clk/qcom: add driver for qcm2290 GCC

Add a clock driver for the QCM2290 SoC which is used in the QRB2210 RB1
board.

Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>

drivers/clk/qcom/Kconfig

@@ -31,6 +31,14 @@ config CLK_QCOM_IPQ4019
 	  on the Snapdragon IPQ4019 SoC. This driver supports the clocks
 	  and resets exposed by the GCC hardware block.
 
+config CLK_QCOM_QCM2290
+	bool "Qualcomm QCM2290 GCC"
+	select CLK_QCOM
+	help
+	  Say Y here to enable support for the Global Clock Controller
+	  on the Snapdragon QCM2290 SoC. This driver supports the clocks
+	  and resets exposed by the GCC hardware block.
+
 config CLK_QCOM_QCS404
 	bool "Qualcomm QCS404 GCC"
 	select CLK_QCOM

drivers/clk/qcom/Makefile

@@ -7,4 +7,5 @@ obj-$(CONFIG_CLK_QCOM_SDM845) += clock-sdm845.o
 obj-$(CONFIG_CLK_QCOM_APQ8016) += clock-apq8016.o
 obj-$(CONFIG_CLK_QCOM_APQ8096) += clock-apq8096.o
 obj-$(CONFIG_CLK_QCOM_IPQ4019) += clock-ipq4019.o
+obj-$(CONFIG_CLK_QCOM_QCM2290) += clock-qcm2290.o
 obj-$(CONFIG_CLK_QCOM_QCS404) += clock-qcs404.o

