clk: mediatek: Add MediaTek Helio X10 MT6795 clock drivers

Add the clock drivers for the entire clock tree of MediaTek Helio X10
MT6795, including system clocks (apmixedsys, infracfg, pericfg, topckgen)
and multimedia clocks (mmsys, mfg, vdecsys, vencsys).

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Reviewed-by: Miles Chen <miles.chen@mediatek.com>
Link: https://lore.kernel.org/r/20220921091455.41327-9-angelogioacchino.delregno@collabora.com
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>

1 files changed, 160 insertions, 0 deletions

diff --git a/drivers/clk/mediatek/clk-mt6795-pericfg.c b/drivers/clk/mediatek/clk-mt6795-pericfg.c
new file mode 100644
index 000000000000..cb28d35dad59
--- /dev/null
+++ b/drivers/clk/mediatek/clk-mt6795-pericfg.c
@@ -0,0 +1,160 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2022 Collabora Ltd.
+ * Author: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
+ */
+
+#include <dt-bindings/clock/mediatek,mt6795-clk.h>
+#include <dt-bindings/reset/mediatek,mt6795-resets.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include "clk-gate.h"
+#include "clk-mtk.h"
+#include "reset.h"
+
+#define GATE_PERI(_id, _name, _parent, _shift)			\
+		GATE_MTK(_id, _name, _parent, &peri_cg_regs,	\
+			 _shift, &mtk_clk_gate_ops_setclr)
+
+static DEFINE_SPINLOCK(mt6795_peri_clk_lock);
+
+static const struct mtk_gate_regs peri_cg_regs = {
+	.set_ofs = 0x0008,
+	.clr_ofs = 0x0010,
+	.sta_ofs = 0x0018,
+};
+
+static const char * const uart_ck_sel_parents[] = {
+	"clk26m",
+	"uart_sel",
+};
+
+static const struct mtk_composite peri_clks[] = {
+	MUX(CLK_PERI_UART0_SEL, "uart0_ck_sel", uart_ck_sel_parents, 0x40c, 0, 1),
+	MUX(CLK_PERI_UART1_SEL, "uart1_ck_sel", uart_ck_sel_parents, 0x40c, 1, 1),
+	MUX(CLK_PERI_UART2_SEL, "uart2_ck_sel", uart_ck_sel_parents, 0x40c, 2, 1),
+	MUX(CLK_PERI_UART3_SEL, "uart3_ck_sel", uart_ck_sel_parents, 0x40c, 3, 1),
+};
+
+static const struct mtk_gate peri_gates[] = {
+	GATE_PERI(CLK_PERI_NFI, "peri_nfi", "axi_sel", 0),
+	GATE_PERI(CLK_PERI_THERM, "peri_therm", "axi_sel", 1),
+	GATE_PERI(CLK_PERI_PWM1, "peri_pwm1", "axi_sel", 2),
+	GATE_PERI(CLK_PERI_PWM2, "peri_pwm2", "axi_sel", 3),
+	GATE_PERI(CLK_PERI_PWM3, "peri_pwm3", "axi_sel", 4),
+	GATE_PERI(CLK_PERI_PWM4, "peri_pwm4", "axi_sel", 5),
+	GATE_PERI(CLK_PERI_PWM5, "peri_pwm5", "axi_sel", 6),
+	GATE_PERI(CLK_PERI_PWM6, "peri_pwm6", "axi_sel", 7),
+	GATE_PERI(CLK_PERI_PWM7, "peri_pwm7", "axi_sel", 8),
+	GATE_PERI(CLK_PERI_PWM, "peri_pwm", "axi_sel", 9),
+	GATE_PERI(CLK_PERI_USB0, "peri_usb0", "usb30_sel", 10),
+	GATE_PERI(CLK_PERI_USB1, "peri_usb1", "usb20_sel", 11),
+	GATE_PERI(CLK_PERI_AP_DMA, "peri_ap_dma", "axi_sel", 12),
+	GATE_PERI(CLK_PERI_MSDC30_0, "peri_msdc30_0", "msdc50_0_sel", 13),
+	GATE_PERI(CLK_PERI_MSDC30_1, "peri_msdc30_1", "msdc30_1_sel", 14),
+	GATE_PERI(CLK_PERI_MSDC30_2, "peri_msdc30_2", "msdc30_2_sel", 15),
+	GATE_PERI(CLK_PERI_MSDC30_3, "peri_msdc30_3", "msdc30_3_sel", 16),
+	GATE_PERI(CLK_PERI_NLI_ARB, "peri_nli_arb", "axi_sel", 17),
+	GATE_PERI(CLK_PERI_IRDA, "peri_irda", "irda_sel", 18),
