diff options
| -rw-r--r-- | Documentation/devicetree/bindings/clock/amlogic,gxbb-aoclkc.txt | 45 | ||||
| -rw-r--r-- | drivers/clk/meson/Makefile | 2 | ||||
| -rw-r--r-- | drivers/clk/meson/gxbb-aoclk.c | 191 | ||||
| -rw-r--r-- | include/dt-bindings/clock/gxbb-aoclkc.h | 66 | ||||
| -rw-r--r-- | include/dt-bindings/reset/gxbb-aoclkc.h | 66 |
5 files changed, 369 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/clock/amlogic,gxbb-aoclkc.txt b/Documentation/devicetree/bindings/clock/amlogic,gxbb-aoclkc.txt new file mode 100644 index 000000000000..a55d31b48d6e --- /dev/null +++ b/Documentation/devicetree/bindings/clock/amlogic,gxbb-aoclkc.txt @@ -0,0 +1,45 @@ +* Amlogic GXBB AO Clock and Reset Unit + +The Amlogic GXBB AO clock controller generates and supplies clock to various +controllers within the Always-On part of the SoC. + +Required Properties: + +- compatible: should be "amlogic,gxbb-aoclkc" +- reg: physical base address of the clock controller and length of memory + mapped region. + +- #clock-cells: should be 1. + +Each clock is assigned an identifier and client nodes can use this identifier +to specify the clock which they consume. All available clocks are defined as +preprocessor macros in the dt-bindings/clock/gxbb-aoclkc.h header and can be +used in device tree sources. + +- #reset-cells: should be 1. + +Each reset is assigned an identifier and client nodes can use this identifier +to specify the reset which they consume. All available resets are defined as +preprocessor macros in the dt-bindings/reset/gxbb-aoclkc.h header and can be +used in device tree sources. + +Example: AO Clock controller node: + + clkc_AO: clock-controller@040 { + compatible = "amlogic,gxbb-aoclkc"; + reg = <0x0 0x040 0x0 0x4>; + #clock-cells = <1>; + #reset-cells = <1>; + }; + +Example: UART controller node that consumes the clock and reset generated + by the clock controller: + + uart_AO: serial@4c0 { + compatible = "amlogic,meson-uart"; + reg = <0x4c0 0x14>; + interrupts = <0 90 1>; + clocks = <&clkc_AO CLKID_AO_UART1>; + resets = <&clkc_AO RESET_AO_UART1>; + status = "disabled"; + }; diff --git a/drivers/clk/meson/Makefile b/drivers/clk/meson/Makefile index 197e40175166..d4cd4a35d74e 100644 --- a/drivers/clk/meson/Makefile +++ b/drivers/clk/meson/Makefile @@ -4,4 +4,4 @@ obj-$(CONFIG_COMMON_CLK_AMLOGIC) += clk-pll.o clk-cpu.o clk-mpll.o obj-$(CONFIG_COMMON_CLK_MESON8B) += meson8b-clkc.o -obj-$(CONFIG_COMMON_CLK_GXBB) += gxbb.o +obj-$(CONFIG_COMMON_CLK_GXBB) += gxbb.o gxbb-aoclk.o diff --git a/drivers/clk/meson/gxbb-aoclk.c b/drivers/clk/meson/gxbb-aoclk.c new file mode 100644 index 000000000000..b45c5fba7e35 --- /dev/null +++ b/drivers/clk/meson/gxbb-aoclk.c @@ -0,0 +1,191 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright (c) 2016 BayLibre, SAS. + * Author: Neil Armstrong <narmstrong@baylibre.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + * The full GNU General Public License is included in this distribution + * in the file called COPYING. + * + * BSD LICENSE + * + * Copyright (c) 2016 BayLibre, SAS. + * Author: Neil Armstrong <narmstrong@baylibre.com> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +#include <linux/clk-provider.h> +#include <linux/of_address.h> +#include <linux/platform_device.h> +#include <linux/reset-controller.h> +#include <linux/init.h> +#include <dt-bindings/clock/gxbb-aoclkc.h> +#include <dt-bindings/reset/gxbb-aoclkc.h> + +static DEFINE_SPINLOCK(gxbb_aoclk_lock); + +struct gxbb_aoclk_reset_controller { + struct reset_controller_dev reset; + unsigned int *data; + void __iomem *base; +}; + +static int gxbb_aoclk_do_reset(struct reset_controller_dev *rcdev, + unsigned long id) +{ + struct gxbb_aoclk_reset_controller *reset = + container_of(rcdev, struct gxbb_aoclk_reset_controller, reset); + + writel(BIT(reset->data[id]), reset->base); + + return 0; +} + +static const struct reset_control_ops gxbb_aoclk_reset_ops = { + .reset = gxbb_aoclk_do_reset, +}; + +#define GXBB_AO_GATE(_name, _bit) \ +static struct clk_gate _name##_ao = { \ + .reg = (void __iomem *)0, \ + .bit_idx = (_bit), \ + .lock = &gxbb_aoclk_lock, \ + .hw.init = &(struct clk_init_data) { \ + .name = #_name "_ao", \ + .ops = &clk_gate_ops, \ + .parent_names = (const char *[]){ "clk81" }, \ + .num_parents = 1, \ + .flags = (CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED), \ + }, \ +} + +GXBB_AO_GATE(remote, 