[PATCH v1 4/4] clk: qcom: lpass: Add support for LPASS clock controller for SC7180

Taniya Das
2020-03-27T19:48:58Z

The Low Power Audio subsystem clocks are required for Audio client
to be able to request for the clocks and power domains.

Signed-off-by: Taniya Das <tdas@codeaurora.org>
---
drivers/clk/qcom/Kconfig | 9 +
drivers/clk/qcom/Makefile | 1 +
drivers/clk/qcom/lpasscorecc-sc7180.c | 479 ++++++++++++++++++++++++++++++++++
3 files changed, 489 insertions(+)
create mode 100644 drivers/clk/qcom/lpasscorecc-sc7180.c

diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig
index 11ec6f4..732e91d 100644
--- a/drivers/clk/qcom/Kconfig
+++ b/drivers/clk/qcom/Kconfig
@@ -272,6 +272,15 @@ config SC_GCC_7180
Say Y if you want to use peripheral devices such as UART, SPI,
I2C, USB, UFS, SDCC, etc.

+config SC_LPASS_CORECC_7180
+ tristate "SC7180 LPASS Core Clock Controller"
+ select SC_GCC_7180
+ help
+ Support for the LPASS(Low Power Audio Subsystem) core clock controller
+ on SC7180 devices.
+ Say Y if you want to use LPASS clocks and power domains of the LPASS
+ core clock controller.
+
config SC_GPUCC_7180
tristate "SC7180 Graphics Clock Controller"
select SC_GCC_7180
diff --git a/drivers/clk/qcom/Makefile b/drivers/clk/qcom/Makefile
index 691efbf..cb29262 100644
--- a/drivers/clk/qcom/Makefile
+++ b/drivers/clk/qcom/Makefile
@@ -50,6 +50,7 @@ obj-$(CONFIG_QCS_TURING_404) += turingcc-qcs404.o
obj-$(CONFIG_SC_DISPCC_7180) += dispcc-sc7180.o
obj-$(CONFIG_SC_GCC_7180) += gcc-sc7180.o
obj-$(CONFIG_SC_GPUCC_7180) += gpucc-sc7180.o
+obj-$(CONFIG_SC_LPASS_CORECC_7180) += lpasscorecc-sc7180.o
obj-$(CONFIG_SC_MSS_7180) += mss-sc7180.o
obj-$(CONFIG_SC_VIDEOCC_7180) += videocc-sc7180.o
obj-$(CONFIG_SDM_CAMCC_845) += camcc-sdm845.o
diff --git a/drivers/clk/qcom/lpasscorecc-sc7180.c b/drivers/clk/qcom/lpasscorecc-sc7180.c
new file mode 100644
index 0000000..86e3599
--- /dev/null
+++ b/drivers/clk/qcom/lpasscorecc-sc7180.c
@@ -0,0 +1,479 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2020, The Linux Foundation. All rights reserved.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/pm_clock.h>
+#include <linux/pm_runtime.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+
+#include <dt-bindings/clock/qcom,lpasscorecc-sc7180.h>
+
+#include "clk-alpha-pll.h"
+#include "clk-branch.h"
+#include "clk-rcg.h"
+#include "clk-regmap.h"
+#include "common.h"
+#include "gdsc.h"
+
+enum {
+ P_BI_TCXO,
+ P_LPASS_LPAAUDIO_DIG_PLL_OUT_ODD,
+ P_SLEEP_CLK,
+};
+
+static struct pll_vco fabia_vco[] = {
+ { 249600000, 2000000000, 0 },
+};
+
+static const struct alpha_pll_config lpass_lpaaudio_dig_pll_config = {
+ .l = 0x20,
+ .alpha = 0x0,
+ .config_ctl_val = 0x20485699,
+ .config_ctl_hi_val = 0x00002067,
+ .test_ctl_val = 0x40000000,
+ .test_ctl_hi_val = 0x00000000,
+ .user_ctl_val = 0x00005105,
+ .user_ctl_hi_val = 0x00004805,
+};
+
+static const u8 clk_alpha_pll_regs_offset[][PLL_OFF_MAX_REGS] = {