+	GATE_PERI(CLK_PERI_UART0, "peri_uart0", "axi_sel", 19),
+	GATE_PERI(CLK_PERI_UART1, "peri_uart1", "axi_sel", 20),
+	GATE_PERI(CLK_PERI_UART2, "peri_uart2", "axi_sel", 21),
+	GATE_PERI(CLK_PERI_UART3, "peri_uart3", "axi_sel", 22),
+	GATE_PERI(CLK_PERI_I2C0, "peri_i2c0", "axi_sel", 23),
+	GATE_PERI(CLK_PERI_I2C1, "peri_i2c1", "axi_sel", 24),
+	GATE_PERI(CLK_PERI_I2C2, "peri_i2c2", "axi_sel", 25),
+	GATE_PERI(CLK_PERI_I2C3, "peri_i2c3", "axi_sel", 26),
+	GATE_PERI(CLK_PERI_I2C4, "peri_i2c4", "axi_sel", 27),
+	GATE_PERI(CLK_PERI_AUXADC, "peri_auxadc", "clk26m", 28),
+	GATE_PERI(CLK_PERI_SPI0, "peri_spi0", "spi_sel", 29),
+};
+
+static u16 peri_rst_ofs[] = { 0x0 };
+
+static u16 peri_idx_map[] = {
+	[MT6795_PERI_NFI_SW_RST]   = 14,
+	[MT6795_PERI_THERM_SW_RST] = 16,
+	[MT6795_PERI_MSDC1_SW_RST] = 20,
+};
+
+static const struct mtk_clk_rst_desc clk_rst_desc = {
+	.version = MTK_RST_SIMPLE,
+	.rst_bank_ofs = peri_rst_ofs,
+	.rst_bank_nr = ARRAY_SIZE(peri_rst_ofs),
+	.rst_idx_map = peri_idx_map,
+	.rst_idx_map_nr = ARRAY_SIZE(peri_idx_map),
+};
+
+static const struct of_device_id of_match_clk_mt6795_pericfg[] = {
+	{ .compatible = "mediatek,mt6795-pericfg" },
+	{ /* sentinel */ }
+};
+
+static int clk_mt6795_pericfg_probe(struct platform_device *pdev)
+{
+	struct clk_hw_onecell_data *clk_data;
+	struct device_node *node = pdev->dev.of_node;
+	void __iomem *base;
+	int ret;
+
+	base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(base))
+		return PTR_ERR(base);
+
+	clk_data = mtk_alloc_clk_data(CLK_PERI_NR_CLK);
+	if (!clk_data)
+		return -ENOMEM;
+
+	ret = mtk_register_reset_controller_with_dev(&pdev->dev, &clk_rst_desc);
+	if (ret)
+		goto free_clk_data;
+
+	ret = mtk_clk_register_gates(node, peri_gates, ARRAY_SIZE(peri_gates), clk_data);
+	if (ret)
+		goto free_clk_data;
+
+	ret = mtk_clk_register_composites(peri_clks, ARRAY_SIZE(peri_clks), base,
+					  &mt6795_peri_clk_lock, clk_data);
+	if (ret)
+		goto unregister_gates;
+
+	ret = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
+	if (ret)
+		goto unregister_composites;
+
+	return 0;
+
+unregister_composites:
+	mtk_clk_unregister_composites(peri_clks, ARRAY_SIZE(peri_clks), clk_data);
+unregister_gates:
+	mtk_clk_unregister_gates(peri_gates, ARRAY_SIZE(peri_gates), clk_data);
+free_clk_data:
+	mtk_free_clk_data(clk_data);
+	return ret;
+}
+
+static int clk_mt6795_pericfg_remove(struct platform_device *pdev)
+{
+	struct device_node *node = pdev->dev.of_node;
+	struct clk_hw_onecell_data *clk_data = platform_get_drvdata(pdev);
+
+	of_clk_del_provider(node);
+	mtk_clk_unregister_composites(peri_clks, ARRAY_SIZE(peri_clks), clk_data);
+	mtk_clk_unregister_gates(peri_gates, ARRAY_SIZE(peri_gates), clk_data);
+	mtk_free_clk_data(clk_data);
+
+	return 0;
+}
+
+static struct platform_driver clk_mt6795_pericfg_drv = {
+	.driver = {
+		.name = "clk-mt6795-pericfg",
+		.of_match_table = of_match_clk_mt6795_pericfg,
+	},
+	.probe = clk_mt6795_pericfg_probe,
+	.remove = clk_mt6795_pericfg_remove,
+};
+module_platform_driver(clk_mt6795_pericfg_drv);
+
+MODULE_DESCRIPTION("MediaTek MT6795 pericfg clocks driver");
+MODULE_LICENSE("GPL");