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Subject[PATCH 1/8] ARM: at91: pm: introduce at91_soc_pm structure
Date
From: Claudiu Beznea <claudiu.beznea@microchip.com>

To have per SoC PM information add a new structure which embed
a member of type struct at91_pm_data. This will allow easy addition
of new information without contaminate struct at91_pm_data that is
passed to the last phase suspend function (at91_suspend_sram_fn).

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
---
arch/arm/mach-at91/pm.c | 118 +++++++++++++++++++++++++-----------------------
1 file changed, 62 insertions(+), 56 deletions(-)

diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index 51e808adb00c..ce2ff86968f6 100644
--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -39,6 +39,17 @@ extern void at91_pinctrl_gpio_suspend(void);
extern void at91_pinctrl_gpio_resume(void);
#endif

+struct at91_soc_pm {
+ struct at91_pm_data data;
+};
+
+static struct at91_soc_pm soc_pm = {
+ .data = {
+ .standby_mode = AT91_PM_STANDBY,
+ .suspend_mode = AT91_PM_ULP0,
+ },
+};
+
static const match_table_t pm_modes __initconst = {
{ AT91_PM_STANDBY, "standby" },
{ AT91_PM_ULP0, "ulp0" },
@@ -47,16 +58,11 @@ static const match_table_t pm_modes __initconst = {
{ -1, NULL },
};

-static struct at91_pm_data pm_data = {
- .standby_mode = AT91_PM_STANDBY,
- .suspend_mode = AT91_PM_ULP0,
-};
-
#define at91_ramc_read(id, field) \
- __raw_readl(pm_data.ramc[id] + field)
+ __raw_readl(soc_pm.data.ramc[id] + field)

#define at91_ramc_write(id, field, value) \
- __raw_writel(value, pm_data.ramc[id] + field)
+ __raw_writel(value, soc_pm.data.ramc[id] + field)

static int at91_pm_valid_state(suspend_state_t state)
{
@@ -116,21 +122,21 @@ static int at91_pm_config_ws(unsigned int pm_mode, bool set)
if (pm_mode != AT91_PM_ULP1)
return 0;

- if (!pm_data.pmc || !pm_data.shdwc)
+ if (!soc_pm.data.pmc || !soc_pm.data.shdwc)
return -EPERM;

if (!set) {
- writel(mode, pm_data.pmc + AT91_PMC_FSMR);
+ writel(mode, soc_pm.data.pmc + AT91_PMC_FSMR);
return 0;
}

/* SHDWC.WUIR */
- val = readl(pm_data.shdwc + 0x0c);
+ val = readl(soc_pm.data.shdwc + 0x0c);
mode |= (val & 0x3ff);
polarity |= ((val >> 16) & 0x3ff);

/* SHDWC.MR */
- val = readl(pm_data.shdwc + 0x04);
+ val = readl(soc_pm.data.shdwc + 0x04);

/* Loop through defined wakeup sources. */
for_each_matching_node_and_match(np, sama5d2_ws_ids, &match) {
@@ -155,8 +161,8 @@ static int at91_pm_config_ws(unsigned int pm_mode, bool set)
}

if (mode) {
- writel(mode, pm_data.pmc + AT91_PMC_FSMR);
- writel(polarity, pm_data.pmc + AT91_PMC_FSPR);
+ writel(mode, soc_pm.data.pmc + AT91_PMC_FSMR);
+ writel(polarity, soc_pm.data.pmc + AT91_PMC_FSPR);
} else {
pr_err("AT91: PM: no ULP1 wakeup sources found!");
}
@@ -171,18 +177,18 @@ static int at91_pm_begin(suspend_state_t state)
{
switch (state) {
case PM_SUSPEND_MEM:
- pm_data.mode = pm_data.suspend_mode;
+ soc_pm.data.mode = soc_pm.data.suspend_mode;
break;

case PM_SUSPEND_STANDBY:
- pm_data.mode = pm_data.standby_mode;
+ soc_pm.data.mode = soc_pm.data.standby_mode;
break;

default:
- pm_data.mode = -1;
+ soc_pm.data.mode = -1;
}

- return at91_pm_config_ws(pm_data.mode, true);
+ return at91_pm_config_ws(soc_pm.data.mode, true);
}

