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| author | Alexandre Belloni <alexandre.belloni@free-electrons.com> | 2015-09-30 01:31:34 +0200 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@free-electrons.com> | 2016-02-17 17:53:01 +0100 |
| commit | 5737b73e193ba9d09286b621eecd9db3f3c6abd2 (patch) | |
| tree | d8b39d7ec9a23e434d5efc7a148ccfecd7177ac6 /arch/arm/mach-at91 | |
| parent | 997ff83b55c3f50cd5179b9d02d37429064b35eb (diff) | |
| download | linux-5737b73e193ba9d09286b621eecd9db3f3c6abd2.tar.bz2 | |
ARM: at91: pm: find and remap the pmc
To avoid relying on at91_pmc_read(), find the pmc node and remap it
locally.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Diffstat (limited to 'arch/arm/mach-at91')
| -rw-r--r-- | arch/arm/mach-at91/pm.c | 33 |
1 files changed, 27 insertions, 6 deletions
diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c index db32bf846cef..8923efbfa7fa 100644 --- a/arch/arm/mach-at91/pm.c +++ b/arch/arm/mach-at91/pm.c @@ -35,6 +35,8 @@ #include "generic.h" #include "pm.h" +static void __iomem *pmc; + /* * FIXME: this is needed to communicate between the pinctrl driver and * the PM implementation in the machine. Possibly part of the PM @@ -87,7 +89,7 @@ static int at91_pm_verify_clocks(void) unsigned long scsr; int i; - scsr = at91_pmc_read(AT91_PMC_SCSR); + scsr = readl(pmc + AT91_PMC_SCSR); /* USB must not be using PLLB */ if ((scsr & at91_pm_data.uhp_udp_mask) != 0) { @@ -101,8 +103,7 @@ static int at91_pm_verify_clocks(void) if ((scsr & (AT91_PMC_PCK0 << i)) == 0) continue; - - css = at91_pmc_read(AT91_PMC_PCKR(i)) & AT91_PMC_CSS; + css = readl(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; @@ -145,8 +146,8 @@ static void at91_pm_suspend(suspend_state_t state) flush_cache_all(); outer_disable(); - at91_suspend_sram_fn(at91_pmc_base, at91_ramc_base[0], - at91_ramc_base[1], pm_data); + at91_suspend_sram_fn(pmc, at91_ramc_base[0], + at91_ramc_base[1], pm_data); outer_resume(); } @@ -399,13 +400,33 @@ static void __init at91_pm_sram_init(void) &at91_pm_suspend_in_sram, at91_pm_suspend_in_sram_sz); } +static const struct of_device_id atmel_pmc_ids[] __initconst = { + { .compatible = "atmel,at91rm9200-pmc" }, + { .compatible = "atmel,at91sam9260-pmc" }, + { .compatible = "atmel,at91sam9g45-pmc" }, + { .compatible = "atmel,at91sam9n12-pmc" }, + { .compatible = "atmel,at91sam9x5-pmc" }, + { .compatible = "atmel,sama5d3-pmc" }, + { .compatible = "atmel,sama5d2-pmc" }, + { /* sentinel */ }, +}; + static void __init at91_pm_init(void) { - at91_pm_sram_init(); + struct device_node *pmc_np; if (at91_cpuidle_device.dev.platform_data) platform_device_register(&at91_cpuidle_device); + pmc_np = of_find_matching_node(NULL, atmel_pmc_ids); + pmc = of_iomap(pmc_np, 0); + if (!pmc) { + pr_err("AT91: PM not supported, PMC not found\n"); + return; + } + + at91_pm_sram_init(); + if (at91_suspend_sram_fn) suspend_set_ops(&at91_pm_ops); else |