ARM: at91: pm: Tie the memory controller type to the ramc id

Instead of relying on the SoC type to select the memory controller type,
use the device tree ids as they are parsed anyway.
Acked-by: Wenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>

arch/arm/mach-at91/pm.c

@@ -329,11 +329,23 @@ static void at91sam9_sdram_standby(void)
 		at91_ramc_write(1, AT91_SDRAMC_LPR, saved_lpr1);
 }
 
+struct ramc_info {
+	void (*idle)(void);
+	unsigned int memctrl;
+};
+
+static const struct ramc_info ramc_infos[] __initconst = {
+	{ .idle = at91rm9200_standby, .memctrl = AT91_MEMCTRL_MC},
+	{ .idle = at91sam9_sdram_standby, .memctrl = AT91_MEMCTRL_SDRAMC},
+	{ .idle = at91_ddr_standby, .memctrl = AT91_MEMCTRL_DDRSDR},
+	{ .idle = sama5d3_ddr_standby, .memctrl = AT91_MEMCTRL_DDRSDR},
+};
+
 static const struct of_device_id const ramc_ids[] __initconst = {
-	{ .compatible = "atmel,at91rm9200-sdramc", .data = at91rm9200_standby },
-	{ .compatible = "atmel,at91sam9260-sdramc", .data = at91sam9_sdram_standby },
-	{ .compatible = "atmel,at91sam9g45-ddramc", .data = at91_ddr_standby },
-	{ .compatible = "atmel,sama5d3-ddramc", .data = sama5d3_ddr_standby },
+	{ .compatible = "atmel,at91rm9200-sdramc", .data = &ramc_infos[0] },
+	{ .compatible = "atmel,at91sam9260-sdramc", .data = &ramc_infos[1] },
+	{ .compatible = "atmel,at91sam9g45-ddramc", .data = &ramc_infos[2] },
+	{ .compatible = "atmel,sama5d3-ddramc", .data = &ramc_infos[3] },
 	{ /*sentinel*/ }
 };
 
@@ -343,14 +355,17 @@ static __init void at91_dt_ramc(void)
 	const struct of_device_id *of_id;
 	int idx = 0;
 	const void *standby = NULL;
+	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])
 			panic(pr_fmt("unable to map ramc[%d] cpu registers\n"), idx);
 
+		ramc = of_id->data;
 		if (!standby)
-			standby = of_id->data;
+			standby = ramc->idle;
+		pm_data.memctrl = ramc->memctrl;
 
 		idx++;
 	}
@@ -473,7 +488,6 @@ void __init at91rm9200_pm_init(void)
 	at91_ramc_write(0, AT91_MC_SDRAMC_LPR, 0);
 
 	pm_data.uhp_udp_mask = AT91RM9200_PMC_UHP | AT91RM9200_PMC_UDP;
-	pm_data.memctrl = AT91_MEMCTRL_MC;
 
 	at91_pm_init(at91rm9200_idle);
 }
@@ -481,7 +495,6 @@ void __init at91rm9200_pm_init(void)
 void __init at91sam9260_pm_init(void)
 {
 	at91_dt_ramc();
-	pm_data.memctrl = AT91_MEMCTRL_SDRAMC;
 	pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP | AT91SAM926x_PMC_UDP;
 	at91_pm_init(at91sam9_idle);
 }
@@ -490,7 +503,6 @@ void __init at91sam9g45_pm_init(void)
 {
 	at91_dt_ramc();
 	pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP;
-	pm_data.memctrl = AT91_MEMCTRL_DDRSDR;
 	at91_pm_init(at91sam9_idle);
 }
 
@@ -498,7 +510,6 @@ void __init at91sam9x5_pm_init(void)
 {
 	at91_dt_ramc();
 	pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP | AT91SAM926x_PMC_UDP;
-	pm_data.memctrl = AT91_MEMCTRL_DDRSDR;
 	at91_pm_init(at91sam9_idle);
 }
 
@@ -506,6 +517,5 @@ void __init sama5_pm_init(void)
 {
 	at91_dt_ramc();
 	pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP | AT91SAM926x_PMC_UDP;
-	pm_data.memctrl = AT91_MEMCTRL_DDRSDR;
 	at91_pm_init(NULL);
 }