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-rw-r--r--arch/arm/mach-at91/Kconfig41
-rw-r--r--arch/arm/mach-at91/Makefile1
-rw-r--r--arch/arm/mach-at91/generic.h2
-rw-r--r--arch/arm/mach-at91/pm.c133
-rw-r--r--arch/arm/mach-at91/pm.h1
-rw-r--r--arch/arm/mach-at91/pm_data-offsets.c2
-rw-r--r--arch/arm/mach-at91/pm_suspend.S142
-rw-r--r--arch/arm/mach-at91/sam9x7.c33
-rw-r--r--arch/arm/mach-at91/samv7.c7
9 files changed, 270 insertions, 92 deletions
diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
index 3dd9e718661b..c5ef27e3cd8f 100644
--- a/arch/arm/mach-at91/Kconfig
+++ b/arch/arm/mach-at91/Kconfig
@@ -1,4 +1,7 @@
# SPDX-License-Identifier: GPL-2.0-only
+config ARCH_MICROCHIP
+ bool
+
menuconfig ARCH_AT91
bool "AT91/Microchip SoCs"
depends on (CPU_LITTLE_ENDIAN && (ARCH_MULTI_V4T || ARCH_MULTI_V5)) || \
@@ -8,6 +11,7 @@ menuconfig ARCH_AT91
select GPIOLIB
select PINCTRL
select SOC_BUS
+ select ARCH_MICROCHIP
if ARCH_AT91
config SOC_SAMV7
@@ -58,6 +62,17 @@ config SOC_SAMA5D4
help
Select this if you are using one of Microchip's SAMA5D4 family SoC.
+config SOC_SAMA7D65
+ bool "SAMA7D65 family"
+ depends on ARCH_MULTI_V7
+ select HAVE_AT91_GENERATED_CLK
+ select HAVE_AT91_SAM9X60_PLL
+ select HAVE_AT91_USB_CLK
+ select HAVE_AT91_UTMI
+ select SOC_SAMA7
+ help
+ Select this if you are using one of Microchip's SAMA7D65 family SoC.
+
config SOC_SAMA7G5
bool "SAMA7G5 family"
depends on ARCH_MULTI_V7
@@ -97,7 +112,6 @@ config SOC_AT91SAM9
depends on ARCH_MULTI_V5
select ATMEL_AIC_IRQ
select ATMEL_PM if PM
- select ATMEL_SDRAMC
select CPU_ARM926T
select HAVE_AT91_SMD
select HAVE_AT91_USB_CLK
@@ -131,7 +145,6 @@ config SOC_SAM9X60
depends on ARCH_MULTI_V5
select ATMEL_AIC5_IRQ
select ATMEL_PM if PM
- select ATMEL_SDRAMC
select CPU_ARM926T
select HAVE_AT91_USB_CLK
select HAVE_AT91_GENERATED_CLK
@@ -143,11 +156,27 @@ config SOC_SAM9X60
help
Select this if you are using Microchip's SAM9X60 SoC
+config SOC_SAM9X7
+ bool "SAM9X7"
+ depends on ARCH_MULTI_V5
+ select ATMEL_AIC5_IRQ
+ select ATMEL_PM if PM
+ select CPU_ARM926T
+ select HAVE_AT91_USB_CLK
+ select HAVE_AT91_GENERATED_CLK
+ select HAVE_AT91_SAM9X60_PLL
+ select MEMORY
+ select PINCTRL_AT91
+ select SOC_SAM_V4_V5
+ select SRAM if PM
+ help
+ Select this if you are using Microchip's SAM9X7 SoC
+
comment "Clocksource driver selection"
config ATMEL_CLOCKSOURCE_PIT
bool "Periodic Interval Timer (PIT) support"
- depends on SOC_AT91SAM9 || SOC_SAM9X60 || SOC_SAMA5
+ depends on SOC_AT91SAM9 || SOC_SAM9X60 || SOC_SAM9X7 || SOC_SAMA5
default SOC_AT91SAM9 || SOC_SAMA5
select ATMEL_PIT
help
@@ -157,7 +186,7 @@ config ATMEL_CLOCKSOURCE_PIT
config ATMEL_CLOCKSOURCE_TCB
bool "Timer Counter Blocks (TCB) support"
- default SOC_AT91RM9200 || SOC_AT91SAM9 || SOC_SAM9X60 || SOC_SAMA5
+ default SOC_AT91RM9200 || SOC_AT91SAM9 || SOC_SAM9X60 || SOC_SAM9X7 || SOC_SAMA5
