The ARMv8 2967 family (296718, 296716 etc) uses different value
for controlling the power domain on/off registers, Choose the
value depending on the compatible.
Multiple domains are prepared for the family, it's privated by
the drivers of boards.
This patch prepares the common functions.
Signed-off-by: Baoyou Xie <[email protected]>
---
MAINTAINERS | 1 +
drivers/soc/Kconfig | 1 +
drivers/soc/Makefile | 1 +
drivers/soc/zte/Kconfig | 13 ++++
drivers/soc/zte/Makefile | 4 ++
drivers/soc/zte/pm_domains.c | 138 +++++++++++++++++++++++++++++++++++++++++++
drivers/soc/zte/pm_domains.h | 29 +++++++++
7 files changed, 187 insertions(+)
create mode 100644 drivers/soc/zte/Kconfig
create mode 100644 drivers/soc/zte/Makefile
create mode 100644 drivers/soc/zte/pm_domains.c
create mode 100644 drivers/soc/zte/pm_domains.h
diff --git a/MAINTAINERS b/MAINTAINERS
index ad199da..8198389 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1979,6 +1979,7 @@ L: [email protected] (moderated for non-subscribers)
S: Maintained
F: arch/arm/mach-zx/
F: drivers/clk/zte/
+F: drivers/soc/zte/
F: Documentation/devicetree/bindings/arm/zte.txt
F: Documentation/devicetree/bindings/clock/zx296702-clk.txt
diff --git a/drivers/soc/Kconfig b/drivers/soc/Kconfig
index f31bceb..f09023f 100644
--- a/drivers/soc/Kconfig
+++ b/drivers/soc/Kconfig
@@ -11,5 +11,6 @@ source "drivers/soc/tegra/Kconfig"
source "drivers/soc/ti/Kconfig"
source "drivers/soc/ux500/Kconfig"
source "drivers/soc/versatile/Kconfig"
+source "drivers/soc/zte/Kconfig"
endmenu
diff --git a/drivers/soc/Makefile b/drivers/soc/Makefile
index 50c23d0..05eae52 100644
--- a/drivers/soc/Makefile
+++ b/drivers/soc/Makefile
@@ -16,3 +16,4 @@ obj-$(CONFIG_ARCH_TEGRA) += tegra/
obj-$(CONFIG_SOC_TI) += ti/
obj-$(CONFIG_ARCH_U8500) += ux500/
obj-$(CONFIG_PLAT_VERSATILE) += versatile/
+obj-$(CONFIG_ARCH_ZX) += zte/
diff --git a/drivers/soc/zte/Kconfig b/drivers/soc/zte/Kconfig
new file mode 100644
index 0000000..4953c3fa
--- /dev/null
+++ b/drivers/soc/zte/Kconfig
@@ -0,0 +1,13 @@
+#
+# zx SoC drivers
+#
+menuconfig SOC_ZX
+ bool "zx SoC driver support"
+
+if SOC_ZX
+
+config ZX_PM_DOMAINS
+ bool "zx PM domains"
+ depends on PM_GENERIC_DOMAINS
+
+endif
diff --git a/drivers/soc/zte/Makefile b/drivers/soc/zte/Makefile
new file mode 100644
index 0000000..97ac8ea
--- /dev/null
+++ b/drivers/soc/zte/Makefile
@@ -0,0 +1,4 @@
+#
+# zx SOC drivers
+#
+obj-$(CONFIG_ZX_PM_DOMAINS) += pm_domains.o
diff --git a/drivers/soc/zte/pm_domains.c b/drivers/soc/zte/pm_domains.c
new file mode 100644
index 0000000..5792f21
--- /dev/null
+++ b/drivers/soc/zte/pm_domains.c
@@ -0,0 +1,138 @@
+/*
+ * Copyright (C) 2015 ZTE Ltd.
