From: "Andreas Färber" <afaerber@suse.de>
To: linux-arm-kernel@lists.infradead.org
Cc: mp-cs@actions-semi.com,
"Thomas Liau" <thomas.liau@actions-semi.com>,
张东风 <zhangdf@actions-semi.com>, 刘炜 <liuwei@actions-semi.com>,
张天益 <tyzhang@actions-semi.com>,
96boards@ucrobotics.com, support@lemaker.org,
linux-kernel@vger.kernel.org, "Andreas Färber" <afaerber@suse.de>
Subject: [PATCH v5 21/26] soc: actions: Add Owl SPS
Date: Mon, 19 Jun 2017 05:40:21 +0200 [thread overview]
Message-ID: <20170619034021.5762-1-afaerber@suse.de> (raw)
In-Reply-To: <20170606005426.26446-24-afaerber@suse.de>
Implement S500 Smart Power System power-gating.
For now flag PD_CPU2 and PD_CPU3 as always-on.
Based on LeMaker linux-actions tree.
Signed-off-by: Andreas Färber <afaerber@suse.de>
---
v4 -> v5:
* Updated for header file rename
v3 -> v4:
* Added genpd_flags field and set GENPD_FLAG_ALWAYS_ON for CPU2/CPU3
* Added debug output
v3: new
drivers/soc/Kconfig | 1 +
drivers/soc/Makefile | 1 +
drivers/soc/actions/Kconfig | 12 ++
drivers/soc/actions/Makefile | 1 +
drivers/soc/actions/owl-sps.c | 252 ++++++++++++++++++++++++++++++++++++++++++
5 files changed, 267 insertions(+)
create mode 100644 drivers/soc/actions/Kconfig
create mode 100644 drivers/soc/actions/Makefile
create mode 100644 drivers/soc/actions/owl-sps.c
diff --git a/drivers/soc/Kconfig b/drivers/soc/Kconfig
index f8c0286f8a65..07fc0ac51c52 100644
--- a/drivers/soc/Kconfig
+++ b/drivers/soc/Kconfig
@@ -1,5 +1,6 @@
menu "SOC (System On Chip) specific Drivers"
+source "drivers/soc/actions/Kconfig"
source "drivers/soc/atmel/Kconfig"
source "drivers/soc/bcm/Kconfig"
source "drivers/soc/fsl/Kconfig"
diff --git a/drivers/soc/Makefile b/drivers/soc/Makefile
index c0b2a610efcd..9241125416ba 100644
--- a/drivers/soc/Makefile
+++ b/drivers/soc/Makefile
@@ -2,6 +2,7 @@
# Makefile for the Linux Kernel SOC specific device drivers.
#
+obj-$(CONFIG_ARCH_ACTIONS) += actions/
obj-$(CONFIG_ARCH_AT91) += atmel/
obj-y += bcm/
obj-$(CONFIG_ARCH_DOVE) += dove/
diff --git a/drivers/soc/actions/Kconfig b/drivers/soc/actions/Kconfig
new file mode 100644
index 000000000000..bdf827d5ce78
--- /dev/null
+++ b/drivers/soc/actions/Kconfig
@@ -0,0 +1,12 @@
+if ARCH_ACTIONS || COMPILE_TEST
+
+config OWL_PM_DOMAINS
+ bool "Actions Semi SPS power domains"
+ depends on PM
+ select PM_GENERIC_DOMAINS
+ help
+ Say 'y' here to enable support for Smart Power System (SPS)
+ power-gating on Actions Semiconductor S500 SoC.
+ If unsure, say 'n'.
+
+endif
diff --git a/drivers/soc/actions/Makefile b/drivers/soc/actions/Makefile
new file mode 100644
index 000000000000..720c34ed16e4
--- /dev/null
+++ b/drivers/soc/actions/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_OWL_PM_DOMAINS) += owl-sps.o
diff --git a/drivers/soc/actions/owl-sps.c b/drivers/soc/actions/owl-sps.c
new file mode 100644
index 000000000000..8abb72f01929
--- /dev/null
+++ b/drivers/soc/actions/owl-sps.c
@@ -0,0 +1,252 @@
+/*
+ * Actions Semi Owl Smart Power System (SPS)
+ *
+ * Copyright 2012 Actions Semi Inc.
+ * Author: Actions Semi, Inc.
