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SoC changes, a substantial part of this is cleanup of some of the older platforms that used to have a bunch of board files. In particular: - Removal of non-DT i.MX platforms that haven't seen activity in years, it's time to remove them. - A bunch of cleanup and removal of platform data for TI/OMAP platforms, moving over to genpd for power/reset control (yay!) - Major cleanup of Samsung S3C24xx and S3C64xx platforms, moving them closer to multiplatform support (not quite there yet, but getting close). THere are a few other changes too, smaller fixlets, etc. For new platform support, the primary ones re: - New SoC: Hisilicon SD5203, ARM926EJ-S platform. - Cpufreq support for i.MX7ULP -----BEGIN PGP SIGNATURE----- iQJDBAABCgAtFiEElf+HevZ4QCAJmMQ+jBrnPN6EHHcFAl+TT4gPHG9sb2ZAbGl4 b20ubmV0AAoJEIwa5zzehBx322MP/1mI56SyOFx30AqtWBPSjHJp+DzhOObyb4vD ndYuicBIn9tJwvVRBBZkfsbIU8EENVwrN3hOpesaj9L7xiqOqKakcnyC1REYmpIs 8XBDfdZzy5PrMHIu3fF1ZDCQyO7KndGf5DfLVxJtcf1tSPQyQCuIA3FtS6d8Bxnz r491+om67ucnlFD5X0Spm3RdZH+ECmXx2iXwoS0Zi7P+X+S+ovG8wBV/X0ggeoBc Zgi4W01SiRupmSVZ6PA7FvWaLGQErQAALQOcFtMcFgjeWzc1v2QzcURELH8JW7ro 72AH9st1Kvi3hoN2HNNzUnNUdQvZ+AdH8skMIpN/e1cBYqYStAF3gm/R9h+iVHbG GMmgzXHAFErfAW2UcF8tq1CzvQ5ChcTLNXdeoa8CeQbcDfocF3EyuKSPuDH+ve0H kk4tPesTAc6XCEVwLaGnoC75sdum5mSi8h9vqhln2KCdeTY7jxzH9YGHjm71Supb kV9vqo5Q5U/c5l2nU4r5q/DZdIahKsk3HIQZ0iG7BifAzamaTh4uyLVjtM6HSwNz tdHZaxoHd/PLI5IoeggFelx6qgvK5qVRLP0evgOdTLRFLj/ZbrOf0Q7DjdTy2BjZ Lgq461QqNapOzxq43G2IDT2+P62Q1+d+YLCKBgaGQaJicyU5m9STCNo3UBb1qH1h W6UwGF5z =0+Ee -----END PGP SIGNATURE----- Merge tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc Pull ARM SoC platform updates from Olof Johansson: "SoC changes, a substantial part of this is cleanup of some of the older platforms that used to have a bunch of board files. In particular: - Remove non-DT i.MX platforms that haven't seen activity in years, it's time to remove them. - A bunch of cleanup and removal of platform data for TI/OMAP platforms, moving over to genpd for power/reset control (yay!) - Major cleanup of Samsung S3C24xx and S3C64xx platforms, moving them closer to multiplatform support (not quite there yet, but getting close). There are a few other changes too, smaller fixlets, etc. For new platform support, the primary ones are: - New SoC: Hisilicon SD5203, ARM926EJ-S platform. - Cpufreq support for i.MX7ULP" * tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (121 commits) ARM: mstar: Select MStar intc ARM: stm32: Replace HTTP links with HTTPS ones ARM: debug: add UART early console support for SD5203 ARM: hisi: add support for SD5203 SoC ARM: omap3: enable off mode automatically clk: imx: imx35: Remove mx35_clocks_init() clk: imx: imx31: Remove mx31_clocks_init() clk: imx: imx27: Remove mx27_clocks_init() ARM: imx: Remove unused definitions ARM: imx35: Retrieve the IIM base address from devicetree ARM: imx3: Retrieve the AVIC base address from devicetree ARM: imx3: Retrieve the CCM base address from devicetree ARM: imx31: Retrieve the IIM base address from devicetree ARM: imx27: Retrieve the CCM base address from devicetree ARM: imx27: Retrieve the SYSCTRL base address from devicetree ARM: s3c64xx: bring back notes from removed debug-macro.S ARM: s3c24xx: fix Wunused-variable warning on !MMU ARM: samsung: fix PM debug build with DEBUG_LL but !MMU MAINTAINERS: mark linux-samsung-soc list non-moderated ARM: imx: Remove remnant board file support pieces ...
