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https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git
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ARM: shmobile: R-Mobile: Move pm-rmobile to drivers/soc/renesas/
The pm-rmobile driver is really a driver for the System Controller (SYSC) found in R-Mobile SoCs. An equivalent driver for R-Car SoCs is already located under drivers/soc/renesas/. Hence move the pm-rmobile driver from arch/arm/mach-shmobile/ to drivers/soc/renesas/, and rename it to rmobile-sysc. Enable compile-testing on non-ARM and non-R-Mobile SoCs. Signed-off-by: Geert Uytterhoeven <[email protected]> Signed-off-by: Simon Horman <[email protected]>
This commit is contained in:
Geert Uytterhoeven
Simon Horman
parent
445aeb081b
commit
2ed29e15e4
5 changed files with 7 additions and 7 deletions
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@ -34,9 +34,11 @@ config ARCH_RCAR_GEN3
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config ARCH_RMOBILE
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bool
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select PM_RMOBILE
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select PM
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select PM_GENERIC_DOMAINS
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select SYS_SUPPORTS_SH_CMT
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select SYS_SUPPORTS_SH_TMU
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select SYSC_RMOBILE
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config ARCH_RZN1
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bool
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@ -297,4 +299,7 @@ config RST_RCAR
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config SYSC_RCAR
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bool "R-Car System Controller support" if COMPILE_TEST
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config SYSC_RMOBILE
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bool "R-Mobile System Controller support" if COMPILE_TEST
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endif # SOC_RENESAS
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@ -27,3 +27,4 @@ endif
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# Family
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obj-$(CONFIG_RST_RCAR) += rcar-rst.o
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obj-$(CONFIG_SYSC_RCAR) += rcar-sysc.o
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obj-$(CONFIG_SYSC_RMOBILE) += rmobile-sysc.o
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352
drivers/soc/renesas/rmobile-sysc.c
Normal file
352
drivers/soc/renesas/rmobile-sysc.c
Normal file
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@ -0,0 +1,352 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* rmobile power management support
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*
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* Copyright (C) 2012 Renesas Solutions Corp.
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* Copyright (C) 2012 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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* Copyright (C) 2014 Glider bvba
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*
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* based on pm-sh7372.c
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* Copyright (C) 2011 Magnus Damm
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*/
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#include <linux/clk/renesas.h>
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#include <linux/console.h>
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#include <linux/delay.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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#include <linux/pm.h>
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#include <linux/pm_clock.h>
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#include <linux/pm_domain.h>
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#include <linux/slab.h>
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#include <asm/io.h>
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/* SYSC */
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#define SPDCR 0x08 /* SYS Power Down Control Register */
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#define SWUCR 0x14 /* SYS Wakeup Control Register */
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#define PSTR 0x80 /* Power Status Register */
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#define PSTR_RETRIES 100
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#define PSTR_DELAY_US 10
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struct rmobile_pm_domain {
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struct generic_pm_domain genpd;
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struct dev_power_governor *gov;
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int (*suspend)(void);
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void __iomem *base;
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unsigned int bit_shift;
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};
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static inline
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struct rmobile_pm_domain *to_rmobile_pd(struct generic_pm_domain *d)
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{
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return container_of(d, struct rmobile_pm_domain, genpd);
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}
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static int rmobile_pd_power_down(struct generic_pm_domain *genpd)
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{
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struct rmobile_pm_domain *rmobile_pd = to_rmobile_pd(genpd);
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unsigned int mask;
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if (rmobile_pd->bit_shift == ~0)
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return -EBUSY;
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mask = BIT(rmobile_pd->bit_shift);
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if (rmobile_pd->suspend) {
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int ret = rmobile_pd->suspend();
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if (ret)
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return ret;
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}
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if (__raw_readl(rmobile_pd->base + PSTR) & mask) {
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unsigned int retry_count;
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__raw_writel(mask, rmobile_pd->base + SPDCR);
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for (retry_count = PSTR_RETRIES; retry_count; retry_count--) {
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if (!(__raw_readl(rmobile_pd->base + SPDCR) & mask))
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break;
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cpu_relax();
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}
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}
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pr_debug("%s: Power off, 0x%08x -> PSTR = 0x%08x\n", genpd->name, mask,
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__raw_readl(rmobile_pd->base + PSTR));
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return 0;
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}
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static int __rmobile_pd_power_up(struct rmobile_pm_domain *rmobile_pd)
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{
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unsigned int mask;
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unsigned int retry_count;
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int ret = 0;
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if (rmobile_pd->bit_shift == ~0)
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return 0;
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mask = BIT(rmobile_pd->bit_shift);
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if (__raw_readl(rmobile_pd->base + PSTR) & mask)
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return ret;
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__raw_writel(mask, rmobile_pd->base + SWUCR);
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for (retry_count = 2 * PSTR_RETRIES; retry_count; retry_count--) {
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if (!(__raw_readl(rmobile_pd->base + SWUCR) & mask))
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break;
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if (retry_count > PSTR_RETRIES)
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udelay(PSTR_DELAY_US);
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else
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cpu_relax();
