Commit ee4df236 authored by Lubomir Rintel's avatar Lubomir Rintel Committed by Stephen Boyd

clk: mmp2: Add support for power islands

Apart from the clocks and resets, the PMU hardware also controls power
to peripherals that are on separate power islands. On MMP2, that's the
GC860 GPU and the SSPA audio interface, while on MMP3 also the camera
interface is on a separate island, along with the pair of GC2000 and GC300
GPUs and the SSPA.
Signed-off-by: default avatarLubomir Rintel <lkundrak@v3.sk>
Link: https://lkml.kernel.org/r/20200519224151.2074597-12-lkundrak@v3.skSigned-off-by: default avatarStephen Boyd <sboyd@kernel.org>
parent 17d43046
...@@ -125,6 +125,8 @@ config MACH_MMP2_DT ...@@ -125,6 +125,8 @@ config MACH_MMP2_DT
select PINCTRL_SINGLE select PINCTRL_SINGLE
select ARCH_HAS_RESET_CONTROLLER select ARCH_HAS_RESET_CONTROLLER
select CPU_PJ4 select CPU_PJ4
select PM_GENERIC_DOMAINS if PM
select PM_GENERIC_DOMAINS_OF if PM && OF
help help
Include support for Marvell MMP2 based platforms using Include support for Marvell MMP2 based platforms using
the device tree. the device tree.
......
...@@ -8,7 +8,7 @@ obj-y += clk-apbc.o clk-apmu.o clk-frac.o clk-mix.o clk-gate.o clk.o ...@@ -8,7 +8,7 @@ obj-y += clk-apbc.o clk-apmu.o clk-frac.o clk-mix.o clk-gate.o clk.o
obj-$(CONFIG_RESET_CONTROLLER) += reset.o obj-$(CONFIG_RESET_CONTROLLER) += reset.o
obj-$(CONFIG_MACH_MMP_DT) += clk-of-pxa168.o clk-of-pxa910.o obj-$(CONFIG_MACH_MMP_DT) += clk-of-pxa168.o clk-of-pxa910.o
obj-$(CONFIG_COMMON_CLK_MMP2) += clk-of-mmp2.o clk-pll.o obj-$(CONFIG_COMMON_CLK_MMP2) += clk-of-mmp2.o clk-pll.o pwr-island.o
obj-$(CONFIG_CPU_PXA168) += clk-pxa168.o obj-$(CONFIG_CPU_PXA168) += clk-pxa168.o
obj-$(CONFIG_CPU_PXA910) += clk-pxa910.o obj-$(CONFIG_CPU_PXA910) += clk-pxa910.o
......
...@@ -17,8 +17,10 @@ ...@@ -17,8 +17,10 @@
#include <linux/delay.h> #include <linux/delay.h>
#include <linux/err.h> #include <linux/err.h>
#include <linux/of_address.h> #include <linux/of_address.h>
#include <linux/clk.h>
#include <dt-bindings/clock/marvell,mmp2.h> #include <dt-bindings/clock/marvell,mmp2.h>
#include <dt-bindings/power/marvell,mmp2.h>
#include "clk.h" #include "clk.h"
#include "reset.h" #include "reset.h"
...@@ -63,6 +65,7 @@ ...@@ -63,6 +65,7 @@
#define APMU_USBHSIC1 0xfc #define APMU_USBHSIC1 0xfc
#define APMU_GPU 0xcc #define APMU_GPU 0xcc
#define APMU_AUDIO 0x10c #define APMU_AUDIO 0x10c
#define APMU_CAMERA 0x1fc
