Merge tag 'at91-soc-6.15' of https://git.kernel.org/pub/scm/linux/kernel/git/at91/linux into soc/arm

Microchip AT91 SoC updates for v6.15

This update includes:
- SoC driver support for Microchip SAMA7D65
- power management support for Microchip SAMA7D65
- power management fixes
- documentation fixes

* tag 'at91-soc-6.15' of https://git.kernel.org/pub/scm/linux/kernel/git/at91/linux:
  ARM: at91: pm: Enable ULP0/ULP1 for SAMA7D65
  ARM: at91: pm: Add Backup mode for SAMA7D65
  ARM: at91: pm: add DT compatible support for sama7d65
  ARM: at91: pm: fix at91_suspend_finish for ZQ calibration
  dt-bindings: ARM: at91: add Calao USB boards
  dt-bindings: ARM: at91: make separate entry for Olimex board
  ARM: at91: Add Support in SoC driver for SAMA7D65
  dt-bindings: atmel-sysreg: Add SAMA7D65 Chip ID

Link: https://lore.kernel.org/r/20250312173755.975074-2-claudiu.beznea@tuxon.dev
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

8 files changed, 168 insertions, 25 deletions

diff --git a/Documentation/devicetree/bindings/arm/atmel-at91.yaml b/Documentation/devicetree/bindings/arm/atmel-at91.yaml
index 0ec29366e6c2..3a34b7a2e8d4 100644
--- a/Documentation/devicetree/bindings/arm/atmel-at91.yaml
+++ b/Documentation/devicetree/bindings/arm/atmel-at91.yaml
@@ -23,8 +23,6 @@ properties:
           - const: atmel,at91rm9200
       - items:
           - enum:
-              - olimex,sam9-l9260
-          - enum:
               - atmel,at91sam9260
               - atmel,at91sam9261
               - atmel,at91sam9263
@@ -36,6 +34,37 @@ properties:
               - atmel,at91sam9x60
           - const: atmel,at91sam9
 
+      - description: Olimex SAM9-L9260
+        items:
+          - const: olimex,sam9-l9260
+          - const: atmel,at91sam9260
+          - const: atmel,at91sam9
+
+      - description: Calao USB A9260
+        items:
+          - const: calao,usb-a9260
+          - const: atmel,at91sam9260
+          - const: atmel,at91sam9
+
+      - description: Calao USB A9263
+        items:
+          - const: calao,usb-a9263
+          - const: atmel,at91sam9263
+          - const: atmel,at91sam9
+
+      - description: Calao USB A9G20
+        items:
+          - const: calao,usb-a9g20
+          - const: atmel,at91sam9g20
+          - const: atmel,at91sam9
+
+      - description: Calao USB A9G20-LPW
+        items:
+          - const: calao,usb-a9g20-lpw
+          - const: calao,usb-a9g20
+          - const: atmel,at91sam9g20
+          - const: atmel,at91sam9
+
       - items:
           - enum:
               - overkiz,kizboxmini-base # Overkiz kizbox Mini Base Board
diff --git a/Documentation/devicetree/bindings/arm/atmel-sysregs.txt b/Documentation/devicetree/bindings/arm/atmel-sysregs.txt
index 1a173e92bb13..d3821f651e72 100644
--- a/Documentation/devicetree/bindings/arm/atmel-sysregs.txt
+++ b/Documentation/devicetree/bindings/arm/atmel-sysregs.txt
@@ -2,6 +2,7 @@ Atmel system registers
 
 Chipid required properties:
 - compatible: Should be "atmel,sama5d2-chipid" or "microchip,sama7g5-chipid"
+			"microchip,sama7d65-chipid"
 - reg : Should contain registers location and length
 
 PIT Timer required properties:
diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index 05a1547642b6..3aa20038ad93 100644
--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -222,13 +222,16 @@ 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 */ }
 };
@@ -545,11 +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;
@@ -560,25 +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
@@ -643,6 +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);
 	}
@@ -1061,7 +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))
@@ -1329,6 +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 = {
@@ -1360,8 +1371,14 @@ static const struct pmc_info pmc_infos[] __initconst = {
 	{
 		.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 = {
@@ -1378,6 +1395,7 @@ static const struct of_device_id atmel_pmc_ids[] __initconst = {
 	{ .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 */ },
 };
@@ -1448,6 +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;
@@ -1671,7 +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..e23b86834096 100644
--- a/arch/arm/mach-at91/pm_suspend.S
+++ b/arch/arm/mach-at91/pm_suspend.S
@@ -814,18 +814,20 @@ 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 +852,37 @@ 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 +902,20 @@ e_done:
 .endm
 