+ *
+ * Author: Baoyou Xie <[email protected]>
+ * 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 "pm_domains.h"
+
+#define PCU_DM_CLKEN 0x18
+#define PCU_DM_RSTEN 0x20
+#define PCU_DM_ISOEN 0x1c
+#define PCU_DM_PWREN 0x24
+#define PCU_DM_ACK_SYNC 0x28
+
+static void __iomem *pcubase;
+
+int zx_normal_power_on(struct generic_pm_domain *domain)
+{
+ struct zx_pm_domain *zpd = (struct zx_pm_domain *)domain;
+ unsigned long loop = 20000;
+ u32 val;
+
+ loop = 1000;
+ do {
+ val = readl_relaxed(pcubase + PCU_DM_PWREN);
+ val |= BIT(zpd->bit);
+ writel_relaxed(val, pcubase + PCU_DM_PWREN);
+
+ udelay(1);
+ val = readl_relaxed(pcubase + PCU_DM_ACK_SYNC) & BIT(zpd->bit);
+ } while (--loop && !val);
+
+ if (!loop) {
+ pr_err("Error: %s %s fail\n", __func__, domain->name);
+ return -EIO;
+ }
+
+ val = readl_relaxed(pcubase + PCU_DM_RSTEN);
+ val &= ~BIT(zpd->bit);
+ writel_relaxed(val | BIT(zpd->bit), pcubase + PCU_DM_RSTEN);
+ udelay(5);
+
+ val = readl_relaxed(pcubase + PCU_DM_ISOEN);
+ val &= ~BIT(zpd->bit);
+ writel_relaxed(val, pcubase + PCU_DM_ISOEN);
+ udelay(5);
+
+ val = readl_relaxed(pcubase + PCU_DM_CLKEN);
+ val &= ~BIT(zpd->bit);
+ writel_relaxed(val | BIT(zpd->bit), pcubase + PCU_DM_CLKEN);
+ udelay(5);
+
+ pr_info("normal poweron %s\n", domain->name);
+
+ return 0;
+}
+
+int zx_normal_power_off(struct generic_pm_domain *domain)
+{
+ struct zx_pm_domain *zpd = (struct zx_pm_domain *)domain;
+ unsigned long loop = 1000;
+ u32 val;
+
+ val = readl_relaxed(pcubase + PCU_DM_CLKEN);
+ val &= ~BIT(zpd->bit);
+ writel_relaxed(val, pcubase + PCU_DM_CLKEN);
+ udelay(5);
+
+ val = readl_relaxed(pcubase + PCU_DM_ISOEN);
+ val &= ~BIT(zpd->bit);
+ writel_relaxed(val | BIT(zpd->bit), pcubase + PCU_DM_ISOEN);
+ udelay(5);
+
+ val = readl_relaxed(pcubase + PCU_DM_RSTEN);
+ val &= ~BIT(zpd->bit);
+ writel_relaxed(val, pcubase + PCU_DM_RSTEN);
+ udelay(5);
+
+ loop = 1000;
+ do {
+ val = readl_relaxed(pcubase + PCU_DM_PWREN);
+ val &= ~BIT(zpd->bit);
+ writel_relaxed(val, pcubase + PCU_DM_PWREN);
+
+ udelay(1);
+
+ val = readl_relaxed(pcubase + PCU_DM_ACK_SYNC) & BIT(zpd->bit);
+ } while (--loop && val);
+
+ if (!loop) {
+ pr_err("Error: %s %s fail\n", __func__, domain->name);
+ return -EIO;
+ }
+
+ pr_info("normal poweroff %s\n", domain->name);
+
+ return 0;
+}
+
+int
+zx_pd_probe(struct platform_device *pdev,
+ struct generic_pm_domain **zx_pm_domains,
+ int domain_num)
+{
+ 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 = zx_pm_domains;
+ genpd_data->num_domains = domain_num;
+
+ 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 < domain_num; ++i)
+ pm_genpd_init(zx_pm_domains[i], NULL, false);
+
+ of_genpd_add_provider_onecell(pdev->dev.of_node, genpd_data);
+ dev_info(&pdev->dev, "powerdomain init ok\n");
+ return 0;
+}
diff --git a/drivers/soc/zte/pm_domains.h b/drivers/soc/zte/pm_domains.h
new file mode 100644
index 0000000..613e0be
--- /dev/null
+++ b/drivers/soc/zte/pm_domains.h
@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2015 ZTE Co., Ltd.
