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Message-ID: <6c25444a-0a2a-4d33-be7a-1d9846bab14d@linaro.org>
Date: Thu, 31 Aug 2023 11:40:23 +0200
From: Konrad Dybcio <konrad.dybcio@...aro.org>
To: Andy Gross <agross@...nel.org>,
Bjorn Andersson <andersson@...nel.org>,
Michael Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...nel.org>
Cc: Marijn Suijten <marijn.suijten@...ainline.org>,
Stephen Boyd <sboyd@...eaurora.org>,
linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
linux-kernel@...r.kernel.org,
Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Subject: Re: [PATCH] clk: qcom: gcc-msm8996: Remove RPM bus clocks
On 31.08.2023 11:39, Konrad Dybcio wrote:
> The GCC driver contains clocks that are owned (meaning configured and
> scaled) by the RPM core.
>
> Remove them from Linux to stop interjecting the RPM's logic.
>
> Fixes: b1e010c0730a ("clk: qcom: Add MSM8996 Global Clock Control (GCC) driver")
> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
> ---
> Evolution of:
> https://lore.kernel.org/linux-arm-msm/20230612-topic-rcg2_ro-v1-0-e7d824aeb628@linaro.org/
> ---
+CC Dmitry as b4 apparently didn't think of that
> drivers/clk/qcom/gcc-msm8996.c | 237 +----------------------------------------
> 1 file changed, 5 insertions(+), 232 deletions(-)
>
> diff --git a/drivers/clk/qcom/gcc-msm8996.c b/drivers/clk/qcom/gcc-msm8996.c
> index 14dcc3f03668..e7b03a17514a 100644
> --- a/drivers/clk/qcom/gcc-msm8996.c
> +++ b/drivers/clk/qcom/gcc-msm8996.c
> @@ -244,71 +244,6 @@ static const struct clk_parent_data gcc_xo_gpll0_gpll4_gpll0_early_div[] = {
> { .hw = &gpll0_early_div.hw }
> };
>
> -static const struct freq_tbl ftbl_system_noc_clk_src[] = {
> - F(19200000, P_XO, 1, 0, 0),
> - F(50000000, P_GPLL0_EARLY_DIV, 6, 0, 0),
> - F(100000000, P_GPLL0, 6, 0, 0),
> - F(150000000, P_GPLL0, 4, 0, 0),
> - F(200000000, P_GPLL0, 3, 0, 0),
> - F(240000000, P_GPLL0, 2.5, 0, 0),
> - { }
> -};
> -
> -static struct clk_rcg2 system_noc_clk_src = {
> - .cmd_rcgr = 0x0401c,
> - .hid_width = 5,
> - .parent_map = gcc_xo_gpll0_gpll0_early_div_map,
> - .freq_tbl = ftbl_system_noc_clk_src,
> - .clkr.hw.init = &(struct clk_init_data){
> - .name = "system_noc_clk_src",
> - .parent_data = gcc_xo_gpll0_gpll0_early_div,
> - .num_parents = ARRAY_SIZE(gcc_xo_gpll0_gpll0_early_div),
> - .ops = &clk_rcg2_ops,
> - },
> -};
> -
> -static const struct freq_tbl ftbl_config_noc_clk_src[] = {
> - F(19200000, P_XO, 1, 0, 0),
> - F(37500000, P_GPLL0, 16, 0, 0),
> - F(75000000, P_GPLL0, 8, 0, 0),
> - { }
> -};
> -
> -static struct clk_rcg2 config_noc_clk_src = {
> - .cmd_rcgr = 0x0500c,
> - .hid_width = 5,
> - .parent_map = gcc_xo_gpll0_map,
> - .freq_tbl = ftbl_config_noc_clk_src,
> - .clkr.hw.init = &(struct clk_init_data){
> - .name = "config_noc_clk_src",
> - .parent_data = gcc_xo_gpll0,
> - .num_parents = ARRAY_SIZE(gcc_xo_gpll0),
> - .ops = &clk_rcg2_ops,
> - },
> -};
> -
> -static const struct freq_tbl ftbl_periph_noc_clk_src[] = {
> - F(19200000, P_XO, 1, 0, 0),
> - F(37500000, P_GPLL0, 16, 0, 0),
> - F(50000000, P_GPLL0, 12, 0, 0),
> - F(75000000, P_GPLL0, 8, 0, 0),
> - F(100000000, P_GPLL0, 6, 0, 0),
> - { }
> -};
> -
> -static struct clk_rcg2 periph_noc_clk_src = {
> - .cmd_rcgr = 0x06014,
> - .hid_width = 5,
> - .parent_map = gcc_xo_gpll0_map,
> - .freq_tbl = ftbl_periph_noc_clk_src,
> - .clkr.hw.init = &(struct clk_init_data){
> - .name = "periph_noc_clk_src",
> - .parent_data = gcc_xo_gpll0,
> - .num_parents = ARRAY_SIZE(gcc_xo_gpll0),
> - .ops = &clk_rcg2_ops,
> - },
> -};
> -
> static const struct freq_tbl ftbl_usb30_master_clk_src[] = {
> F(19200000, P_XO, 1, 0, 0),
> F(120000000, P_GPLL0, 5, 0, 0),
> @@ -1297,11 +1232,7 @@ static struct clk_branch gcc_mmss_noc_cfg_ahb_clk = {
> .enable_mask = BIT(0),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_mmss_noc_cfg_ahb_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &config_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> - .flags = CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED,
> + .flags = CLK_IGNORE_UNUSED,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -1464,11 +1395,6 @@ static struct clk_branch gcc_usb_phy_cfg_ahb2phy_clk = {
> .enable_mask = BIT(0),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_usb_phy_cfg_ahb2phy_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &periph_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> - .flags = CLK_SET_RATE_PARENT,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -1498,11 +1424,6 @@ static struct clk_branch gcc_sdcc1_ahb_clk = {
> .enable_mask = BIT(0),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_sdcc1_ahb_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &periph_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> - .flags = CLK_SET_RATE_PARENT,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -1549,11 +1470,6 @@ static struct clk_branch gcc_sdcc2_ahb_clk = {
> .enable_mask = BIT(0),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_sdcc2_ahb_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &periph_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> - .flags = CLK_SET_RATE_PARENT,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -1583,11 +1499,6 @@ static struct clk_branch gcc_sdcc3_ahb_clk = {
> .enable_mask = BIT(0),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_sdcc3_ahb_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &periph_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> - .flags = CLK_SET_RATE_PARENT,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -1617,11 +1528,6 @@ static struct clk_branch gcc_sdcc4_ahb_clk = {
