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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
79 lines
2.3 KiB
C
79 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Freescale i.MX28 Battery measurement init
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*
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* Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
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* on behalf of DENX Software Engineering GmbH
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*/
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#include <common.h>
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#include <config.h>
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#include <asm/io.h>
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#include <asm/arch/imx-regs.h>
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#include "mxs_init.h"
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void mxs_lradc_init(void)
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{
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struct mxs_lradc_regs *regs = (struct mxs_lradc_regs *)MXS_LRADC_BASE;
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debug("SPL: Initialisating LRADC\n");
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writel(LRADC_CTRL0_SFTRST, ®s->hw_lradc_ctrl0_clr);
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writel(LRADC_CTRL0_CLKGATE, ®s->hw_lradc_ctrl0_clr);
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writel(LRADC_CTRL0_ONCHIP_GROUNDREF, ®s->hw_lradc_ctrl0_clr);
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clrsetbits_le32(®s->hw_lradc_ctrl3,
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LRADC_CTRL3_CYCLE_TIME_MASK,
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LRADC_CTRL3_CYCLE_TIME_6MHZ);
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clrsetbits_le32(®s->hw_lradc_ctrl4,
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LRADC_CTRL4_LRADC7SELECT_MASK |
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LRADC_CTRL4_LRADC6SELECT_MASK,
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LRADC_CTRL4_LRADC7SELECT_CHANNEL7 |
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LRADC_CTRL4_LRADC6SELECT_CHANNEL10);
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}
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void mxs_lradc_enable_batt_measurement(void)
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{
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struct mxs_lradc_regs *regs = (struct mxs_lradc_regs *)MXS_LRADC_BASE;
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debug("SPL: Enabling LRADC battery measurement\n");
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/* Check if the channel is present at all. */
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if (!(readl(®s->hw_lradc_status) & LRADC_STATUS_CHANNEL7_PRESENT)) {
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debug("SPL: LRADC channel 7 is not present - aborting\n");
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return;
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}
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debug("SPL: LRADC channel 7 is present - configuring\n");
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writel(LRADC_CTRL1_LRADC7_IRQ_EN, ®s->hw_lradc_ctrl1_clr);
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writel(LRADC_CTRL1_LRADC7_IRQ, ®s->hw_lradc_ctrl1_clr);
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clrsetbits_le32(®s->hw_lradc_conversion,
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LRADC_CONVERSION_SCALE_FACTOR_MASK,
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LRADC_CONVERSION_SCALE_FACTOR_LI_ION);
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writel(LRADC_CONVERSION_AUTOMATIC, ®s->hw_lradc_conversion_set);
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/* Configure the channel. */
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writel((1 << 7) << LRADC_CTRL2_DIVIDE_BY_TWO_OFFSET,
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®s->hw_lradc_ctrl2_clr);
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writel(0xffffffff, ®s->hw_lradc_ch7_clr);
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clrbits_le32(®s->hw_lradc_ch7, LRADC_CH_NUM_SAMPLES_MASK);
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writel(LRADC_CH_ACCUMULATE, ®s->hw_lradc_ch7_clr);
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/* Schedule the channel. */
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writel(1 << 7, ®s->hw_lradc_ctrl0_set);
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/* Start the channel sampling. */
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writel(((1 << 7) << LRADC_DELAY_TRIGGER_LRADCS_OFFSET) |
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((1 << 3) << LRADC_DELAY_TRIGGER_DELAYS_OFFSET) |
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100, ®s->hw_lradc_delay3);
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writel(0xffffffff, ®s->hw_lradc_ch7_clr);
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writel(LRADC_DELAY_KICK, ®s->hw_lradc_delay3_set);
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debug("SPL: LRADC channel 7 configuration complete\n");
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}
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