+ * http://www.zte.com.cn
+ *
+ * Header for ZTE's Power Domain Driver support
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __ZTE_PM_DOMAIN_H
+#define __ZTE_PM_DOMAIN_H
+
+#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
+
+struct zx_pm_domain {
+ struct generic_pm_domain dm;
+ unsigned int bit;
+};
+
+extern int zx_normal_power_on(struct generic_pm_domain *domain);
+extern int zx_normal_power_off(struct generic_pm_domain *domain);
+extern int
+zx_pd_probe(struct platform_device *pdev,
+ struct generic_pm_domain **zx_pm_domains,
+ int domain_num);
+#endif /* __ZTE_PM_DOMAIN_H */
--
2.7.4
This patch introduces the power domain driver of zx296718
which belongs to zte's 2967 family.
Signed-off-by: Baoyou Xie <[email protected]>
---
drivers/soc/zte/Makefile | 3 +
drivers/soc/zte/zx296718_pm_domains.c | 162 ++++++++++++++++++++++++++++++++++
2 files changed, 165 insertions(+)
create mode 100644 drivers/soc/zte/zx296718_pm_domains.c
diff --git a/drivers/soc/zte/Makefile b/drivers/soc/zte/Makefile
index 97ac8ea..a6e7bfe 100644
--- a/drivers/soc/zte/Makefile
+++ b/drivers/soc/zte/Makefile
@@ -2,3 +2,6 @@
# zx SOC drivers
#
obj-$(CONFIG_ZX_PM_DOMAINS) += pm_domains.o
+ifeq ($(CONFIG_ZX_PM_DOMAINS), y)
+ obj-y += zx296718_pm_domains.o
+endif
diff --git a/drivers/soc/zte/zx296718_pm_domains.c b/drivers/soc/zte/zx296718_pm_domains.c
new file mode 100644
index 0000000..fc16dfd
--- /dev/null
+++ b/drivers/soc/zte/zx296718_pm_domains.c
@@ -0,0 +1,162 @@
+/*
+ * Copyright (C) 2015 ZTE Ltd.
+ *
+ * Author: Baoyou Xie <[email protected]>
+ * License terms: GNU General Public License (GPL) version 2
+ */
+#include "pm_domains.h"
+
+enum {
+ PCU_DM_VOU = 0,
+ PCU_DM_SAPPU,
+ PCU_DM_VDE,
+ PCU_DM_VCE,
+ PCU_DM_HDE,
+ PCU_DM_VIU,
+ PCU_DM_USB20,
+ PCU_DM_USB21,
+ PCU_DM_USB30,
+ PCU_DM_HSIC,
+ PCU_DM_GMAC,
+ PCU_DM_TS,
+};
+
+static struct zx_pm_domain vou_domain = {
+ .dm = {
+ .name = "vou_domain",
+ .power_off = zx_normal_power_off,
+ .power_on = zx_normal_power_on,
+ },
+ .bit = PCU_DM_VOU,
+};
+static struct zx_pm_domain sappu_domain = {
+ .dm = {
+ .name = "sappu_domain",
+ .power_off = zx_normal_power_off,
+ .power_on = zx_normal_power_on,
+ },
+ .bit = PCU_DM_SAPPU,
+};
+static struct zx_pm_domain vde_domain = {
+ .dm = {
+ .name = "vde_domain",
+ .power_off = zx_normal_power_off,
+ .power_on = zx_normal_power_on,
+ },
+ .bit = PCU_DM_VDE,
+};
+static struct zx_pm_domain vce_domain = {
+ .dm = {
+ .name = "vce_domain",
+ .power_off = zx_normal_power_off,
+ .power_on = zx_normal_power_on,
+ },
+ .bit = PCU_DM_VCE,
+};
+static struct zx_pm_domain hde_domain = {
+ .dm = {
+ .name = "hde_domain",