select ATMEL_TCB_CLKSRC
help
Select this to get a high precision clocksource based on a
@@ -168,7 +197,7 @@ config ATMEL_CLOCKSOURCE_TCB
config MICROCHIP_CLOCKSOURCE_PIT64B
bool "64-bit Periodic Interval Timer (PIT64B) support"
- default SOC_SAM9X60 || SOC_SAMA7
+ default SOC_SAM9X60 || SOC_SAM9X7 || SOC_SAMA7
select MICROCHIP_PIT64B
help
Select this to get a high resolution clockevent (SAM9X60) or
@@ -213,7 +242,6 @@ config SOC_SAMA5
bool
select ATMEL_AIC5_IRQ
select ATMEL_PM if PM
- select ATMEL_SDRAMC
select MEMORY
select SOC_SAM_V7
select SRAM if PM
@@ -234,7 +262,6 @@ config SOC_SAMA7
bool
select ARM_GIC
select ATMEL_PM if PM
- select ATMEL_SDRAMC
select MEMORY
select SOC_SAM_V7
select SRAM if PM
diff --git a/arch/arm/mach-at91/Makefile b/arch/arm/mach-at91/Makefile
index 794bd12ab0a8..7d8a7bc44e65 100644
--- a/arch/arm/mach-at91/Makefile
+++ b/arch/arm/mach-at91/Makefile
@@ -7,6 +7,7 @@
obj-$(CONFIG_SOC_AT91RM9200) += at91rm9200.o
obj-$(CONFIG_SOC_AT91SAM9) += at91sam9.o
obj-$(CONFIG_SOC_SAM9X60) += sam9x60.o
+obj-$(CONFIG_SOC_SAM9X7) += sam9x7.o
obj-$(CONFIG_SOC_SAMA5) += sama5.o sam_secure.o
obj-$(CONFIG_SOC_SAMA7) += sama7.o
obj-$(CONFIG_SOC_SAMV7) += samv7.o
diff --git a/arch/arm/mach-at91/generic.h b/arch/arm/mach-at91/generic.h
index 0c3960a8b3eb..acf0b3c82a30 100644
--- a/arch/arm/mach-at91/generic.h
+++ b/arch/arm/mach-at91/generic.h
@@ -12,6 +12,7 @@
extern void __init at91rm9200_pm_init(void);
extern void __init at91sam9_pm_init(void);
extern void __init sam9x60_pm_init(void);
+extern void __init sam9x7_pm_init(void);
extern void __init sama5_pm_init(void);
extern void __init sama5d2_pm_init(void);
extern void __init sama7_pm_init(void);
@@ -19,6 +20,7 @@ extern void __init sama7_pm_init(void);
static inline void __init at91rm9200_pm_init(void) { }
static inline void __init at91sam9_pm_init(void) { }
static inline void __init sam9x60_pm_init(void) { }
+static inline void __init sam9x7_pm_init(void) { }
static inline void __init sama5_pm_init(void) { }
static inline void __init sama5d2_pm_init(void) { }
static inline void __init sama7_pm_init(void) { }
diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index 60dc56d8acfb..35058b99069c 100644
--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -12,6 +12,7 @@
#include <linux/of.h>
#include <linux/of_fdt.h>
#include <linux/of_platform.h>
+#include <linux/platform_device.h>
#include <linux/parser.h>
#include <linux/suspend.h>
@@ -221,17 +222,27 @@ static const struct of_device_id sam9x60_ws_ids[] = {
{ /* sentinel */ }
};
-static const struct of_device_id sama7g5_ws_ids[] = {
+static const struct of_device_id sama7_ws_ids[] = {
+ { .compatible = "microchip,sama7d65-rtc", .data = &ws_info[1] },
{ .compatible = "microchip,sama7g5-rtc", .data = &ws_info[1] },