+ *
+ * Copyright (c) 2017 Andreas Färber
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/pm_domain.h>
+#include <dt-bindings/power/owl-s500-powergate.h>
+
+#define OWL_SPS_PG_CTL 0x0
+
+struct owl_sps_domain_info {
+ const char *name;
+ int pwr_bit;
+ int ack_bit;
+ unsigned int genpd_flags;
+};
+
+struct owl_sps_info {
+ unsigned num_domains;
+ const struct owl_sps_domain_info *domains;
+};
+
+struct owl_sps {
+ struct device *dev;
+ const struct owl_sps_info *info;
+ void __iomem *base;
+ struct genpd_onecell_data genpd_data;
+ struct generic_pm_domain *domains[];
+};
+
+#define to_owl_pd(gpd) container_of(gpd, struct owl_sps_domain, genpd)
+
+struct owl_sps_domain {
+ struct generic_pm_domain genpd;
+ const struct owl_sps_domain_info *info;
+ struct owl_sps *sps;
+};
+
+static int owl_sps_set_power(struct owl_sps_domain *pd, bool enable)
+{
+ u32 val, pwr_mask, ack_mask;
+ int timeout;
+ bool ack;
+
+ ack_mask = BIT(pd->info->ack_bit);
+ pwr_mask = BIT(pd->info->pwr_bit);
+ val = readl(pd->sps->base + OWL_SPS_PG_CTL);
+ ack = val & ack_mask;
+
+ if (ack == enable)
+ return 0;
+
+ if (enable)
+ val |= pwr_mask;
+ else
+ val &= ~pwr_mask;
+
+ writel(val, pd->sps->base + OWL_SPS_PG_CTL);
+
+ for (timeout = 5000; timeout > 0; timeout -= 50) {
+ val = readl(pd->sps->base + OWL_SPS_PG_CTL);
+ if ((val & ack_mask) == (enable ? ack_mask : 0))
+ break;
+ udelay(50);
+ }
+ if (timeout <= 0)
+ return -ETIMEDOUT;
+
+ udelay(10);
+
+ return 0;
+}
+
+static int owl_sps_power_on(struct generic_pm_domain *domain)
+{
+ struct owl_sps_domain *pd = to_owl_pd(domain);
+
+ dev_dbg(pd->sps->dev, "%s power on", pd->info->name);
+
+ return owl_sps_set_power(pd, true);
+}
+
+static int owl_sps_power_off(struct generic_pm_domain *domain)
+{
+ struct owl_sps_domain *pd = to_owl_pd(domain);
+
+ dev_dbg(pd->sps->dev, "%s power off", pd->info->name);
+
+ return owl_sps_set_power(pd, false);
+}
+
+static int owl_sps_init_domain(struct owl_sps *sps, int index)
+{
+ struct owl_sps_domain *pd;
+
+ pd = devm_kzalloc(sps->dev, sizeof(*pd), GFP_KERNEL);
+ if (!pd)
+ return -ENOMEM;
+
+ pd->info = &sps->info->domains[index];
+ pd->sps = sps;
+
+ pd->genpd.name = pd->info->name;
+ pd->genpd.power_on = owl_sps_power_on;
+ pd->genpd.power_off = owl_sps_power_off;
+ pd->genpd.flags = pd->info->genpd_flags;
+ pm_genpd_init(&pd->genpd, NULL, false);
+
+ sps->genpd_data.domains[index] = &pd->genpd;
+
+ return 0;
+}
+
+static int owl_sps_probe(struct platform_device *pdev)
+{
+ const struct of_device_id *match;
+ const struct owl_sps_info *sps_info;
+ struct owl_sps *sps;
+ int i, ret;
+
+ if (!pdev->dev.of_node) {
+ dev_err(&pdev->dev, "no device node\n");
+ return -ENODEV;
+ }
+
+ match = of_match_device(pdev->dev.driver->of_match_table, &pdev->dev);
+ if (!match || !match->data) {
+ dev_err(&pdev->dev, "unknown compatible or missing data\n");
+ return -EINVAL;
+ }
+
+ sps_info = match->data;
+
+ sps = devm_kzalloc(&pdev->dev, sizeof(*sps) +
+ sps_info->num_domains * sizeof(sps->domains[0]),
+ GFP_KERNEL);
+ if (!sps)
+ return -ENOMEM;
+
+ sps->base = of_io_request_and_map(pdev->dev.of_node, 0, "owl-sps");
+ if (IS_ERR(sps->base)) {
+ dev_err(&pdev->dev, "failed to map sps registers\n");
+ return PTR_ERR(sps->base);
+ }
+
+ sps->dev = &pdev->dev;
+ sps->info = sps_info;
+ sps->genpd_data.domains = sps->domains;
+ sps->genpd_data.num_domains = sps_info->num_domains;
+
+ for (i = 0; i < sps_info->num_domains; i++) {
+ ret = owl_sps_init_domain(sps, i);
+ if (ret)
+ return ret;
+ }
+
+ ret = of_genpd_add_provider_onecell(pdev->dev.of_node, &sps->genpd_data);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to add provider (%d)", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct owl_sps_domain_info s500_sps_domains[] = {
