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-rw-r--r--arch/arm/mach-zx/Kconfig1
-rw-r--r--arch/arm/mach-zx/Makefile2
-rw-r--r--arch/arm/mach-zx/zx296702-pm-domain.c202
-rw-r--r--arch/arm/mach-zx/zx296702.c2
4 files changed, 205 insertions, 2 deletions
diff --git a/arch/arm/mach-zx/Kconfig b/arch/arm/mach-zx/Kconfig
index 2a910dc0d..7fdc5bf24 100644
--- a/arch/arm/mach-zx/Kconfig
+++ b/arch/arm/mach-zx/Kconfig
@@ -13,6 +13,7 @@ config SOC_ZX296702
select ARM_GLOBAL_TIMER
select HAVE_ARM_SCU if SMP
select HAVE_ARM_TWD if SMP
+ select PM_GENERIC_DOMAINS
help
Support for ZTE ZX296702 SoC which is a dual core CortexA9MP
endif
diff --git a/arch/arm/mach-zx/Makefile b/arch/arm/mach-zx/Makefile
index 7c2edf6e5..a4b486433 100644
--- a/arch/arm/mach-zx/Makefile
+++ b/arch/arm/mach-zx/Makefile
@@ -1,2 +1,2 @@
-obj-$(CONFIG_SOC_ZX296702) += zx296702.o
+obj-$(CONFIG_SOC_ZX296702) += zx296702.o zx296702-pm-domain.o
obj-$(CONFIG_SMP) += headsmp.o platsmp.o
diff --git a/arch/arm/mach-zx/zx296702-pm-domain.c b/arch/arm/mach-zx/zx296702-pm-domain.c
new file mode 100644
index 000000000..e08574d4e
--- /dev/null
+++ b/arch/arm/mach-zx/zx296702-pm-domain.c
@@ -0,0 +1,202 @@
+/*
+ * Copyright (C) 2015 Linaro Ltd.
+ *
+ * Author: Jun Nie <jun.nie@linaro.org>
+ * License terms: GNU General Public License (GPL) version 2
+ */
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
+#include <linux/slab.h>
+
+#define PCU_DM_CLKEN 0x18
+#define PCU_DM_RSTEN 0x1C
+#define PCU_DM_ISOEN 0x20
+#define PCU_DM_PWRDN 0x24
+#define PCU_DM_ACK_SYNC 0x28
+
+enum {
+ PCU_DM_NEON0 = 0,
+ PCU_DM_NEON1,
+ PCU_DM_GPU,
+ PCU_DM_DECPPU,
+ PCU_DM_VOU,
+ PCU_DM_R2D,
+ PCU_DM_TOP,
+};
+
+static void __iomem *pcubase;
+
+struct zx_pm_domain {
+ struct generic_pm_domain dm;
+ unsigned int bit;
+};
+
+static int normal_power_off(struct generic_pm_domain *domain)
+{
+ struct zx_pm_domain *zpd = (struct zx_pm_domain *)domain;
+ unsigned long loop = 1000;
+ u32 tmp;
+
+ tmp = readl_relaxed(pcubase + PCU_DM_CLKEN);
+ tmp &= ~BIT(zpd->bit);
+ writel_relaxed(tmp, pcubase + PCU_DM_CLKEN);
+ udelay(5);
+
+ tmp = readl_relaxed(pcubase + PCU_DM_ISOEN);
+ tmp &= ~BIT(zpd->bit);
+ writel_relaxed(tmp | BIT(zpd->bit), pcubase + PCU_DM_ISOEN);
+ udelay(5);
+
+ tmp = readl_relaxed(pcubase + PCU_DM_RSTEN);
+ tmp &= ~BIT(zpd->bit);
+ writel_relaxed(tmp, pcubase + PCU_DM_RSTEN);
+ udelay(5);
+
+ tmp = readl_relaxed(pcubase + PCU_DM_PWRDN);
+ tmp &= ~BIT(zpd->bit);
+ writel_relaxed(tmp | BIT(zpd->bit), pcubase + PCU_DM_PWRDN);
+ do {
+ tmp = readl_relaxed(pcubase + PCU_DM_ACK_SYNC) & BIT(zpd->bit);
+ } while (--loop && !tmp);
+
+ if (!loop) {
+ pr_err("Error: %s %s fail\n", __func__, domain->name);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int normal_power_on(struct generic_pm_domain *domain)
+{
+ struct zx_pm_domain *zpd = (struct zx_pm_domain *)domain;
+ unsigned long loop = 10000;
+ u32 tmp;
+
+ tmp = readl_relaxed(pcubase + PCU_DM_PWRDN);
+ tmp &= ~BIT(zpd->bit);
+ writel_relaxed(tmp, pcubase + PCU_DM_PWRDN);
+ do {
+ tmp = readl_relaxed(pcubase + PCU_DM_ACK_SYNC) & BIT(zpd->bit);
+ } while (--loop && tmp);
+
+ if (!loop) {