> .enable_mask = BIT(0),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_sdcc4_ahb_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &periph_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> - .flags = CLK_SET_RATE_PARENT,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -1635,11 +1541,6 @@ static struct clk_branch gcc_blsp1_ahb_clk = {
> .enable_mask = BIT(17),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_blsp1_ahb_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &periph_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> - .flags = CLK_SET_RATE_PARENT,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -1977,11 +1878,6 @@ static struct clk_branch gcc_blsp2_ahb_clk = {
> .enable_mask = BIT(15),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_blsp2_ahb_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &periph_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> - .flags = CLK_SET_RATE_PARENT,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -2318,11 +2214,6 @@ static struct clk_branch gcc_pdm_ahb_clk = {
> .enable_mask = BIT(0),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_pdm_ahb_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &periph_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> - .flags = CLK_SET_RATE_PARENT,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -2353,11 +2244,6 @@ static struct clk_branch gcc_prng_ahb_clk = {
> .enable_mask = BIT(13),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_prng_ahb_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &config_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> - .flags = CLK_SET_RATE_PARENT,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -2370,11 +2256,6 @@ static struct clk_branch gcc_tsif_ahb_clk = {
> .enable_mask = BIT(0),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_tsif_ahb_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &periph_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> - .flags = CLK_SET_RATE_PARENT,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -2422,11 +2303,6 @@ static struct clk_branch gcc_boot_rom_ahb_clk = {
> .enable_mask = BIT(10),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_boot_rom_ahb_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &config_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> - .flags = CLK_SET_RATE_PARENT,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -2520,11 +2396,6 @@ static struct clk_branch gcc_pcie_0_slv_axi_clk = {
> .enable_mask = BIT(0),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_pcie_0_slv_axi_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &system_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> - .flags = CLK_SET_RATE_PARENT,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -2537,11 +2408,6 @@ static struct clk_branch gcc_pcie_0_mstr_axi_clk = {
> .enable_mask = BIT(0),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_pcie_0_mstr_axi_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &system_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> - .flags = CLK_SET_RATE_PARENT,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -2554,11 +2420,6 @@ static struct clk_branch gcc_pcie_0_cfg_ahb_clk = {
> .enable_mask = BIT(0),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_pcie_0_cfg_ahb_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &config_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> - .flags = CLK_SET_RATE_PARENT,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -2606,11 +2467,6 @@ static struct clk_branch gcc_pcie_1_slv_axi_clk = {
> .enable_mask = BIT(0),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_pcie_1_slv_axi_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &system_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> - .flags = CLK_SET_RATE_PARENT,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -2623,11 +2479,6 @@ static struct clk_branch gcc_pcie_1_mstr_axi_clk = {
> .enable_mask = BIT(0),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_pcie_1_mstr_axi_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &system_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> - .flags = CLK_SET_RATE_PARENT,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -2640,11 +2491,6 @@ static struct clk_branch gcc_pcie_1_cfg_ahb_clk = {
> .enable_mask = BIT(0),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_pcie_1_cfg_ahb_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &config_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> - .flags = CLK_SET_RATE_PARENT,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -2692,11 +2538,6 @@ static struct clk_branch gcc_pcie_2_slv_axi_clk = {
> .enable_mask = BIT(0),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_pcie_2_slv_axi_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &system_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> - .flags = CLK_SET_RATE_PARENT,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -2709,11 +2550,6 @@ static struct clk_branch gcc_pcie_2_mstr_axi_clk = {
> .enable_mask = BIT(0),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_pcie_2_mstr_axi_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &system_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> - .flags = CLK_SET_RATE_PARENT,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -2726,11 +2562,6 @@ static struct clk_branch gcc_pcie_2_cfg_ahb_clk = {