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}
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if (!retry_count)
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ret = -EIO;
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pr_debug("%s: Power on, 0x%08x -> PSTR = 0x%08x\n",
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rmobile_pd->genpd.name, mask,
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__raw_readl(rmobile_pd->base + PSTR));
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return ret;
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}
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static int rmobile_pd_power_up(struct generic_pm_domain *genpd)
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{
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return __rmobile_pd_power_up(to_rmobile_pd(genpd));
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}
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static void rmobile_init_pm_domain(struct rmobile_pm_domain *rmobile_pd)
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{
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struct generic_pm_domain *genpd = &rmobile_pd->genpd;
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struct dev_power_governor *gov = rmobile_pd->gov;
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genpd->flags |= GENPD_FLAG_PM_CLK | GENPD_FLAG_ACTIVE_WAKEUP;
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genpd->power_off = rmobile_pd_power_down;
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genpd->power_on = rmobile_pd_power_up;
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genpd->attach_dev = cpg_mstp_attach_dev;
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genpd->detach_dev = cpg_mstp_detach_dev;
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__rmobile_pd_power_up(rmobile_pd);
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pm_genpd_init(genpd, gov ? : &simple_qos_governor, false);
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}
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static int rmobile_pd_suspend_console(void)
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{
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/*
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* Serial consoles make use of SCIF hardware located in this domain,
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* hence keep the power domain on if "no_console_suspend" is set.
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*/
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return console_suspend_enabled ? 0 : -EBUSY;
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}
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enum pd_types {
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PD_NORMAL,
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PD_CPU,
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PD_CONSOLE,
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PD_DEBUG,
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PD_MEMCTL,
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};
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#define MAX_NUM_SPECIAL_PDS 16
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static struct special_pd {
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struct device_node *pd;
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enum pd_types type;
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} special_pds[MAX_NUM_SPECIAL_PDS] __initdata;
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static unsigned int num_special_pds __initdata;
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static const struct of_device_id special_ids[] __initconst = {
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{ .compatible = "arm,coresight-etm3x", .data = (void *)PD_DEBUG },
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{ .compatible = "renesas,dbsc-r8a73a4", .data = (void *)PD_MEMCTL, },
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{ .compatible = "renesas,dbsc3-r8a7740", .data = (void *)PD_MEMCTL, },
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{ .compatible = "renesas,sbsc-sh73a0", .data = (void *)PD_MEMCTL, },
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{ /* sentinel */ },
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};
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static void __init add_special_pd(struct device_node *np, enum pd_types type)
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{
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unsigned int i;
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struct device_node *pd;
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pd = of_parse_phandle(np, "power-domains", 0);
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if (!pd)
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return;
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for (i = 0; i < num_special_pds; i++)
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if (pd == special_pds[i].pd && type == special_pds[i].type) {
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of_node_put(pd);
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return;
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}
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if (num_special_pds == ARRAY_SIZE(special_pds)) {
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pr_warn("Too many special PM domains\n");
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of_node_put(pd);
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return;
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}
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pr_debug("Special PM domain %pOFn type %d for %pOF\n", pd, type, np);
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special_pds[num_special_pds].pd = pd;
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special_pds[num_special_pds].type = type;
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num_special_pds++;
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}
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static void __init get_special_pds(void)
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{
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struct device_node *np;
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const struct of_device_id *id;
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/* PM domains containing CPUs */
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for_each_of_cpu_node(np)
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add_special_pd(np, PD_CPU);
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/* PM domain containing console */
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if (of_stdout)
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add_special_pd(of_stdout, PD_CONSOLE);
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/* PM domains containing other special devices */
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for_each_matching_node_and_match(np, special_ids, &id)
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add_special_pd(np, (enum pd_types)id->data);
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}
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static void __init put_special_pds(void)
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{
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unsigned int i;
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for (i = 0; i < num_special_pds; i++)
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of_node_put(special_pds[i].pd);
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}
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static enum pd_types __init pd_type(const struct device_node *pd)
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{
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unsigned int i;
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for (i = 0; i < num_special_pds; i++)
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if (pd == special_pds[i].pd)
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return special_pds[i].type;
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return PD_NORMAL;
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}
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static void __init rmobile_setup_pm_domain(struct device_node *np,
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struct rmobile_pm_domain *pd)
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{
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const char *name = pd->genpd.name;
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switch (pd_type(np)) {
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case PD_CPU:
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/*
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* This domain contains the CPU core and therefore it should
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* only be turned off if the CPU is not in use.