{ .compatible = "microchip,sama7g5-ohci", .data = &ws_info[2] },
{ .compatible = "usb-ohci", .data = &ws_info[2] },
{ .compatible = "atmel,at91sam9g45-ehci", .data = &ws_info[2] },
{ .compatible = "usb-ehci", .data = &ws_info[2] },
+ { .compatible = "microchip,sama7d65-sdhci", .data = &ws_info[3] },
{ .compatible = "microchip,sama7g5-sdhci", .data = &ws_info[3] },
+ { .compatible = "microchip,sama7d65-rtt", .data = &ws_info[4] },
{ .compatible = "microchip,sama7g5-rtt", .data = &ws_info[4] },
{ /* sentinel */ }
};
+static const struct of_device_id sam9x7_ws_ids[] = {
+ { .compatible = "microchip,sam9x7-rtc", .data = &ws_info[1] },
+ { .compatible = "microchip,sam9x7-rtt", .data = &ws_info[4] },
+ { .compatible = "microchip,sam9x7-gem", .data = &ws_info[5] },
+ { /* sentinel */ }
+};
+
static int at91_pm_config_ws(unsigned int pm_mode, bool set)
{
const struct wakeup_source_info *wsi;
@@ -334,16 +345,14 @@ static bool at91_pm_eth_quirk_is_valid(struct at91_pm_quirk_eth *eth)
pdev = of_find_device_by_node(eth->np);
if (!pdev)
return false;
+ /* put_device(eth->dev) is called at the end of suspend. */
eth->dev = &pdev->dev;
}
/* No quirks if device isn't a wakeup source. */
- if (!device_may_wakeup(eth->dev)) {
- put_device(eth->dev);
+ if (!device_may_wakeup(eth->dev))
return false;
- }
- /* put_device(eth->dev) is called at the end of suspend. */
return true;
}
@@ -439,14 +448,14 @@ clk_unconfigure:
pr_err("AT91: PM: failed to enable %s clocks\n",
j == AT91_PM_G_ETH ? "geth" : "eth");
}
- } else {
- /*
- * Release the reference to eth->dev taken in
- * at91_pm_eth_quirk_is_valid().
- */
- put_device(eth->dev);
- eth->dev = NULL;
}
+
+ /*
+ * Release the reference to eth->dev taken in
+ * at91_pm_eth_quirk_is_valid().
+ */
+ put_device(eth->dev);
+ eth->dev = NULL;
}
return ret;
@@ -539,11 +548,12 @@ extern u32 at91_pm_suspend_in_sram_sz;
static int at91_suspend_finish(unsigned long val)
{
- unsigned char modified_gray_code[] = {
- 0x00, 0x01, 0x02, 0x03, 0x06, 0x07, 0x04, 0x05, 0x0c, 0x0d,
- 0x0e, 0x0f, 0x0a, 0x0b, 0x08, 0x09, 0x18, 0x19, 0x1a, 0x1b,
- 0x1e, 0x1f, 0x1c, 0x1d, 0x14, 0x15, 0x16, 0x17, 0x12, 0x13,
- 0x10, 0x11,
+ /* SYNOPSYS workaround to fix a bug in the calibration logic */
+ unsigned char modified_fix_code[] = {
+ 0x00, 0x01, 0x01, 0x06, 0x07, 0x0c, 0x06, 0x07, 0x0b, 0x18,
+ 0x0a, 0x0b, 0x0c, 0x0d, 0x0d, 0x0a, 0x13, 0x13, 0x12, 0x13,
+ 0x14, 0x15, 0x15, 0x12, 0x18, 0x19, 0x19, 0x1e, 0x1f, 0x14,
+ 0x1e, 0x1f,
};
unsigned int tmp, index;
int i;
@@ -554,25 +564,25 @@ static int at91_suspend_finish(unsigned long val)
* restore the ZQ0SR0 with the value saved here. But the
* calibration is buggy and restoring some values from ZQ0SR0
* is forbidden and risky thus we need to provide processed
- * values for these (modified gray code values).
+ * values for these.
