| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * (C) Copyright 2022 - Analog Devices, Inc. |
| * |
| * Written and/or maintained by Timesys Corporation |
| * |
| * Author: Greg Malysa <greg.malysa@timesys.com> |
| * |
| * Ported from Linux: Nathan Barrett-Morrison <nathan.morrison@timesys.com> |
| */ |
| |
| #include <clk.h> |
| #include <clk-uclass.h> |
| #include <dm.h> |
| #include <dt-bindings/clock/adi-sc5xx-clock.h> |
| #include <linux/compiler_types.h> |
| #include <linux/clk-provider.h> |
| #include <linux/io.h> |
| #include <linux/ioport.h> |
| #include <linux/printk.h> |
| #include <linux/types.h> |
| |
| #include "clk.h" |
| |
| static const char * const cgu1_in_sels[] = {"sys_clkin0", "sys_clkin1"}; |
| static const char * const sharc0_sels[] = {"cclk0_0", "sysclk_0", "dummy", "dummy"}; |
| static const char * const sharc1_sels[] = {"cclk0_0", "sysclk_0", "dummy", "dummy"}; |
| static const char * const arm_sels[] = {"cclk1_0", "sysclk_0", "dummy", "dummy"}; |
| static const char * const cdu_ddr_sels[] = {"dclk_0", "dclk_1", "dummy", "dummy"}; |
| static const char * const can_sels[] = {"oclk_0", "oclk_1", "dclk_1", "dummy"}; |
| static const char * const spdif_sels[] = {"oclk_0", "oclk_1", "dclk_1", "dclk_0"}; |
| static const char * const reserved_sels[] = {"sclk0_0", "oclk_0", "dummy", "dummy"}; |
| static const char * const gige_sels[] = {"sclk0_0", "sclk1_1", "cclk0_1", "oclk_0"}; |
| static const char * const lp_sels[] = {"sclk0_0", "sclk0_1", "cclk1_1", "dclk_1"}; |
| static const char * const sdio_sels[] = {"oclk_0_half", "cclk1_1_half", "cclk1_1", |
| "dclk_1"}; |
| |
| static int sc58x_clock_probe(struct udevice *dev) |
| { |
| void __iomem *cgu0; |
| void __iomem *cgu1; |
| void __iomem *cdu; |
| int ret; |
| struct resource res; |
| |
| struct clk *clks[ADSP_SC58X_CLK_END]; |
| struct clk dummy, clkin0, clkin1; |
| |
| ret = dev_read_resource_byname(dev, "cgu0", &res); |
| if (ret) |
| return ret; |
| cgu0 = devm_ioremap(dev, res.start, resource_size(&res)); |
| |
| ret = dev_read_resource_byname(dev, "cgu1", &res); |
| if (ret) |
| return ret; |
| cgu1 = devm_ioremap(dev, res.start, resource_size(&res)); |
| |
| ret = dev_read_resource_byname(dev, "cdu", &res); |
| if (ret) |
| return ret; |
