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