/*
@@ -194,10 +200,10 @@ static int at91_pm_verify_clocks(void)
unsigned long scsr;
int i;

- scsr = readl(pm_data.pmc + AT91_PMC_SCSR);
+ scsr = readl(soc_pm.data.pmc + AT91_PMC_SCSR);

/* USB must not be using PLLB */
- if ((scsr & pm_data.uhp_udp_mask) != 0) {
+ if ((scsr & soc_pm.data.uhp_udp_mask) != 0) {
pr_err("AT91: PM - Suspend-to-RAM with USB still active\n");
return 0;
}
@@ -208,7 +214,7 @@ static int at91_pm_verify_clocks(void)

if ((scsr & (AT91_PMC_PCK0 << i)) == 0)
continue;
- css = readl(pm_data.pmc + AT91_PMC_PCKR(i)) & AT91_PMC_CSS;
+ css = readl(soc_pm.data.pmc + AT91_PMC_PCKR(i)) & AT91_PMC_CSS;
if (css != AT91_PMC_CSS_SLOW) {
pr_err("AT91: PM - Suspend-to-RAM with PCK%d src %d\n", i, css);
return 0;
@@ -230,7 +236,7 @@ static int at91_pm_verify_clocks(void)
*/
int at91_suspend_entering_slow_clock(void)
{
- return (pm_data.mode >= AT91_PM_ULP0);
+ return (soc_pm.data.mode >= AT91_PM_ULP0);
}
EXPORT_SYMBOL(at91_suspend_entering_slow_clock);

@@ -243,14 +249,14 @@ static int at91_suspend_finish(unsigned long val)
flush_cache_all();
outer_disable();

- at91_suspend_sram_fn(&pm_data);
+ at91_suspend_sram_fn(&soc_pm.data);

return 0;
}

static void at91_pm_suspend(suspend_state_t state)
{
- if (pm_data.mode == AT91_PM_BACKUP) {
+ if (soc_pm.data.mode == AT91_PM_BACKUP) {
pm_bu->suspended = 1;

cpu_suspend(0, at91_suspend_finish);
@@ -289,7 +295,7 @@ static int at91_pm_enter(suspend_state_t state)
/*
* Ensure that clocks are in a valid state.
*/
- if (pm_data.mode >= AT91_PM_ULP0 &&
+ if (soc_pm.data.mode >= AT91_PM_ULP0 &&
!at91_pm_verify_clocks())
goto error;

@@ -318,7 +324,7 @@ static int at91_pm_enter(suspend_state_t state)
*/
static void at91_pm_end(void)
{
- at91_pm_config_ws(pm_data.mode, false);
+ at91_pm_config_ws(soc_pm.data.mode, false);
}


@@ -351,7 +357,7 @@ static void at91rm9200_standby(void)
" str %2, [%1, %3]\n\t"
" mcr p15, 0, %0, c7, c0, 4\n\t"
:
- : "r" (0), "r" (pm_data.ramc[0]),
+ : "r" (0), "r" (soc_pm.data.ramc[0]),
"r" (1), "r" (AT91_MC_SDRAMC_SRR));
}

@@ -374,7 +380,7 @@ static void at91_ddr_standby(void)
at91_ramc_write(0, AT91_DDRSDRC_MDR, mdr);
}

- if (pm_data.ramc[1]) {
+ if (soc_pm.data.ramc[1]) {
saved_lpr1 = at91_ramc_read(1, AT91_DDRSDRC_LPR);
lpr1 = saved_lpr1 & ~AT91_DDRSDRC_LPCB;
lpr1 |= AT91_DDRSDRC_LPCB_SELF_REFRESH;
@@ -392,14 +398,14 @@ static void at91_ddr_standby(void)

