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First fixes batch for AT91 on 4.0:
- PM slowclock fixes for DDR and timeouts - fix some DT entries - little defconfig updates - the removal of a harmful watchdog option + its detailed documentation -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQEcBAABAgAGBQJU9uKaAAoJEAf03oE53VmQrT4IAID5RZZLycH65MfI2SWs5jHJ riXpp2ByX2YMZhBV7Y+jSJcdty0zdZFXAm3cME8YtHSHFNW87y3U90BhL1JTwFh8 Rlk45xxauRmiH5R+0haBIavt+ZFHB8QOgmAE+xa4Vc/qBiry6HSgWVldk3yiai5j Mnq/+UpeL7mSlcn9kFkbVVOkDiP2tRoITU0z780tBgywbUQEluNZan4MfjSaknzP GEwmN74Z6QPUxhqc1Z1ACU84ozYcLYaiMksNXrTch0+dLz91MIRl6Eqb53XhJEK3 P8ysCj16UBgX2JuuYWBGkxrZ1Brl0Lj5075JrM+He0T/XRsLTChb+9rQ14QrKno= =YpBm -----END PGP SIGNATURE----- Merge tag 'at91-fixes' into at91-4.1-multiplatform First fixes batch for AT91 on 4.0: - PM slowclock fixes for DDR and timeouts - fix some DT entries - little defconfig updates - the removal of a harmful watchdog option + its detailed documentation
This commit is contained in:
commit
59f5f7d054
@ -26,6 +26,11 @@ Optional properties:
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- atmel,disable : Should be present if you want to disable the watchdog.
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- atmel,idle-halt : Should be present if you want to stop the watchdog when
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entering idle state.
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CAUTION: This property should be used with care, it actually makes the
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watchdog not counting when the CPU is in idle state, therefore the
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watchdog reset time depends on mean CPU usage and will not reset at all
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if the CPU stop working while it is in idle state, which is probably
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not what you want.
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- atmel,dbg-halt : Should be present if you want to stop the watchdog when
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entering debug state.
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@ -494,12 +494,12 @@
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pinctrl_usart3_rts: usart3_rts-0 {
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atmel,pins =
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<AT91_PIOB 8 AT91_PERIPH_B AT91_PINCTRL_NONE>; /* PC8 periph B */
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<AT91_PIOC 8 AT91_PERIPH_B AT91_PINCTRL_NONE>;
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};
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pinctrl_usart3_cts: usart3_cts-0 {
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atmel,pins =
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<AT91_PIOB 10 AT91_PERIPH_B AT91_PINCTRL_NONE>; /* PC10 periph B */
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<AT91_PIOC 10 AT91_PERIPH_B AT91_PINCTRL_NONE>;
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};
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};
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@ -976,7 +976,6 @@
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atmel,watchdog-type = "hardware";
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atmel,reset-type = "all";
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atmel,dbg-halt;
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atmel,idle-halt;
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status = "disabled";
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};
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@ -69,7 +69,7 @@
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sram1: sram@00500000 {
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compatible = "mmio-sram";
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reg = <0x00300000 0x4000>;
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reg = <0x00500000 0x4000>;
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};
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ahb {
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@ -905,7 +905,6 @@
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atmel,watchdog-type = "hardware";
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atmel,reset-type = "all";
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atmel,dbg-halt;
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atmel,idle-halt;
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status = "disabled";
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};
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@ -1116,7 +1116,6 @@
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atmel,watchdog-type = "hardware";
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atmel,reset-type = "all";
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atmel,dbg-halt;
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atmel,idle-halt;
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status = "disabled";
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};
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@ -894,7 +894,6 @@
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atmel,watchdog-type = "hardware";
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atmel,reset-type = "all";
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atmel,dbg-halt;
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atmel,idle-halt;
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status = "disabled";
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};
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@ -1130,7 +1130,6 @@
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atmel,watchdog-type = "hardware";
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atmel,reset-type = "all";
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atmel,dbg-halt;
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atmel,idle-halt;
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status = "disabled";
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};
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@ -1248,7 +1248,6 @@
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atmel,watchdog-type = "hardware";
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atmel,reset-type = "all";
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atmel,dbg-halt;
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atmel,idle-halt;
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status = "disabled";
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};
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@ -66,6 +66,7 @@
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gpio4 = &pioE;
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tcb0 = &tcb0;
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tcb1 = &tcb1;
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i2c0 = &i2c0;
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i2c2 = &i2c2;
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};
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cpus {
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@ -70,6 +70,7 @@ CONFIG_SCSI=y
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CONFIG_BLK_DEV_SD=y
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# CONFIG_SCSI_LOWLEVEL is not set
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CONFIG_NETDEVICES=y
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CONFIG_ARM_AT91_ETHER=y
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CONFIG_MACB=y
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# CONFIG_NET_VENDOR_BROADCOM is not set
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CONFIG_DM9000=y
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@ -3,8 +3,6 @@
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CONFIG_SYSVIPC=y
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CONFIG_IRQ_DOMAIN_DEBUG=y
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CONFIG_LOG_BUF_SHIFT=14
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CONFIG_SYSFS_DEPRECATED=y
