169 lines
4.0 KiB
C
169 lines
4.0 KiB
C
/*
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* Copyright 2013-2015 Freescale Semiconductor, Inc.
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* Copyright 2016 reMarkable AS
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/irqchip.h>
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#include <linux/of.h>
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#include <linux/of_platform.h>
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#include <linux/mfd/syscon.h>
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#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
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#include <linux/regmap.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include <linux/gpio.h>
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#include <config/brcmfmac.h>
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#include <linux/delay.h>
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#include <linux/platform_data/brcmfmac-sdio.h>
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#include "common.h"
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#include "hardware.h"
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#include "cpuidle.h"
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#define WL_PWR_ON IMX_GPIO_NR(3, 30)
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#define WL_REG_ON IMX_GPIO_NR(4, 0)
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static bool init_wifi_gpio(void)
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{
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int err;
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pr_debug("init_wifi_gpio: enter\n");
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pr_debug("init_wifi_gpio: Requesting GPIO_3_30 (PWR_ON) ..\n");
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err = gpio_request_one(WL_PWR_ON, GPIOF_OUT_INIT_LOW, "wl_pwr_on");
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if (err) {
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pr_err("Failed to request power GPIO for wifi: %d\n", err);
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return false;
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}
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pr_debug("init_wifi_gpio: OK !\n");
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pr_debug("init_wifi_gpio: Requesting GPIO4_0 (REG_ON) ..\n");
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err = gpio_request_one(WL_REG_ON, GPIOF_OUT_INIT_LOW, "wl_reg_on");
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if (err) {
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pr_err("Failed to request regulator GPIO for wifi: %d\n", err);
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return false;
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}
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pr_debug("init_wifi_gpio: OK !!\n");
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return true;
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}
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static void brcmfmac_power_on(void)
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{
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pr_debug("brcmfmac_power_on: enter\n");
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gpio_set_value(WL_PWR_ON, 1);
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gpio_set_value(WL_REG_ON, 1);
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}
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static void brcmfmac_power_off(void)
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{
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pr_debug("brcmfmac_power_off: enter\n");
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gpio_set_value(WL_PWR_ON, 0);
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gpio_set_value(WL_REG_ON, 0);
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}
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static void brcmfmac_reset(void)
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{
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pr_debug("brcmfmac_reset: enter\n");
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brcmfmac_power_off();
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msleep(5);
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brcmfmac_power_on();
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}
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static struct brcmfmac_sdio_platform_data brcmfmac_sdio_pdata = {
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.power_on = brcmfmac_power_on,
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.power_off = brcmfmac_power_off,
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.reset = brcmfmac_reset
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};
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static struct platform_device brcmfmac_device = {
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.name = BRCMFMAC_SDIO_PDATA_NAME,
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.id = PLATFORM_DEVID_NONE,
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.dev.platform_data = &brcmfmac_sdio_pdata
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};
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static void __init imx6sl_fec_clk_init(void)
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{
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struct regmap *gpr;
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/* set FEC clock from internal PLL clock source */
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gpr = syscon_regmap_lookup_by_compatible("fsl,imx6sl-iomuxc-gpr");
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if (!IS_ERR(gpr)) {
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regmap_update_bits(gpr, IOMUXC_GPR1,
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IMX6SL_GPR1_FEC_CLOCK_MUX2_SEL_MASK, 0);
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regmap_update_bits(gpr, IOMUXC_GPR1,
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IMX6SL_GPR1_FEC_CLOCK_MUX1_SEL_MASK, 0);
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} else
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pr_err("failed to find fsl,imx6sl-iomux-gpr regmap\n");
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if (init_wifi_gpio()) {
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platform_device_register(&brcmfmac_device);
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}
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}
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static inline void imx6sl_fec_init(void)
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{
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imx6sl_fec_clk_init();
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imx6_enet_mac_init("fsl,imx6sl-fec", "fsl,imx6sl-ocotp");
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}
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static void __init imx6sl_init_late(void)
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{
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/* imx6sl reuses imx6q cpufreq driver */
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if (IS_ENABLED(CONFIG_ARM_IMX6Q_CPUFREQ))
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platform_device_register_simple("imx6q-cpufreq", -1, NULL, 0);
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imx6sl_cpuidle_init();
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}
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static void __init imx6sl_init_machine(void)
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{
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struct device *parent;
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parent = imx_soc_device_init();
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if (parent == NULL)
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pr_warn("failed to initialize soc device\n");
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of_platform_populate(NULL, of_default_bus_match_table, NULL, parent);
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imx6sl_fec_init();
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imx_anatop_init();
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imx6sl_pm_init();
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}
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static void __init imx6sl_init_irq(void)
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{
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imx_gpc_check_dt();
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imx_init_revision_from_anatop();
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imx_init_l2cache();
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imx_src_init();
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irqchip_init();
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}
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static void __init imx6sl_map_io(void)
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{
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debug_ll_io_init();
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imx6_pm_map_io();
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#ifdef CONFIG_IMX_BUSFREQ
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imx_busfreq_map_io();
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#endif
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}
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static const char * const imx6sl_dt_compat[] __initconst = {
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"fsl,imx6sl",
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NULL,
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};
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DT_MACHINE_START(IMX6SL, "Freescale i.MX6 SoloLite (Device Tree)")
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.map_io = imx6sl_map_io,
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.init_irq = imx6sl_init_irq,
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.init_machine = imx6sl_init_machine,
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.init_late = imx6sl_init_late,
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.dt_compat = imx6sl_dt_compat,
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MACHINE_END
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