/* self-refresh mode now */
at91_ramc_write(0, AT91_DDRSDRC_LPR, lpr0);
- if (pm_data.ramc[1])
+ if (soc_pm.data.ramc[1])
at91_ramc_write(1, AT91_DDRSDRC_LPR, lpr1);

cpu_do_idle();

at91_ramc_write(0, AT91_DDRSDRC_MDR, saved_mdr0);
at91_ramc_write(0, AT91_DDRSDRC_LPR, saved_lpr0);
- if (pm_data.ramc[1]) {
+ if (soc_pm.data.ramc[1]) {
at91_ramc_write(0, AT91_DDRSDRC_MDR, saved_mdr1);
at91_ramc_write(1, AT91_DDRSDRC_LPR, saved_lpr1);
}
@@ -429,7 +435,7 @@ static void at91sam9_sdram_standby(void)
u32 lpr0, lpr1 = 0;
u32 saved_lpr0, saved_lpr1 = 0;

- if (pm_data.ramc[1]) {
+ if (soc_pm.data.ramc[1]) {
saved_lpr1 = at91_ramc_read(1, AT91_SDRAMC_LPR);
lpr1 = saved_lpr1 & ~AT91_SDRAMC_LPCB;
lpr1 |= AT91_SDRAMC_LPCB_SELF_REFRESH;
@@ -441,13 +447,13 @@ static void at91sam9_sdram_standby(void)

/* self-refresh mode now */
at91_ramc_write(0, AT91_SDRAMC_LPR, lpr0);
- if (pm_data.ramc[1])
+ if (soc_pm.data.ramc[1])
at91_ramc_write(1, AT91_SDRAMC_LPR, lpr1);

cpu_do_idle();

at91_ramc_write(0, AT91_SDRAMC_LPR, saved_lpr0);
- if (pm_data.ramc[1])
+ if (soc_pm.data.ramc[1])
at91_ramc_write(1, AT91_SDRAMC_LPR, saved_lpr1);
}

@@ -480,14 +486,14 @@ static __init void at91_dt_ramc(void)
const struct ramc_info *ramc;

for_each_matching_node_and_match(np, ramc_ids, &of_id) {
- pm_data.ramc[idx] = of_iomap(np, 0);
- if (!pm_data.ramc[idx])
+ soc_pm.data.ramc[idx] = of_iomap(np, 0);
+ if (!soc_pm.data.ramc[idx])
panic(pr_fmt("unable to map ramc[%d] cpu registers\n"), idx);

ramc = of_id->data;
if (!standby)
standby = ramc->idle;
- pm_data.memctrl = ramc->memctrl;
+ soc_pm.data.memctrl = ramc->memctrl;

idx++;
}
@@ -509,12 +515,12 @@ static void at91rm9200_idle(void)
* Disable the processor clock. The processor will be automatically
* re-enabled by an interrupt or by a reset.
*/
- writel(AT91_PMC_PCK, pm_data.pmc + AT91_PMC_SCDR);
+ writel(AT91_PMC_PCK, soc_pm.data.pmc + AT91_PMC_SCDR);
}

static void at91sam9_idle(void)
{
- writel(AT91_PMC_PCK, pm_data.pmc + AT91_PMC_SCDR);
+ writel(AT91_PMC_PCK, soc_pm.data.pmc + AT91_PMC_SCDR);
cpu_do_idle();
}

@@ -566,8 +572,8 @@ static void __init at91_pm_sram_init(void)

static bool __init at91_is_pm_mode_active(int pm_mode)
{
- return (pm_data.standby_mode == pm_mode ||
- pm_data.suspend_mode == pm_mode);
+ return (soc_pm.data.standby_mode == pm_mode ||
+ soc_pm.data.suspend_mode == pm_mode);
}

static int __init at91_pm_backup_init(void)
@@ -586,7 +592,7 @@ static int __init at91_pm_backup_init(void)
return ret;
}

