linux-kernel - Re: [PATCH 2/4] clk: qcom: Add Global Clock controller (GCC) driver for SC8380XP

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Message-ID: <ZVcgoX56q0lYWKyw@hovoldconsulting.com>
Date:   Fri, 17 Nov 2023 09:13:21 +0100
From:   Johan Hovold <johan@...nel.org>
To:     Sibi Sankar <quic_sibis@...cinc.com>
Cc:     Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
        andersson@...nel.org, konrad.dybcio@...aro.org,
        mturquette@...libre.com, sboyd@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, agross@...nel.org,
        conor+dt@...nel.org, quic_tdas@...cinc.com,
        quic_rjendra@...cinc.com, linux-arm-msm@...r.kernel.org,
        linux-clk@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, neil.armstrong@...aro.org,
        abel.vesa@...aro.org, quic_tsoni@...cinc.com
Subject: Re: [PATCH 2/4] clk: qcom: Add Global Clock controller (GCC) driver
 for SC8380XP

On Fri, Nov 17, 2023 at 09:26:18AM +0530, Sibi Sankar wrote:
> On 10/25/23 22:10, Bryan O'Donoghue wrote:
> > On 25/10/2023 14:33, Sibi Sankar wrote:

> >> +static struct clk_rcg2 gcc_sdcc2_apps_clk_src = {
> >> +    .cmd_rcgr = 0x14018,
> >> +    .mnd_width = 8,
> >> +    .hid_width = 5,
> >> +    .parent_map = gcc_parent_map_9,
> >> +    .freq_tbl = ftbl_gcc_sdcc2_apps_clk_src,
> >> +    .clkr.hw.init = &(const struct clk_init_data) {
> >> +        .name = "gcc_sdcc2_apps_clk_src",
> >> +        .parent_data = gcc_parent_data_9,
> >> +        .num_parents = ARRAY_SIZE(gcc_parent_data_9),
> >> +        .flags = CLK_SET_RATE_PARENT,
> >> +        .ops = &clk_rcg2_floor_ops,
> > 
> > diff sc8280xp..sc8380xp
> > 
> > Here you've used floor instead of shared ops, why is that ?
> 
> We seem to use floor ops for sdcc clks on all other QC SoCs and
> sc8280xp seems to be the exception here. So I'll continue to use floor
> ops for sdcc.

> >> +static struct clk_rcg2 gcc_usb30_mp_mock_utmi_clk_src = {
> >> +    .cmd_rcgr = 0x17158,
> >> +    .mnd_width = 0,
> >> +    .hid_width = 5,
> >> +    .parent_map = gcc_parent_map_0,
> >> +    .freq_tbl = ftbl_gcc_pcie_0_aux_clk_src,
> >> +    .clkr.hw.init = &(const struct clk_init_data) {
> >> +        .name = "gcc_usb30_mp_mock_utmi_clk_src",
> >> +        .parent_data = gcc_parent_data_0,
> >> +        .num_parents = ARRAY_SIZE(gcc_parent_data_0),
> >> +        .flags = CLK_SET_RATE_PARENT,
> >> +        .ops = &clk_rcg2_ops,
> > 
> > This is another discontinuinty with sc8280xp.
> > 
> > Could you have a look through the sc8280xp gcc and do an aduit for 
> > clk_rcg2_shared_ops as against sc8380xp ?
> 
> ack, will do a quick audit before the re-spin.

Please trim unnecessary context from your replies. You quoted some 1400
lines of irrelevant clock structs when all you needed was something like
the above.

Not trimming replies makes it a pain to read your mails and to revisit
threads like this one, for example, in the lore web archives.

Johan