*/
tmp = readl(soc_pm.data.ramc_phy + DDR3PHY_ZQ0SR0);
/* Store pull-down output impedance select. */
index = (tmp >> DDR3PHY_ZQ0SR0_PDO_OFF) & 0x1f;
- soc_pm.bu->ddr_phy_calibration[0] = modified_gray_code[index];
+ soc_pm.bu->ddr_phy_calibration[0] = modified_fix_code[index] << DDR3PHY_ZQ0SR0_PDO_OFF;
/* Store pull-up output impedance select. */
index = (tmp >> DDR3PHY_ZQ0SR0_PUO_OFF) & 0x1f;
- soc_pm.bu->ddr_phy_calibration[0] |= modified_gray_code[index];
+ soc_pm.bu->ddr_phy_calibration[0] |= modified_fix_code[index] << DDR3PHY_ZQ0SR0_PUO_OFF;
/* Store pull-down on-die termination impedance select. */
index = (tmp >> DDR3PHY_ZQ0SR0_PDODT_OFF) & 0x1f;
- soc_pm.bu->ddr_phy_calibration[0] |= modified_gray_code[index];
+ soc_pm.bu->ddr_phy_calibration[0] |= modified_fix_code[index] << DDR3PHY_ZQ0SR0_PDODT_OFF;
/* Store pull-up on-die termination impedance select. */
index = (tmp >> DDR3PHY_ZQ0SRO_PUODT_OFF) & 0x1f;
- soc_pm.bu->ddr_phy_calibration[0] |= modified_gray_code[index];
+ soc_pm.bu->ddr_phy_calibration[0] |= modified_fix_code[index] << DDR3PHY_ZQ0SRO_PUODT_OFF;
/*
* The 1st 8 words of memory might get corrupted in the process
@@ -592,7 +602,21 @@ static int at91_suspend_finish(unsigned long val)
return 0;
}
-static void at91_pm_switch_ba_to_vbat(void)
+/**
+ * at91_pm_switch_ba_to_auto() - Configure Backup Unit Power Switch
+ * to automatic/hardware mode.
+ *
+ * The Backup Unit Power Switch can be managed either by software or hardware.
+ * Enabling hardware mode allows the automatic transition of power between
+ * VDDANA (or VDDIN33) and VDDBU (or VBAT, respectively), based on the
+ * availability of these power sources.
+ *
+ * If the Backup Unit Power Switch is already in automatic mode, no action is
+ * required. If it is in software-controlled mode, it is switched to automatic
+ * mode to enhance safety and eliminate the need for toggling between power
+ * sources.
+ */
+static void at91_pm_switch_ba_to_auto(void)
{
unsigned int offset = offsetof(struct at91_pm_sfrbu_regs, pswbu);
unsigned int val;
@@ -603,24 +627,19 @@ static void at91_pm_switch_ba_to_vbat(void)
val = readl(soc_pm.data.sfrbu + offset);
- /* Already on VBAT. */
- if (!(val & soc_pm.sfrbu_regs.pswbu.state))
+ /* Already on auto/hardware. */
+ if (!(val & soc_pm.sfrbu_regs.pswbu.ctrl))
return;
- val &= ~soc_pm.sfrbu_regs.pswbu.softsw;
- val |= soc_pm.sfrbu_regs.pswbu.key | soc_pm.sfrbu_regs.pswbu.ctrl;
+ val &= ~soc_pm.sfrbu_regs.pswbu.ctrl;
+ val |= soc_pm.sfrbu_regs.pswbu.key;
writel(val, soc_pm.data.sfrbu + offset);
-
- /* Wait for update. */
- val = readl(soc_pm.data.sfrbu + offset);
- while (val & soc_pm.sfrbu_regs.pswbu.state)
- val = readl(soc_pm.data.sfrbu + offset);
}
static void at91_pm_suspend(suspend_state_t state)
