75a7f3f18e
We have now transferred all the U300 peripherals to the device tree, so we just select USE_OF, and delete all static board data, then require that this platform shall be booted using the device tree and nothing else. This gets rid of the MMCI (PL180), PL022, and serial PL011 platform data entries and more. Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
119 lines
2.9 KiB
C
119 lines
2.9 KiB
C
/*
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* arch/arm/mach-u300/regulator.c
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*
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* Copyright (C) 2009 ST-Ericsson AB
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* License terms: GNU General Public License (GPL) version 2
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* Handle board-bound regulators and board power not related
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* to any devices.
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* Author: Linus Walleij <linus.walleij@stericsson.com>
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*/
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#include <linux/device.h>
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#include <linux/signal.h>
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#include <linux/err.h>
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#include <linux/of.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/regulator/machine.h>
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#include <linux/regulator/consumer.h>
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/* Those are just for writing in syscon */
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#include <linux/io.h>
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#include <asm/mach-types.h>
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#include <mach/hardware.h>
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#include <mach/syscon.h>
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/*
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* Regulators that power the board and chip and which are
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* not copuled to specific drivers are hogged in these
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* instances.
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*/
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static struct regulator *main_power_15;
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/*
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* This function is used from pm.h to shut down the system by
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* resetting all regulators in turn and then disable regulator
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* LDO D (main power).
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*/
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void u300_pm_poweroff(void)
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{
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sigset_t old, all;
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sigfillset(&all);
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if (!sigprocmask(SIG_BLOCK, &all, &old)) {
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/* Disable LDO D to shut down the system */
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if (main_power_15)
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regulator_disable(main_power_15);
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else
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pr_err("regulator not available to shut down system\n");
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(void) sigprocmask(SIG_SETMASK, &old, NULL);
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}
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return;
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}
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/*
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* Hog the regulators needed to power up the board.
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*/
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static int __init __u300_init_boardpower(struct platform_device *pdev)
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{
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int err;
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u32 val;
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pr_info("U300: setting up board power\n");
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main_power_15 = regulator_get(&pdev->dev, "vana15");
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if (IS_ERR(main_power_15)) {
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pr_err("could not get vana15");
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return PTR_ERR(main_power_15);
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}
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err = regulator_enable(main_power_15);
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if (err) {
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pr_err("could not enable vana15\n");
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return err;
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}
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/*
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* On U300 a special system controller register pulls up the DC
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* until the vana15 (LDO D) regulator comes up. At this point, all
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* regulators are set and we do not need power control via
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* DC ON anymore. This function will likely be moved whenever
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* the rest of the U300 power management is implemented.
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*/
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pr_info("U300: disable system controller pull-up\n");
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val = readw(U300_SYSCON_VBASE + U300_SYSCON_PMCR);
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val &= ~U300_SYSCON_PMCR_DCON_ENABLE;
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writew(val, U300_SYSCON_VBASE + U300_SYSCON_PMCR);
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/* Register globally exported PM poweroff hook */
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pm_power_off = u300_pm_poweroff;
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return 0;
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}
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static int __init s365_board_probe(struct platform_device *pdev)
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{
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return __u300_init_boardpower(pdev);
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}
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static const struct of_device_id s365_board_match[] = {
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{ .compatible = "stericsson,s365" },
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{},
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};
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static struct platform_driver s365_board_driver = {
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.driver = {
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.name = "s365-board",
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.owner = THIS_MODULE,
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.of_match_table = s365_board_match,
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},
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};
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/*
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* So at module init time we hog the regulator!
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*/
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static int __init u300_init_boardpower(void)
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{
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return platform_driver_probe(&s365_board_driver,
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s365_board_probe);
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}
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device_initcall(u300_init_boardpower);
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