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It has been pointed out that naming a subsystem "genpd" isn't very self-explanatory and the acronym itself that means Generic PM Domain, is known only by a limited group of people. In a way to improve the situation, let's rename the subsystem to pmdomain, which ideally should indicate that this is about so called Power Domains or "PM domains" as we often also use within the Linux Kernel terminology. Suggested-by: Rafael J. Wysocki <rafael@kernel.org> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Heiko Stuebner <heiko@sntech.de> Acked-by: Rafael J. Wysocki <rafael@kernel.org> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Link: https://lore.kernel.org/r/20230912221127.487327-1-ulf.hansson@linaro.org
49 lines
909 B
C
49 lines
909 B
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Actions Semi Owl Smart Power System (SPS) shared helpers
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*
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* Copyright 2012 Actions Semi Inc.
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* Author: Actions Semi, Inc.
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*
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* Copyright (c) 2017 Andreas Färber
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*/
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#include <linux/delay.h>
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#include <linux/io.h>
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#include <linux/soc/actions/owl-sps.h>
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#define OWL_SPS_PG_CTL 0x0
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int owl_sps_set_pg(void __iomem *base, u32 pwr_mask, u32 ack_mask, bool enable)
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{
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u32 val;
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bool ack;
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int timeout;
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val = readl(base + OWL_SPS_PG_CTL);
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ack = val & ack_mask;
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if (ack == enable)
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return 0;
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if (enable)
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val |= pwr_mask;
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else
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val &= ~pwr_mask;
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writel(val, base + OWL_SPS_PG_CTL);
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for (timeout = 5000; timeout > 0; timeout -= 50) {
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val = readl(base + OWL_SPS_PG_CTL);
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if ((val & ack_mask) == (enable ? ack_mask : 0))
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break;
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udelay(50);
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}
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if (timeout <= 0)
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return -ETIMEDOUT;
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udelay(10);
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return 0;
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}
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EXPORT_SYMBOL_GPL(owl_sps_set_pg);
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