{
if (soc_pm.data.mode == AT91_PM_BACKUP) {
- at91_pm_switch_ba_to_vbat();
+ at91_pm_switch_ba_to_auto();
cpu_suspend(0, at91_suspend_finish);
@@ -628,6 +647,11 @@ static void at91_pm_suspend(suspend_state_t state)
at91_suspend_sram_fn = fncpy(at91_suspend_sram_fn,
&at91_pm_suspend_in_sram,
at91_pm_suspend_in_sram_sz);
+
+ if (IS_ENABLED(CONFIG_SOC_SAMA7D65)) {
+ /* SHDWC.SR */
+ readl(soc_pm.data.shdwc + 0x08);
+ }
} else {
at91_suspend_finish(0);
}
@@ -1046,7 +1070,8 @@ static int __init at91_pm_backup_init(void)
int ret = -ENODEV, located = 0;
if (!IS_ENABLED(CONFIG_SOC_SAMA5D2) &&
- !IS_ENABLED(CONFIG_SOC_SAMA7G5))
+ !IS_ENABLED(CONFIG_SOC_SAMA7G5) &&
+ !IS_ENABLED(CONFIG_SOC_SAMA7D65))
return -EPERM;
if (!at91_is_pm_mode_active(AT91_PM_BACKUP))
@@ -1104,6 +1129,7 @@ static void __init at91_pm_secure_init(void)
if (res.a0 == 0) {
pr_info("AT91: Secure PM: suspend mode set to %s\n",
pm_modes[suspend_mode].pattern);
+ soc_pm.data.mode = suspend_mode;
return;
}
@@ -1113,6 +1139,7 @@ static void __init at91_pm_secure_init(void)
res = sam_smccc_call(SAMA5_SMC_SIP_GET_SUSPEND_MODE, 0, 0);
if (res.a0 == 0) {
pr_warn("AT91: Secure PM: failed to get default mode\n");
+ soc_pm.data.mode = -1;
return;
}
@@ -1120,6 +1147,7 @@ static void __init at91_pm_secure_init(void)
pm_modes[suspend_mode].pattern);
soc_pm.data.suspend_mode = res.a1;
+ soc_pm.data.mode = soc_pm.data.suspend_mode;
}
static const struct of_device_id atmel_shdwc_ids[] = {
{ .compatible = "atmel,sama5d2-shdwc" },
@@ -1311,6 +1339,7 @@ struct pmc_info {
unsigned long uhp_udp_mask;
unsigned long mckr;
unsigned long version;
+ unsigned long mcks;
};
static const struct pmc_info pmc_infos[] __initconst = {
@@ -1335,15 +1364,21 @@ static const struct pmc_info pmc_infos[] __initconst = {
.version = AT91_PMC_V1,
},
{
- .uhp_udp_mask = AT91SAM926x_PMC_UHP | AT91SAM926x_PMC_UDP,
+ .uhp_udp_mask = AT91SAM926x_PMC_UHP,
.mckr = 0x28,
.version = AT91_PMC_V2,
},
{
.mckr = 0x28,
.version = AT91_PMC_V2,
+ .mcks = 4,
+ },
+ {
+ .uhp_udp_mask = AT91SAM926x_PMC_UHP,
+ .mckr = 0x28,
+ .version = AT91_PMC_V2,
+ .mcks = 9,
},
-
};
static const struct of_device_id atmel_pmc_ids[] __initconst = {
@@ -1359,6 +1394,8 @@ static const struct of_device_id atmel_pmc_ids[] __initconst = {
{ .compatible = "atmel,sama5d4-pmc", .data = &pmc_infos[1] },
{ .compatible = "atmel,sama5d2-pmc", .data = &pmc_infos[1] },
{ .compatible = "microchip,sam9x60-pmc", .data = &pmc_infos[4] },
+ { .compatible = "microchip,sam9x7-pmc", .data = &pmc_infos[4] },
+ { .compatible = "microchip,sama7d65-pmc", .data = &pmc_infos[6] },
{ .compatible = "microchip,sama7g5-pmc", .data = &pmc_infos[5] },
{ /* sentinel */ },
};
@@ -1429,6 +1466,7 @@ static void __init at91_pm_init(void (*pm_idle)(void))