| cdu = devm_ioremap(dev, res.start, resource_size(&res)); |
| |
| // Input clock configuration |
| clk_get_by_name(dev, "dummy", &dummy); |
| clk_get_by_name(dev, "sys_clkin0", &clkin0); |
| clk_get_by_name(dev, "sys_clkin1", &clkin1); |
| |
| clks[ADSP_SC58X_CLK_DUMMY] = &dummy; |
| clks[ADSP_SC58X_CLK_SYS_CLKIN0] = &clkin0; |
| clks[ADSP_SC58X_CLK_SYS_CLKIN1] = &clkin1; |
| |
| clks[ADSP_SC58X_CLK_CGU1_IN] = clk_register_mux(NULL, "cgu1_in_sel", cgu1_in_sels, |
| 2, CLK_SET_RATE_PARENT, |
| cdu + CDU_CLKINSEL, 0, 1, 0); |
| |
| // CGU configuration and internal clocks |
| clks[ADSP_SC58X_CLK_CGU0_PLL_IN] = clk_register_divider(NULL, "cgu0_df", |
| "sys_clkin0", |
| CLK_SET_RATE_PARENT, |
| cgu0 + CGU_CTL, 0, 1, 0); |
| clks[ADSP_SC58X_CLK_CGU1_PLL_IN] = clk_register_divider(NULL, "cgu1_df", |
| "cgu1_in_sel", |
| CLK_SET_RATE_PARENT, |
| cgu1 + CGU_CTL, 0, 1, 0); |
| |
| // VCO output inside PLL |
| clks[ADSP_SC58X_CLK_CGU0_VCO_OUT] = sc5xx_cgu_pll("cgu0_vco", "cgu0_df", |
| cgu0 + CGU_CTL, CGU_MSEL_SHIFT, |
| CGU_MSEL_WIDTH, 0, false); |
| clks[ADSP_SC58X_CLK_CGU1_VCO_OUT] = sc5xx_cgu_pll("cgu1_vco", "cgu1_df", |
| cgu1 + CGU_CTL, CGU_MSEL_SHIFT, |
| CGU_MSEL_WIDTH, 0, false); |
| |
| // Final PLL output |
| clks[ADSP_SC58X_CLK_CGU0_PLLCLK] = clk_register_fixed_factor(NULL, "cgu0_pllclk", |
| "cgu0_vco", |
| CLK_SET_RATE_PARENT, |
| 1, 1); |
| clks[ADSP_SC58X_CLK_CGU1_PLLCLK] = clk_register_fixed_factor(NULL, "cgu1_pllclk", |
| "cgu1_vco", |
| CLK_SET_RATE_PARENT, |
| 1, 1); |
| |
| // Dividers from pll output |
| clks[ADSP_SC58X_CLK_CGU0_CDIV] = cgu_divider("cgu0_cdiv", "cgu0_pllclk", |
| cgu0 + CGU_DIV, 0, 5, 0); |
| clks[ADSP_SC58X_CLK_CGU0_SYSCLK] = cgu_divider("sysclk_0", "cgu0_pllclk", |
| cgu0 + CGU_DIV, 8, 5, 0); |
| clks[ADSP_SC58X_CLK_CGU0_DDIV] = cgu_divider("cgu0_ddiv", "cgu0_pllclk", |
| cgu0 + CGU_DIV, 16, 5, 0); |
| clks[ADSP_SC58X_CLK_CGU0_ODIV] = cgu_divider("cgu0_odiv", "cgu0_pllclk", |
| cgu0 + CGU_DIV, 22, 7, 0); |
| clks[ADSP_SC58X_CLK_CGU0_S0SELDIV] = cgu_divider("cgu0_s0seldiv", "sysclk_0", |
| cgu0 + CGU_DIV, 5, 3, 0); |
| clks[ADSP_SC58X_CLK_CGU0_S1SELDIV] = cgu_divider("cgu0_s1seldiv", "sysclk_0", |
| cgu0 + CGU_DIV, 13, 3, 0); |
| |
| clks[ADSP_SC58X_CLK_CGU1_CDIV] = cgu_divider("cgu1_cdiv", "cgu1_pllclk", |
