linux-kernel - [PATCH v2 13/15] clk: sunxi-ng: a523: add reset lines

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Message-ID: <20250214125359.5204-14-andre.przywara@arm.com>
Date: Fri, 14 Feb 2025 12:53:57 +0000
From: Andre Przywara <andre.przywara@....com>
To: Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Chen-Yu Tsai <wens@...e.org>,
	Jernej Skrabec <jernej.skrabec@...il.com>,
	Samuel Holland <samuel@...lland.org>
Cc: Philipp Zabel <p.zabel@...gutronix.de>,
	linux-clk@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-sunxi@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 13/15] clk: sunxi-ng: a523: add reset lines

Allwinner SoCs do not contain a separate reset controller, instead the
reset lines for the various devices are integrated into the "BGR" (Bus
Gate / Reset) registers, for each device group: one for all UARTs, one
for all SPI interfaces, and so on.
The Allwinner CCU driver also doubles as a reset provider, and since the
reset lines are indeed just single bits in those BGR register, we can
represent them easily in an array of structs, just containing the
register offset and the bit number.

Add the location of the reset bits for all devices in the A523/T527
SoCs, using the existing sunxi CCU infrastructure.

Signed-off-by: Andre Przywara <andre.przywara@....com>
---
 drivers/clk/sunxi-ng/ccu-sun55i-a523.c | 83 ++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)

diff --git a/drivers/clk/sunxi-ng/ccu-sun55i-a523.c b/drivers/clk/sunxi-ng/ccu-sun55i-a523.c
index fbed9b2b3b2f9..d57565f07a112 100644
--- a/drivers/clk/sunxi-ng/ccu-sun55i-a523.c
+++ b/drivers/clk/sunxi-ng/ccu-sun55i-a523.c
@@ -1475,11 +1475,94 @@ static struct clk_hw_onecell_data sun55i_a523_hw_clks = {
 	},
 };
 