- pm_data.sfrbu = of_iomap(np, 0);
+ soc_pm.data.sfrbu = of_iomap(np, 0);
of_node_put(np);

np = of_find_compatible_node(NULL, NULL, "atmel,sama5d2-securam");
@@ -620,8 +626,8 @@ static int __init at91_pm_backup_init(void)
return 0;

securam_fail:
- iounmap(pm_data.sfrbu);
- pm_data.sfrbu = NULL;
+ iounmap(soc_pm.data.sfrbu);
+ soc_pm.data.sfrbu = NULL;
return ret;
}

@@ -630,10 +636,10 @@ static void __init at91_pm_use_default_mode(int pm_mode)
if (pm_mode != AT91_PM_ULP1 && pm_mode != AT91_PM_BACKUP)
return;

- if (pm_data.standby_mode == pm_mode)
- pm_data.standby_mode = AT91_PM_ULP0;
- if (pm_data.suspend_mode == pm_mode)
- pm_data.suspend_mode = AT91_PM_ULP0;
+ if (soc_pm.data.standby_mode == pm_mode)
+ soc_pm.data.standby_mode = AT91_PM_ULP0;
+ if (soc_pm.data.suspend_mode == pm_mode)
+ soc_pm.data.suspend_mode = AT91_PM_ULP0;
}

static void __init at91_pm_modes_init(void)
@@ -651,7 +657,7 @@ static void __init at91_pm_modes_init(void)
goto ulp1_default;
}

- pm_data.shdwc = of_iomap(np, 0);
+ soc_pm.data.shdwc = of_iomap(np, 0);
of_node_put(np);

ret = at91_pm_backup_init();
@@ -665,8 +671,8 @@ static void __init at91_pm_modes_init(void)
return;

unmap:
- iounmap(pm_data.shdwc);
- pm_data.shdwc = NULL;
+ iounmap(soc_pm.data.shdwc);
+ soc_pm.data.shdwc = NULL;
ulp1_default:
at91_pm_use_default_mode(AT91_PM_ULP1);
backup_default:
@@ -709,14 +715,14 @@ static void __init at91_pm_init(void (*pm_idle)(void))
platform_device_register(&at91_cpuidle_device);

pmc_np = of_find_matching_node_and_match(NULL, atmel_pmc_ids, &of_id);
- pm_data.pmc = of_iomap(pmc_np, 0);
- if (!pm_data.pmc) {
+ soc_pm.data.pmc = of_iomap(pmc_np, 0);
+ if (!soc_pm.data.pmc) {
pr_err("AT91: PM not supported, PMC not found\n");
return;
}

pmc = of_id->data;
- pm_data.uhp_udp_mask = pmc->uhp_udp_mask;
+ soc_pm.data.uhp_udp_mask = pmc->uhp_udp_mask;

if (pm_idle)
arm_pm_idle = pm_idle;
@@ -726,8 +732,8 @@ static void __init at91_pm_init(void (*pm_idle)(void))
if (at91_suspend_sram_fn) {
suspend_set_ops(&at91_pm_ops);
pr_info("AT91: PM: standby: %s, suspend: %s\n",
- pm_modes[pm_data.standby_mode].pattern,
- pm_modes[pm_data.suspend_mode].pattern);
+ pm_modes[soc_pm.data.standby_mode].pattern,
+ pm_modes[soc_pm.data.suspend_mode].pattern);
} else {
pr_info("AT91: PM not supported, due to no SRAM allocated\n");
}
@@ -793,8 +799,8 @@ static int __init at91_pm_modes_select(char *str)
if (suspend < 0)
return 0;

- pm_data.standby_mode = standby;
- pm_data.suspend_mode = suspend;
+ soc_pm.data.standby_mode = standby;
+ soc_pm.data.suspend_mode = suspend;

return 0;
}
--
2.7.4
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