+ .power_off = zx_normal_power_off,
+ .power_on = zx_normal_power_on,
+ },
+ .bit = PCU_DM_HDE,
+};
+
+static struct zx_pm_domain viu_domain = {
+ .dm = {
+ .name = "viu_domain",
+ .power_off = zx_normal_power_off,
+ .power_on = zx_normal_power_on,
+ },
+ .bit = PCU_DM_VIU,
+};
+static struct zx_pm_domain usb20_domain = {
+ .dm = {
+ .name = "usb20_domain",
+ .power_off = zx_normal_power_off,
+ .power_on = zx_normal_power_on,
+ },
+ .bit = PCU_DM_USB20,
+};
+static struct zx_pm_domain usb21_domain = {
+ .dm = {
+ .name = "usb21_domain",
+ .power_off = zx_normal_power_off,
+ .power_on = zx_normal_power_on,
+ },
+ .bit = PCU_DM_USB21,
+};
+static struct zx_pm_domain usb30_domain = {
+ .dm = {
+ .name = "usb30_domain",
+ .power_off = zx_normal_power_off,
+ .power_on = zx_normal_power_on,
+ },
+ .bit = PCU_DM_USB30,
+};
+static struct zx_pm_domain hsic_domain = {
+ .dm = {
+ .name = "hsic_domain",
+ .power_off = zx_normal_power_off,
+ .power_on = zx_normal_power_on,
+ },
+ .bit = PCU_DM_HSIC,
+};
+static struct zx_pm_domain gmac_domain = {
+ .dm = {
+ .name = "gmac_domain",
+ .power_off = zx_normal_power_off,
+ .power_on = zx_normal_power_on,
+ },
+ .bit = PCU_DM_GMAC,
+};
+static struct zx_pm_domain ts_domain = {
+ .dm = {
+ .name = "ts_domain",
+ .power_off = zx_normal_power_off,
+ .power_on = zx_normal_power_on,
+ },
+ .bit = PCU_DM_TS,
+};
+struct generic_pm_domain *zx296718_pm_domains[] = {
+ //&vou_domain.dm,
+ &sappu_domain.dm,
+ &vde_domain.dm,
+ &vce_domain.dm,
+ &hde_domain.dm,
+ &viu_domain.dm,
+ &usb20_domain.dm,
+ &usb21_domain.dm,
+ &usb30_domain.dm,
+ &hsic_domain.dm,
+ &gmac_domain.dm,
+ &ts_domain.dm,
+ &vou_domain.dm,
+};
+
+static int zx296718_pd_probe(struct platform_device *pdev)
+{
+ return zx_pd_probe(pdev,
+ zx296718_pm_domains,
+ ARRAY_SIZE(zx296718_pm_domains));
+}
+
+static const struct of_device_id zx296718_pm_domain_matches[] = {
+ { .compatible = "zte,zx296718-pcu", },
+ { },
+};
+
+static struct platform_driver zx296718_pd_driver = {
+ .driver = {
+ .name = "zx-powerdomain",
+ .owner = THIS_MODULE,
+ .of_match_table = zx296718_pm_domain_matches,
+ },
+ .probe = zx296718_pd_probe,
+};
+
+static int __init zx296718_pd_init(void)
+{
+ return platform_driver_register(&zx296718_pd_driver);
+}
+subsys_initcall(zx296718_pd_init);
--
2.7.4
2016-12-03 22:11 GMT+08:00 Baoyou Xie <[email protected]>:
> The ARMv8 2967 family (296718, 296716 etc) uses different value
> for controlling the power domain on/off registers, Choose the
> value depending on the compatible.
>
> Multiple domains are prepared for the family, it's privated by
> the drivers of boards.
>
> This patch prepares the common functions.