+static struct ccu_reset_map sun55i_a523_ccu_resets[] = {
+	[RST_MBUS]		= { 0x540, BIT(30) },
+	[RST_BUS_NSI]		= { 0x54c, BIT(16) },
+	[RST_BUS_DE]		= { 0x60c, BIT(16) },
+	[RST_BUS_DI]		= { 0x62c, BIT(16) },
+	[RST_BUS_G2D]		= { 0x63c, BIT(16) },
+	[RST_BUS_SYS]		= { 0x64c, BIT(16) },
+	[RST_BUS_GPU]		= { 0x67c, BIT(16) },
+	[RST_BUS_CE]		= { 0x68c, BIT(16) },
+	[RST_BUS_SYS_CE]	= { 0x68c, BIT(17) },
+	[RST_BUS_VE]		= { 0x69c, BIT(16) },
+	[RST_BUS_DMA]		= { 0x70c, BIT(16) },
+	[RST_BUS_MSGBOX]	= { 0x71c, BIT(16) },
+	[RST_BUS_SPINLOCK]	= { 0x72c, BIT(16) },
+	[RST_BUS_CPUXTIMER]	= { 0x74c, BIT(16) },
+	[RST_BUS_DBG]		= { 0x78c, BIT(16) },
+	[RST_BUS_PWM0]		= { 0x7ac, BIT(16) },
+	[RST_BUS_PWM1]		= { 0x7ac, BIT(17) },
+	[RST_BUS_DRAM]		= { 0x80c, BIT(16) },
+	[RST_BUS_NAND]		= { 0x82c, BIT(16) },
+	[RST_BUS_MMC0]		= { 0x84c, BIT(16) },
+	[RST_BUS_MMC1]		= { 0x84c, BIT(17) },
+	[RST_BUS_MMC2]		= { 0x84c, BIT(18) },
+	[RST_BUS_SYSDAP]	= { 0x88c, BIT(16) },
+	[RST_BUS_UART0]		= { 0x90c, BIT(16) },
+	[RST_BUS_UART1]		= { 0x90c, BIT(17) },
+	[RST_BUS_UART2]		= { 0x90c, BIT(18) },
+	[RST_BUS_UART3]		= { 0x90c, BIT(19) },
+	[RST_BUS_UART4]		= { 0x90c, BIT(20) },
+	[RST_BUS_UART5]		= { 0x90c, BIT(21) },
+	[RST_BUS_UART6]		= { 0x90c, BIT(22) },
+	[RST_BUS_UART7]		= { 0x90c, BIT(23) },
+	[RST_BUS_I2C0]		= { 0x91c, BIT(16) },
+	[RST_BUS_I2C1]		= { 0x91c, BIT(17) },
+	[RST_BUS_I2C2]		= { 0x91c, BIT(18) },
+	[RST_BUS_I2C3]		= { 0x91c, BIT(19) },
+	[RST_BUS_I2C4]		= { 0x91c, BIT(20) },
+	[RST_BUS_I2C5]		= { 0x91c, BIT(21) },
+	[RST_BUS_CAN]		= { 0x92c, BIT(16) },
+	[RST_BUS_SPI0]		= { 0x96c, BIT(16) },
+	[RST_BUS_SPI1]		= { 0x96c, BIT(17) },
+	[RST_BUS_SPI2]		= { 0x96c, BIT(18) },
+	[RST_BUS_SPIFC]		= { 0x96c, BIT(19) },
+	[RST_BUS_EMAC0]		= { 0x97c, BIT(16) },
+	[RST_BUS_EMAC1]		= { 0x98c, BIT(16) | BIT(17) },	/* GMAC1-AXI */
+	[RST_BUS_IR_RX]		= { 0x99c, BIT(16) },
+	[RST_BUS_IR_TX]		= { 0x9cc, BIT(16) },
+	[RST_BUS_GPADC0]	= { 0x9ec, BIT(16) },
+	[RST_BUS_GPADC1]	= { 0x9ec, BIT(17) },
+	[RST_BUS_THS]		= { 0x9fc, BIT(16) },
+	[RST_USB_PHY0]		= { 0xa70, BIT(30) },
+	[RST_USB_PHY1]		= { 0xa74, BIT(30) },
+	[RST_BUS_OHCI0]		= { 0xa8c, BIT(16) },
+	[RST_BUS_OHCI1]		= { 0xa8c, BIT(17) },
+	[RST_BUS_EHCI0]		= { 0xa8c, BIT(20) },
+	[RST_BUS_EHCI1]		= { 0xa8c, BIT(21) },
+	[RST_BUS_OTG]		= { 0xa8c, BIT(24) },
+	[RST_BUS_3]		= { 0xa8c, BIT(25) },	/* BSP + register */
+	[RST_BUS_LRADC]		= { 0xa9c, BIT(16) },
+	[RST_BUS_PCIE_USB3]	= { 0xaac, BIT(16) },
+	[RST_BUS_DPSS_TOP]	= { 0xabc, BIT(16) },
+	[RST_BUS_HDMI_MAIN]	= { 0xb1c, BIT(16) },
+	[RST_BUS_HDMI_SUB]	= { 0xb1c, BIT(17) },
+	[RST_BUS_MIPI_DSI0]	= { 0xb4c, BIT(16) },
+	[RST_BUS_MIPI_DSI1]	= { 0xb4c, BIT(17) },
+	[RST_BUS_TCON_LCD0]	= { 0xb7c, BIT(16) },
+	[RST_BUS_TCON_LCD1]	= { 0xb7c, BIT(17) },
+	[RST_BUS_TCON_LCD2]	= { 0xb7c, BIT(18) },
+	[RST_BUS_TCON_TV0]	= { 0xb9c, BIT(16) },
+	[RST_BUS_TCON_TV1]	= { 0xb9c, BIT(17) },
+	[RST_BUS_LVDS0]		= { 0xbac, BIT(16) },
+	[RST_BUS_LVDS1]		= { 0xbac, BIT(17) },
+	[RST_BUS_EDP]		= { 0xbbc, BIT(16) },
+	[RST_BUS_VIDEO_OUT0]	= { 0xbcc, BIT(16) },
+	[RST_BUS_VIDEO_OUT1]	= { 0xbcc, BIT(17) },
+	[RST_BUS_LEDC]		= { 0xbfc, BIT(16) },
+	[RST_BUS_CSI]		= { 0xc1c, BIT(16) },
+	[RST_BUS_ISP]		= { 0xc2c, BIT(16) },	/* BSP + register */
+};
+
 static const struct sunxi_ccu_desc sun55i_a523_ccu_desc = {
 	.ccu_clks	= sun55i_a523_ccu_clks,
 	.num_ccu_clks	= ARRAY_SIZE(sun55i_a523_ccu_clks),
 
 	.hw_clks	= &sun55i_a523_hw_clks,
+
+	.resets		= sun55i_a523_ccu_resets,
+	.num_resets	= ARRAY_SIZE(sun55i_a523_ccu_resets),
 };
 
 static const u32 pll_regs[] = {
-- 
2.46.3