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authorArnd Bergmann <arnd@arndb.de>2015-04-13 19:50:21 -0400
committerArnd Bergmann <arnd@arndb.de>2015-04-13 19:50:21 -0400
commit89522f0f8bd5056dec21bb7de073cbd5886e435c (patch)
treef4755458dbff71851af23675417173a95271491f
parente8621d83c10ee95798bdb5e04f54439a7c1c9a2b (diff)
parent2e57dc087c27b8b0bd4a9e5f2c6f28f3cd0b47ff (diff)
Merge tag 'at91-cleanup4_bis' of git://git.kernel.org/pub/scm/linux/kernel/git/nferre/linux-at91 into next/multiplatform
Pull "Fourth batch of cleanup for 4.1" from Nicolas Ferre: - 1 issues revealed by the kbuild test robot fixed - move of some functions and macros into relevant files to be able to streamline the at91 specific header afterwards * tag 'at91-cleanup4_bis' of git://git.kernel.org/pub/scm/linux/kernel/git/nferre/linux-at91: ARM: at91/pm: move AT91_MEMCTRL_* to pm.h ARM: at91/pm: move the standby functions to pm.c ARM: at91: fix pm_suspend.S compilation when ARMv6 is selected
-rw-r--r--arch/arm/mach-at91/Makefile3
-rw-r--r--arch/arm/mach-at91/include/mach/at91_ramc.h4
-rw-r--r--arch/arm/mach-at91/pm.c89
-rw-r--r--arch/arm/mach-at91/pm.h96
4 files changed, 96 insertions, 96 deletions
diff --git a/arch/arm/mach-at91/Makefile b/arch/arm/mach-at91/Makefile
index 06a4cefd33a0..4fa8b4541e64 100644
--- a/arch/arm/mach-at91/Makefile
+++ b/arch/arm/mach-at91/Makefile
@@ -17,6 +17,9 @@ obj-$(CONFIG_SOC_SAMA5) += sama5.o
17obj-$(CONFIG_PM) += pm.o 17obj-$(CONFIG_PM) += pm.o
18obj-$(CONFIG_PM) += pm_suspend.o 18obj-$(CONFIG_PM) += pm_suspend.o
19 19
20ifeq ($(CONFIG_CPU_V7),y)
21AFLAGS_pm_suspend.o := -march=armv7-a
22endif
20ifeq ($(CONFIG_PM_DEBUG),y) 23ifeq ($(CONFIG_PM_DEBUG),y)
21CFLAGS_pm.o += -DDEBUG 24CFLAGS_pm.o += -DDEBUG
22endif 25endif
diff --git a/arch/arm/mach-at91/include/mach/at91_ramc.h b/arch/arm/mach-at91/include/mach/at91_ramc.h
index e4492b151fee..493bc486e858 100644
--- a/arch/arm/mach-at91/include/mach/at91_ramc.h
+++ b/arch/arm/mach-at91/include/mach/at91_ramc.h
@@ -21,10 +21,6 @@ extern void __iomem *at91_ramc_base[];
21.extern at91_ramc_base 21.extern at91_ramc_base
22#endif 22#endif
23 23
24#define AT91_MEMCTRL_MC 0
25#define AT91_MEMCTRL_SDRAMC 1
26#define AT91_MEMCTRL_DDRSDR 2
27
28#include <soc/at91/at91rm9200_sdramc.h> 24#include <soc/at91/at91rm9200_sdramc.h>
29#include <soc/at91/at91sam9_ddrsdr.h> 25#include <soc/at91/at91sam9_ddrsdr.h>
30#include <soc/at91/at91sam9_sdramc.h> 26#include <soc/at91/at91sam9_sdramc.h>
diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index f93a735ba327..5062699cbb12 100644
--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -222,6 +222,95 @@ static void at91_pm_set_standby(void (*at91_standby)(void))
222 at91_cpuidle_device.dev.platform_data = at91_standby; 222 at91_cpuidle_device.dev.platform_data = at91_standby;
223} 223}
224 224
225/*
226 * The AT91RM9200 goes into self-refresh mode with this command, and will
227 * terminate self-refresh automatically on the next SDRAM access.
228 *
229 * Self-refresh mode is exited as soon as a memory access is made, but we don't
230 * know for sure when that happens. However, we need to restore the low-power
231 * mode if it was enabled before going idle. Restoring low-power mode while
232 * still in self-refresh is "not recommended", but seems to work.
