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https://github.com/edk2-porting/linux-next.git
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b923ff6af0
IMX6 has been (ab)using the gic_arch_extn to provide wakeup from suspend, and it makes a lot of sense to convert this code to use stacked domains instead. This patch does just this, updating the DT files to actually reflect what the HW provides. BIG FAT WARNING: because the DTs were so far lying by not exposing the fact that the GPC block is actually the first interrupt controller in the chain, kernels with this patch applied wont have any suspend-resume facility when booted with old DTs, and old kernels with updated DTs won't even boot. Tested-by: Stefan Agner <stefan@agner.ch> Acked-by: Stefan Agner <stefan@agner.ch> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
109 lines
2.4 KiB
C
109 lines
2.4 KiB
C
/*
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* Copyright 2014 Freescale Semiconductor, Inc.
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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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#include <linux/irqchip.h>
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#include <linux/of_platform.h>
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#include <linux/phy.h>
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#include <linux/regmap.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 <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include "common.h"
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#include "cpuidle.h"
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static int ar8031_phy_fixup(struct phy_device *dev)
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{
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u16 val;
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/* Set RGMII IO voltage to 1.8V */
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phy_write(dev, 0x1d, 0x1f);
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phy_write(dev, 0x1e, 0x8);
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/* introduce tx clock delay */
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phy_write(dev, 0x1d, 0x5);
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val = phy_read(dev, 0x1e);
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val |= 0x0100;
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phy_write(dev, 0x1e, val);
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return 0;
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}
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#define PHY_ID_AR8031 0x004dd074
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static void __init imx6sx_enet_phy_init(void)
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{
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if (IS_BUILTIN(CONFIG_PHYLIB))
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phy_register_fixup_for_uid(PHY_ID_AR8031, 0xffffffff,
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ar8031_phy_fixup);
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}
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static void __init imx6sx_enet_clk_sel(void)
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{
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struct regmap *gpr;
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gpr = syscon_regmap_lookup_by_compatible("fsl,imx6sx-iomuxc-gpr");
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if (!IS_ERR(gpr)) {
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regmap_update_bits(gpr, IOMUXC_GPR1,
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IMX6SX_GPR1_FEC_CLOCK_MUX_SEL_MASK, 0);
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regmap_update_bits(gpr, IOMUXC_GPR1,
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IMX6SX_GPR1_FEC_CLOCK_PAD_DIR_MASK, 0);
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} else {
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pr_err("failed to find fsl,imx6sx-iomux-gpr regmap\n");
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}
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}
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static inline void imx6sx_enet_init(void)
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{
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imx6sx_enet_phy_init();
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imx6sx_enet_clk_sel();
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}
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static void __init imx6sx_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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imx6sx_enet_init();
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imx_anatop_init();
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imx6sx_pm_init();
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}
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static void __init imx6sx_init_irq(void)
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{
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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 imx6sx_init_late(void)
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{
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imx6sx_cpuidle_init();
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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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}
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static const char * const imx6sx_dt_compat[] __initconst = {
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"fsl,imx6sx",
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NULL,
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};
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DT_MACHINE_START(IMX6SX, "Freescale i.MX6 SoloX (Device Tree)")
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.init_irq = imx6sx_init_irq,
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.init_machine = imx6sx_init_machine,
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.dt_compat = imx6sx_dt_compat,
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.init_late = imx6sx_init_late,
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MACHINE_END
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