+ [CLK_ALPHA_PLL_TYPE_FABIA] = {
+ [PLL_OFF_L_VAL] = 0x04,
+ [PLL_OFF_CAL_L_VAL] = 0x8,
+ [PLL_OFF_USER_CTL] = 0x0c,
+ [PLL_OFF_USER_CTL_U] = 0x10,
+ [PLL_OFF_USER_CTL_U1] = 0x14,
+ [PLL_OFF_CONFIG_CTL] = 0x18,
+ [PLL_OFF_CONFIG_CTL_U] = 0x1C,
+ [PLL_OFF_CONFIG_CTL_U1] = 0x20,
+ [PLL_OFF_TEST_CTL] = 0x24,
+ [PLL_OFF_TEST_CTL_U] = 0x28,
+ [PLL_OFF_STATUS] = 0x30,
+ [PLL_OFF_OPMODE] = 0x38,
+ [PLL_OFF_FRAC] = 0x40,
+ },
+};
+
+static struct clk_alpha_pll lpass_lpaaudio_dig_pll = {
+ .offset = 0x1000,
+ .vco_table = fabia_vco,
+ .num_vco = ARRAY_SIZE(fabia_vco),
+ .regs = clk_alpha_pll_regs_offset[CLK_ALPHA_PLL_TYPE_FABIA],
+ .clkr = {
+ .hw.init = &(struct clk_init_data){
+ .name = "lpass_lpaaudio_dig_pll",
+ .parent_data = &(const struct clk_parent_data){
+ .fw_name = "bi_tcxo",
+ .name = "bi_tcxo",
+ },
+ .num_parents = 1,
+ .ops = &clk_alpha_pll_fabia_ops,
+ },
+ },
+};
+
+static const struct clk_div_table
+ post_div_table_lpass_lpaaudio_dig_pll_out_odd[] = {
+ { 0x5, 5 },
+ { }
+};
+
+static struct clk_alpha_pll_postdiv lpass_lpaaudio_dig_pll_out_odd = {
+ .offset = 0x1000,
+ .post_div_shift = 12,
+ .post_div_table = post_div_table_lpass_lpaaudio_dig_pll_out_odd,
+ .num_post_div =
+ ARRAY_SIZE(post_div_table_lpass_lpaaudio_dig_pll_out_odd),
+ .width = 4,
+ .regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_FABIA],
+ .clkr.hw.init = &(struct clk_init_data){
+ .name = "lpass_lpaaudio_dig_pll_out_odd",
+ .parent_data = &(const struct clk_parent_data){
+ .hw = &lpass_lpaaudio_dig_pll.clkr.hw,
+ },
+ .num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
+ .ops = &clk_alpha_pll_postdiv_fabia_ops,
+ },
+};
+
+static const struct parent_map lpass_core_cc_parent_map_0[] = {
+ { P_BI_TCXO, 0 },
+ { P_LPASS_LPAAUDIO_DIG_PLL_OUT_ODD, 5 },
+};
+
+static const struct clk_parent_data lpass_core_cc_parent_data_0[] = {
+ { .fw_name = "bi_tcxo", .name = "bi_tcxo" },
+ { .hw = &lpass_lpaaudio_dig_pll_out_odd.clkr.hw },
+};
+
+static const struct parent_map lpass_core_cc_parent_map_2[] = {
+ { P_BI_TCXO, 0 },
+};
+
+static struct clk_rcg2 core_clk_src = {
+ .cmd_rcgr = 0x1d000,
+ .mnd_width = 8,
+ .hid_width = 5,
+ .parent_map = lpass_core_cc_parent_map_2,
+ .clkr.hw.init = &(struct clk_init_data){
+ .name = "core_clk_src",
+ .parent_data = &(const struct clk_parent_data){
+ .fw_name = "bi_tcxo",
+ },
+ .num_parents = 1,
+ .ops = &clk_rcg2_ops,
+ },
+};
+
+static const struct freq_tbl ftbl_ext_mclk0_clk_src[] = {
+ F(9600000, P_BI_TCXO, 2, 0, 0),
+ F(19200000, P_BI_TCXO, 1, 0, 0),
+ { }
+};
+
+static const struct freq_tbl ftbl_ext_lpaif_clk_src[] = {
+ F(256000, P_LPASS_LPAAUDIO_DIG_PLL_OUT_ODD, 15, 1, 32),
+ F(512000, P_LPASS_LPAAUDIO_DIG_PLL_OUT_ODD, 15, 1, 16),
+ F(768000, P_LPASS_LPAAUDIO_DIG_PLL_OUT_ODD, 10, 1, 16),
+ F(1024000, P_LPASS_LPAAUDIO_DIG_PLL_OUT_ODD, 15, 1, 8),
+ F(1536000, P_LPASS_LPAAUDIO_DIG_PLL_OUT_ODD, 10, 1, 8),
+ F(2048000, P_LPASS_LPAAUDIO_DIG_PLL_OUT_ODD, 15, 1, 4),