233 */
234static void at91rm9200_standby(void)
235{
236 u32 lpr = at91_ramc_read(0, AT91RM9200_SDRAMC_LPR);
237
238 asm volatile(
239 "b 1f\n\t"
240 ".align 5\n\t"
241 "1: mcr p15, 0, %0, c7, c10, 4\n\t"
242 " str %0, [%1, %2]\n\t"
243 " str %3, [%1, %4]\n\t"
244 " mcr p15, 0, %0, c7, c0, 4\n\t"
245 " str %5, [%1, %2]"
246 :
247 : "r" (0), "r" (at91_ramc_base[0]), "r" (AT91RM9200_SDRAMC_LPR),
248 "r" (1), "r" (AT91RM9200_SDRAMC_SRR),
249 "r" (lpr));
250}
251
252/* We manage both DDRAM/SDRAM controllers, we need more than one value to
253 * remember.
254 */
255static void at91_ddr_standby(void)
256{
257 /* Those two values allow us to delay self-refresh activation
258 * to the maximum. */
259 u32 lpr0, lpr1 = 0;
260 u32 saved_lpr0, saved_lpr1 = 0;
261
262 if (at91_ramc_base[1]) {
263 saved_lpr1 = at91_ramc_read(1, AT91_DDRSDRC_LPR);
264 lpr1 = saved_lpr1 & ~AT91_DDRSDRC_LPCB;
265 lpr1 |= AT91_DDRSDRC_LPCB_SELF_REFRESH;
266 }
267
268 saved_lpr0 = at91_ramc_read(0, AT91_DDRSDRC_LPR);
269 lpr0 = saved_lpr0 & ~AT91_DDRSDRC_LPCB;
270 lpr0 |= AT91_DDRSDRC_LPCB_SELF_REFRESH;
271
272 /* self-refresh mode now */
273 at91_ramc_write(0, AT91_DDRSDRC_LPR, lpr0);
274 if (at91_ramc_base[1])
275 at91_ramc_write(1, AT91_DDRSDRC_LPR, lpr1);
276
277 cpu_do_idle();
278
279 at91_ramc_write(0, AT91_DDRSDRC_LPR, saved_lpr0);
280 if (at91_ramc_base[1])
281 at91_ramc_write(1, AT91_DDRSDRC_LPR, saved_lpr1);
282}
283
284/* We manage both DDRAM/SDRAM controllers, we need more than one value to
285 * remember.
286 */
287static void at91sam9_sdram_standby(void)
288{
289 u32 lpr0, lpr1 = 0;
290 u32 saved_lpr0, saved_lpr1 = 0;
291
292 if (at91_ramc_base[1]) {
293 saved_lpr1 = at91_ramc_read(1, AT91_SDRAMC_LPR);
294 lpr1 = saved_lpr1 & ~AT91_SDRAMC_LPCB;
295 lpr1 |= AT91_SDRAMC_LPCB_SELF_REFRESH;
296 }
297
298 saved_lpr0 = at91_ramc_read(0, AT91_SDRAMC_LPR);
299 lpr0 = saved_lpr0 & ~AT91_SDRAMC_LPCB;
300 lpr0 |= AT91_SDRAMC_LPCB_SELF_REFRESH;
301
302 /* self-refresh mode now */
303 at91_ramc_write(0, AT91_SDRAMC_LPR, lpr0);
304 if (at91_ramc_base[1])
305 at91_ramc_write(1, AT91_SDRAMC_LPR, lpr1);
306
307 cpu_do_idle();
308
309 at91_ramc_write(0, AT91_SDRAMC_LPR, saved_lpr0);
310 if (at91_ramc_base[1])
311 at91_ramc_write(1, AT91_SDRAMC_LPR, saved_lpr1);
312}
313
225static const struct of_device_id ramc_ids[] __initconst = { 314static const struct of_device_id ramc_ids[] __initconst = {
226 { .compatible = "atmel,at91rm9200-sdramc", .data = at91rm9200_standby }, 315 { .compatible = "atmel,at91rm9200-sdramc", .data = at91rm9200_standby },
227 { .compatible = "atmel,at91sam9260-sdramc", .data = at91sam9_sdram_standby }, 316 { .compatible = "atmel,at91sam9260-sdramc", .data = at91sam9_sdram_standby },
diff --git a/arch/arm/mach-at91/pm.h b/arch/arm/mach-at91/pm.h
index dcacfa1ad3fa..ecd875a91d52 100644
--- a/arch/arm/mach-at91/pm.h
+++ b/arch/arm/mach-at91/pm.h
@@ -15,6 +15,10 @@
15 15
16#include <mach/at91_ramc.h> 16#include <mach/at91_ramc.h>
17 17
18#define AT91_MEMCTRL_MC 0
19#define AT91_MEMCTRL_SDRAMC 1
20#define AT91_MEMCTRL_DDRSDR 2
21
18#define AT91_PM_MEMTYPE_MASK 0x0f 22#define AT91_PM_MEMTYPE_MASK 0x0f
19 23
20#define AT91_PM_MODE_OFFSET 4 24#define AT91_PM_MODE_OFFSET 4
@@ -23,96 +27,4 @@
23 27
24#define AT91_PM_SLOW_CLOCK 0x01 28#define AT91_PM_SLOW_CLOCK 0x01
25 29
26/*
27 * The AT91RM9200 goes into self-refresh mode with this command, and will
28 * terminate self-refresh automatically on the next SDRAM access.