>
> Signed-off-by: Baoyou Xie <[email protected]>
> ---
> MAINTAINERS | 1 +
> drivers/soc/Kconfig | 1 +
> drivers/soc/Makefile | 1 +
> drivers/soc/zte/Kconfig | 13 ++++
> drivers/soc/zte/Makefile | 4 ++
> drivers/soc/zte/pm_domains.c | 138 +++++++++++++++++++++++++++++++++++++++++++
> drivers/soc/zte/pm_domains.h | 29 +++++++++
> 7 files changed, 187 insertions(+)
> create mode 100644 drivers/soc/zte/Kconfig
> create mode 100644 drivers/soc/zte/Makefile
> create mode 100644 drivers/soc/zte/pm_domains.c
> create mode 100644 drivers/soc/zte/pm_domains.h
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index ad199da..8198389 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -1979,6 +1979,7 @@ L: [email protected] (moderated for non-subscribers)
> S: Maintained
> F: arch/arm/mach-zx/
> F: drivers/clk/zte/
> +F: drivers/soc/zte/
> F: Documentation/devicetree/bindings/arm/zte.txt
> F: Documentation/devicetree/bindings/clock/zx296702-clk.txt
>
> diff --git a/drivers/soc/Kconfig b/drivers/soc/Kconfig
> index f31bceb..f09023f 100644
> --- a/drivers/soc/Kconfig
> +++ b/drivers/soc/Kconfig
> @@ -11,5 +11,6 @@ source "drivers/soc/tegra/Kconfig"
> source "drivers/soc/ti/Kconfig"
> source "drivers/soc/ux500/Kconfig"
> source "drivers/soc/versatile/Kconfig"
> +source "drivers/soc/zte/Kconfig"
>
> endmenu
> diff --git a/drivers/soc/Makefile b/drivers/soc/Makefile
> index 50c23d0..05eae52 100644
> --- a/drivers/soc/Makefile
> +++ b/drivers/soc/Makefile
> @@ -16,3 +16,4 @@ obj-$(CONFIG_ARCH_TEGRA) += tegra/
> obj-$(CONFIG_SOC_TI) += ti/
> obj-$(CONFIG_ARCH_U8500) += ux500/
> obj-$(CONFIG_PLAT_VERSATILE) += versatile/
> +obj-$(CONFIG_ARCH_ZX) += zte/
> diff --git a/drivers/soc/zte/Kconfig b/drivers/soc/zte/Kconfig
> new file mode 100644
> index 0000000..4953c3fa
> --- /dev/null
> +++ b/drivers/soc/zte/Kconfig
> @@ -0,0 +1,13 @@
> +#
> +# zx SoC drivers
> +#
> +menuconfig SOC_ZX
> + bool "zx SoC driver support"
Why not reuse ARCH_ZX ?
> +
> +if SOC_ZX
> +
> +config ZX_PM_DOMAINS
> + bool "zx PM domains"
> + depends on PM_GENERIC_DOMAINS
> +
> +endif
> diff --git a/drivers/soc/zte/Makefile b/drivers/soc/zte/Makefile
> new file mode 100644
> index 0000000..97ac8ea
> --- /dev/null
> +++ b/drivers/soc/zte/Makefile
> @@ -0,0 +1,4 @@
> +#
> +# zx SOC drivers
> +#
> +obj-$(CONFIG_ZX_PM_DOMAINS) += pm_domains.o
> diff --git a/drivers/soc/zte/pm_domains.c b/drivers/soc/zte/pm_domains.c
> new file mode 100644
> index 0000000..5792f21
> --- /dev/null
> +++ b/drivers/soc/zte/pm_domains.c
> @@ -0,0 +1,138 @@
> +/*
> + * Copyright (C) 2015 ZTE Ltd.
> + *
> + * Author: Baoyou Xie <[email protected]>
> + * 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 "pm_domains.h"
> +
> +#define PCU_DM_CLKEN 0x18
> +#define PCU_DM_RSTEN 0x20
> +#define PCU_DM_ISOEN 0x1c
List registers with ascending sequence.
I find these registers offset is different with existing 296702
register offset. So I suggest to use offset table to resolve the
conflict so that this driver is extendable for more SoC with different
register offset if you want. You can reference
drivers/tty/serial/amba-pl011.c for register offset handling.
> +#define PCU_DM_PWREN 0x24
> +#define PCU_DM_ACK_SYNC 0x28
> +
> +static void __iomem *pcubase;
> +
> +int zx_normal_power_on(struct generic_pm_domain *domain)
> +{
> + struct zx_pm_domain *zpd = (struct zx_pm_domain *)domain;
> + unsigned long loop = 20000;
> + u32 val;
> +
> + loop = 1000;
> + do {
> + val = readl_relaxed(pcubase + PCU_DM_PWREN);
> + val |= BIT(zpd->bit);
bit polarity can also be configurable if you want support more SoCs
with different polarity setting.
