mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-21 01:51:18 +00:00
Code Issues Releases Wiki Activity
linux-stable/drivers/clk/imx/clk-imx8qxp.c
Dong Aisheng 77d8f3068c clk: imx: scu: add two cells binding support 
This patch implements the new two cells binding for SCU clocks.
The usage is as follows:
clocks = <&uart0_clk IMX_SC_R_UART_0 IMX_SC_PM_CLK_PER>

Due to each SCU clock is associated with a power domain, without power
on the domain, the SCU clock can't work. So we create platform devices
for each domain clock respectively and manually attach the required domain
before register the clock devices, then we can register clocks in the
clock platform driver accordingly.

Note because we do not have power domain info in device tree and the SCU
resource ID is the same for power domain and clock, so we use resource ID
to find power domains.

Later, we will also use this clock platform driver to support suspend/resume
and runtime pm.

Cc: Stephen Boyd <sboyd@kernel.org>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Michael Turquette <mturquette@baylibre.com>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2020-10-26 10:53:13 +08:00

174 lines
9.5 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2018 NXP
* Dong Aisheng <aisheng.dong@nxp.com>
*/
#include <linux/clk-provider.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include "clk-scu.h"
#include <dt-bindings/clock/imx8-clock.h>
#include <dt-bindings/firmware/imx/rsrc.h>
static int imx8qxp_clk_probe(struct platform_device *pdev)
{
struct device_node *ccm_node = pdev->dev.of_node;
struct clk_hw_onecell_data *clk_data;
struct clk_hw **clks;
u32 clk_cells;
int ret, i;
ret = imx_clk_scu_init(ccm_node);
if (ret)
return ret;
clk_data = devm_kzalloc(&pdev->dev, struct_size(clk_data, hws,
IMX_SCU_CLK_END), GFP_KERNEL);
if (!clk_data)
return -ENOMEM;
if (of_property_read_u32(ccm_node, "#clock-cells", &clk_cells))
return -EINVAL;
clk_data->num = IMX_SCU_CLK_END;
clks = clk_data->hws;
/* Fixed clocks */
clks[IMX_CLK_DUMMY] = clk_hw_register_fixed_rate(NULL, "dummy", NULL, 0, 0);
clks[IMX_ADMA_IPG_CLK_ROOT] = clk_hw_register_fixed_rate(NULL, "dma_ipg_clk_root", NULL, 0, 120000000);
clks[IMX_CONN_AXI_CLK_ROOT] = clk_hw_register_fixed_rate(NULL, "conn_axi_clk_root", NULL, 0, 333333333);
clks[IMX_CONN_AHB_CLK_ROOT] = clk_hw_register_fixed_rate(NULL, "conn_ahb_clk_root", NULL, 0, 166666666);
clks[IMX_CONN_IPG_CLK_ROOT] = clk_hw_register_fixed_rate(NULL, "conn_ipg_clk_root", NULL, 0, 83333333);
clks[IMX_DC_AXI_EXT_CLK] = clk_hw_register_fixed_rate(NULL, "dc_axi_ext_clk_root", NULL, 0, 800000000);
clks[IMX_DC_AXI_INT_CLK] = clk_hw_register_fixed_rate(NULL, "dc_axi_int_clk_root", NULL, 0, 400000000);
clks[IMX_DC_CFG_CLK] = clk_hw_register_fixed_rate(NULL, "dc_cfg_clk_root", NULL, 0, 100000000);
clks[IMX_MIPI_IPG_CLK] = clk_hw_register_fixed_rate(NULL, "mipi_ipg_clk_root", NULL, 0, 120000000);
clks[IMX_IMG_AXI_CLK] = clk_hw_register_fixed_rate(NULL, "img_axi_clk_root", NULL, 0, 400000000);
clks[IMX_IMG_IPG_CLK] = clk_hw_register_fixed_rate(NULL, "img_ipg_clk_root", NULL, 0, 200000000);
clks[IMX_IMG_PXL_CLK] = clk_hw_register_fixed_rate(NULL, "img_pxl_clk_root", NULL, 0, 600000000);
clks[IMX_HSIO_AXI_CLK] = clk_hw_register_fixed_rate(NULL, "hsio_axi_clk_root", NULL, 0, 400000000);
clks[IMX_HSIO_PER_CLK] = clk_hw_register_fixed_rate(NULL, "hsio_per_clk_root", NULL, 0, 133333333);
clks[IMX_LSIO_MEM_CLK] = clk_hw_register_fixed_rate(NULL, "lsio_mem_clk_root", NULL, 0, 200000000);
clks[IMX_LSIO_BUS_CLK] = clk_hw_register_fixed_rate(NULL, "lsio_bus_clk_root", NULL, 0, 100000000);
/* ARM core */
clks[IMX_A35_CLK] = imx_clk_scu("a35_clk", IMX_SC_R_A35, IMX_SC_PM_CLK_CPU, clk_cells);
/* LSIO SS */