+ [S500_PD_VDE] = {
+ .name = "VDE",
+ .pwr_bit = 0,
+ .ack_bit = 16,
+ },
+ [S500_PD_VCE_SI] = {
+ .name = "VCE_SI",
+ .pwr_bit = 1,
+ .ack_bit = 17,
+ },
+ [S500_PD_USB2_1] = {
+ .name = "USB2_1",
+ .pwr_bit = 2,
+ .ack_bit = 18,
+ },
+ [S500_PD_CPU2] = {
+ .name = "CPU2",
+ .pwr_bit = 5,
+ .ack_bit = 21,
+ .genpd_flags = GENPD_FLAG_ALWAYS_ON,
+ },
+ [S500_PD_CPU3] = {
+ .name = "CPU3",
+ .pwr_bit = 6,
+ .ack_bit = 22,
+ .genpd_flags = GENPD_FLAG_ALWAYS_ON,
+ },
+ [S500_PD_DMA] = {
+ .name = "DMA",
+ .pwr_bit = 8,
+ .ack_bit = 12,
+ },
+ [S500_PD_DS] = {
+ .name = "DS",
+ .pwr_bit = 9,
+ .ack_bit = 13,
+ },
+ [S500_PD_USB3] = {
+ .name = "USB3",
+ .pwr_bit = 10,
+ .ack_bit = 14,
+ },
+ [S500_PD_USB2_0] = {
+ .name = "USB2_0",
+ .pwr_bit = 11,
+ .ack_bit = 15,
+ },
+};
+
+static const struct owl_sps_info s500_sps_info = {
+ .num_domains = ARRAY_SIZE(s500_sps_domains),
+ .domains = s500_sps_domains,
+};
+
+static const struct of_device_id owl_sps_of_matches[] = {
+ { .compatible = "actions,s500-sps", .data = &s500_sps_info },
+ { }
+};
+
+static struct platform_driver owl_sps_platform_driver = {
+ .probe = owl_sps_probe,
+ .driver = {
+ .name = "owl-sps",
+ .of_match_table = owl_sps_of_matches,
+ .suppress_bind_attrs = true,
+ },
+};
+
+static int __init owl_sps_init(void)
+{
+ return platform_driver_register(&owl_sps_platform_driver);
+}
+postcore_initcall(owl_sps_init);
--
2.12.3
next prev parent reply other threads:[~2017-06-19 3:40 UTC|newest]
Thread overview: 99+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-06 0:53 [PATCH v4 00/28] ARM: Initial Actions Semi S500 and S900 enablement Andreas Färber
2017-06-06 0:53 ` [PATCH v4 01/28] dt-bindings: Add vendor prefix for Actions Semi Andreas Färber
2017-06-18 18:46 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 02/28] dt-bindings: arm: Document Actions Semi S500 Andreas Färber
2017-06-18 18:48 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 03/28] dt-bindings: timer: Document Owl timer Andreas Färber
2017-06-18 20:18 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 04/28] clocksource: Add " Andreas Färber
2017-06-06 16:33 ` Daniel Lezcano
2017-06-18 20:43 ` Andreas Färber
2017-06-19 13:53 ` Daniel Lezcano
2017-06-19 14:31 ` Andreas Färber
2017-06-21 11:57 ` Daniel Lezcano
2017-06-06 0:54 ` [PATCH v4 05/28] clocksource: owl: Add S900 support Andreas Färber
2017-06-06 16:34 ` Daniel Lezcano
2017-06-18 20:50 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 06/28] ARM: Prepare Actions Semi S500 Andreas Färber
2017-06-18 21:21 ` Andreas Färber
2017-07-01 21:41 ` [PATCH] ARM: owl: Drop custom machine Andreas Färber
2017-06-06 0:54 ` [PATCH v4 07/28] ARM64: Prepare Actions Semi S900 Andreas Färber
2017-06-11 13:04 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 08/28] dt-bindings: serial: Document Actions Semi Owl UARTs Andreas Färber
2017-06-06 0:54 ` [PATCH v4 09/28] tty: serial: Add Actions Semi Owl UART earlycon Andreas Färber
2017-06-18 21:45 ` Andreas Färber
2017-06-19 1:16 ` Greg Kroah-Hartman
2017-06-19 1:24 ` Andreas Färber
2017-06-19 1:46 ` [PATCH v5 07/26] dt-bindings: serial: Document Actions Semi Owl UARTs Andreas Färber
2017-06-19 1:46 ` [PATCH v5 08/26] tty: serial: Add Actions Semi Owl UART earlycon Andreas Färber
2017-06-19 2:12 ` [PATCH v4 09/28] " Greg Kroah-Hartman
2017-06-19 2:26 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 10/28] Documentation: kernel-parameters: Document owl earlycon Andreas Färber
2017-06-06 0:54 ` [PATCH v4 11/28] ARM: dts: Add Actions Semi S500 and LeMaker Guitar Andreas Färber
2017-06-18 22:10 ` Andreas Färber