soc_pm.data.uhp_udp_mask = pmc->uhp_udp_mask;
soc_pm.data.pmc_mckr_offset = pmc->mckr;
soc_pm.data.pmc_version = pmc->version;
+ soc_pm.data.pmc_mcks = pmc->mcks;
if (pm_idle)
arm_pm_idle = pm_idle;
@@ -1497,6 +1535,27 @@ void __init sam9x60_pm_init(void)
soc_pm.config_pmc_ws = at91_sam9x60_config_pmc_ws;
}
+void __init sam9x7_pm_init(void)
+{
+ static const int modes[] __initconst = {
+ AT91_PM_STANDBY, AT91_PM_ULP0,
+ };
+ int ret;
+
+ if (!IS_ENABLED(CONFIG_SOC_SAM9X7))
+ return;
+
+ at91_pm_modes_validate(modes, ARRAY_SIZE(modes));
+ ret = at91_dt_ramc(false);
+ if (ret)
+ return;
+
+ at91_pm_init(NULL);
+
+ soc_pm.ws_ids = sam9x7_ws_ids;
+ soc_pm.config_pmc_ws = at91_sam9x60_config_pmc_ws;
+}
+
void __init at91sam9_pm_init(void)
{
int ret;
@@ -1631,7 +1690,7 @@ void __init sama7_pm_init(void)
at91_pm_modes_init(iomaps, ARRAY_SIZE(iomaps));
at91_pm_init(NULL);
- soc_pm.ws_ids = sama7g5_ws_ids;
+ soc_pm.ws_ids = sama7_ws_ids;
soc_pm.config_pmc_ws = at91_sam9x60_config_pmc_ws;
soc_pm.sfrbu_regs.pswbu.key = (0x4BD20C << 8);
diff --git a/arch/arm/mach-at91/pm.h b/arch/arm/mach-at91/pm.h
index 53bdc9000e44..50c3a425d140 100644
--- a/arch/arm/mach-at91/pm.h
+++ b/arch/arm/mach-at91/pm.h
@@ -39,6 +39,7 @@ struct at91_pm_data {
unsigned int suspend_mode;
unsigned int pmc_mckr_offset;
unsigned int pmc_version;
+ unsigned int pmc_mcks;
};
#endif
diff --git a/arch/arm/mach-at91/pm_data-offsets.c b/arch/arm/mach-at91/pm_data-offsets.c
index 40bd4e8fe40a..0ca5da66dc26 100644
--- a/arch/arm/mach-at91/pm_data-offsets.c
+++ b/arch/arm/mach-at91/pm_data-offsets.c
@@ -18,6 +18,8 @@ int main(void)
pmc_mckr_offset));
DEFINE(PM_DATA_PMC_VERSION, offsetof(struct at91_pm_data,
pmc_version));
+ DEFINE(PM_DATA_PMC_MCKS, offsetof(struct at91_pm_data,
+ pmc_mcks));
return 0;
}
diff --git a/arch/arm/mach-at91/pm_suspend.S b/arch/arm/mach-at91/pm_suspend.S
index e5869cca5e79..2e639f9ed648 100644
--- a/arch/arm/mach-at91/pm_suspend.S
+++ b/arch/arm/mach-at91/pm_suspend.S
@@ -87,29 +87,6 @@ tmp3 .req r6
.endm
-/**
- * Set state for 2.5V low power regulator
- * @ena: 0 - disable regulator
- * 1 - enable regulator
- *
- * Side effects: overwrites r7, r8, r9, r10
- */
- .macro at91_2_5V_reg_set_low_power ena
-#ifdef CONFIG_SOC_SAMA7
- ldr r7, .sfrbu
- mov r8, #\ena
- ldr r9, [r7, #AT91_SFRBU_25LDOCR]
- orr r9, r9, #AT91_SFRBU_25LDOCR_LP
- cmp r8, #1
- beq lp_done_\ena
- bic r9, r9, #AT91_SFRBU_25LDOCR_LP
-lp_done_\ena:
- ldr r10, =AT91_SFRBU_25LDOCR_LDOANAKEY
- orr r9, r9, r10
- str r9, [r7, #AT91_SFRBU_25LDOCR]
-#endif
- .endm
-
.macro at91_backup_set_lpm reg
#ifdef CONFIG_SOC_SAMA7
orr \reg, \reg, #0x200000
@@ -689,6 +666,10 @@ sr_dis_exit:
bic tmp2, tmp2, #AT91_PMC_PLL_UPDT_ID
str tmp2, [pmc, #AT91_PMC_PLL_UPDT]
