apmixed_clks,
> > > > > > ARRAY_SIZE(apmixed_clks), clk_data);
> > > > > > + if (r)
> > > > > > + return r;
> > > > > > +
> > > > > > + return of_clk_add_provider(node,
> > > > > > of_clk_src_onecell_get,
> > > > > > clk_data);
> > > >
> > > > Same here.
> > > >
> > >
> > >
> > > > > > +}
> > > > > > +
> > > > > > +static int clk_mt8195_peri_ao_probe(struct platform_device
> > > >
> > > > *pdev)
> > > > > > +{
> > > > > > + struct clk_onecell_data *clk_data;
> > > > > > + struct device_node *node = pdev->dev.of_node;
> > > > > > + int r;
> > > > > > +
> > > > > > + clk_data = mtk_alloc_clk_data(CLK_PERI_AO_NR_CLK);
> > > > > > + if (!clk_data)
> > > > > > + return -ENOMEM;
> > > > > > +
> > > > > > + r = mtk_clk_register_gates(node, peri_ao_clks,
> > > > > > ARRAY_SIZE(peri_ao_clks), clk_data);
> > > > > > + if (r)
> > > > > > + return r;
> > > > > > +
> > > > > > + return of_clk_add_provider(node,
> > > > > > of_clk_src_onecell_get,
> > > > > > clk_data);
> > > >
> > > > And here.
> > > >
> > >
> > >
> > > > > > +}
> > > > > > +
> > > > > > +static const struct of_device_id of_match_clk_mt8195[] = {
> > > > > > + {
> > > > > > + .compatible = "mediatek,mt8195-apmixedsys",
> > > > > > + .data = clk_mt8195_apmixed_probe,
> > > > > > + }, {
> > > > > > + .compatible = "mediatek,mt8195-topckgen",
> > > > > > + .data = clk_mt8195_top_probe,
> > > > > > + }, {
> > > > > > + .compatible = "mediatek,mt8195-
> > > > > > infracfg_ao",
> > > > > > + .data = clk_mt8195_infra_ao_probe,
> > > > > > + }, {
> > > > > > + .compatible = "mediatek,mt8195-pericfg_ao",
> > > > > > + .data = clk_mt8195_peri_ao_probe,
> > > >
> > > > This file contains four drivers. They do not have depend on
> > > > each
> > > > other,
> > > > and do not need to be in the same file. Please split them into
> > > > different
> > > > files and preferably different patches so people reading them
> > > > don't
> > > > have
> > > > to look through unrelated data. Then you don't need the pointer
> > > > to
> > > > the
> > > > probe function.
> > > >
> >
> >
> >
> > Ok, I will split to different driver.
> >
> >
> > > > You can keep them under the same Kconfig symbol.
> > > >
> > >
> > >
> > > > > > + }, {
> > > > > > + /* sentinel */
> > > > > > + }
> > > > > > +};
> > > > > > +
> > > > > > +static int clk_mt8195_probe(struct platform_device *pdev)
> > > > > > +{
> > > > > > + int (*clk_probe)(struct platform_device *pdev);
> > > > > > + int r;
> > > > > > +
> > > > > > + clk_probe = of_device_get_match_data(&pdev->dev);
> > > > > > + if (!clk_probe)
> > > > > > + return -EINVAL;
> > > > > > +
> > > > > > + r = clk_probe(pdev);
> > > > > > + if (r)
> > > > > > + dev_err(&pdev->dev,
> > > > > > + "could not register clock provider:
> > > > > > %s:
> > > > > > %d\n",
> > > > > > + pdev->name, r);
> > > > > > +
> > > > > > + return r;
> > > > > > +}
> > > > > > +
> > > > > > +static struct platform_driver clk_mt8195_drv = {
> > > > > > + .probe = clk_mt8195_probe,
> > > > > > + .driver = {
> > > > > > + .name = "clk-mt8195",
> > > > > > + .of_match_table = of_match_clk_mt8195,
> > > > > > + },
> > > > > > +};
> > > > > > +
> > > > > > +static int __init clk_mt8195_init(void)
> > > > > > +{
> > > > > > + return platform_driver_register(&clk_mt8195_drv);
> > > > > > +}
> > > > > > +
> > > > > > +arch_initcall(clk_mt8195_init);
> > > >
> > > > Is there any particular reason for arch_initcall?
> > > >
> >
> >
> > APMIXEDSYS/TOPCKGEN are clock source of others IP block and
> > PERICFG/INFRACFG provide peripheral and bus clocks control, so we
> > want
> > to init early.
>
> Sure, but this should really be done through standard dependency
> handling, and not trying to sequence them by hand.
>
> Is there an observable benefit to having arch_initcall() vs the
> standard
> order with builtin_platform_driver()? If so, this should be
> documented
> here as a justifcation for arch_initcall().
>

I will use builtin_platform_driver like other subsys ip block
in next version.

Best Regards,
Chun-Jie

>
> Regards
> ChenYu

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