> + writel_relaxed(val, pcubase + PCU_DM_PWREN);
> +
> + udelay(1);
> + val = readl_relaxed(pcubase + PCU_DM_ACK_SYNC) & BIT(zpd->bit);
> + } while (--loop && !val);
> +
> + if (!loop) {
> + pr_err("Error: %s %s fail\n", __func__, domain->name);
> + return -EIO;
> + }
> +
> + val = readl_relaxed(pcubase + PCU_DM_RSTEN);
> + val &= ~BIT(zpd->bit);
> + writel_relaxed(val | BIT(zpd->bit), pcubase + PCU_DM_RSTEN);
> + udelay(5);
> +
> + val = readl_relaxed(pcubase + PCU_DM_ISOEN);
> + val &= ~BIT(zpd->bit);
> + writel_relaxed(val, pcubase + PCU_DM_ISOEN);
> + udelay(5);
> +
> + val = readl_relaxed(pcubase + PCU_DM_CLKEN);
> + val &= ~BIT(zpd->bit);
> + writel_relaxed(val | BIT(zpd->bit), pcubase + PCU_DM_CLKEN);
> + udelay(5);
> +
> + pr_info("normal poweron %s\n", domain->name);
> +
> + return 0;
> +}
> +
> +int zx_normal_power_off(struct generic_pm_domain *domain)
> +{
> + struct zx_pm_domain *zpd = (struct zx_pm_domain *)domain;
> + unsigned long loop = 1000;
> + u32 val;
> +
> + val = readl_relaxed(pcubase + PCU_DM_CLKEN);
> + val &= ~BIT(zpd->bit);
> + writel_relaxed(val, pcubase + PCU_DM_CLKEN);
> + udelay(5);
> +
> + val = readl_relaxed(pcubase + PCU_DM_ISOEN);
> + val &= ~BIT(zpd->bit);
> + writel_relaxed(val | BIT(zpd->bit), pcubase + PCU_DM_ISOEN);
> + udelay(5);
> +
> + val = readl_relaxed(pcubase + PCU_DM_RSTEN);
> + val &= ~BIT(zpd->bit);
> + writel_relaxed(val, pcubase + PCU_DM_RSTEN);
> + udelay(5);
> +
> + loop = 1000;
> + do {
> + val = readl_relaxed(pcubase + PCU_DM_PWREN);
> + val &= ~BIT(zpd->bit);
> + writel_relaxed(val, pcubase + PCU_DM_PWREN);
> +
> + udelay(1);
> +
> + val = readl_relaxed(pcubase + PCU_DM_ACK_SYNC) & BIT(zpd->bit);
> + } while (--loop && val);
> +
> + if (!loop) {
> + pr_err("Error: %s %s fail\n", __func__, domain->name);
> + return -EIO;
> + }
> +
> + pr_info("normal poweroff %s\n", domain->name);
> +
> + return 0;
> +}
> +
> +int
> +zx_pd_probe(struct platform_device *pdev,
> + struct generic_pm_domain **zx_pm_domains,
> + int domain_num)
> +{
> + 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 = zx_pm_domains;
> + genpd_data->num_domains = domain_num;
> +
> + 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 < domain_num; ++i)
> + pm_genpd_init(zx_pm_domains[i], NULL, false);
> +
> + of_genpd_add_provider_onecell(pdev->dev.of_node, genpd_data);
> + dev_info(&pdev->dev, "powerdomain init ok\n");
> + return 0;
> +}
> diff --git a/drivers/soc/zte/pm_domains.h b/drivers/soc/zte/pm_domains.h
> new file mode 100644
> index 0000000..613e0be
> --- /dev/null
> +++ b/drivers/soc/zte/pm_domains.h
> @@ -0,0 +1,29 @@
> +/*
> + * Copyright (c) 2015 ZTE Co., Ltd.