+ /* save acr */
+ ldr tmp2, [pmc, #AT91_PMC_PLL_ACR]
+ str tmp2, .saved_acr
+
/* save div. */
mov tmp1, #0
ldr tmp2, [pmc, #AT91_PMC_PLL_CTRL0]
@@ -758,7 +739,7 @@ sr_dis_exit:
str tmp1, [pmc, #AT91_PMC_PLL_UPDT]
/* step 2. */
- ldr tmp1, =AT91_PMC_PLL_ACR_DEFAULT_PLLA
+ ldr tmp1, .saved_acr
str tmp1, [pmc, #AT91_PMC_PLL_ACR]
/* step 3. */
@@ -814,18 +795,20 @@ sr_dis_exit:
.endm
/**
- * at91_mckx_ps_enable: save MCK1..4 settings and switch it to main clock
+ * at91_mckx_ps_enable: save MCK settings and switch it to main clock
*
- * Side effects: overwrites tmp1, tmp2
+ * Side effects: overwrites tmp1, tmp2, tmp3
*/
.macro at91_mckx_ps_enable
#ifdef CONFIG_SOC_SAMA7
ldr pmc, .pmc_base
+ ldr tmp3, .mcks
- /* There are 4 MCKs we need to handle: MCK1..4 */
+ /* Start at MCK1 and go until MCKs */
mov tmp1, #1
-e_loop: cmp tmp1, #5
- beq e_done
+e_loop:
+ cmp tmp1, tmp3
+ bgt e_done
/* Write MCK ID to retrieve the settings. */
str tmp1, [pmc, #AT91_PMC_MCR_V2]
@@ -850,7 +833,37 @@ e_save_mck3:
b e_ps
e_save_mck4:
+ cmp tmp1, #4
+ bne e_save_mck5
str tmp2, .saved_mck4
+ b e_ps
+
+e_save_mck5:
+ cmp tmp1, #5
+ bne e_save_mck6
+ str tmp2, .saved_mck5
+ b e_ps
+
+e_save_mck6:
+ cmp tmp1, #6
+ bne e_save_mck7
+ str tmp2, .saved_mck6
+ b e_ps
+
+e_save_mck7:
+ cmp tmp1, #7
+ bne e_save_mck8
+ str tmp2, .saved_mck7
+ b e_ps
+
+e_save_mck8:
+ cmp tmp1, #8
+ bne e_save_mck9
+ str tmp2, .saved_mck8
+ b e_ps
+
+e_save_mck9:
+ str tmp2, .saved_mck9
e_ps:
/* Use CSS=MAINCK and DIV=1. */
@@ -870,18 +883,20 @@ e_done:
.endm
/**
- * at91_mckx_ps_restore: restore MCK1..4 settings
+ * at91_mckx_ps_restore: restore MCKx settings
*
- * Side effects: overwrites tmp1, tmp2
+ * Side effects: overwrites tmp1, tmp2 and tmp3
*/
.macro at91_mckx_ps_restore
#ifdef CONFIG_SOC_SAMA7
ldr pmc, .pmc_base
+ ldr tmp2, .mcks
- /* There are 4 MCKs we need to handle: MCK1..4 */
+ /* Start from MCK1 and go up to MCKs */
mov tmp1, #1
-r_loop: cmp tmp1, #5
- beq r_done
+r_loop:
+ cmp tmp1, tmp2
+ bgt r_done
r_save_mck1:
cmp tmp1, #1
@@ -902,7 +917,37 @@ r_save_mck3:
b r_ps
r_save_mck4:
+ cmp tmp1, #4
+ bne r_save_mck5
ldr tmp2, .saved_mck4
+ b r_ps
+
+r_save_mck5:
+ cmp tmp1, #5
+ bne r_save_mck6
+ ldr tmp2, .saved_mck5
+ b r_ps
+
+r_save_mck6:
+ cmp tmp1, #6
+ bne r_save_mck7
+ ldr tmp2, .saved_mck6
+ b r_ps
+
+r_save_mck7:
+ cmp tmp1, #7
+ bne r_save_mck8
+ ldr tmp2, .saved_mck7
+ b r_ps
+
+r_save_mck8:
+ cmp tmp1, #8
+ bne r_save_mck9
+ ldr tmp2, .saved_mck8
+ b r_ps
+
+r_save_mck9:
+ ldr tmp2, .saved_mck9
r_ps:
/* Write MCK ID to retrieve the settings. */
@@ -916,11 +961,12 @@ r_ps:
bic tmp3, tmp3, #AT91_PMC_MCR_V2_ID_MSK
orr tmp3, tmp3, tmp1
orr tmp3, tmp3, #AT91_PMC_MCR_V2_CMD
- str tmp2, [pmc, #AT91_PMC_MCR_V2]