| cgu1 + CGU_DIV, 0, 5, 0); |
| clks[ADSP_SC58X_CLK_CGU1_SYSCLK] = cgu_divider("sysclk_1", "cgu1_pllclk", |
| cgu1 + CGU_DIV, 8, 5, 0); |
| clks[ADSP_SC58X_CLK_CGU1_DDIV] = cgu_divider("cgu1_ddiv", "cgu1_pllclk", |
| cgu1 + CGU_DIV, 16, 5, 0); |
| clks[ADSP_SC58X_CLK_CGU1_ODIV] = cgu_divider("cgu1_odiv", "cgu1_pllclk", |
| cgu1 + CGU_DIV, 22, 7, 0); |
| clks[ADSP_SC58X_CLK_CGU1_S0SELDIV] = cgu_divider("cgu1_s0seldiv", "sysclk_1", |
| cgu1 + CGU_DIV, 5, 3, 0); |
| clks[ADSP_SC58X_CLK_CGU1_S1SELDIV] = cgu_divider("cgu1_s1seldiv", "sysclk_1", |
| cgu1 + CGU_DIV, 13, 3, 0); |
| |
| // Gates to enable CGU outputs |
| clks[ADSP_SC58X_CLK_CGU0_CCLK0] = cgu_gate("cclk0_0", "cgu0_cdiv", |
| cgu0 + CGU_CCBF_DIS, 0); |
| clks[ADSP_SC58X_CLK_CGU0_CCLK1] = cgu_gate("cclk1_0", "cgu0_cdiv", |
| cgu1 + CGU_CCBF_DIS, 1); |
| clks[ADSP_SC58X_CLK_CGU0_OCLK] = cgu_gate("oclk_0", "cgu0_odiv", |
| cgu0 + CGU_SCBF_DIS, 3); |
| clks[ADSP_SC58X_CLK_CGU0_DCLK] = cgu_gate("dclk_0", "cgu0_ddiv", |
| cgu0 + CGU_SCBF_DIS, 2); |
| clks[ADSP_SC58X_CLK_CGU0_SCLK1] = cgu_gate("sclk1_0", "cgu0_s1seldiv", |
| cgu0 + CGU_SCBF_DIS, 1); |
| clks[ADSP_SC58X_CLK_CGU0_SCLK0] = cgu_gate("sclk0_0", "cgu0_s0seldiv", |
| cgu0 + CGU_SCBF_DIS, 0); |
| |
| clks[ADSP_SC58X_CLK_CGU1_CCLK0] = cgu_gate("cclk0_1", "cgu1_cdiv", |
| cgu1 + CGU_CCBF_DIS, 0); |
| clks[ADSP_SC58X_CLK_CGU1_CCLK1] = cgu_gate("cclk1_1", "cgu1_cdiv", |
| cgu1 + CGU_CCBF_DIS, 1); |
| clks[ADSP_SC58X_CLK_CGU1_OCLK] = cgu_gate("oclk_1", "cgu1_odiv", |
| cgu1 + CGU_SCBF_DIS, 3); |
| clks[ADSP_SC58X_CLK_CGU1_DCLK] = cgu_gate("dclk_1", "cgu1_ddiv", |
| cgu1 + CGU_SCBF_DIS, 2); |
| clks[ADSP_SC58X_CLK_CGU1_SCLK1] = cgu_gate("sclk1_1", "cgu1_s1seldiv", |
| cgu1 + CGU_SCBF_DIS, 1); |
| clks[ADSP_SC58X_CLK_CGU1_SCLK0] = cgu_gate("sclk0_1", "cgu1_s0seldiv", |
| cgu1 + CGU_SCBF_DIS, 0); |
| |
| // Extra half rate clocks generated in the CDU |
| clks[ADSP_SC58X_CLK_OCLK0_HALF] = clk_register_fixed_factor(NULL, "oclk_0_half", |
| "oclk_0", |
| CLK_SET_RATE_PARENT, |
| 1, 2); |
| clks[ADSP_SC58X_CLK_CCLK1_1_HALF] = clk_register_fixed_factor(NULL, |
| "cclk1_1_half", |
| "cclk1_1", |
| CLK_SET_RATE_PARENT, |
| 1, 2); |
| |
| // CDU output muxes |
| clks[ADSP_SC58X_CLK_SHARC0_SEL] = cdu_mux("sharc0_sel", cdu + CDU_CFG0, |
