ARM: imx: Deduplicate i.MX8M SNVS LPGPR unlock
Pull this LPGPR unlock into common code, since it is used in multiple
systems already.
Signed-off-by: Marek Vasut <marex@denx.de>
diff --git a/arch/arm/include/asm/arch-imx8m/imx-regs.h b/arch/arm/include/asm/arch-imx8m/imx-regs.h
index ff3b9dd..29d5baa 100644
--- a/arch/arm/include/asm/arch-imx8m/imx-regs.h
+++ b/arch/arm/include/asm/arch-imx8m/imx-regs.h
@@ -27,6 +27,7 @@
#define IOMUXC_GPR_BASE_ADDR 0x30340000
#define OCOTP_BASE_ADDR 0x30350000
#define ANATOP_BASE_ADDR 0x30360000
+#define SNVS_BASE_ADDR 0x30370000
#define CCM_BASE_ADDR 0x30380000
#define SRC_BASE_ADDR 0x30390000
#define GPC_BASE_ADDR 0x303A0000
@@ -113,6 +114,10 @@
#define SRC_DDR1_RCR_CORE_RESET_N_MASK BIT(1)
#define SRC_DDR1_RCR_PRESET_N_MASK BIT(0)
+#define SNVS_LPSR 0x4c
+#define SNVS_LPLVDR 0x64
+#define SNVS_LPPGDR_INIT 0x41736166
+
struct iomuxc_gpr_base_regs {
u32 gpr[47];
};
diff --git a/arch/arm/mach-imx/imx8m/soc.c b/arch/arm/mach-imx/imx8m/soc.c
index d115b25..5739546 100644
--- a/arch/arm/mach-imx/imx8m/soc.c
+++ b/arch/arm/mach-imx/imx8m/soc.c
@@ -544,6 +544,16 @@
}
EVENT_SPY(EVT_DM_POST_INIT, imx8m_check_clock);
+static void imx8m_setup_snvs(void)
+{
+ /* Enable SNVS clock */
+ clock_enable(CCGR_SNVS, 1);
+ /* Initialize glitch detect */
+ writel(SNVS_LPPGDR_INIT, SNVS_BASE_ADDR + SNVS_LPLVDR);
+ /* Clear interrupt status */
+ writel(0xffffffff, SNVS_BASE_ADDR + SNVS_LPSR);
+}
+
int arch_cpu_init(void)
{
struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR;
@@ -594,6 +604,8 @@
writel(0x200, &ocotp->ctrl_clr);
}
+ imx8m_setup_snvs();
+
return 0;
}