0); +GXBB_AO_GATE(i2c_master, 1); +GXBB_AO_GATE(i2c_slave, 2); +GXBB_AO_GATE(uart1, 3); +GXBB_AO_GATE(uart2, 5); +GXBB_AO_GATE(ir_blaster, 6); + +static unsigned int gxbb_aoclk_reset[] = { + [RESET_AO_REMOTE] = 16, + [RESET_AO_I2C_MASTER] = 18, + [RESET_AO_I2C_SLAVE] = 19, + [RESET_AO_UART1] = 17, + [RESET_AO_UART2] = 22, + [RESET_AO_IR_BLASTER] = 23, +}; + +static struct clk_gate *gxbb_aoclk_gate[] = { + [CLKID_AO_REMOTE] = &remote_ao, + [CLKID_AO_I2C_MASTER] = &i2c_master_ao, + [CLKID_AO_I2C_SLAVE] = &i2c_slave_ao, + [CLKID_AO_UART1] = &uart1_ao, + [CLKID_AO_UART2] = &uart2_ao, + [CLKID_AO_IR_BLASTER] = &ir_blaster_ao, +}; + +static struct clk_hw_onecell_data gxbb_aoclk_onecell_data = { + .hws = { + [CLKID_AO_REMOTE] = &remote_ao.hw, + [CLKID_AO_I2C_MASTER] = &i2c_master_ao.hw, + [CLKID_AO_I2C_SLAVE] = &i2c_slave_ao.hw, + [CLKID_AO_UART1] = &uart1_ao.hw, + [CLKID_AO_UART2] = &uart2_ao.hw, + [CLKID_AO_IR_BLASTER] = &ir_blaster_ao.hw, + }, + .num = ARRAY_SIZE(gxbb_aoclk_gate), +}; + +static int gxbb_aoclkc_probe(struct platform_device *pdev) +{ + struct resource *res; + void __iomem *base; + int ret, clkid; + struct device *dev = &pdev->dev; + struct gxbb_aoclk_reset_controller *rstc; + + rstc = devm_kzalloc(dev, sizeof(*rstc), GFP_KERNEL); + if (!rstc) + return -ENOMEM; + + /* Generic clocks */ + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + base = devm_ioremap_resource(dev, res); + if (IS_ERR(base)) + return PTR_ERR(base); + + /* Reset Controller */ + rstc->base = base; + rstc->data = gxbb_aoclk_reset; + rstc->reset.ops = &gxbb_aoclk_reset_ops; + rstc->reset.nr_resets = ARRAY_SIZE(gxbb_aoclk_reset); + rstc->reset.of_node = dev->of_node; + ret = devm_reset_controller_register(dev, &rstc->reset); + + /* + * Populate base address and register all clks + */ + for (clkid = 0; clkid < gxbb_aoclk_onecell_data.num; clkid++) { + gxbb_aoclk_gate[clkid]->reg = base; + + ret = devm_clk_hw_register(dev, + gxbb_aoclk_onecell_data.hws[clkid]); + if (ret) + return ret; + } + + return of_clk_add_hw_provider(dev->of_node, of_clk_hw_onecell_get, + &gxbb_aoclk_onecell_data); +} + +static const struct of_device_id gxbb_aoclkc_match_table[] = { + { .compatible = "amlogic,gxbb-aoclkc" }, + { } +}; + +static struct platform_driver gxbb_aoclkc_driver = { + .probe = gxbb_aoclkc_probe, + .driver = { + .name = "gxbb-aoclkc", + .of_match_table = gxbb_aoclkc_match_table, + }, +}; +builtin_platform_driver(gxbb_aoclkc_driver); diff --git a/include/dt-bindings/clock/gxbb-aoclkc.h b/include/dt-bindings/clock/gxbb-aoclkc.h new file mode 100644 index 000000000000..31751482d13c --- /dev/null +++ b/include/dt-bindings/clock/gxbb-aoclkc.h @@ -0,0 +1,66 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright (c) 2016 BayLibre, SAS. + * Author: Neil Armstrong <narmstrong@baylibre.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + * The full GNU General Public License is included in this distribution + * in the file called COPYING. + * + * BSD LICENSE + * + * Copyright (c) 2016 BayLibre, SAS. + * Author: Neil Armstrong <narmstrong@baylibre.com> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef DT_BINDINGS_CLOCK_AMLOGIC_MESON_GXBB_AOCLK +#define DT_BINDINGS_CLOCK_AMLOGIC_MESON_GXBB_AOCLK + +#define CLKID_AO_REMOTE 0 +#define CLKID_AO_I2C_MASTER 1 +#define CLKID_AO_I2C_SLAVE 2 +#define CLKID_AO_UART1 3 +#define CLKID_AO_UART2 4 +#define CLKID_AO_IR_BLASTER 5 + +#endif diff --git a/include/dt-bindings/reset/gxbb-aoclkc.h b/include/dt-bindings/reset/gxbb-aoclkc.h new file mode 100644 index 000000000000..9e3fd60c309c --- /dev/null +++ b/include/dt-bindings/reset/gxbb-aoclkc.h @@ -0,0 +1,66 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright (c) 2016 BayLibre, SAS. + * Author: Neil Armstrong <narmstrong@baylibre.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + * The full GNU General Public License is included in this distribution + * in the file called COPYING. + * + * BSD LICENSE + * + * Copyright (c) 2016 BayLibre, SAS. + * Author: Neil Armstrong <narmstrong@baylibre.com> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef DT_BINDINGS_RESET_AMLOGIC_MESON_GXBB_AOCLK +#define DT_BINDINGS_RESET_AMLOGIC_MESON_GXBB_AOCLK + +#define RESET_AO_REMOTE 0 +#define RESET_AO_I2C_MASTER 1 +#define RESET_AO_I2C_SLAVE 2 +#define RESET_AO_UART1 3 +#define RESET_AO_UART2 4 +#define RESET_AO_IR_BLASTER 5 + +#endif |