drivers/clk/qcom/clock-qcm2290.c

@@ -0,0 +1,192 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Clock drivers for Qualcomm qcm2290
+ *
+ * (C) Copyright 2024 Linaro Ltd.
+ */
+
+#include <clk-uclass.h>
+#include <dm.h>
+#include <linux/delay.h>
+#include <asm/io.h>
+#include <linux/bug.h>
+#include <linux/bitops.h>
+#include <dt-bindings/clock/qcom,gcc-qcm2290.h>
+
+#include "clock-qcom.h"
+
+#define QUPV3_WRAP0_S4_CMD_RCGR 0x1f608
+#define SDCC2_APPS_CLK_CMD_RCGR 0x1e00c
+
+static const struct freq_tbl ftbl_gcc_qupv3_wrap0_s0_clk_src[] = {
+	F(7372800, CFG_CLK_SRC_GPLL0_AUX2, 1, 384, 15625),
+	F(14745600, CFG_CLK_SRC_GPLL0_AUX2, 1, 768, 15625),
+	F(19200000, CFG_CLK_SRC_CXO, 1, 0, 0),
+	F(29491200, CFG_CLK_SRC_GPLL0_AUX2, 1, 1536, 15625),
+	F(32000000, CFG_CLK_SRC_GPLL0_AUX2, 1, 8, 75),
+	F(48000000, CFG_CLK_SRC_GPLL0_AUX2, 1, 4, 25),
+	F(64000000, CFG_CLK_SRC_GPLL0_AUX2, 1, 16, 75),
+	F(75000000, CFG_CLK_SRC_GPLL0_AUX2, 4, 0, 0),
+	F(80000000, CFG_CLK_SRC_GPLL0_AUX2, 1, 4, 15),
+	F(96000000, CFG_CLK_SRC_GPLL0_AUX2, 1, 8, 25),
+	F(100000000, CFG_CLK_SRC_GPLL0_AUX2, 3, 0, 0),
+	F(102400000, CFG_CLK_SRC_GPLL0_AUX2, 1, 128, 375),
+	F(112000000, CFG_CLK_SRC_GPLL0_AUX2, 1, 28, 75),
+	F(117964800, CFG_CLK_SRC_GPLL0_AUX2, 1, 6144, 15625),
+	F(120000000, CFG_CLK_SRC_GPLL0_AUX2, 2.5, 0, 0),
+	F(128000000, CFG_CLK_SRC_GPLL6, 3, 0, 0),
+	{}
+};
+
+static const struct freq_tbl ftbl_gcc_sdcc2_apps_clk_src[] = {
+	F(400000, CFG_CLK_SRC_CXO, 12, 1, 4),
+	F(19200000, CFG_CLK_SRC_CXO, 1, 0, 0),
+	F(25000000, CFG_CLK_SRC_GPLL0_AUX2, 12, 0, 0),
+	F(50000000, CFG_CLK_SRC_GPLL0_AUX2, 6, 0, 0),
+	F(100000000, CFG_CLK_SRC_GPLL0_AUX2, 3, 0, 0),
+	F(202000000, CFG_CLK_SRC_GPLL7, 4, 0, 0), // 6.5, 1, 4
+	{}
+};
+
+static const struct pll_vote_clk gpll7_clk = {
+	.status = 0x7000,
+	.status_bit = BIT(31),
+	.ena_vote = 0x79000,
+	.vote_bit = BIT(7),
+};
+
+static const struct gate_clk qcm2290_clks[] = {
+	GATE_CLK(GCC_AHB2PHY_USB_CLK, 0x1d008, 0x00000001),
+	GATE_CLK(GCC_CFG_NOC_USB3_PRIM_AXI_CLK, 0x1a084, 0x00000001),
+	GATE_CLK(GCC_QUPV3_WRAP0_CORE_2X_CLK, 0x7900c, 0x00000200),
+	GATE_CLK(GCC_QUPV3_WRAP0_CORE_CLK, 0x7900c, 0x00000100),
+	GATE_CLK(GCC_QUPV3_WRAP0_S0_CLK, 0x7900c, 0x00000400),
+	GATE_CLK(GCC_QUPV3_WRAP0_S1_CLK, 0x7900c, 0x00000800),
+	GATE_CLK(GCC_QUPV3_WRAP0_S2_CLK, 0x7900c, 0x00001000),
+	GATE_CLK(GCC_QUPV3_WRAP0_S3_CLK, 0x7900c, 0x00002000),
+	GATE_CLK(GCC_QUPV3_WRAP0_S4_CLK, 0x7900c, 0x00004000),
+	GATE_CLK(GCC_QUPV3_WRAP0_S5_CLK, 0x7900c, 0x00008000),
+	GATE_CLK(GCC_QUPV3_WRAP_0_M_AHB_CLK, 0x7900c, 0x00000040),
+	GATE_CLK(GCC_QUPV3_WRAP_0_S_AHB_CLK, 0x7900c, 0x00000080),
+	GATE_CLK(GCC_SDCC1_AHB_CLK, 0x38008, 0x00000001),
+	GATE_CLK(GCC_SDCC1_APPS_CLK, 0x38004, 0x00000001),
+	GATE_CLK(GCC_SDCC1_ICE_CORE_CLK, 0x3800c, 0x00000001),
+	GATE_CLK(GCC_SDCC2_AHB_CLK, 0x1e008, 0x00000001),
+	GATE_CLK(GCC_SDCC2_APPS_CLK, 0x1e004, 0x00000001),
+	GATE_CLK(GCC_SYS_NOC_CPUSS_AHB_CLK, 0x79004, 0x00000001),
+	GATE_CLK(GCC_SYS_NOC_USB3_PRIM_AXI_CLK, 0x1a080, 0x00000001),
+	GATE_CLK(GCC_USB30_PRIM_MASTER_CLK, 0x1a010, 0x00000001),
+	GATE_CLK(GCC_USB30_PRIM_MOCK_UTMI_CLK, 0x1a018, 0x00000001),
+	GATE_CLK(GCC_USB30_PRIM_SLEEP_CLK, 0x1a014, 0x00000001),
+	GATE_CLK(GCC_USB3_PRIM_CLKREF_CLK, 0x9f000, 0x00000001),
+	GATE_CLK(GCC_USB3_PRIM_PHY_COM_AUX_CLK, 0x1a054, 0x00000001),
+	GATE_CLK(GCC_USB3_PRIM_PHY_PIPE_CLK, 0x1a058, 0x00000001),
+};
+