29 *
30 * Self-refresh mode is exited as soon as a memory access is made, but we don't
31 * know for sure when that happens. However, we need to restore the low-power
32 * mode if it was enabled before going idle. Restoring low-power mode while
33 * still in self-refresh is "not recommended", but seems to work.
34 */
35
36#ifndef __ASSEMBLY__
37static inline void at91rm9200_standby(void)
38{
39 u32 lpr = at91_ramc_read(0, AT91RM9200_SDRAMC_LPR);
40
41 asm volatile(
42 "b 1f\n\t"
43 ".align 5\n\t"
44 "1: mcr p15, 0, %0, c7, c10, 4\n\t"
45 " str %0, [%1, %2]\n\t"
46 " str %3, [%1, %4]\n\t"
47 " mcr p15, 0, %0, c7, c0, 4\n\t"
48 " str %5, [%1, %2]"
49 :
50 : "r" (0), "r" (at91_ramc_base[0]), "r" (AT91RM9200_SDRAMC_LPR),
51 "r" (1), "r" (AT91RM9200_SDRAMC_SRR),
52 "r" (lpr));
53}
54
55/* We manage both DDRAM/SDRAM controllers, we need more than one value to
56 * remember.
57 */
58static inline void at91_ddr_standby(void)
59{
60 /* Those two values allow us to delay self-refresh activation
61 * to the maximum. */
62 u32 lpr0, lpr1 = 0;
63 u32 saved_lpr0, saved_lpr1 = 0;
64
65 if (at91_ramc_base[1]) {
66 saved_lpr1 = at91_ramc_read(1, AT91_DDRSDRC_LPR);
67 lpr1 = saved_lpr1 & ~AT91_DDRSDRC_LPCB;
68 lpr1 |= AT91_DDRSDRC_LPCB_SELF_REFRESH;
69 }
70
71 saved_lpr0 = at91_ramc_read(0, AT91_DDRSDRC_LPR);
72 lpr0 = saved_lpr0 & ~AT91_DDRSDRC_LPCB;
73 lpr0 |= AT91_DDRSDRC_LPCB_SELF_REFRESH;
74
75 /* self-refresh mode now */
76 at91_ramc_write(0, AT91_DDRSDRC_LPR, lpr0);
77 if (at91_ramc_base[1])
78 at91_ramc_write(1, AT91_DDRSDRC_LPR, lpr1);
79
80 cpu_do_idle();
81
82 at91_ramc_write(0, AT91_DDRSDRC_LPR, saved_lpr0);
83 if (at91_ramc_base[1])
84 at91_ramc_write(1, AT91_DDRSDRC_LPR, saved_lpr1);
85}
86
87/* We manage both DDRAM/SDRAM controllers, we need more than one value to
88 * remember.
89 */
90static inline void at91sam9_sdram_standby(void)
91{
92 u32 lpr0, lpr1 = 0;
93 u32 saved_lpr0, saved_lpr1 = 0;
94
95 if (at91_ramc_base[1]) {
96 saved_lpr1 = at91_ramc_read(1, AT91_SDRAMC_LPR);
97 lpr1 = saved_lpr1 & ~AT91_SDRAMC_LPCB;
98 lpr1 |= AT91_SDRAMC_LPCB_SELF_REFRESH;
99 }
100
101 saved_lpr0 = at91_ramc_read(0, AT91_SDRAMC_LPR);
102 lpr0 = saved_lpr0 & ~AT91_SDRAMC_LPCB;
103 lpr0 |= AT91_SDRAMC_LPCB_SELF_REFRESH;
104
105 /* self-refresh mode now */
106 at91_ramc_write(0, AT91_SDRAMC_LPR, lpr0);
107 if (at91_ramc_base[1])
108 at91_ramc_write(1, AT91_SDRAMC_LPR, lpr1);
109
110 cpu_do_idle();
111
112 at91_ramc_write(0, AT91_SDRAMC_LPR, saved_lpr0);
113 if (at91_ramc_base[1])
114 at91_ramc_write(1, AT91_SDRAMC_LPR, saved_lpr1);
115}
116
117#endif
118#endif 30#endif