+ str tmp3, [pmc, #AT91_PMC_MCR_V2]
wait_mckrdy tmp1
add tmp1, tmp1, #1
+ ldr tmp2, .mcks
b r_loop
r_done:
#endif
@@ -954,9 +1000,6 @@ save_mck:
at91_plla_disable
- /* Enable low power mode for 2.5V regulator. */
- at91_2_5V_reg_set_low_power 1
-
ldr tmp3, .pm_mode
cmp tmp3, #AT91_PM_ULP1
beq ulp1_mode
@@ -969,9 +1012,6 @@ ulp1_mode:
b ulp_exit
ulp_exit:
- /* Disable low power mode for 2.5V regulator. */
- at91_2_5V_reg_set_low_power 0
-
ldr pmc, .pmc_base
at91_plla_enable
@@ -1045,6 +1085,10 @@ ENTRY(at91_pm_suspend_in_sram)
str tmp1, .memtype
ldr tmp1, [r0, #PM_DATA_MODE]
str tmp1, .pm_mode
+#ifdef CONFIG_SOC_SAMA7
+ ldr tmp1, [r0, #PM_DATA_PMC_MCKS]
+ str tmp1, .mcks
+#endif
/*
* ldrne below are here to preload their address in the TLB as access
@@ -1132,8 +1176,14 @@ ENDPROC(at91_pm_suspend_in_sram)
.word 0
.pmc_version:
.word 0
+#ifdef CONFIG_SOC_SAMA7
+.mcks:
+ .word 0
+#endif
.saved_mckr:
.word 0
+.saved_acr:
+ .word 0
.saved_pllar:
.word 0
.saved_sam9_lpr:
@@ -1155,6 +1205,16 @@ ENDPROC(at91_pm_suspend_in_sram)
.word 0
.saved_mck4:
.word 0
+.saved_mck5:
+ .word 0
+.saved_mck6:
+ .word 0
+.saved_mck7:
+ .word 0
+.saved_mck8:
+ .word 0
+.saved_mck9:
+ .word 0
#endif
ENTRY(at91_pm_suspend_in_sram_sz)
diff --git a/arch/arm/mach-at91/sam9x7.c b/arch/arm/mach-at91/sam9x7.c
new file mode 100644
index 000000000000..e1ff30b5b09b
--- /dev/null
+++ b/arch/arm/mach-at91/sam9x7.c
@@ -0,0 +1,33 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Setup code for SAM9X7.
+ *
+ * Copyright (C) 2023 Microchip Technology Inc. and its subsidiaries
+ *
+ * Author: Varshini Rajendran <varshini.rajendran@microchip.com>
+ */
+
+#include <linux/of.h>
+#include <linux/of_platform.h>
+
+#include <asm/mach/arch.h>
+
+#include "generic.h"
+
+static void __init sam9x7_init(void)
+{
+ of_platform_default_populate(NULL, NULL, NULL);
+
+ sam9x7_pm_init();
+}
+
+static const char * const sam9x7_dt_board_compat[] __initconst = {
+ "microchip,sam9x7",
+ NULL
+};
+
+DT_MACHINE_START(sam9x7_dt, "Microchip SAM9X7")
+ /* Maintainer: Microchip */
+ .init_machine = sam9x7_init,
+ .dt_compat = sam9x7_dt_board_compat,
+MACHINE_END
diff --git a/arch/arm/mach-at91/samv7.c b/arch/arm/mach-at91/samv7.c
index 28f998f0fba5..22d00005ec09 100644
--- a/arch/arm/mach-at91/samv7.c
+++ b/arch/arm/mach-at91/samv7.c
@@ -5,14 +5,7 @@
* Copyright (C) 2013 Atmel,
* 2016 Andras Szemzo <szemzo.andras@gmail.com>
*/
-#include <linux/of.h>
-#include <linux/of_platform.h>
-#include <linux/of_address.h>
-#include <linux/slab.h>
#include <asm/mach/arch.h>
-#include <asm/mach/map.h>
-#include <asm/system_misc.h>
-#include "generic.h"
static const char *const samv7_dt_board_compat[] __initconst = {
"atmel,samv7",
generated by cgit (git 2.34.1) at 2025-12-25 06:38:48 +0000