141 lines
2.9 KiB
C
141 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* OMAP IOMMU quirks for various TI SoCs
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*
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* Copyright (C) 2015-2019 Texas Instruments Incorporated - https://www.ti.com/
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* Suman Anna <s-anna@ti.com>
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*/
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#include <linux/platform_device.h>
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#include <linux/err.h>
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#include <linux/clk.h>
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#include <linux/list.h>
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#include "clockdomain.h"
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#include "powerdomain.h"
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struct pwrdm_link {
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struct device *dev;
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struct powerdomain *pwrdm;
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struct list_head node;
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};
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static DEFINE_SPINLOCK(iommu_lock);
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static struct clockdomain *emu_clkdm;
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static atomic_t emu_count;
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static void omap_iommu_dra7_emu_swsup_config(struct platform_device *pdev,
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bool enable)
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{
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struct device_node *np = pdev->dev.of_node;
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unsigned long flags;
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if (!of_device_is_compatible(np, "ti,dra7-dsp-iommu"))
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return;
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if (!emu_clkdm) {
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emu_clkdm = clkdm_lookup("emu_clkdm");
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if (WARN_ON_ONCE(!emu_clkdm))
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return;
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}
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spin_lock_irqsave(&iommu_lock, flags);
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if (enable && (atomic_inc_return(&emu_count) == 1))
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clkdm_deny_idle(emu_clkdm);
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else if (!enable && (atomic_dec_return(&emu_count) == 0))
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clkdm_allow_idle(emu_clkdm);
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spin_unlock_irqrestore(&iommu_lock, flags);
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}
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static struct powerdomain *_get_pwrdm(struct device *dev)
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{
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struct clk *clk;
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struct clk_hw_omap *hwclk;
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struct clockdomain *clkdm;
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struct powerdomain *pwrdm = NULL;
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struct pwrdm_link *entry;
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unsigned long flags;
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static LIST_HEAD(cache);
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spin_lock_irqsave(&iommu_lock, flags);
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list_for_each_entry(entry, &cache, node) {
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if (entry->dev == dev) {
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pwrdm = entry->pwrdm;
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break;
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}
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}
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spin_unlock_irqrestore(&iommu_lock, flags);
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if (pwrdm)
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return pwrdm;
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clk = of_clk_get(dev->of_node->parent, 0);
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if (IS_ERR(clk)) {
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dev_err(dev, "no fck found\n");
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return NULL;
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}
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hwclk = to_clk_hw_omap(__clk_get_hw(clk));
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clk_put(clk);
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if (!hwclk || !hwclk->clkdm_name) {
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dev_err(dev, "no hwclk data\n");
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return NULL;
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}
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clkdm = clkdm_lookup(hwclk->clkdm_name);
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if (!clkdm) {
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dev_err(dev, "clkdm not found: %s\n", hwclk->clkdm_name);
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return NULL;
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}
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pwrdm = clkdm_get_pwrdm(clkdm);
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if (!pwrdm) {
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dev_err(dev, "pwrdm not found: %s\n", clkdm->name);
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return NULL;
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}
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entry = kmalloc(sizeof(*entry), GFP_KERNEL);
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if (entry) {
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entry->dev = dev;
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entry->pwrdm = pwrdm;
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spin_lock_irqsave(&iommu_lock, flags);
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list_add(&entry->node, &cache);
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spin_unlock_irqrestore(&iommu_lock, flags);
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}
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return pwrdm;
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}
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int omap_iommu_set_pwrdm_constraint(struct platform_device *pdev, bool request,
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u8 *pwrst)
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{
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struct powerdomain *pwrdm;
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u8 next_pwrst;
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int ret = 0;
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pwrdm = _get_pwrdm(&pdev->dev);
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if (!pwrdm)
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return -ENODEV;
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if (request) {
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*pwrst = pwrdm_read_next_pwrst(pwrdm);
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omap_iommu_dra7_emu_swsup_config(pdev, true);
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}
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if (*pwrst > PWRDM_POWER_RET)
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goto out;
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next_pwrst = request ? PWRDM_POWER_ON : *pwrst;
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ret = pwrdm_set_next_pwrst(pwrdm, next_pwrst);
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out:
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if (!request)
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omap_iommu_dra7_emu_swsup_config(pdev, false);
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return ret;
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}
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