+ F(3072000, P_LPASS_LPAAUDIO_DIG_PLL_OUT_ODD, 10, 1, 4),
+ F(4096000, P_LPASS_LPAAUDIO_DIG_PLL_OUT_ODD, 15, 1, 2),
+ F(6144000, P_LPASS_LPAAUDIO_DIG_PLL_OUT_ODD, 10, 1, 2),
+ F(8192000, P_LPASS_LPAAUDIO_DIG_PLL_OUT_ODD, 15, 0, 0),
+ F(9600000, P_BI_TCXO, 2, 0, 0),
+ F(12288000, P_LPASS_LPAAUDIO_DIG_PLL_OUT_ODD, 10, 0, 0),
+ F(19200000, P_BI_TCXO, 1, 0, 0),
+ F(24576000, P_LPASS_LPAAUDIO_DIG_PLL_OUT_ODD, 5, 0, 0),
+ { }
+};
+
+static struct clk_rcg2 ext_mclk0_clk_src = {
+ .cmd_rcgr = 0x20000,
+ .mnd_width = 8,
+ .hid_width = 5,
+ .parent_map = lpass_core_cc_parent_map_0,
+ .freq_tbl = ftbl_ext_mclk0_clk_src,
+ .clkr.hw.init = &(struct clk_init_data){
+ .name = "ext_mclk0_clk_src",
+ .parent_data = lpass_core_cc_parent_data_0,
+ .num_parents = 2,
+ .flags = CLK_SET_RATE_PARENT,
+ .ops = &clk_rcg2_ops,
+ },
+};
+
+static struct clk_rcg2 lpaif_pri_clk_src = {
+ .cmd_rcgr = 0x10000,
+ .mnd_width = 16,
+ .hid_width = 5,
+ .parent_map = lpass_core_cc_parent_map_0,
+ .freq_tbl = ftbl_ext_lpaif_clk_src,
+ .clkr.hw.init = &(struct clk_init_data){
+ .name = "lpaif_pri_clk_src",
+ .parent_data = lpass_core_cc_parent_data_0,
+ .num_parents = 2,
+ .flags = CLK_SET_RATE_PARENT,
+ .ops = &clk_rcg2_ops,
+ },
+};
+
+static struct clk_rcg2 lpaif_sec_clk_src = {
+ .cmd_rcgr = 0x11000,
+ .mnd_width = 16,
+ .hid_width = 5,
+ .parent_map = lpass_core_cc_parent_map_0,
+ .freq_tbl = ftbl_ext_lpaif_clk_src,
+ .clkr.hw.init = &(struct clk_init_data){
+ .name = "lpaif_sec_clk_src",
+ .parent_data = lpass_core_cc_parent_data_0,
+ .num_parents = 2,
+ .flags = CLK_SET_RATE_PARENT,
+ .ops = &clk_rcg2_ops,
+ },
+};
+
+static struct clk_branch lpass_audio_core_ext_mclk0_clk = {
+ .halt_reg = 0x20014,
+ .halt_check = BRANCH_HALT,
+ .hwcg_reg = 0x20014,
+ .hwcg_bit = 1,
+ .clkr = {
+ .enable_reg = 0x20014,
+ .enable_mask = BIT(0),
+ .hw.init = &(struct clk_init_data){
+ .name = "lpass_audio_core_ext_mclk0_clk",
+ .parent_data = &(const struct clk_parent_data){
+ .hw = &ext_mclk0_clk_src.clkr.hw,
+ },
+ .num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
+ .ops = &clk_branch2_ops,
+ },
+ },
+};
+
+static struct clk_branch lpass_audio_core_lpaif_pri_ibit_clk = {
+ .halt_reg = 0x10018,
+ .halt_check = BRANCH_HALT,
+ .hwcg_reg = 0x10018,
+ .hwcg_bit = 1,
+ .clkr = {
+ .enable_reg = 0x10018,
+ .enable_mask = BIT(0),
+ .hw.init = &(struct clk_init_data){
+ .name = "lpass_audio_core_lpaif_pri_ibit_clk",
+ .parent_data = &(const struct clk_parent_data){
+ .hw = &lpaif_pri_clk_src.clkr.hw,
+ },
+ .num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
+ .ops = &clk_branch2_ops,
+ },
+ },
+};
+
+static struct clk_branch lpass_audio_core_lpaif_sec_ibit_clk = {
+ .halt_reg = 0x11018,
+ .halt_check = BRANCH_HALT,
+ .hwcg_reg = 0x11018,
+ .hwcg_bit = 1,
+ .clkr = {
+ .enable_reg = 0x11018,
+ .enable_mask = BIT(0),
+ .hw.init = &(struct clk_init_data){
+ .name = "lpass_audio_core_lpaif_sec_ibit_clk",