+static ulong qcm2290_set_rate(struct clk *clk, ulong rate)
+{
+	struct msm_clk_priv *priv = dev_get_priv(clk->dev);
+	const struct freq_tbl *freq;
+
+	debug("%s: clk %s rate %lu\n", __func__, clk->dev->name, rate);
+
+	switch (clk->id) {
+	case GCC_QUPV3_WRAP0_S4_CLK: /*UART2*/
+		freq = qcom_find_freq(ftbl_gcc_qupv3_wrap0_s0_clk_src, rate);
+		clk_rcg_set_rate_mnd(priv->base, QUPV3_WRAP0_S4_CMD_RCGR,
+				     freq->pre_div, freq->m, freq->n, freq->src,
+				     16);
+		return 0;
+	case GCC_SDCC2_APPS_CLK:
+		/* Enable GPLL7 so we can point SDCC2_APPS_CLK_SRC RCG at it */
+		clk_enable_gpll0(priv->base, &gpll7_clk);
+		freq = qcom_find_freq(ftbl_gcc_sdcc2_apps_clk_src, rate);
+		WARN(freq->src != CFG_CLK_SRC_GPLL7,
+		     "SDCC2_APPS_CLK_SRC not set to GPLL7, requested rate %lu\n",
+		     rate);
+		clk_rcg_set_rate_mnd(priv->base, SDCC2_APPS_CLK_CMD_RCGR,
+				     freq->pre_div, freq->m, freq->n, freq->src,
+				     8);
+		return freq->freq;
+	case GCC_SDCC1_APPS_CLK:
+		/* The firmware turns this on for us and always sets it to this rate */
+		return 384000000;
+	default:
+		return 0;
+	}
+}
+
+static int qcm2290_enable(struct clk *clk)
+{
+	struct msm_clk_priv *priv = dev_get_priv(clk->dev);
+
+	if (priv->data->num_clks < clk->id) {
+		debug("%s: unknown clk id %lu\n", __func__, clk->id);
+		return 0;
+	}
+
+	debug("%s: clk %s\n", __func__, qcm2290_clks[clk->id].name);
+
+	switch (clk->id) {
+	case GCC_USB30_PRIM_MASTER_CLK:
+		qcom_gate_clk_en(priv, GCC_USB3_PRIM_PHY_COM_AUX_CLK);
+		qcom_gate_clk_en(priv, GCC_USB3_PRIM_CLKREF_CLK);
+		break;
+	}
+
+	qcom_gate_clk_en(priv, clk->id);
+
+	return 0;
+}
+
+static const struct qcom_reset_map qcm2290_gcc_resets[] = {
+	[GCC_CAMSS_OPE_BCR] = { 0x55000 },
+	[GCC_CAMSS_TFE_BCR] = { 0x52000 },
+	[GCC_CAMSS_TOP_BCR] = { 0x58000 },
+	[GCC_GPU_BCR] = { 0x36000 },
+	[GCC_MMSS_BCR] = { 0x17000 },
+	[GCC_PDM_BCR] = { 0x20000 },
+	[GCC_QUPV3_WRAPPER_0_BCR] = { 0x1f000 },
+	[GCC_QUSB2PHY_PRIM_BCR] = { 0x1c000 },
+	[GCC_SDCC1_BCR] = { 0x38000 },
+	[GCC_SDCC2_BCR] = { 0x1e000 },
+	[GCC_USB30_PRIM_BCR] = { 0x1a000 },
+	[GCC_USB3_PHY_PRIM_SP0_BCR] = { 0x1b000 },
+	[GCC_USB3PHY_PHY_PRIM_SP0_BCR] = { 0x1b008 },
+	[GCC_USB_PHY_CFG_AHB2PHY_BCR] = { 0x1d000 },
+	[GCC_VCODEC0_BCR] = { 0x58094 },
+	[GCC_VENUS_BCR] = { 0x58078 },
+	[GCC_VIDEO_INTERFACE_BCR] = { 0x6e000 },
+};
+
+static const struct qcom_power_map qcm2290_gdscs[] = {
+	[GCC_USB30_PRIM_GDSC] = { 0x1a004 },
+};
+
+static struct msm_clk_data qcm2290_gcc_data = {
+	.resets = qcm2290_gcc_resets,
+	.num_resets = ARRAY_SIZE(qcm2290_gcc_resets),
+	.clks = qcm2290_clks,
+	.num_clks = ARRAY_SIZE(qcm2290_clks),
+	.power_domains = qcm2290_gdscs,
+	.num_power_domains = ARRAY_SIZE(qcm2290_gdscs),
+
+	.enable = qcm2290_enable,
+	.set_rate = qcm2290_set_rate,
+};
+
+static const struct udevice_id gcc_qcm2290_of_match[] = {
+	{
+		.compatible = "qcom,gcc-qcm2290",
+		.data = (ulong)&qcm2290_gcc_data,
+	},
+	{}
+};
+
+U_BOOT_DRIVER(gcc_qcm2290) = {
+	.name = "gcc_qcm2290",
+	.id = UCLASS_NOP,
+	.of_match = gcc_qcm2290_of_match,
+	.bind = qcom_cc_bind,
+	.flags = DM_FLAG_PRE_RELOC,
+};

drivers/clk/qcom/clock-qcom.h

@@ -9,6 +9,9 @@
 
 #define CFG_CLK_SRC_CXO   (0 << 8)
 #define CFG_CLK_SRC_GPLL0 (1 << 8)
+#define CFG_CLK_SRC_GPLL0_AUX2 (2 << 8)
+#define CFG_CLK_SRC_GPLL6 (4 << 8)
+#define CFG_CLK_SRC_GPLL7 (3 << 8)
 #define CFG_CLK_SRC_GPLL0_EVEN (6 << 8)
 #define CFG_CLK_SRC_MASK  (7 << 8)