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authorChen-Yu Tsai <wens@csie.org>2017-01-28 20:22:36 +0800
committerMaxime Ripard <maxime.ripard@free-electrons.com>2017-01-30 08:38:30 +0100
commit783ab76ae553abc23f80ef7511052d055697531b (patch)
tree739dab1483f6990a791043dd6b06392082f01276 /drivers/clk
parent439b65c4bb66564e46a8df38c06863ee7cecb4e4 (diff)
clk: sunxi-ng: Add A80 Display Engine CCU
With the A80 SoC, Allwinner grouped and moved some subsystem specific clock controls to a separate address space, and possibly separate hardware block. One such subsystem is the display engine. The main clock control unit now only has 1 set of bus gate, dram gate, module clock, and reset control for the entire display subsystem. These feed into a secondary clock control unit, which has controls for each individual module of the display pipeline. This block is not documented in the user manual. Allwinner's kernel was used as the reference. Add support for the display engine clock controls found on the A80. Signed-off-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Diffstat (limited to 'drivers/clk')
-rw-r--r--drivers/clk/sunxi-ng/Makefile1
-rw-r--r--drivers/clk/sunxi-ng/ccu-sun9i-a80-de.c283
-rw-r--r--drivers/clk/sunxi-ng/ccu-sun9i-a80-de.h33
3 files changed, 317 insertions, 0 deletions
diff --git a/drivers/clk/sunxi-ng/Makefile b/drivers/clk/sunxi-ng/Makefile
index 8f37ef7fb67d..6feaac0c5600 100644
--- a/drivers/clk/sunxi-ng/Makefile
+++ b/drivers/clk/sunxi-ng/Makefile
@@ -26,4 +26,5 @@ obj-$(CONFIG_SUN8I_A33_CCU) += ccu-sun8i-a33.o
obj-$(CONFIG_SUN8I_H3_CCU) += ccu-sun8i-h3.o
obj-$(CONFIG_SUN8I_V3S_CCU) += ccu-sun8i-v3s.o
obj-$(CONFIG_SUN9I_A80_CCU) += ccu-sun9i-a80.o
+obj-$(CONFIG_SUN9I_A80_CCU) += ccu-sun9i-a80-de.o
obj-$(CONFIG_SUN9I_A80_CCU) += ccu-sun9i-a80-usb.o
diff --git a/drivers/clk/sunxi-ng/ccu-sun9i-a80-de.c b/drivers/clk/sunxi-ng/ccu-sun9i-a80-de.c
new file mode 100644
index 000000000000..3fc27db0a49a
--- /dev/null
+++ b/drivers/clk/sunxi-ng/ccu-sun9i-a80-de.c
@@ -0,0 +1,283 @@
+/*
+ * Copyright (c) 2016 Chen-Yu Tsai. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.h>
+#include <linux/clk-provider.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/reset.h>
+
+#include "ccu_common.h"
+#include "ccu_div.h"
+#include "ccu_gate.h"
+#include "ccu_reset.h"
+
+#include "ccu-sun9i-a80-de.h"
+
+static SUNXI_CCU_GATE(fe0_clk, "fe0", "fe0-div",
+ 0x00, BIT(0), 0);
+static SUNXI_CCU_GATE(fe1_clk, "fe1", "fe1-div",
+ 0x00, BIT(1), 0);
+static SUNXI_CCU_GATE(fe2_clk, "fe2", "fe2-div",
+ 0x00, BIT(2), 0);
+static SUNXI_CCU_GATE(iep_deu0_clk, "iep-deu0", "de",
+ 0x00, BIT(4), 0);
+static SUNXI_CCU_GATE(iep_deu1_clk, "iep-deu1", "de",
+ 0x00, BIT(5), 0);
+static SUNXI_CCU_GATE(be0_clk, "be0", "be0-div",