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CONFIG_SYSFS_DEPRECATED_V2=y
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CONFIG_BLK_DEV_INITRD=y
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CONFIG_EMBEDDED=y
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CONFIG_SLAB=y
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@ -270,37 +270,35 @@ static void __init at91_pm_sram_init(void)
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phys_addr_t sram_pbase;
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unsigned long sram_base;
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struct device_node *node;
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struct platform_device *pdev;
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struct platform_device *pdev = NULL;
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node = of_find_compatible_node(NULL, NULL, "mmio-sram");
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if (!node) {
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pr_warn("%s: failed to find sram node!\n", __func__);
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return;
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for_each_compatible_node(node, NULL, "mmio-sram") {
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pdev = of_find_device_by_node(node);
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if (pdev) {
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of_node_put(node);
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break;
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}
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}
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pdev = of_find_device_by_node(node);
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if (!pdev) {
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pr_warn("%s: failed to find sram device!\n", __func__);
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goto put_node;
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return;
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}
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sram_pool = dev_get_gen_pool(&pdev->dev);
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if (!sram_pool) {
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pr_warn("%s: sram pool unavailable!\n", __func__);
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goto put_node;
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return;
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}
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sram_base = gen_pool_alloc(sram_pool, at91_slow_clock_sz);
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if (!sram_base) {
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pr_warn("%s: unable to alloc ocram!\n", __func__);
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goto put_node;
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return;
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}
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sram_pbase = gen_pool_virt_to_phys(sram_pool, sram_base);
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slow_clock = __arm_ioremap_exec(sram_pbase, at91_slow_clock_sz, false);
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put_node:
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of_node_put(node);
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}
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#endif
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@ -44,7 +44,7 @@ static inline void at91rm9200_standby(void)
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" mcr p15, 0, %0, c7, c0, 4\n\t"
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" str %5, [%1, %2]"
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:
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: "r" (0), "r" (AT91_BASE_SYS), "r" (AT91RM9200_SDRAMC_LPR),
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: "r" (0), "r" (at91_ramc_base[0]), "r" (AT91RM9200_SDRAMC_LPR),
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"r" (1), "r" (AT91RM9200_SDRAMC_SRR),
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"r" (lpr));
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}
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@ -25,11 +25,6 @@
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*/
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#undef SLOWDOWN_MASTER_CLOCK
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#define MCKRDY_TIMEOUT 1000
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#define MOSCRDY_TIMEOUT 1000
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#define PLLALOCK_TIMEOUT 1000
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#define PLLBLOCK_TIMEOUT 1000
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pmc .req r0
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sdramc .req r1
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ramc1 .req r2
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@ -41,56 +36,36 @@ tmp2 .req r5
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* Wait until master clock is ready (after switching master clock source)
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*/
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.macro wait_mckrdy
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mov tmp2, #MCKRDY_TIMEOUT
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1: sub tmp2, tmp2, #1
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cmp tmp2, #0
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beq 2f
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ldr tmp1, [pmc, #AT91_PMC_SR]
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1: ldr tmp1, [pmc, #AT91_PMC_SR]
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tst tmp1, #AT91_PMC_MCKRDY
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beq 1b
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2:
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.endm
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/*
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* Wait until master oscillator has stabilized.
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*/
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.macro wait_moscrdy
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mov tmp2, #MOSCRDY_TIMEOUT
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1: sub tmp2, tmp2, #1
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cmp tmp2, #0
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beq 2f
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ldr tmp1, [pmc, #AT91_PMC_SR]
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1: ldr tmp1, [pmc, #AT91_PMC_SR]
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tst tmp1, #AT91_PMC_MOSCS
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beq 1b
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2:
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.endm
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/*
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* Wait until PLLA has locked.
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*/
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.macro wait_pllalock
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mov tmp2, #PLLALOCK_TIMEOUT
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1: sub tmp2, tmp2, #1
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cmp tmp2, #0
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beq 2f
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ldr tmp1, [pmc, #AT91_PMC_SR]
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1: ldr tmp1, [pmc, #AT91_PMC_SR]
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tst tmp1, #AT91_PMC_LOCKA
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beq 1b
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2:
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.endm
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/*
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* Wait until PLLB has locked.