> + * http://www.zte.com.cn
> + *
> + * Header for ZTE's Power Domain Driver support
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + */
> +
> +#ifndef __ZTE_PM_DOMAIN_H
> +#define __ZTE_PM_DOMAIN_H
> +
> +#include <linux/platform_device.h>
> +#include <linux/pm_domain.h>
> +
> +struct zx_pm_domain {
> + struct generic_pm_domain dm;
> + unsigned int bit;
> +};
> +
> +extern int zx_normal_power_on(struct generic_pm_domain *domain);
> +extern int zx_normal_power_off(struct generic_pm_domain *domain);
> +extern int
> +zx_pd_probe(struct platform_device *pdev,
> + struct generic_pm_domain **zx_pm_domains,
> + int domain_num);
> +#endif /* __ZTE_PM_DOMAIN_H */
> --
> 2.7.4
>
2016-12-03 22:11 GMT+08:00 Baoyou Xie <[email protected]>:
> This patch introduces the power domain driver of zx296718
> which belongs to zte's 2967 family.
>
> Signed-off-by: Baoyou Xie <[email protected]>
> ---
> drivers/soc/zte/Makefile | 3 +
> drivers/soc/zte/zx296718_pm_domains.c | 162 ++++++++++++++++++++++++++++++++++
> 2 files changed, 165 insertions(+)
> create mode 100644 drivers/soc/zte/zx296718_pm_domains.c
>
> diff --git a/drivers/soc/zte/Makefile b/drivers/soc/zte/Makefile
> index 97ac8ea..a6e7bfe 100644
> --- a/drivers/soc/zte/Makefile
> +++ b/drivers/soc/zte/Makefile
> @@ -2,3 +2,6 @@
> # zx SOC drivers
> #
> obj-$(CONFIG_ZX_PM_DOMAINS) += pm_domains.o
> +ifeq ($(CONFIG_ZX_PM_DOMAINS), y)
> + obj-y += zx296718_pm_domains.o
> +endif
Follow unified style for Makefile:
obj-$(CONFIG_ZX_PM_DOMAINS) += zx296718_pm_domains.o
> diff --git a/drivers/soc/zte/zx296718_pm_domains.c b/drivers/soc/zte/zx296718_pm_domains.c
> new file mode 100644
> index 0000000..fc16dfd
> --- /dev/null
> +++ b/drivers/soc/zte/zx296718_pm_domains.c
> @@ -0,0 +1,162 @@
> +/*
> + * Copyright (C) 2015 ZTE Ltd.
> + *
> + * Author: Baoyou Xie <[email protected]>
> + * License terms: GNU General Public License (GPL) version 2
> + */
> +#include "pm_domains.h"
> +
> +enum {
> + PCU_DM_VOU = 0,
> + PCU_DM_SAPPU,
> + PCU_DM_VDE,
> + PCU_DM_VCE,
> + PCU_DM_HDE,
> + PCU_DM_VIU,
> + PCU_DM_USB20,
> + PCU_DM_USB21,
> + PCU_DM_USB30,
> + PCU_DM_HSIC,
> + PCU_DM_GMAC,
> + PCU_DM_TS,
> +};
> +
> +static struct zx_pm_domain vou_domain = {
> + .dm = {
> + .name = "vou_domain",
> + .power_off = zx_normal_power_off,
> + .power_on = zx_normal_power_on,
> + },
> + .bit = PCU_DM_VOU,
> +};
> +static struct zx_pm_domain sappu_domain = {
> + .dm = {
> + .name = "sappu_domain",
> + .power_off = zx_normal_power_off,
> + .power_on = zx_normal_power_on,
> + },
> + .bit = PCU_DM_SAPPU,
> +};
> +static struct zx_pm_domain vde_domain = {
> + .dm = {
> + .name = "vde_domain",
> + .power_off = zx_normal_power_off,
> + .power_on = zx_normal_power_on,
> + },
> + .bit = PCU_DM_VDE,
> +};
> +static struct zx_pm_domain vce_domain = {
> + .dm = {
> + .name = "vce_domain",
> + .power_off = zx_normal_power_off,
> + .power_on = zx_normal_power_on,
> + },
> + .bit = PCU_DM_VCE,
> +};
> +static struct zx_pm_domain hde_domain = {
> + .dm = {
