Thread (19 messages) 19 messages, 4 authors, 2020-02-14

Re: [PATCH v2 6/7] clk: qcom: gcc: Add global clock controller driver for SM8250

From: Vinod Koul <vkoul@kernel.org>
Date: 2020-02-14 13:09:31
Also in: linux-arm-kernel, linux-arm-msm, linux-clk, lkml

On 05-02-20, 11:40, Stephen Boyd wrote:
quoted
+static const struct clk_parent_data gcc_parent_data_2[] = {
+       { .fw_name = "bi_tcxo" },
+       { .fw_name = "sleep_clk", .name = "sleep_clk" },
Please drop .name
Yup, will do
quoted
+static const struct clk_parent_data gcc_parent_data_5[] = {
+       { .fw_name = "bi_tcxo" },
+       { .hw = &gpll0.clkr.hw },
+       { .fw_name = "aud_ref_clk", .name = "aud_ref_clk" },
Why have .name? Pleas remove it.
Dropped...
quoted
+       { .hw = &gpll0_out_even.clkr.hw },
+       { .fw_name = "core_bi_pll_test_se", .name = "core_bi_pll_test_se" },
Please drop these test inputs. I don't see any reason why they're listed.
Dropped this and rest.
quoted
+static struct clk_branch gcc_sys_noc_cpuss_ahb_clk = {
+       .halt_reg = 0x48198,
+       .halt_check = BRANCH_HALT_VOTED,
+       .clkr = {
+               .enable_reg = 0x52000,
+               .enable_mask = BIT(0),
+               .hw.init = &(struct clk_init_data){
+                       .name = "gcc_sys_noc_cpuss_ahb_clk",
+                       .parent_data = &(const struct clk_parent_data){
+                               .hw = &gcc_cpuss_ahb_postdiv_clk_src.clkr.hw,
+                       },
+                       .num_parents = 1,
+                       .flags = CLK_IS_CRITICAL | CLK_SET_RATE_PARENT,
+                       .ops = &clk_branch2_ops,
+               },
+       },
+};
Is there a need for this clk to be exposed? Why can't we just turn the
bit on in probe and ignore it after that? I'd prefer to not have
CLK_IS_CRITICAL in this driver unless necessary.
yeah moved it as setting a bit in probe..
quoted
+       /*
+        * Keep the clocks always-ON
+        * GCC_VIDEO_AHB_CLK, GCC_CAMERA_AHB_CLK, GCC_DISP_AHB_CLK,
+        * GCC_CPUSS_DVM_BUS_CLK, GCC_GPU_CFG_AHB_CLK
+        */
+       regmap_update_bits(regmap, 0x0b004, BIT(0), BIT(0));
+       regmap_update_bits(regmap, 0x0b008, BIT(0), BIT(0));
+       regmap_update_bits(regmap, 0x0b00c, BIT(0), BIT(0));
+       regmap_update_bits(regmap, 0x4818c, BIT(0), BIT(0));
+       regmap_update_bits(regmap, 0x71004, BIT(0), BIT(0));
These look like the AHB clks above that we just enabled and then ignore.
right, I think these are rest of the always-on clocks

-- 
~Vinod
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