clks[IMX_LSIO_PWM0_CLK] = imx_clk_scu("pwm0_clk", IMX_SC_R_PWM_0, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_LSIO_PWM1_CLK] = imx_clk_scu("pwm1_clk", IMX_SC_R_PWM_1, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_LSIO_PWM2_CLK] = imx_clk_scu("pwm2_clk", IMX_SC_R_PWM_2, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_LSIO_PWM3_CLK] = imx_clk_scu("pwm3_clk", IMX_SC_R_PWM_3, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_LSIO_PWM4_CLK] = imx_clk_scu("pwm4_clk", IMX_SC_R_PWM_4, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_LSIO_PWM5_CLK] = imx_clk_scu("pwm5_clk", IMX_SC_R_PWM_5, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_LSIO_PWM6_CLK] = imx_clk_scu("pwm6_clk", IMX_SC_R_PWM_6, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_LSIO_PWM7_CLK] = imx_clk_scu("pwm7_clk", IMX_SC_R_PWM_7, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_LSIO_GPT0_CLK] = imx_clk_scu("gpt0_clk", IMX_SC_R_GPT_0, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_LSIO_GPT1_CLK] = imx_clk_scu("gpt1_clk", IMX_SC_R_GPT_1, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_LSIO_GPT2_CLK] = imx_clk_scu("gpt2_clk", IMX_SC_R_GPT_2, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_LSIO_GPT3_CLK] = imx_clk_scu("gpt3_clk", IMX_SC_R_GPT_3, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_LSIO_GPT4_CLK] = imx_clk_scu("gpt4_clk", IMX_SC_R_GPT_4, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_LSIO_FSPI0_CLK] = imx_clk_scu("fspi0_clk", IMX_SC_R_FSPI_0, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_LSIO_FSPI1_CLK] = imx_clk_scu("fspi1_clk", IMX_SC_R_FSPI_1, IMX_SC_PM_CLK_PER, clk_cells);
/* ADMA SS */
clks[IMX_ADMA_UART0_CLK] = imx_clk_scu("uart0_clk", IMX_SC_R_UART_0, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_ADMA_UART1_CLK] = imx_clk_scu("uart1_clk", IMX_SC_R_UART_1, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_ADMA_UART2_CLK] = imx_clk_scu("uart2_clk", IMX_SC_R_UART_2, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_ADMA_UART3_CLK] = imx_clk_scu("uart3_clk", IMX_SC_R_UART_3, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_ADMA_SPI0_CLK] = imx_clk_scu("spi0_clk", IMX_SC_R_SPI_0, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_ADMA_SPI1_CLK] = imx_clk_scu("spi1_clk", IMX_SC_R_SPI_1, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_ADMA_SPI2_CLK] = imx_clk_scu("spi2_clk", IMX_SC_R_SPI_2, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_ADMA_SPI3_CLK] = imx_clk_scu("spi3_clk", IMX_SC_R_SPI_3, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_ADMA_CAN0_CLK] = imx_clk_scu("can0_clk", IMX_SC_R_CAN_0, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_ADMA_I2C0_CLK] = imx_clk_scu("i2c0_clk", IMX_SC_R_I2C_0, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_ADMA_I2C1_CLK] = imx_clk_scu("i2c1_clk", IMX_SC_R_I2C_1, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_ADMA_I2C2_CLK] = imx_clk_scu("i2c2_clk", IMX_SC_R_I2C_2, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_ADMA_I2C3_CLK] = imx_clk_scu("i2c3_clk", IMX_SC_R_I2C_3, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_ADMA_FTM0_CLK] = imx_clk_scu("ftm0_clk", IMX_SC_R_FTM_0, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_ADMA_FTM1_CLK] = imx_clk_scu("ftm1_clk", IMX_SC_R_FTM_1, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_ADMA_ADC0_CLK] = imx_clk_scu("adc0_clk", IMX_SC_R_ADC_0, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_ADMA_PWM_CLK] = imx_clk_scu("pwm_clk", IMX_SC_R_LCD_0_PWM_0, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_ADMA_LCD_CLK] = imx_clk_scu("lcd_clk", IMX_SC_R_LCD_0, IMX_SC_PM_CLK_PER, clk_cells);
/* Connectivity */