> + .name = "hde_domain",
> + .power_off = zx_normal_power_off,
> + .power_on = zx_normal_power_on,
> + },
> + .bit = PCU_DM_HDE,
> +};
> +
> +static struct zx_pm_domain viu_domain = {
> + .dm = {
> + .name = "viu_domain",
> + .power_off = zx_normal_power_off,
> + .power_on = zx_normal_power_on,
> + },
> + .bit = PCU_DM_VIU,
> +};
> +static struct zx_pm_domain usb20_domain = {
> + .dm = {
> + .name = "usb20_domain",
> + .power_off = zx_normal_power_off,
> + .power_on = zx_normal_power_on,
> + },
> + .bit = PCU_DM_USB20,
> +};
> +static struct zx_pm_domain usb21_domain = {
> + .dm = {
> + .name = "usb21_domain",
> + .power_off = zx_normal_power_off,
> + .power_on = zx_normal_power_on,
> + },
> + .bit = PCU_DM_USB21,
> +};
> +static struct zx_pm_domain usb30_domain = {
> + .dm = {
> + .name = "usb30_domain",
> + .power_off = zx_normal_power_off,
> + .power_on = zx_normal_power_on,
> + },
> + .bit = PCU_DM_USB30,
> +};
> +static struct zx_pm_domain hsic_domain = {
> + .dm = {
> + .name = "hsic_domain",
> + .power_off = zx_normal_power_off,
> + .power_on = zx_normal_power_on,
> + },
> + .bit = PCU_DM_HSIC,
> +};
> +static struct zx_pm_domain gmac_domain = {
> + .dm = {
> + .name = "gmac_domain",
> + .power_off = zx_normal_power_off,
> + .power_on = zx_normal_power_on,
> + },
> + .bit = PCU_DM_GMAC,
> +};
> +static struct zx_pm_domain ts_domain = {
> + .dm = {
> + .name = "ts_domain",
> + .power_off = zx_normal_power_off,
> + .power_on = zx_normal_power_on,
> + },
> + .bit = PCU_DM_TS,
> +};
> +struct generic_pm_domain *zx296718_pm_domains[] = {
> + //&vou_domain.dm,
Remove this line.
> + &sappu_domain.dm,
If you can add an index and add the index definition in devicetree
header file, it will be more convenient when binding power domain to
device in DT file. such as
[ZX296718_PM_VDE] = &vde_domain.dm,
> + &vde_domain.dm,
> + &vce_domain.dm,
> + &hde_domain.dm,
> + &viu_domain.dm,
> + &usb20_domain.dm,
> + &usb21_domain.dm,
> + &usb30_domain.dm,
> + &hsic_domain.dm,
> + &gmac_domain.dm,
> + &ts_domain.dm,
> + &vou_domain.dm,
> +};
> +
> +static int zx296718_pd_probe(struct platform_device *pdev)
> +{
> + return zx_pd_probe(pdev,
> + zx296718_pm_domains,
> + ARRAY_SIZE(zx296718_pm_domains));
> +}
> +
> +static const struct of_device_id zx296718_pm_domain_matches[] = {
> + { .compatible = "zte,zx296718-pcu", },
Suggest to rename probe function and of_device_id to a generic zx
name, then add compatible data so that probe function can be shared.
Probe function can find SoC specific data via comparing compatible
string and initialize device accordingly.
> + { },
> +};
> +
> +static struct platform_driver zx296718_pd_driver = {
> + .driver = {
> + .name = "zx-powerdomain",
> + .owner = THIS_MODULE,
> + .of_match_table = zx296718_pm_domain_matches,
> + },
> + .probe = zx296718_pd_probe,
> +};
> +
> +static int __init zx296718_pd_init(void)
> +{
> + return platform_driver_register(&zx296718_pd_driver);
> +}
> +subsys_initcall(zx296718_pd_init);
> --
> 2.7.4
>