clk: mediatek: add clock support for MT7622 SoC

Add all supported clocks exported from every susbystem found on MT7622 SoC
such as topckgen, apmixedsys, infracfg, pericfg , pciessys, ssusbsys,
ethsys and audsys.

Signed-off-by: Chen Zhong <chen.zhong@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

1 files changed, 156 insertions, 0 deletions

diff --git a/drivers/clk/mediatek/clk-mt7622-eth.c b/drivers/clk/mediatek/clk-mt7622-eth.c
new file mode 100644
index 000000000000..6328127bbb3c
--- /dev/null
+++ b/drivers/clk/mediatek/clk-mt7622-eth.c
@@ -0,0 +1,156 @@
+/*
+ * Copyright (c) 2017 MediaTek Inc.
+ * Author: Chen Zhong <chen.zhong@mediatek.com>
+ *	   Sean Wang <sean.wang@mediatek.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+
+#include "clk-mtk.h"
+#include "clk-gate.h"
+
+#include <dt-bindings/clock/mt7622-clk.h>
+
+#define GATE_ETH(_id, _name, _parent, _shift) {	\
+		.id = _id,				\
+		.name = _name,				\
+		.parent_name = _parent,			\
+		.regs = &eth_cg_regs,			\
+		.shift = _shift,			\
+		.ops = &mtk_clk_gate_ops_no_setclr_inv,	\
+	}
+
+static const struct mtk_gate_regs eth_cg_regs = {
+	.set_ofs = 0x30,
+	.clr_ofs = 0x30,
+	.sta_ofs = 0x30,
+};
+
+static const struct mtk_gate eth_clks[] = {
+	GATE_ETH(CLK_ETH_HSDMA_EN, "eth_hsdma_en", "eth_sel", 5),
+	GATE_ETH(CLK_ETH_ESW_EN, "eth_esw_en", "eth_500m", 6),
+	GATE_ETH(CLK_ETH_GP2_EN, "eth_gp2_en", "txclk_src_pre", 7),
+	GATE_ETH(CLK_ETH_GP1_EN, "eth_gp1_en", "txclk_src_pre", 8),
+	GATE_ETH(CLK_ETH_GP0_EN, "eth_gp0_en", "txclk_src_pre", 9),
+};
+
+static const struct mtk_gate_regs sgmii_cg_regs = {
+	.set_ofs = 0xE4,
+	.clr_ofs = 0xE4,
+	.sta_ofs = 0xE4,
+};
+
+#define GATE_SGMII(_id, _name, _parent, _shift) {	\
+		.id = _id,				\
+		.name = _name,				\
+		.parent_name = _parent,			\
+		.regs = &sgmii_cg_regs,			\
+		.shift = _shift,			\
+		.ops = &mtk_clk_gate_ops_no_setclr_inv,	\
+	}
+
+static const struct mtk_gate sgmii_clks[] = {
+	GATE_SGMII(CLK_SGMII_TX250M_EN, "sgmii_tx250m_en",
+		   "ssusb_tx250m", 2),
+	GATE_SGMII(CLK_SGMII_RX250M_EN, "sgmii_rx250m_en",
+		   "ssusb_eq_rx250m", 3),
+	GATE_SGMII(CLK_SGMII_CDR_REF, "sgmii_cdr_ref",
+		   "ssusb_cdr_ref", 4),
+	GATE_SGMII(CLK_SGMII_CDR_FB, "sgmii_cdr_fb",
+		   "ssusb_cdr_fb", 5),
+};
+
+static int clk_mt7622_ethsys_init(struct platform_device *pdev)
+{
+	struct clk_onecell_data *clk_data;
+	struct device_node *node = pdev->dev.of_node;
+	int r;
+
+	clk_data = mtk_alloc_clk_data(CLK_ETH_NR_CLK);
+
+	mtk_clk_register_gates(node, eth_clks, ARRAY_SIZE(eth_clks),
+			       clk_data);
+
+	r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
+	if (r)
+		dev_err(&pdev->dev,
+			"could not register clock provider: %s: %d\n",
+			pdev->name, r);
+
+	mtk_register_reset_controller(node, 1, 0x34);
+
+	return r;
+}
+
+static int clk_mt7622_sgmiisys_init(struct platform_device *pdev)
+{
+	struct clk_onecell_data *clk_data;
+	struct device_node *node = pdev->dev.of_node;
+	int r;
+
+	clk_data = mtk_alloc_clk_data(CLK_SGMII_NR_CLK);
+
+	mtk_clk_register_gates(node, sgmii_clks, ARRAY_SIZE(sgmii_clks),
+			       clk_data);
+
+	r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
+	if (r)
+		dev_err(&pdev->dev,
+			"could not register clock provider: %s: %d\n",
+			pdev->name, r);
+
+	return r;
+}
+
+static const struct of_device_id of_match_clk_mt7622_eth[] = {
+	{
+		.compatible = "mediatek,mt7622-ethsys",
+		.data = clk_mt7622_ethsys_init,
+	}, {
+		.compatible = "mediatek,mt7622-sgmiisys",
+		.data = clk_mt7622_sgmiisys_init,
+	}, {
+		/* sentinel */
+	}
+};
+
+static int clk_mt7622_eth_probe(struct platform_device *pdev)
+{
+	int (*clk_init)(struct platform_device *);
+	int r;
+
+	clk_init = of_device_get_match_data(&pdev->dev);
+	if (!clk_init)
+		return -EINVAL;
+
+	r = clk_init(pdev);
+	if (r)
+		dev_err(&pdev->dev,
+			"could not register clock provider: %s: %d\n",
+			pdev->name, r);
+
+	return r;
+}
+
+static struct platform_driver clk_mt7622_eth_drv = {
+	.probe = clk_mt7622_eth_probe,
+	.driver = {
+		.name = "clk-mt7622-eth",
+		.of_match_table = of_match_clk_mt7622_eth,
+	},
+};
+
+builtin_platform_driver(clk_mt7622_eth_drv);