> .enable_mask = BIT(0),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_pcie_2_cfg_ahb_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &config_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> - .flags = CLK_SET_RATE_PARENT,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -2778,11 +2609,6 @@ static struct clk_branch gcc_pcie_phy_cfg_ahb_clk = {
> .enable_mask = BIT(0),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_pcie_phy_cfg_ahb_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &config_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> - .flags = CLK_SET_RATE_PARENT,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -2829,11 +2655,6 @@ static struct clk_branch gcc_ufs_ahb_clk = {
> .enable_mask = BIT(0),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_ufs_ahb_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &config_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> - .flags = CLK_SET_RATE_PARENT,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -3060,11 +2881,7 @@ static struct clk_branch gcc_aggre0_snoc_axi_clk = {
> .enable_mask = BIT(0),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_aggre0_snoc_axi_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &system_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> - .flags = CLK_SET_RATE_PARENT | CLK_IS_CRITICAL,
> + .flags = CLK_IS_CRITICAL,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -3077,11 +2894,7 @@ static struct clk_branch gcc_aggre0_cnoc_ahb_clk = {
> .enable_mask = BIT(0),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_aggre0_cnoc_ahb_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &config_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> - .flags = CLK_SET_RATE_PARENT | CLK_IS_CRITICAL,
> + .flags = CLK_IS_CRITICAL,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -3094,11 +2907,7 @@ static struct clk_branch gcc_smmu_aggre0_axi_clk = {
> .enable_mask = BIT(0),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_smmu_aggre0_axi_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &system_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> - .flags = CLK_SET_RATE_PARENT | CLK_IS_CRITICAL,
> + .flags = CLK_IS_CRITICAL,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -3111,11 +2920,7 @@ static struct clk_branch gcc_smmu_aggre0_ahb_clk = {
> .enable_mask = BIT(0),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_smmu_aggre0_ahb_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &config_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> - .flags = CLK_SET_RATE_PARENT | CLK_IS_CRITICAL,
> + .flags = CLK_IS_CRITICAL,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -3162,10 +2967,6 @@ static struct clk_branch gcc_dcc_ahb_clk = {
> .enable_mask = BIT(0),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_dcc_ahb_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &config_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -3178,10 +2979,6 @@ static struct clk_branch gcc_aggre0_noc_mpu_cfg_ahb_clk = {
> .enable_mask = BIT(0),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_aggre0_noc_mpu_cfg_ahb_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &config_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -3194,11 +2991,6 @@ static struct clk_branch gcc_qspi_ahb_clk = {
> .enable_mask = BIT(0),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_qspi_ahb_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &periph_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> - .flags = CLK_SET_RATE_PARENT,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -3347,10 +3139,6 @@ static struct clk_branch gcc_mss_cfg_ahb_clk = {
> .enable_mask = BIT(0),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_mss_cfg_ahb_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &config_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -3363,10 +3151,6 @@ static struct clk_branch gcc_mss_mnoc_bimc_axi_clk = {
> .enable_mask = BIT(0),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_mss_mnoc_bimc_axi_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &system_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -3379,10 +3163,6 @@ static struct clk_branch gcc_mss_snoc_axi_clk = {
> .enable_mask = BIT(0),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_mss_snoc_axi_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &system_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -3395,10 +3175,6 @@ static struct clk_branch gcc_mss_q6_bimc_axi_clk = {
> .enable_mask = BIT(0),
> .hw.init = &(struct clk_init_data){
> .name = "gcc_mss_q6_bimc_axi_clk",
> - .parent_hws = (const struct clk_hw*[]){
> - &system_noc_clk_src.clkr.hw,
> - },
> - .num_parents = 1,
> .ops = &clk_branch2_ops,
> },
> },
> @@ -3495,9 +3271,6 @@ static struct clk_regmap *gcc_msm8996_clocks[] = {
> [GPLL0] = &gpll0.clkr,
> [GPLL4_EARLY] = &gpll4_early.clkr,
> [GPLL4] = &gpll4.clkr,
> - [SYSTEM_NOC_CLK_SRC] = &system_noc_clk_src.clkr,
> - [CONFIG_NOC_CLK_SRC] = &config_noc_clk_src.clkr,
> - [PERIPH_NOC_CLK_SRC] = &periph_noc_clk_src.clkr,
> [USB30_MASTER_CLK_SRC] = &usb30_master_clk_src.clkr,
> [USB30_MOCK_UTMI_CLK_SRC] = &usb30_mock_utmi_clk_src.clkr,
> [USB3_PHY_AUX_CLK_SRC] = &usb3_phy_aux_clk_src.clkr,
>
> ---
> base-commit: 56585460cc2ec44fc5d66924f0a116f57080f0dc
> change-id: 20230830-topic-rpmbusclocks8996gcc-78cc0be4d475
>
> Best regards,
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