 /**
- * at91_mckx_ps_restore: restore MCK1..4 settings
+ * at91_mckx_ps_restore: restore MCKx settings
  *
  * Side effects: overwrites tmp1, tmp2
  */
 .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 +936,37 @@ 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. */
@@ -921,6 +985,7 @@ r_ps:
 	wait_mckrdy tmp1
 
 	add	tmp1, tmp1, #1
+	ldr	tmp2, .mcks
 	b	r_loop
 r_done:
 #endif
@@ -1045,6 +1110,10 @@ 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
@@ -1132,6 +1201,10 @@ 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_pllar:
@@ -1155,6 +1228,16 @@ 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/drivers/soc/atmel/soc.c b/drivers/soc/atmel/soc.c
index 298b542dd1c0..09347bccdb1d 100644
--- a/drivers/soc/atmel/soc.c
+++ b/drivers/soc/atmel/soc.c
@@ -246,6 +246,9 @@ static const struct at91_soc socs[] __initconst = {
 		 "samv70q19", "samv7"),
 #endif
 #ifdef CONFIG_SOC_SAMA7
+	AT91_SOC(SAMA7D65_CIDR_MATCH, AT91_CIDR_MASK_SAMA7G5,
+		 AT91_CIDR_VERSION_MASK_SAMA7G5, SAMA7D65_EXID_MATCH,
+		 "sama7d65", "sama7d6"),
 	AT91_SOC(SAMA7G5_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
 		 AT91_CIDR_VERSION_MASK_SAMA7G5, SAMA7G51_EXID_MATCH,
 		 "sama7g51", "sama7g5"),
@@ -305,6 +308,7 @@ static int __init at91_get_cidr_exid_from_chipid(u32 *cidr, u32 *exid)
 	void __iomem *regs;
 	static const struct of_device_id chipids[] = {
 		{ .compatible = "atmel,sama5d2-chipid" },
+		{ .compatible = "microchip,sama7d65-chipid" },
 		{ .compatible = "microchip,sama7g5-chipid" },
 		{ },
 	};
@@ -393,6 +397,7 @@ static const struct of_device_id at91_soc_allowed_list[] __initconst = {
 	{ .compatible = "atmel,at91sam9", },
 	{ .compatible = "atmel,sama5", },
 	{ .compatible = "atmel,samv7", },
+	{ .compatible = "microchip,sama7d65", },
 	{ .compatible = "microchip,sama7g5", },
 	{ }
 };
diff --git a/drivers/soc/atmel/soc.h b/drivers/soc/atmel/soc.h
index 2c78e54255f7..66a74017d9a3 100644
--- a/drivers/soc/atmel/soc.h
+++ b/drivers/soc/atmel/soc.h
@@ -45,6 +45,7 @@ at91_soc_init(const struct at91_soc *socs);
 #define AT91SAM9N12_CIDR_MATCH		0x019a07a0
 #define SAM9X60_CIDR_MATCH		0x019b35a0
 #define SAM9X7_CIDR_MATCH		0x09750020
+#define SAMA7D65_CIDR_MATCH		0x00262100
 #define SAMA7G5_CIDR_MATCH		0x00162100
 
 #define AT91SAM9M11_EXID_MATCH		0x00000001
@@ -75,6 +76,8 @@ at91_soc_init(const struct at91_soc *socs);
 #define SAM9X75_D5M_EXID_MATCH		0x00000010
 #define SAM9X75_EXID_MATCH		0x00000000
 
+#define SAMA7D65_EXID_MATCH		0x00000080
+
 #define SAMA7G51_EXID_MATCH		0x3
 #define SAMA7G52_EXID_MATCH		0x2
 #define SAMA7G53_EXID_MATCH		0x1