#define MPMU_FCCR 0x8 #define MPMU_FCCR 0x8
#define MPMU_POSR 0x10 #define MPMU_POSR 0x10
...@@ -86,6 +89,8 @@ enum mmp2_clk_model { ...@@ -86,6 +89,8 @@ enum mmp2_clk_model {
struct mmp2_clk_unit { struct mmp2_clk_unit {
struct mmp_clk_unit unit; struct mmp_clk_unit unit;
enum mmp2_clk_model model; enum mmp2_clk_model model;
struct genpd_onecell_data pd_data;
struct generic_pm_domain *pm_domains[MMP2_NR_POWER_DOMAINS];
void __iomem *mpmu_base; void __iomem *mpmu_base;
void __iomem *apmu_base; void __iomem *apmu_base;
void __iomem *apbc_base; void __iomem *apbc_base;
...@@ -473,6 +478,41 @@ static void mmp2_clk_reset_init(struct device_node *np, ...@@ -473,6 +478,41 @@ static void mmp2_clk_reset_init(struct device_node *np,
mmp_clk_reset_register(np, cells, nr_resets); mmp_clk_reset_register(np, cells, nr_resets);
} }
static void mmp2_pm_domain_init(struct device_node *np,
struct mmp2_clk_unit *pxa_unit)
{
if (pxa_unit->model == CLK_MODEL_MMP3) {
pxa_unit->pm_domains[MMP2_POWER_DOMAIN_GPU]
= mmp_pm_domain_register("gpu",
pxa_unit->apmu_base + APMU_GPU,
0x0600, 0x40003, 0x18000c, 0, &gpu_lock);
} else {
pxa_unit->pm_domains[MMP2_POWER_DOMAIN_GPU]
= mmp_pm_domain_register("gpu",
pxa_unit->apmu_base + APMU_GPU,
0x8600, 0x00003, 0x00000c,
MMP_PM_DOMAIN_NO_DISABLE, &gpu_lock);
}
pxa_unit->pd_data.num_domains++;
pxa_unit->pm_domains[MMP2_POWER_DOMAIN_AUDIO]
= mmp_pm_domain_register("audio",
pxa_unit->apmu_base + APMU_AUDIO,
0x600, 0x2, 0, 0, &audio_lock);
pxa_unit->pd_data.num_domains++;
if (pxa_unit->model == CLK_MODEL_MMP3) {
pxa_unit->pm_domains[MMP3_POWER_DOMAIN_CAMERA]
= mmp_pm_domain_register("camera",
pxa_unit->apmu_base + APMU_CAMERA,
0x600, 0, 0, 0, NULL);
pxa_unit->pd_data.num_domains++;
}
pxa_unit->pd_data.domains = pxa_unit->pm_domains;
of_genpd_add_provider_onecell(np, &pxa_unit->pd_data);
}
static void __init mmp2_clk_init(struct device_node *np) static void __init mmp2_clk_init(struct device_node *np)
{ {
struct mmp2_clk_unit *pxa_unit; struct mmp2_clk_unit *pxa_unit;
...@@ -504,6 +544,8 @@ static void __init mmp2_clk_init(struct device_node *np) ...@@ -504,6 +544,8 @@ static void __init mmp2_clk_init(struct device_node *np)
goto unmap_apmu_region; goto unmap_apmu_region;
} }
mmp2_pm_domain_init(np, pxa_unit);
mmp_clk_init(np, &pxa_unit->unit, MMP2_NR_CLKS); mmp_clk_init(np, &pxa_unit->unit, MMP2_NR_CLKS);
mmp2_main_clk_init(pxa_unit); mmp2_main_clk_init(pxa_unit);
......