+ 0x00, BIT(8), 0);
+static SUNXI_CCU_GATE(be1_clk, "be1", "be1-div",
+ 0x00, BIT(9), 0);
+static SUNXI_CCU_GATE(be2_clk, "be2", "be2-div",
+ 0x00, BIT(10), 0);
+static SUNXI_CCU_GATE(iep_drc0_clk, "iep-drc0", "de",
+ 0x00, BIT(12), 0);
+static SUNXI_CCU_GATE(iep_drc1_clk, "iep-drc1", "de",
+ 0x00, BIT(13), 0);
+static SUNXI_CCU_GATE(merge_clk, "merge", "de",
+ 0x00, BIT(20), 0);
+
+static SUNXI_CCU_GATE(dram_fe0_clk, "dram-fe0", "sdram",
+ 0x04, BIT(0), 0);
+static SUNXI_CCU_GATE(dram_fe1_clk, "dram-fe1", "sdram",
+ 0x04, BIT(1), 0);
+static SUNXI_CCU_GATE(dram_fe2_clk, "dram-fe2", "sdram",
+ 0x04, BIT(2), 0);
+static SUNXI_CCU_GATE(dram_deu0_clk, "dram-deu0", "sdram",
+ 0x04, BIT(4), 0);
+static SUNXI_CCU_GATE(dram_deu1_clk, "dram-deu1", "sdram",
+ 0x04, BIT(5), 0);
+static SUNXI_CCU_GATE(dram_be0_clk, "dram-be0", "sdram",
+ 0x04, BIT(8), 0);
+static SUNXI_CCU_GATE(dram_be1_clk, "dram-be1", "sdram",
+ 0x04, BIT(9), 0);
+static SUNXI_CCU_GATE(dram_be2_clk, "dram-be2", "sdram",
+ 0x04, BIT(10), 0);
+static SUNXI_CCU_GATE(dram_drc0_clk, "dram-drc0", "sdram",
+ 0x04, BIT(12), 0);
+static SUNXI_CCU_GATE(dram_drc1_clk, "dram-drc1", "sdram",
+ 0x04, BIT(13), 0);
+
+static SUNXI_CCU_GATE(bus_fe0_clk, "bus-fe0", "bus-de",
+ 0x08, BIT(0), 0);
+static SUNXI_CCU_GATE(bus_fe1_clk, "bus-fe1", "bus-de",
+ 0x08, BIT(1), 0);
+static SUNXI_CCU_GATE(bus_fe2_clk, "bus-fe2", "bus-de",
+ 0x08, BIT(2), 0);
+static SUNXI_CCU_GATE(bus_deu0_clk, "bus-deu0", "bus-de",
+ 0x08, BIT(4), 0);
+static SUNXI_CCU_GATE(bus_deu1_clk, "bus-deu1", "bus-de",
+ 0x08, BIT(5), 0);
+static SUNXI_CCU_GATE(bus_be0_clk, "bus-be0", "bus-de",
+ 0x08, BIT(8), 0);
+static SUNXI_CCU_GATE(bus_be1_clk, "bus-be1", "bus-de",
+ 0x08, BIT(9), 0);
+static SUNXI_CCU_GATE(bus_be2_clk, "bus-be2", "bus-de",
+ 0x08, BIT(10), 0);
+static SUNXI_CCU_GATE(bus_drc0_clk, "bus-drc0", "bus-de",
+ 0x08, BIT(12), 0);
+static SUNXI_CCU_GATE(bus_drc1_clk, "bus-drc1", "bus-de",
+ 0x08, BIT(13), 0);
+
+static SUNXI_CCU_M(fe0_div_clk, "fe0-div", "de", 0x20, 0, 4, 0);
+static SUNXI_CCU_M(fe1_div_clk, "fe1-div", "de", 0x20, 4, 4, 0);
+static SUNXI_CCU_M(fe2_div_clk, "fe2-div", "de", 0x20, 8, 4, 0);
+static SUNXI_CCU_M(be0_div_clk, "be0-div", "de", 0x20, 16, 4, 0);
+static SUNXI_CCU_M(be1_div_clk, "be1-div", "de", 0x20, 20, 4, 0);
+static SUNXI_CCU_M(be2_div_clk, "be2-div", "de", 0x20, 24, 4, 0);
+
+static struct ccu_common *sun9i_a80_de_clks[] = {
+ &fe0_clk.common,
+ &fe1_clk.common,
+ &fe2_clk.common,
+ &iep_deu0_clk.common,
+ &iep_deu1_clk.common,
+ &be0_clk.common,
+ &be1_clk.common,
+ &be2_clk.common,
+ &iep_drc0_clk.common,
+ &iep_drc1_clk.common,
+ &merge_clk.common,
+
+ &dram_fe0_clk.common,
+ &dram_fe1_clk.common,
+ &dram_fe2_clk.common,