+ .parent_data = &(const struct clk_parent_data){
+ .hw = &lpaif_sec_clk_src.clkr.hw,
+ },
+ .num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
+ .ops = &clk_branch2_ops,
+ },
+ },
+};
+
+static struct clk_branch lpass_audio_core_sysnoc_mport_core_clk = {
+ .halt_reg = 0x23000,
+ .halt_check = BRANCH_HALT,
+ .hwcg_reg = 0x23000,
+ .hwcg_bit = 1,
+ .clkr = {
+ .enable_reg = 0x23000,
+ .enable_mask = BIT(0),
+ .hw.init = &(struct clk_init_data){
+ .name = "lpass_audio_core_sysnoc_mport_core_clk",
+ .parent_data = &(const struct clk_parent_data){
+ .hw = &core_clk_src.clkr.hw,
+ },
+ .num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
+ .ops = &clk_branch2_ops,
+ },
+ },
+};
+
+static struct clk_regmap *lpass_core_cc_sc7180_clocks[] = {
+ [EXT_MCLK0_CLK_SRC] = &ext_mclk0_clk_src.clkr,
+ [LPAIF_PRI_CLK_SRC] = &lpaif_pri_clk_src.clkr,
+ [LPAIF_SEC_CLK_SRC] = &lpaif_sec_clk_src.clkr,
+ [CORE_CLK_SRC] = &core_clk_src.clkr,
+ [LPASS_AUDIO_CORE_EXT_MCLK0_CLK] = &lpass_audio_core_ext_mclk0_clk.clkr,
+ [LPASS_AUDIO_CORE_LPAIF_PRI_IBIT_CLK] =
+ &lpass_audio_core_lpaif_pri_ibit_clk.clkr,
+ [LPASS_AUDIO_CORE_LPAIF_SEC_IBIT_CLK] =
+ &lpass_audio_core_lpaif_sec_ibit_clk.clkr,
+ [LPASS_AUDIO_CORE_SYSNOC_MPORT_CORE_CLK] =
+ &lpass_audio_core_sysnoc_mport_core_clk.clkr,
+ [LPASS_LPAAUDIO_DIG_PLL] = &lpass_lpaaudio_dig_pll.clkr,
+ [LPASS_LPAAUDIO_DIG_PLL_OUT_ODD] = &lpass_lpaaudio_dig_pll_out_odd.clkr,
+};
+
+static struct gdsc lpass_pdc_hm_gdsc = {
+ .gdscr = 0x3090,
+ .pd = {
+ .name = "lpass_pdc_hm_gdsc",
+ },
+ .pwrsts = PWRSTS_OFF_ON,
+ .flags = VOTABLE,
+};
+
+static struct gdsc lpass_audio_hm_gdsc = {
+ .gdscr = 0x9090,
+ .pd = {
+ .name = "lpass_audio_hm_gdsc",
+ },
+ .pwrsts = PWRSTS_OFF_ON,
+};
+
+static struct gdsc lpass_core_hm_gdsc = {
+ .gdscr = 0x0,
+ .pd = {
+ .name = "lpass_core_hm_gdsc",
+ },
+ .pwrsts = PWRSTS_OFF_ON,
+ .flags = RETAIN_FF_ENABLE,
+};
+
+static struct gdsc *lpass_core_hm_sc7180_gdscs[] = {
+ [LPASS_CORE_HM_GDSCR] = &lpass_core_hm_gdsc,
+};
+
+static struct gdsc *lpass_audio_hm_sc7180_gdscs[] = {
+ [LPASS_PDC_HM_GDSCR] = &lpass_pdc_hm_gdsc,
+ [LPASS_AUDIO_HM_GDSCR] = &lpass_audio_hm_gdsc,
+};
+
+static struct regmap_config lpass_core_cc_sc7180_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .fast_io = true,
+};
+
+static const struct qcom_cc_desc lpass_core_hm_sc7180_desc = {
+ .config = &lpass_core_cc_sc7180_regmap_config,
+ .gdscs = lpass_core_hm_sc7180_gdscs,
+ .num_gdscs = ARRAY_SIZE(lpass_core_hm_sc7180_gdscs),
+};
+
+static const struct qcom_cc_desc lpass_core_cc_sc7180_desc = {
+ .config = &lpass_core_cc_sc7180_regmap_config,
+ .clks = lpass_core_cc_sc7180_clocks,
+ .num_clks = ARRAY_SIZE(lpass_core_cc_sc7180_clocks),
+};
+
+static const struct qcom_cc_desc lpass_audio_hm_sc7180_desc = {
+ .config = &lpass_core_cc_sc7180_regmap_config,
+ .gdscs = lpass_audio_hm_sc7180_gdscs,
+ .num_gdscs = ARRAY_SIZE(lpass_audio_hm_sc7180_gdscs),
+};
+
+