2017-06-19 1:08 ` [PATCH v5 10/27] " Andreas Färber
2017-06-19 2:01 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 12/28] dt-bindings: Add vendor prefix for uCRobotics Andreas Färber
2017-06-18 22:19 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 13/28] dt-bindings: arm: Document Actions Semi S900 Andreas Färber
2017-06-18 22:29 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 14/28] ARM64: dts: Add Actions Semi S900 and Bubblegum-96 Andreas Färber
2017-06-18 22:40 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 15/28] MAINTAINERS: Add Actions Semi Owl section Andreas Färber
2017-06-18 22:49 ` Andreas Färber
2017-06-19 2:44 ` [PATCH v5 13/26] " Andreas Färber
2017-06-26 6:56 ` 答复: " 张天益
2017-06-06 0:54 ` [PATCH v4 16/28] tty: serial: owl: Implement console driver Andreas Färber
2017-06-06 13:34 ` Alan Cox
2017-07-02 20:27 ` Andreas Färber
2017-06-07 14:37 ` Andy Shevchenko
2017-07-02 22:36 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 17/28] ARM64: dts: actions: s900-bubblegum-96: Add fake uart5 clock Andreas Färber
2017-09-05 21:29 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 18/28] ARM: dts: s500-guitar-bb-rev-b: Add fake uart3 clock Andreas Färber
2017-09-05 21:37 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 19/28] dt-bindings: arm: cpus: Add S500 enable-method Andreas Färber
2017-06-19 2:09 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 20/28] ARM: owl: Implement CPU enable-method for S500 Andreas Färber
2017-06-19 2:11 ` Andreas Färber
2017-06-21 8:16 ` Arnd Bergmann
2017-06-21 10:25 ` Arnd Bergmann
2017-06-21 16:48 ` Andreas Färber
2017-06-21 18:02 ` Arnd Bergmann
2017-06-29 15:07 ` Arnd Bergmann
2017-06-29 15:22 ` Andreas Färber
2017-06-29 15:50 ` Arnd Bergmann
2017-07-01 21:29 ` [PATCH] ARM: owl: smp: Drop bogus holding pen Andreas Färber
2017-07-03 12:35 ` Arnd Bergmann
2017-07-01 4:42 ` 答复: [PATCH v4 20/28] ARM: owl: Implement CPU enable-method for S500 刘炜
2017-07-01 19:56 ` Andreas Färber
2017-07-03 8:13 ` 刘炜
2017-07-04 23:32 ` [PATCH] ARM: owl: smp: Drop owl_secondary_boot() Andreas Färber
2017-07-05 2:36 ` Florian Fainelli
2017-07-06 17:17 ` Andreas Färber
2017-07-06 17:38 ` Alexandre Belloni
2017-07-06 19:47 ` Florian Fainelli
2017-07-07 7:34 ` Gregory CLEMENT
2017-07-07 17:32 ` Florian Fainelli
2017-07-06 17:39 ` Mark Rutland
2017-07-06 21:16 ` Florian Fainelli
2017-07-09 21:55 ` Andreas Färber
2017-07-10 4:27 ` Florian Fainelli
2017-06-06 0:54 ` [PATCH v4 21/28] ARM: dts: s500: Set CPU enable-method Andreas Färber
2017-06-19 2:09 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 22/28] dt-bindings: power: Add Owl SPS power domains Andreas Färber
2017-06-19 3:36 ` [PATCH v5 20/26] " Andreas Färber
2017-06-19 3:57 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 23/28] soc: actions: Add Owl SPS Andreas Färber
2017-06-19 3:40 ` Andreas Färber [this message]
2017-06-19 3:59 ` [PATCH v5 21/26] " Andreas Färber
2017-06-06 0:54 ` [PATCH v4 24/28] MAINTAINERS: Update Actions Semi section with SPS Andreas Färber
2017-06-19 3:44 ` [PATCH v5 22/26] " Andreas Färber
2017-06-19 4:00 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 25/28] ARM: dts: s500: Add SPS node Andreas Färber
2017-06-19 4:01 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 26/28] ARM: dts: s500: Set power domains for CPU2 and CPU3 Andreas Färber
2017-07-27 20:58 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 27/28] soc: actions: owl-sps: Factor out owl_sps_set_pg() for power-gating Andreas Färber
2017-06-19 4:12 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 28/28] ARM: owl: smp: Implement SPS power-gating for CPU2 and CPU3 Andreas Färber
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