RE: [PATCH v2 03/11] ARM: at91: pm: Move global variables into at91_pm_data

From: Wenyou.Yang
Date: Wed Mar 29 2017 - 00:51:26 EST



> -----Original Message-----
> From: Alexandre Belloni [mailto:alexandre.belloni@xxxxxxxxxxxxxxxxxx]
> Sent: 2017年3月28日 19:20
> To: Nicolas Ferre - M43238 <Nicolas.Ferre@xxxxxxxxxxxxx>
> Cc: linux-kernel@xxxxxxxxxxxxxxx; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx; Boris
> Brezillon <boris.brezillon@xxxxxxxxxxxxxxxxxx>; Wenyou Yang - A41535
> <Wenyou.Yang@xxxxxxxxxxxxx>; Alexandre Belloni <alexandre.belloni@free-
> electrons.com>
> Subject: [PATCH v2 03/11] ARM: at91: pm: Move global variables into
> at91_pm_data
>
> Instead of having separate global variables to hold IP addresses, move them to
> struct at91_pm_data.
>
> Signed-off-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxxxxxxxxx>

Acked-by: Wenyou Yang <wenyou.yang@xxxxxxxxx>

> ---
> arch/arm/mach-at91/pm.c | 44 +++++++++++++++++++++-----------------------
> 1 file changed, 21 insertions(+), 23 deletions(-)
>
> diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c index
> 41789aa4df86..c780dda3b604 100644
> --- a/arch/arm/mach-at91/pm.c
> +++ b/arch/arm/mach-at91/pm.c
> @@ -26,8 +26,6 @@
> #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 @@ -40,17
> +38,17 @@ extern void at91_pinctrl_gpio_resume(void); #endif
>
> static struct {
> + void __iomem *pmc;
> + void __iomem *ramc[2];
> unsigned long uhp_udp_mask;
> int memctrl;
> } at91_pm_data;
>
> -static void __iomem *at91_ramc_base[2]; #define at91_ramc_read(id, field) \
> - __raw_readl(at91_ramc_base[id] + field)
> + __raw_readl(at91_pm_data.ramc[id] + field)
>
> #define at91_ramc_write(id, field, value) \
> - __raw_writel(value, at91_ramc_base[id] + field)
> -
> + __raw_writel(value, at91_pm_data.ramc[id] + field)
>
> static int at91_pm_valid_state(suspend_state_t state) { @@ -86,7 +84,7 @@
> static int at91_pm_verify_clocks(void)
> unsigned long scsr;
> int i;
>
> - scsr = readl(pmc + AT91_PMC_SCSR);
> + scsr = readl(at91_pm_data.pmc + AT91_PMC_SCSR);
>
> /* USB must not be using PLLB */
> if ((scsr & at91_pm_data.uhp_udp_mask) != 0) { @@ -100,7 +98,7 @@
> static int at91_pm_verify_clocks(void)
>
> if ((scsr & (AT91_PMC_PCK0 << i)) == 0)
> continue;
> - css = readl(pmc + AT91_PMC_PCKR(i)) & AT91_PMC_CSS;
> + css = readl(at91_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;
> @@ -143,8 +141,8 @@ static void at91_pm_suspend(suspend_state_t state)
> flush_cache_all();
> outer_disable();
>
> - at91_suspend_sram_fn(pmc, at91_ramc_base[0],
> - at91_ramc_base[1], pm_data);
> + at91_suspend_sram_fn(at91_pm_data.pmc, at91_pm_data.ramc[0],
> + at91_pm_data.ramc[1], pm_data);
>
> outer_resume();
> }
> @@ -247,7 +245,7 @@ static void at91rm9200_standby(void)
> " mcr p15, 0, %0, c7, c0, 4\n\t"
> " str %5, [%1, %2]"
> :
> - : "r" (0), "r" (at91_ramc_base[0]), "r" (AT91_MC_SDRAMC_LPR),
> + : "r" (0), "r" (at91_pm_data.ramc[0]), "r"
> (AT91_MC_SDRAMC_LPR),
> "r" (1), "r" (AT91_MC_SDRAMC_SRR),
> "r" (lpr));
> }
> @@ -262,7 +260,7 @@ static void at91_ddr_standby(void)
> u32 lpr0, lpr1 = 0;
> u32 saved_lpr0, saved_lpr1 = 0;
>
> - if (at91_ramc_base[1]) {
> + if (at91_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; @@ -274,13
> +272,13 @@ static void at91_ddr_standby(void)
>
> /* self-refresh mode now */
> at91_ramc_write(0, AT91_DDRSDRC_LPR, lpr0);
> - if (at91_ramc_base[1])
> + if (at91_pm_data.ramc[1])
> at91_ramc_write(1, AT91_DDRSDRC_LPR, lpr1);
>
> cpu_do_idle();
>
> at91_ramc_write(0, AT91_DDRSDRC_LPR, saved_lpr0);
> - if (at91_ramc_base[1])
> + if (at91_pm_data.ramc[1])
> at91_ramc_write(1, AT91_DDRSDRC_LPR, saved_lpr1); }
>
> @@ -308,7 +306,7 @@ static void at91sam9_sdram_standby(void)
> u32 lpr0, lpr1 = 0;
> u32 saved_lpr0, saved_lpr1 = 0;
>
> - if (at91_ramc_base[1]) {
> + if (at91_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; @@ -320,13
> +318,13 @@ static void at91sam9_sdram_standby(void)
>
> /* self-refresh mode now */
> at91_ramc_write(0, AT91_SDRAMC_LPR, lpr0);
> - if (at91_ramc_base[1])
> + if (at91_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 (at91_ramc_base[1])
> + if (at91_pm_data.ramc[1])
> at91_ramc_write(1, AT91_SDRAMC_LPR, saved_lpr1); }
>
> @@ -346,8 +344,8 @@ static __init void at91_dt_ramc(void)
> const void *standby = NULL;
>
> for_each_matching_node_and_match(np, ramc_ids, &of_id) {
> - at91_ramc_base[idx] = of_iomap(np, 0);
> - if (!at91_ramc_base[idx])
> + at91_pm_data.ramc[idx] = of_iomap(np, 0);
> + if (!at91_pm_data.ramc[idx])
> panic(pr_fmt("unable to map ramc[%d] cpu registers\n"),
> idx);
>
> if (!standby)
> @@ -373,12 +371,12 @@ 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, pmc + AT91_PMC_SCDR);
> + writel(AT91_PMC_PCK, at91_pm_data.pmc + AT91_PMC_SCDR);
> }
>
> static void at91sam9_idle(void)
> {
> - writel(AT91_PMC_PCK, pmc + AT91_PMC_SCDR);
> + writel(AT91_PMC_PCK, at91_pm_data.pmc + AT91_PMC_SCDR);
> cpu_do_idle();
> }
>
> @@ -447,8 +445,8 @@ static void __init at91_pm_init(void (*pm_idle)(void))
> platform_device_register(&at91_cpuidle_device);
>
> pmc_np = of_find_matching_node(NULL, atmel_pmc_ids);
> - pmc = of_iomap(pmc_np, 0);
> - if (!pmc) {
> + at91_pm_data.pmc = of_iomap(pmc_np, 0);
> + if (!at91_pm_data.pmc) {
> pr_err("AT91: PM not supported, PMC not found\n");
> return;
> }
> --
> 2.11.0