+static int lpass_core_cc_sc7180_probe(struct platform_device *pdev)
+{
+ const struct qcom_cc_desc *desc;
+ struct regmap *regmap;
+ int ret;
+
+ lpass_core_cc_sc7180_regmap_config.name = "lpass_audio_cc";
+ desc = &lpass_audio_hm_sc7180_desc;
+ ret = qcom_cc_probe_by_index(pdev, 1, desc);
+ if (ret)
+ return ret;
+
+ lpass_core_cc_sc7180_regmap_config.name = "lpass_core_cc";
+ regmap = qcom_cc_map(pdev, &lpass_core_cc_sc7180_desc);
+ if (IS_ERR(regmap))
+ return PTR_ERR(regmap);
+
+ /*
+ * Keep the CLK always-ON
+ * LPASS_AUDIO_CORE_SYSNOC_SWAY_CORE_CLK
+ */
+ regmap_update_bits(regmap, 0x24000, BIT(0), BIT(0));
+
+ /* PLL settings */
+ regmap_write(regmap, 0x1008, 0x20);
+ regmap_update_bits(regmap, 0x1014, BIT(0), BIT(0));
+
+ clk_fabia_pll_configure(&lpass_lpaaudio_dig_pll, regmap,
+ &lpass_lpaaudio_dig_pll_config);
+
+ return qcom_cc_really_probe(pdev, &lpass_core_cc_sc7180_desc, regmap);
+}
+
+static int lpass_hm_core_probe(struct platform_device *pdev)
+{
+ const struct qcom_cc_desc *desc;
+ int ret;
+
+ lpass_core_cc_sc7180_regmap_config.name = "lpass_hm_core";
+ desc = &lpass_core_hm_sc7180_desc;
+
+ return qcom_cc_probe_by_index(pdev, 0, desc);
+}
+
+static const struct of_device_id lpass_core_cc_sc7180_match_table[] = {
+ {
+ .compatible = "qcom,sc7180-lpasshm",
+ .data = lpass_hm_core_probe,
+ },
+ {
+ .compatible = "qcom,sc7180-lpasscorecc",
+ .data = lpass_core_cc_sc7180_probe,
+ },
+ { }
+};
+MODULE_DEVICE_TABLE(of, lpass_core_cc_sc7180_match_table);
+
+static int lpass_core_sc7180_probe(struct platform_device *pdev)
+{
+ int (*clk_probe)(struct platform_device *p);
+ int ret;
+
+ pm_runtime_enable(&pdev->dev);
+ ret = pm_clk_create(&pdev->dev);
+ if (ret)
+ return ret;
+
+ ret = pm_clk_add(&pdev->dev, "gcc_lpass_sway");
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to acquire iface clock\n");
+ goto disable_pm_runtime;
+ }
+
+ clk_probe = of_device_get_match_data(&pdev->dev);
+ if (!clk_probe)
+ return -EINVAL;
+
+ ret = clk_probe(pdev);
+ if (ret)
+ goto destroy_pm_clk;
+
+ return 0;
+
+destroy_pm_clk:
+ pm_clk_destroy(&pdev->dev);
+
+disable_pm_runtime:
+ pm_runtime_disable(&pdev->dev);
+
+ return ret;
+}
+
+static const struct dev_pm_ops lpass_core_cc_pm_ops = {
+ SET_RUNTIME_PM_OPS(pm_clk_suspend, pm_clk_resume, NULL)
+};
+
+static struct platform_driver lpass_core_cc_sc7180_driver = {
+ .probe = lpass_core_sc7180_probe,
+ .driver = {
+ .name = "lpass_core_cc-sc7180",
+ .of_match_table = lpass_core_cc_sc7180_match_table,
+ .pm = &lpass_core_cc_pm_ops,
+ },
+};
+
+static int __init lpass_core_cc_sc7180_init(void)
+{
+ return platform_driver_register(&lpass_core_cc_sc7180_driver);
+}
+subsys_initcall(lpass_core_cc_sc7180_init);
+
+static void __exit lpass_core_cc_sc7180_exit(void)
+{
+ platform_driver_unregister(&lpass_core_cc_sc7180_driver);
+}
+module_exit(lpass_core_cc_sc7180_exit);
+
+MODULE_DESCRIPTION("QTI LPASS_CORE_CC SC7180 Driver");
+MODULE_LICENSE("GPL v2");