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*/
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.macro wait_pllblock
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mov tmp2, #PLLBLOCK_TIMEOUT
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1: sub tmp2, tmp2, #1
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cmp tmp2, #0
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beq 2f
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ldr tmp1, [pmc, #AT91_PMC_SR]
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1: ldr tmp1, [pmc, #AT91_PMC_SR]
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tst tmp1, #AT91_PMC_LOCKB
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beq 1b
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2:
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.endm
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.text
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@ -134,6 +109,16 @@ ddr_sr_enable:
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cmp memctrl, #AT91_MEMCTRL_DDRSDR
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bne sdr_sr_enable
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/* LPDDR1 --> force DDR2 mode during self-refresh */
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ldr tmp1, [sdramc, #AT91_DDRSDRC_MDR]
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str tmp1, .saved_sam9_mdr
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bic tmp1, tmp1, #~AT91_DDRSDRC_MD
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cmp tmp1, #AT91_DDRSDRC_MD_LOW_POWER_DDR
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ldreq tmp1, [sdramc, #AT91_DDRSDRC_MDR]
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biceq tmp1, tmp1, #AT91_DDRSDRC_MD
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orreq tmp1, tmp1, #AT91_DDRSDRC_MD_DDR2
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streq tmp1, [sdramc, #AT91_DDRSDRC_MDR]
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/* prepare for DDRAM self-refresh mode */
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ldr tmp1, [sdramc, #AT91_DDRSDRC_LPR]
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str tmp1, .saved_sam9_lpr
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@ -142,14 +127,26 @@ ddr_sr_enable:
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/* figure out if we use the second ram controller */
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cmp ramc1, #0
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ldrne tmp2, [ramc1, #AT91_DDRSDRC_LPR]
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strne tmp2, .saved_sam9_lpr1
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bicne tmp2, #AT91_DDRSDRC_LPCB
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orrne tmp2, #AT91_DDRSDRC_LPCB_SELF_REFRESH
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beq ddr_no_2nd_ctrl
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ldr tmp2, [ramc1, #AT91_DDRSDRC_MDR]
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str tmp2, .saved_sam9_mdr1
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bic tmp2, tmp2, #~AT91_DDRSDRC_MD
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cmp tmp2, #AT91_DDRSDRC_MD_LOW_POWER_DDR
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ldreq tmp2, [ramc1, #AT91_DDRSDRC_MDR]
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biceq tmp2, tmp2, #AT91_DDRSDRC_MD
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orreq tmp2, tmp2, #AT91_DDRSDRC_MD_DDR2
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streq tmp2, [ramc1, #AT91_DDRSDRC_MDR]
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ldr tmp2, [ramc1, #AT91_DDRSDRC_LPR]
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str tmp2, .saved_sam9_lpr1
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bic tmp2, #AT91_DDRSDRC_LPCB
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orr tmp2, #AT91_DDRSDRC_LPCB_SELF_REFRESH
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/* Enable DDRAM self-refresh mode */
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str tmp2, [ramc1, #AT91_DDRSDRC_LPR]
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ddr_no_2nd_ctrl:
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str tmp1, [sdramc, #AT91_DDRSDRC_LPR]
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strne tmp2, [ramc1, #AT91_DDRSDRC_LPR]
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b sdr_sr_done
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@ -280,12 +277,17 @@ sdr_sr_done:
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*/
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cmp memctrl, #AT91_MEMCTRL_DDRSDR
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bne sdr_en_restore
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/* Restore MDR in case of LPDDR1 */
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ldr tmp1, .saved_sam9_mdr
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str tmp1, [sdramc, #AT91_DDRSDRC_MDR]
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/* Restore LPR on AT91 with DDRAM */
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ldr tmp1, .saved_sam9_lpr
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str tmp1, [sdramc, #AT91_DDRSDRC_LPR]
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/* if we use the second ram controller */
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cmp ramc1, #0
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ldrne tmp2, .saved_sam9_mdr1
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strne tmp2, [ramc1, #AT91_DDRSDRC_MDR]
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ldrne tmp2, .saved_sam9_lpr1
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strne tmp2, [ramc1, #AT91_DDRSDRC_LPR]
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@ -319,5 +321,11 @@ ram_restored:
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.saved_sam9_lpr1:
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.word 0
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.saved_sam9_mdr:
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.word 0
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.saved_sam9_mdr1:
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.word 0
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ENTRY(at91_slow_clock_sz)
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.word .-at91_slow_clock
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@ -92,7 +92,7 @@
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#define AT91_DDRSDRC_UPD_MR (3 << 20) /* Update load mode register and extended mode register */
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#define AT91_DDRSDRC_MDR 0x20 /* Memory Device Register */
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#define AT91_DDRSDRC_MD (3 << 0) /* Memory Device Type */
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#define AT91_DDRSDRC_MD (7 << 0) /* Memory Device Type */
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#define AT91_DDRSDRC_MD_SDR 0
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#define AT91_DDRSDRC_MD_LOW_POWER_SDR 1
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#define AT91_DDRSDRC_MD_LOW_POWER_DDR 3
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