...@@ -3,6 +3,7 @@ ...@@ -3,6 +3,7 @@
#define __MACH_MMP_CLK_H #define __MACH_MMP_CLK_H
#include <linux/clk-provider.h> #include <linux/clk-provider.h>
#include <linux/pm_domain.h>
#include <linux/clkdev.h> #include <linux/clkdev.h>
#define APBC_NO_BUS_CTRL BIT(0) #define APBC_NO_BUS_CTRL BIT(0)
...@@ -259,4 +260,13 @@ void mmp_clk_init(struct device_node *np, struct mmp_clk_unit *unit, ...@@ -259,4 +260,13 @@ void mmp_clk_init(struct device_node *np, struct mmp_clk_unit *unit,
int nr_clks); int nr_clks);
void mmp_clk_add(struct mmp_clk_unit *unit, unsigned int id, void mmp_clk_add(struct mmp_clk_unit *unit, unsigned int id,
struct clk *clk); struct clk *clk);
/* Power islands */
#define MMP_PM_DOMAIN_NO_DISABLE BIT(0)
struct generic_pm_domain *mmp_pm_domain_register(const char *name,
void __iomem *reg,
u32 power_on, u32 reset, u32 clock_enable,
unsigned int flags, spinlock_t *lock);
#endif #endif
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* MMP PMU power island support
*
* Copyright (C) 2020 Lubomir Rintel <lkundrak@v3.sk>
*/
#include <linux/pm_domain.h>
#include <linux/slab.h>
#include <linux/io.h>
#include "clk.h"
#define to_mmp_pm_domain(genpd) container_of(genpd, struct mmp_pm_domain, genpd)
struct mmp_pm_domain {
struct generic_pm_domain genpd;
void __iomem *reg;
spinlock_t *lock;
u32 power_on;
u32 reset;
u32 clock_enable;
unsigned int flags;
};
static int mmp_pm_domain_power_on(struct generic_pm_domain *genpd)
{
struct mmp_pm_domain *pm_domain = to_mmp_pm_domain(genpd);
unsigned long flags = 0;
u32 val;
if (pm_domain->lock)
spin_lock_irqsave(pm_domain->lock, flags);
val = readl(pm_domain->reg);
/* Turn on the power island */
val |= pm_domain->power_on;
writel(val, pm_domain->reg);
/* Disable isolation */
val |= 0x100;
writel(val, pm_domain->reg);
/* Some blocks need to be reset after a power up */
if (pm_domain->reset || pm_domain->clock_enable) {
u32 after_power_on = val;
val &= ~pm_domain->reset;
writel(val, pm_domain->reg);
val |= pm_domain->clock_enable;
writel(val, pm_domain->reg);
val |= pm_domain->reset;
writel(val, pm_domain->reg);
writel(after_power_on, pm_domain->reg);
}
if (pm_domain->lock)
spin_unlock_irqrestore(pm_domain->lock, flags);
return 0;
}
static int mmp_pm_domain_power_off(struct generic_pm_domain *genpd)
{
struct mmp_pm_domain *pm_domain = to_mmp_pm_domain(genpd);
unsigned long flags = 0;
u32 val;
if (pm_domain->flags & MMP_PM_DOMAIN_NO_DISABLE)
return 0;
if (pm_domain->lock)
spin_lock_irqsave(pm_domain->lock, flags);
/* Turn off and isolate the the power island. */
val = readl(pm_domain->reg);
val &= ~pm_domain->power_on;
val &= ~0x100;
writel(val, pm_domain->reg);
if (pm_domain->lock)
spin_unlock_irqrestore(pm_domain->lock, flags);
return 0;
}
struct generic_pm_domain *mmp_pm_domain_register(const char *name,
void __iomem *reg,
u32 power_on, u32 reset, u32 clock_enable,
unsigned int flags, spinlock_t *lock)
{
struct mmp_pm_domain *pm_domain;
pm_domain = kzalloc(sizeof(*pm_domain), GFP_KERNEL);
if (!pm_domain)
return ERR_PTR(-ENOMEM);
pm_domain->reg = reg;
pm_domain->power_on = power_on;
pm_domain->reset = reset;
pm_domain->clock_enable = clock_enable;
pm_domain->flags = flags;
pm_domain->lock = lock;
pm_genpd_init(&pm_domain->genpd, NULL, true);
pm_domain->genpd.name = name;
pm_domain->genpd.power_on = mmp_pm_domain_power_on;
pm_domain->genpd.power_off = mmp_pm_domain_power_off;
return &pm_domain->genpd;
}
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