Merge tag 'v2022.04-rc5' into next

Prepare v2022.04-rc5

4 files changed, 33 insertions, 2 deletions

diff --git a/drivers/ram/rockchip/sdram_rk3188.c b/drivers/ram/rockchip/sdram_rk3188.c
index d9ed8ad..be8ba44 100644
--- a/drivers/ram/rockchip/sdram_rk3188.c
+++ b/drivers/ram/rockchip/sdram_rk3188.c
@@ -762,7 +762,7 @@ static int sdram_init(struct dram_info *dram,
 		 * CS1, n=2
 		 * CS0 & CS1, n = 3
 		 */
-		sdram_params->ch[channel].rank = 2,
+		sdram_params->ch[channel].rank = 2;
 		clrsetbits_le32(&publ->pgcr, 0xF << 18,
 				(sdram_params->ch[channel].rank | 1) << 18);
 
diff --git a/drivers/ram/rockchip/sdram_rk3288.c b/drivers/ram/rockchip/sdram_rk3288.c
index f3e4a28..227a3cc 100644
--- a/drivers/ram/rockchip/sdram_rk3288.c
+++ b/drivers/ram/rockchip/sdram_rk3288.c
@@ -862,7 +862,7 @@ static int sdram_init(struct dram_info *dram,
 		 * CS1, n=2
 		 * CS0 & CS1, n = 3
 		 */
-		sdram_params->ch[channel].rank = 2,
+		sdram_params->ch[channel].rank = 2;
 		clrsetbits_le32(&publ->pgcr, 0xF << 18,
 				(sdram_params->ch[channel].rank | 1) << 18);
 
diff --git a/drivers/ram/stm32mp1/stm32mp1_ddr.c b/drivers/ram/stm32mp1/stm32mp1_ddr.c
index 4d78aa5..528a171 100644
--- a/drivers/ram/stm32mp1/stm32mp1_ddr.c
+++ b/drivers/ram/stm32mp1/stm32mp1_ddr.c
@@ -27,6 +27,8 @@
 #define RCC_DDRITFCR_DPHYAPBRST		(BIT(17))
 #define RCC_DDRITFCR_DPHYRST		(BIT(18))
 #define RCC_DDRITFCR_DPHYCTLRST		(BIT(19))
+#define RCC_DDRITFCR_DDRCKMOD_MASK	GENMASK(22, 20)
+#define RCC_DDRITFCR_DDRCKMOD_ASR	BIT(20)
 
 struct reg_desc {
 	const char *name;
@@ -651,6 +653,26 @@ static void stm32mp1_refresh_restore(struct stm32mp1_ddrctl *ctl,
 	wait_sw_done_ack(ctl);
 }
 
+static void stm32mp1_asr_enable(struct ddr_info *priv)
+{
+	struct stm32mp1_ddrctl *ctl = priv->ctl;
+
+	clrsetbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DDRCKMOD_MASK,
+			RCC_DDRITFCR_DDRCKMOD_ASR);
+
+	start_sw_done(ctl);
+
+	setbits_le32(&ctl->hwlpctl, DDRCTRL_HWLPCTL_HW_LP_EN);
+	writel(DDRCTRL_PWRTMG_POWERDOWN_TO_X32(0x10) |
+	       DDRCTRL_PWRTMG_SELFREF_TO_X32(0x01),
+	       &ctl->pwrtmg);
+	setbits_le32(&ctl->pwrctl, DDRCTRL_PWRCTL_EN_DFI_DRAM_CLK_DISABLE);
+	setbits_le32(&ctl->pwrctl, DDRCTRL_PWRCTL_SELFREF_EN);
+
+	setbits_le32(&ctl->dfimisc, DDRCTRL_DFIMISC_DFI_INIT_COMPLETE_EN);
+	wait_sw_done_ack(ctl);
+}
+
 /* board-specific DDR power initializations. */
 __weak int board_ddr_power_init(enum ddr_type ddr_type)
 {
@@ -822,6 +844,9 @@ start:
 	stm32mp1_refresh_restore(priv->ctl, config->c_reg.rfshctl3,
 				 config->c_reg.pwrctl);
 
+/* Enable auto-self-refresh, which saves a bit of power at runtime. */
+	stm32mp1_asr_enable(priv);
+
 	/* enable uMCTL2 AXI port 0 and 1 */
 	setbits_le32(&priv->ctl->pctrl_0, DDRCTRL_PCTRL_N_PORT_EN);
 	setbits_le32(&priv->ctl->pctrl_1, DDRCTRL_PCTRL_N_PORT_EN);
diff --git a/drivers/ram/stm32mp1/stm32mp1_ddr_regs.h b/drivers/ram/stm32mp1/stm32mp1_ddr_regs.h
index f1a26e3..42be1ba 100644
--- a/drivers/ram/stm32mp1/stm32mp1_ddr_regs.h
+++ b/drivers/ram/stm32mp1/stm32mp1_ddr_regs.h
@@ -265,8 +265,14 @@ struct stm32mp1_ddrphy {
 
 #define DDRCTRL_PWRCTL_SELFREF_EN		BIT(0)
 #define DDRCTRL_PWRCTL_POWERDOWN_EN		BIT(1)
+#define DDRCTRL_PWRCTL_EN_DFI_DRAM_CLK_DISABLE	BIT(3)
 #define DDRCTRL_PWRCTL_SELFREF_SW		BIT(5)
 
+#define DDRCTRL_PWRTMG_SELFREF_TO_X32(n)	(((n) & 0xff) << 16)
+#define DDRCTRL_PWRTMG_POWERDOWN_TO_X32(n)	((n) & 0x1f)
+
+#define DDRCTRL_HWLPCTL_HW_LP_EN		BIT(0)
+
 #define DDRCTRL_RFSHCTL3_DIS_AUTO_REFRESH	BIT(0)
 
 #define DDRCTRL_RFSHTMG_T_RFC_NOM_X1_X32_MASK	GENMASK(27, 16)