+ pr_err("Error: %s %s fail\n", __func__, domain->name);
+ return -EIO;
+ }
+
+ tmp = readl_relaxed(pcubase + PCU_DM_RSTEN);
+ tmp &= ~BIT(zpd->bit);
+ writel_relaxed(tmp | BIT(zpd->bit), pcubase + PCU_DM_RSTEN);
+ udelay(5);
+
+ tmp = readl_relaxed(pcubase + PCU_DM_ISOEN);
+ tmp &= ~BIT(zpd->bit);
+ writel_relaxed(tmp, pcubase + PCU_DM_ISOEN);
+ udelay(5);
+
+ tmp = readl_relaxed(pcubase + PCU_DM_CLKEN);
+ tmp &= ~BIT(zpd->bit);
+ writel_relaxed(tmp | BIT(zpd->bit), pcubase + PCU_DM_CLKEN);
+ udelay(5);
+ return 0;
+}
+
+static struct zx_pm_domain gpu_domain = {
+ .dm = {
+ .name = "gpu_domain",
+ .power_off = normal_power_off,
+ .power_on = normal_power_on,
+ },
+ .bit = PCU_DM_GPU,
+};
+
+static struct zx_pm_domain decppu_domain = {
+ .dm = {
+ .name = "decppu_domain",
+ .power_off = normal_power_off,
+ .power_on = normal_power_on,
+ },
+ .bit = PCU_DM_DECPPU,
+};
+
+static struct zx_pm_domain vou_domain = {
+ .dm = {
+ .name = "vou_domain",
+ .power_off = normal_power_off,
+ .power_on = normal_power_on,
+ },
+ .bit = PCU_DM_VOU,
+};
+
+static struct zx_pm_domain r2d_domain = {
+ .dm = {
+ .name = "r2d_domain",
+ .power_off = normal_power_off,
+ .power_on = normal_power_on,
+ },
+ .bit = PCU_DM_R2D,
+};
+
+static struct generic_pm_domain *zx296702_pm_domains[] = {
+ &vou_domain.dm,
+ &gpu_domain.dm,
+ &decppu_domain.dm,
+ &r2d_domain.dm,
+};
+
+static int zx296702_pd_probe(struct platform_device *pdev)
+{
+ struct genpd_onecell_data *genpd_data;
+ struct resource *res;
+ int i;
+
+ genpd_data = devm_kzalloc(&pdev->dev, sizeof(*genpd_data), GFP_KERNEL);
+ if (!genpd_data)
+ return -ENOMEM;
+
+ genpd_data->domains = zx296702_pm_domains;
+ genpd_data->num_domains = ARRAY_SIZE(zx296702_pm_domains);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "no memory resource defined\n");
+ return -ENODEV;
+ }
+
+ pcubase = devm_ioremap_resource(&pdev->dev, res);
+ if (!pcubase) {
+ dev_err(&pdev->dev, "ioremap fail.\n");
+ return -EIO;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(zx296702_pm_domains); ++i)
+ pm_genpd_init(zx296702_pm_domains[i], NULL, false);
+
+ of_genpd_add_provider_onecell(pdev->dev.of_node, genpd_data);
+ return 0;
+}
+
+static const struct of_device_id zx296702_pm_domain_matches[] __initconst = {
+ { .compatible = "zte,zx296702-pcu", },
+ { },
+};
+
+static struct platform_driver zx296702_pd_driver __initdata = {
+ .driver = {
+ .name = "zx-powerdomain",
+ .owner = THIS_MODULE,
+ .of_match_table = zx296702_pm_domain_matches,
+ },
+ .probe = zx296702_pd_probe,
+};
+
+static int __init zx296702_pd_init(void)
+{
+ return platform_driver_register(&zx296702_pd_driver);
+}
+subsys_initcall(zx296702_pd_init);
diff --git a/arch/arm/mach-zx/zx296702.c b/arch/arm/mach-zx/zx296702.c
index 60bb1a8e1..a041e13ab 100644
--- a/arch/arm/mach-zx/zx296702.c
+++ b/arch/arm/mach-zx/zx296702.c
@@ -13,7 +13,7 @@
#include <linux/of_address.h>
#include <linux/of_platform.h>
-static const char *zx296702_dt_compat[] __initconst = {
+static const char *const zx296702_dt_compat[] __initconst = {
"zte,zx296702",
NULL,
};
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-17 09:02:04 +0000