linux-kernel - Re: [PATCH v3 3/3] clk: qcom: Add display clock controller driver for SDM845

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Message-ID: <153109408562.143105.15954380130353645468@swboyd.mtv.corp.google.com>
Date:   Sun, 08 Jul 2018 16:54:45 -0700
From:   Stephen Boyd <sboyd@...nel.org>
To:     Michael Turquette <mturquette@...libre.com>,
        Taniya Das <tdas@...eaurora.org>
Cc:     Andy Gross <andy.gross@...aro.org>,
        David Brown <david.brown@...aro.org>,
        Rajendra Nayak <rnayak@...eaurora.org>,
        Amit Nischal <anischal@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, linux-soc@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        Taniya Das <tdas@...eaurora.org>
Subject: Re: [PATCH v3 3/3] clk: qcom: Add display clock controller driver for SDM845

Quoting Taniya Das (2018-06-23 07:19:27)
> diff --git a/drivers/clk/qcom/dispcc-sdm845.c b/drivers/clk/qcom/dispcc-sdm845.c
> new file mode 100644
> index 0000000..af437e0
> --- /dev/null
> +++ b/drivers/clk/qcom/dispcc-sdm845.c
> @@ -0,0 +1,674 @@
> +// SPDX-License-Identifier: GPL-2.0
[...]
> +static struct clk_alpha_pll disp_cc_pll0 = {
> +       .offset = 0x0,
> +       .regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_FABIA],
> +       .clkr = {
> +               .hw.init = &(struct clk_init_data){
> +                       .name = "disp_cc_pll0",
> +                       .parent_names = (const char *[]){ "bi_tcxo" },
> +                       .num_parents = 1,
> +                       .ops = &clk_alpha_pll_fabia_ops,
> +               },
> +       },
> +};
> +
> +static struct clk_rcg2 disp_cc_mdss_byte0_clk_src = {
> +       .cmd_rcgr = 0x20d0,
> +       .mnd_width = 0,
> +       .hid_width = 5,
> +       .parent_map = disp_cc_parent_map_0,
> +       .clkr.hw.init = &(struct clk_init_data){
> +               .name = "disp_cc_mdss_byte0_clk_src",
> +               .parent_names = disp_cc_parent_names_0,
> +               .num_parents = 4,
> +               .flags = CLK_SET_RATE_PARENT | CLK_GET_RATE_NOCACHE,

Why is there the no cache flag? Last time I asked I don't think I got
any answer, and there isn't a comment here so please at least add a
comment to the code so we don't forget.

> +               .ops = &clk_byte2_ops,
> +       },
> +};
> +
> +static struct clk_rcg2 disp_cc_mdss_byte1_clk_src = {
> +       .cmd_rcgr = 0x20ec,
> +       .mnd_width = 0,
> +       .hid_width = 5,
> +       .parent_map = disp_cc_parent_map_0,
> +       .clkr.hw.init = &(struct clk_init_data){
> +               .name = "disp_cc_mdss_byte1_clk_src",
> +               .parent_names = disp_cc_parent_names_0,
> +               .num_parents = 4,
> +               .flags = CLK_SET_RATE_PARENT | CLK_GET_RATE_NOCACHE,
> +               .ops = &clk_byte2_ops,
> +       },
> +};
> +
> +static const struct freq_tbl ftbl_disp_cc_mdss_esc0_clk_src[] = {
> +       F(19200000, P_BI_TCXO, 1, 0, 0),
> +       { }
> +};
> +
> +static struct clk_rcg2 disp_cc_mdss_esc0_clk_src = {
> +       .cmd_rcgr = 0x2108,
> +       .mnd_width = 0,
> +       .hid_width = 5,
> +       .parent_map = disp_cc_parent_map_0,
> +       .freq_tbl = ftbl_disp_cc_mdss_esc0_clk_src,
> +       .clkr.hw.init = &(struct clk_init_data){
> +               .name = "disp_cc_mdss_esc0_clk_src",
> +               .parent_names = disp_cc_parent_names_0,
> +               .num_parents = 4,
> +               .ops = &clk_rcg2_ops,
> +       },
> +};
> +
> +static struct clk_rcg2 disp_cc_mdss_esc1_clk_src = {
> +       .cmd_rcgr = 0x2120,
> +       .mnd_width = 0,
> +       .hid_width = 5,
> +       .parent_map = disp_cc_parent_map_0,
> +       .freq_tbl = ftbl_disp_cc_mdss_esc0_clk_src,
> +       .clkr.hw.init = &(struct clk_init_data){
> +               .name = "disp_cc_mdss_esc1_clk_src",
> +               .parent_names = disp_cc_parent_names_0,
> +               .num_parents = 4,
> +               .ops = &clk_rcg2_ops,
> +       },
> +};
> +
[...]
> +
> +MODULE_LICENSE("GPL v2");

MODULE_DESCRIPTION?