+ &dram_deu0_clk.common,
+ &dram_deu1_clk.common,
+ &dram_be0_clk.common,
+ &dram_be1_clk.common,
+ &dram_be2_clk.common,
+ &dram_drc0_clk.common,
+ &dram_drc1_clk.common,
+
+ &bus_fe0_clk.common,
+ &bus_fe1_clk.common,
+ &bus_fe2_clk.common,
+ &bus_deu0_clk.common,
+ &bus_deu1_clk.common,
+ &bus_be0_clk.common,
+ &bus_be1_clk.common,
+ &bus_be2_clk.common,
+ &bus_drc0_clk.common,
+ &bus_drc1_clk.common,
+
+ &fe0_div_clk.common,
+ &fe1_div_clk.common,
+ &fe2_div_clk.common,
+ &be0_div_clk.common,
+ &be1_div_clk.common,
+ &be2_div_clk.common,
+};
+
+static struct clk_hw_onecell_data sun9i_a80_de_hw_clks = {
+ .hws = {
+ [CLK_FE0] = &fe0_clk.common.hw,
+ [CLK_FE1] = &fe1_clk.common.hw,
+ [CLK_FE2] = &fe2_clk.common.hw,
+ [CLK_IEP_DEU0] = &iep_deu0_clk.common.hw,
+ [CLK_IEP_DEU1] = &iep_deu1_clk.common.hw,
+ [CLK_BE0] = &be0_clk.common.hw,
+ [CLK_BE1] = &be1_clk.common.hw,
+ [CLK_BE2] = &be2_clk.common.hw,
+ [CLK_IEP_DRC0] = &iep_drc0_clk.common.hw,
+ [CLK_IEP_DRC1] = &iep_drc1_clk.common.hw,
+ [CLK_MERGE] = &merge_clk.common.hw,
+
+ [CLK_DRAM_FE0] = &dram_fe0_clk.common.hw,
+ [CLK_DRAM_FE1] = &dram_fe1_clk.common.hw,
+ [CLK_DRAM_FE2] = &dram_fe2_clk.common.hw,
+ [CLK_DRAM_DEU0] = &dram_deu0_clk.common.hw,
+ [CLK_DRAM_DEU1] = &dram_deu1_clk.common.hw,
+ [CLK_DRAM_BE0] = &dram_be0_clk.common.hw,
+ [CLK_DRAM_BE1] = &dram_be1_clk.common.hw,
+ [CLK_DRAM_BE2] = &dram_be2_clk.common.hw,
+ [CLK_DRAM_DRC0] = &dram_drc0_clk.common.hw,
+ [CLK_DRAM_DRC1] = &dram_drc1_clk.common.hw,
+
+ [CLK_BUS_FE0] = &bus_fe0_clk.common.hw,
+ [CLK_BUS_FE1] = &bus_fe1_clk.common.hw,
+ [CLK_BUS_FE2] = &bus_fe2_clk.common.hw,
+ [CLK_BUS_DEU0] = &bus_deu0_clk.common.hw,
+ [CLK_BUS_DEU1] = &bus_deu1_clk.common.hw,
+ [CLK_BUS_BE0] = &bus_be0_clk.common.hw,
+ [CLK_BUS_BE1] = &bus_be1_clk.common.hw,
+ [CLK_BUS_BE2] = &bus_be2_clk.common.hw,
+ [CLK_BUS_DRC0] = &bus_drc0_clk.common.hw,
+ [CLK_BUS_DRC1] = &bus_drc1_clk.common.hw,
+
+ [CLK_FE0_DIV] = &fe0_div_clk.common.hw,
+ [CLK_FE1_DIV] = &fe1_div_clk.common.hw,
+ [CLK_FE2_DIV] = &fe2_div_clk.common.hw,
+ [CLK_BE0_DIV] = &be0_div_clk.common.hw,
+ [CLK_BE1_DIV] = &be1_div_clk.common.hw,
+ [CLK_BE2_DIV] = &be2_div_clk.common.hw,
+ },
+ .num = CLK_NUMBER,
+};
+
+static struct ccu_reset_map sun9i_a80_de_resets[] = {
+ [RST_FE0] = { 0x0c, BIT(0) },
+ [RST_FE1] = { 0x0c, BIT(1) },
+ [RST_FE2] = { 0x0c, BIT(2) },
+ [RST_DEU0] = { 0x0c, BIT(4) },
+ [RST_DEU1] = { 0x0c, BIT(5) },
+ [RST_BE0] = { 0x0c, BIT(8) },
+ [RST_BE1] = { 0x0c, BIT(9) },
+ [RST_BE2] = { 0x0c, BIT(10) },
+ [RST_DRC0] = { 0x0c, BIT(12) },
+ [RST_DRC1] = { 0x0c, BIT(13) },
+ [RST_MERGE] = { 0x0c, BIT(20) },
+};
+
+static const struct sunxi_ccu_desc sun9i_a80_de_clk_desc = {
+ .ccu_clks = sun9i_a80_de_clks,
