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Message-Id: <1591809487-5588-5-git-send-email-tdas@codeaurora.org>
Date:   Wed, 10 Jun 2020 22:48:07 +0530
From:   Taniya Das <tdas@...eaurora.org>
To:     Stephen Boyd <sboyd@...nel.org>,
        Michael Turquette   <mturquette@...libre.com>
Cc:     David Brown <david.brown@...aro.org>,
        Rajendra Nayak <rnayak@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, linux-soc@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        Andy Gross <agross@...nel.org>, devicetree@...r.kernel.org,
        robh@...nel.org, robh+dt@...nel.org,
        Taniya Das <tdas@...eaurora.org>
Subject: [PATCH v3 4/4] clk: qcom: lpass: Add support for LPASS clock controller for SC7180

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@...eaurora.org>
---
 drivers/clk/qcom/Kconfig              |   9 +
 drivers/clk/qcom/Makefile             |   1 +
 drivers/clk/qcom/lpasscorecc-sc7180.c | 478 ++++++++++++++++++++++++++++++++++
 3 files changed, 488 insertions(+)
 create mode 100644 drivers/clk/qcom/lpasscorecc-sc7180.c

diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig
index cde6ca9..d92166a 100644
--- a/drivers/clk/qcom/Kconfig
+++ b/drivers/clk/qcom/Kconfig
@@ -280,6 +280,15 @@ 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 7ec8561..5668797 100644
--- a/drivers/clk/qcom/Makefile
+++ b/drivers/clk/qcom/Makefile
@@ -51,6 +51,7 @@ 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..fd8537c
--- /dev/null
+++ b/drivers/clk/qcom/lpasscorecc-sc7180.c
@@ -0,0 +1,478 @@
+// 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, "iface");
+	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");
--
Qualcomm INDIA, on behalf of Qualcomm Innovation Center, Inc.is a member
of the Code Aurora Forum, hosted by the  Linux Foundation.

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