| sharc0_sels); |
| clks[ADSP_SC58X_CLK_SHARC1_SEL] = cdu_mux("sharc1_sel", cdu + CDU_CFG1, |
| sharc1_sels); |
| clks[ADSP_SC58X_CLK_ARM_SEL] = cdu_mux("arm_sel", cdu + CDU_CFG2, arm_sels); |
| clks[ADSP_SC58X_CLK_CDU_DDR_SEL] = cdu_mux("cdu_ddr_sel", cdu + CDU_CFG3, |
| cdu_ddr_sels); |
| clks[ADSP_SC58X_CLK_CAN_SEL] = cdu_mux("can_sel", cdu + CDU_CFG4, can_sels); |
| clks[ADSP_SC58X_CLK_SPDIF_SEL] = cdu_mux("spdif_sel", cdu + CDU_CFG5, spdif_sels); |
| clks[ADSP_SC58X_CLK_RESERVED_SEL] = cdu_mux("reserved_sel", cdu + CDU_CFG6, |
| reserved_sels); |
| clks[ADSP_SC58X_CLK_GIGE_SEL] = cdu_mux("gige_sel", cdu + CDU_CFG7, gige_sels); |
| clks[ADSP_SC58X_CLK_LP_SEL] = cdu_mux("lp_sel", cdu + CDU_CFG8, lp_sels); |
| clks[ADSP_SC58X_CLK_SDIO_SEL] = cdu_mux("sdio_sel", cdu + CDU_CFG9, sdio_sels); |
| |
| // CDU output enable gates |
| clks[ADSP_SC58X_CLK_SHARC0] = cdu_gate("sharc0", "sharc0_sel", cdu + CDU_CFG0, |
| CLK_IS_CRITICAL); |
| clks[ADSP_SC58X_CLK_SHARC1] = cdu_gate("sharc1", "sharc1_sel", cdu + CDU_CFG1, |
| CLK_IS_CRITICAL); |
| clks[ADSP_SC58X_CLK_ARM] = cdu_gate("arm", "arm_sel", cdu + CDU_CFG2, |
| CLK_IS_CRITICAL); |
| clks[ADSP_SC58X_CLK_CDU_DDR] = cdu_gate("cdu_ddr", "cdu_ddr_sel", cdu + CDU_CFG3, |
| CLK_IS_CRITICAL); |
| clks[ADSP_SC58X_CLK_CAN] = cdu_gate("can", "can_sel", cdu + CDU_CFG4, 0); |
| clks[ADSP_SC58X_CLK_SPDIF] = cdu_gate("spdif", "spdif_sel", cdu + CDU_CFG5, 0); |
| clks[ADSP_SC58X_CLK_RESERVED] = cdu_gate("reserved", "reserved_sel", |
| cdu + CDU_CFG6, 0); |
| clks[ADSP_SC58X_CLK_GIGE] = cdu_gate("gige", "gige_sel", cdu + CDU_CFG7, 0); |
| clks[ADSP_SC58X_CLK_LP] = cdu_gate("lp", "lp_sel", cdu + CDU_CFG8, 0); |
| clks[ADSP_SC58X_CLK_SDIO] = cdu_gate("sdio", "sdio_sel", cdu + CDU_CFG9, 0); |
| |
| ret = cdu_check_clocks(clks, ARRAY_SIZE(clks)); |
| if (ret) |
| pr_err("CDU error detected\n"); |
| |
| return ret; |
| } |
| |
| static const struct udevice_id adi_sc58x_clk_ids[] = { |
| { .compatible = "adi,sc58x-clocks" }, |
| { }, |
| }; |
| |
| U_BOOT_DRIVER(adi_sc58x_clk) = { |
| .name = "clk_adi_sc58x", |
| .id = UCLASS_CLK, |
| .of_match = adi_sc58x_clk_ids, |
| .ops = &adi_clk_ops, |
| .probe = sc58x_clock_probe, |
| .flags = DM_FLAG_PRE_RELOC, |
| }; |