+ .num_ccu_clks = ARRAY_SIZE(sun9i_a80_de_clks),
+
+ .hw_clks = &sun9i_a80_de_hw_clks,
+
+ .resets = sun9i_a80_de_resets,
+ .num_resets = ARRAY_SIZE(sun9i_a80_de_resets),
+};
+
+static int sun9i_a80_de_clk_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+ struct clk *bus_clk;
+ struct reset_control *rstc;
+ void __iomem *reg;
+ int ret;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ reg = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(reg))
+ return PTR_ERR(reg);
+
+ bus_clk = devm_clk_get(&pdev->dev, "bus");
+ if (IS_ERR(bus_clk)) {
+ ret = PTR_ERR(bus_clk);
+ if (ret != -EPROBE_DEFER)
+ dev_err(&pdev->dev, "Couldn't get bus clk: %d\n", ret);
+ return ret;
+ }
+
+ rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);
+ if (IS_ERR(rstc)) {
+ ret = PTR_ERR(bus_clk);
+ if (ret != -EPROBE_DEFER)
+ dev_err(&pdev->dev,
+ "Couldn't get reset control: %d\n", ret);
+ return ret;
+ }
+
+ /* The bus clock needs to be enabled for us to access the registers */
+ ret = clk_prepare_enable(bus_clk);
+ if (ret) {
+ dev_err(&pdev->dev, "Couldn't enable bus clk: %d\n", ret);
+ return ret;
+ }
+
+ /* The reset control needs to be asserted for the controls to work */
+ ret = reset_control_deassert(rstc);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "Couldn't deassert reset control: %d\n", ret);
+ goto err_disable_clk;
+ }
+
+ ret = sunxi_ccu_probe(pdev->dev.of_node, reg,
+ &sun9i_a80_de_clk_desc);
+ if (ret)
+ goto err_assert_reset;
+
+ return 0;
+
+err_assert_reset:
+ reset_control_assert(rstc);
+err_disable_clk:
+ clk_disable_unprepare(bus_clk);
+ return ret;
+}
+
+static const struct of_device_id sun9i_a80_de_clk_ids[] = {
+ { .compatible = "allwinner,sun9i-a80-de-clks" },
+ { }
+};
+
+static struct platform_driver sun9i_a80_de_clk_driver = {
+ .probe = sun9i_a80_de_clk_probe,
+ .driver = {
+ .name = "sun9i-a80-de-clks",
+ .of_match_table = sun9i_a80_de_clk_ids,
+ },
+};
+builtin_platform_driver(sun9i_a80_de_clk_driver);
diff --git a/drivers/clk/sunxi-ng/ccu-sun9i-a80-de.h b/drivers/clk/sunxi-ng/ccu-sun9i-a80-de.h
new file mode 100644
index 000000000000..a4769041e40f
--- /dev/null
+++ b/drivers/clk/sunxi-ng/ccu-sun9i-a80-de.h
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2016 Chen-Yu Tsai
+ *
+ * Chen-Yu Tsai <wens@csie.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ */
+
+#ifndef _CCU_SUN9I_A80_DE_H_
+#define _CCU_SUN9I_A80_DE_H_
+
+#include <dt-bindings/clock/sun9i-a80-de.h>
+#include <dt-bindings/reset/sun9i-a80-de.h>
+
+/* Intermediary clock dividers are not exported */
+#define CLK_FE0_DIV 31
+#define CLK_FE1_DIV 32
+#define CLK_FE2_DIV 33
+#define CLK_BE0_DIV 34
+#define CLK_BE1_DIV 35
+#define CLK_BE2_DIV 36
+
+#define CLK_NUMBER (CLK_BE2_DIV + 1)
+
+#endif /* _CCU_SUN9I_A80_DE_H_ */