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*/
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pr_debug("PM domain %s contains CPU\n", name);
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pd->genpd.flags |= GENPD_FLAG_ALWAYS_ON;
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break;
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case PD_CONSOLE:
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pr_debug("PM domain %s contains serial console\n", name);
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pd->gov = &pm_domain_always_on_gov;
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pd->suspend = rmobile_pd_suspend_console;
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break;
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case PD_DEBUG:
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/*
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* This domain contains the Coresight-ETM hardware block and
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* therefore it should only be turned off if the debug module
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* is not in use.
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*/
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pr_debug("PM domain %s contains Coresight-ETM\n", name);
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pd->genpd.flags |= GENPD_FLAG_ALWAYS_ON;
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break;
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case PD_MEMCTL:
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/*
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* This domain contains a memory-controller and therefore it
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* should only be turned off if memory is not in use.
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*/
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pr_debug("PM domain %s contains MEMCTL\n", name);
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pd->genpd.flags |= GENPD_FLAG_ALWAYS_ON;
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break;
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case PD_NORMAL:
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break;
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}
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rmobile_init_pm_domain(pd);
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}
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static int __init rmobile_add_pm_domains(void __iomem *base,
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struct device_node *parent,
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struct generic_pm_domain *genpd_parent)
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{
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struct device_node *np;
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for_each_child_of_node(parent, np) {
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struct rmobile_pm_domain *pd;
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u32 idx = ~0;
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if (of_property_read_u32(np, "reg", &idx)) {
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/* always-on domain */
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}
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pd = kzalloc(sizeof(*pd), GFP_KERNEL);
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if (!pd) {
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of_node_put(np);
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return -ENOMEM;
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}
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pd->genpd.name = np->name;
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pd->base = base;
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pd->bit_shift = idx;
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rmobile_setup_pm_domain(np, pd);
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if (genpd_parent)
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pm_genpd_add_subdomain(genpd_parent, &pd->genpd);
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of_genpd_add_provider_simple(np, &pd->genpd);
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rmobile_add_pm_domains(base, np, &pd->genpd);
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}
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return 0;
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}
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static int __init rmobile_init_pm_domains(void)
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{
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struct device_node *np, *pmd;
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bool scanned = false;
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void __iomem *base;
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int ret = 0;
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for_each_compatible_node(np, NULL, "renesas,sysc-rmobile") {
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base = of_iomap(np, 0);
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if (!base) {
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pr_warn("%pOF cannot map reg 0\n", np);
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continue;
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}
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pmd = of_get_child_by_name(np, "pm-domains");
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if (!pmd) {
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pr_warn("%pOF lacks pm-domains node\n", np);
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continue;
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}
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if (!scanned) {
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/* Find PM domains containing special blocks */
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get_special_pds();
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scanned = true;
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}
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ret = rmobile_add_pm_domains(base, pmd, NULL);
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of_node_put(pmd);
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if (ret) {
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of_node_put(np);
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break;
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}
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}
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put_special_pds();
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return ret;
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}
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core_initcall(rmobile_init_pm_domains);
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