clks[IMX_CONN_SDHC0_CLK] = imx_clk_scu("sdhc0_clk", IMX_SC_R_SDHC_0, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_CONN_SDHC1_CLK] = imx_clk_scu("sdhc1_clk", IMX_SC_R_SDHC_1, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_CONN_SDHC2_CLK] = imx_clk_scu("sdhc2_clk", IMX_SC_R_SDHC_2, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_CONN_ENET0_ROOT_CLK] = imx_clk_scu("enet0_clk", IMX_SC_R_ENET_0, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_CONN_ENET0_BYPASS_CLK] = imx_clk_scu("enet0_bypass_clk", IMX_SC_R_ENET_0, IMX_SC_PM_CLK_BYPASS, clk_cells);
clks[IMX_CONN_ENET0_RGMII_CLK] = imx_clk_scu("enet0_rgmii_clk", IMX_SC_R_ENET_0, IMX_SC_PM_CLK_MISC0, clk_cells);
clks[IMX_CONN_ENET1_ROOT_CLK] = imx_clk_scu("enet1_clk", IMX_SC_R_ENET_1, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_CONN_ENET1_BYPASS_CLK] = imx_clk_scu("enet1_bypass_clk", IMX_SC_R_ENET_1, IMX_SC_PM_CLK_BYPASS, clk_cells);
clks[IMX_CONN_ENET1_RGMII_CLK] = imx_clk_scu("enet1_rgmii_clk", IMX_SC_R_ENET_1, IMX_SC_PM_CLK_MISC0, clk_cells);
clks[IMX_CONN_GPMI_BCH_IO_CLK] = imx_clk_scu("gpmi_io_clk", IMX_SC_R_NAND, IMX_SC_PM_CLK_MST_BUS, clk_cells);
clks[IMX_CONN_GPMI_BCH_CLK] = imx_clk_scu("gpmi_bch_clk", IMX_SC_R_NAND, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_CONN_USB2_ACLK] = imx_clk_scu("usb3_aclk_div", IMX_SC_R_USB_2, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_CONN_USB2_BUS_CLK] = imx_clk_scu("usb3_bus_div", IMX_SC_R_USB_2, IMX_SC_PM_CLK_MST_BUS, clk_cells);
clks[IMX_CONN_USB2_LPM_CLK] = imx_clk_scu("usb3_lpm_div", IMX_SC_R_USB_2, IMX_SC_PM_CLK_MISC, clk_cells);
/* Display controller SS */
clks[IMX_DC0_DISP0_CLK] = imx_clk_scu("dc0_disp0_clk", IMX_SC_R_DC_0, IMX_SC_PM_CLK_MISC0, clk_cells);
clks[IMX_DC0_DISP1_CLK] = imx_clk_scu("dc0_disp1_clk", IMX_SC_R_DC_0, IMX_SC_PM_CLK_MISC1, clk_cells);
/* MIPI-LVDS SS */
clks[IMX_MIPI0_I2C0_CLK] = imx_clk_scu("mipi0_i2c0_clk", IMX_SC_R_MIPI_0_I2C_0, IMX_SC_PM_CLK_MISC2, clk_cells);
clks[IMX_MIPI0_I2C1_CLK] = imx_clk_scu("mipi0_i2c1_clk", IMX_SC_R_MIPI_0_I2C_1, IMX_SC_PM_CLK_MISC2, clk_cells);
/* MIPI CSI SS */
clks[IMX_CSI0_CORE_CLK] = imx_clk_scu("mipi_csi0_core_clk", IMX_SC_R_CSI_0, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_CSI0_ESC_CLK] = imx_clk_scu("mipi_csi0_esc_clk", IMX_SC_R_CSI_0, IMX_SC_PM_CLK_MISC, clk_cells);
clks[IMX_CSI0_I2C0_CLK] = imx_clk_scu("mipi_csi0_i2c0_clk", IMX_SC_R_CSI_0_I2C_0, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_CSI0_PWM0_CLK] = imx_clk_scu("mipi_csi0_pwm0_clk", IMX_SC_R_CSI_0_PWM_0, IMX_SC_PM_CLK_PER, clk_cells);
/* GPU SS */
clks[IMX_GPU0_CORE_CLK] = imx_clk_scu("gpu_core0_clk", IMX_SC_R_GPU_0_PID0, IMX_SC_PM_CLK_PER, clk_cells);
clks[IMX_GPU0_SHADER_CLK] = imx_clk_scu("gpu_shader0_clk", IMX_SC_R_GPU_0_PID0, IMX_SC_PM_CLK_MISC, clk_cells);
for (i = 0; i < clk_data->num; i++) {
if (IS_ERR(clks[i]))
pr_warn("i.MX clk %u: register failed with %ld\n",
i, PTR_ERR(clks[i]));
}
if (clk_cells == 2) {
ret = of_clk_add_hw_provider(ccm_node, imx_scu_of_clk_src_get, imx_scu_clks);
if (ret)
imx_clk_scu_unregister();
} else {
/*
* legacy binding code path doesn't unregister here because
* it will be removed later.
*/
ret = of_clk_add_hw_provider(ccm_node, of_clk_hw_onecell_get, clk_data);
}
return ret;
}
static const struct of_device_id imx8qxp_match[] = {
{ .compatible = "fsl,scu-clk", },
{ .compatible = "fsl,imx8qxp-clk", },
{ /* sentinel */ }
};
static struct platform_driver imx8qxp_clk_driver = {
.driver = {
.name = "imx8qxp-clk",
.of_match_table = imx8qxp_match,
.suppress_bind_attrs = true,
},
.probe = imx8qxp_clk_probe,
};
builtin_platform_driver(imx8qxp_clk_driver);
MODULE_AUTHOR("Aisheng Dong <aisheng.dong@nxp.com>");
MODULE_DESCRIPTION("NXP i.MX8QXP clock driver");
MODULE_LICENSE("GPL v2");
Reference in a new issue View git blame Copy permalink