[PATCH V2 1/4] ARM: imx: add i.mx6ulz msl support

Anson Huang
2018-09-19T06:04:45Z

The i.MX 6ULZ processor is a high-performance, ultra
cost-efficient consumer Linux processor featuring an
advanced implementation of a single Arm® Cortex®-A7 core,
which operates at speeds up to 900 MHz.

This patch adds basic MSL support for i.MX6ULZ, the
i.MX6ULZ has same soc_id as i.MX6ULL, and SRC_SBMR2 bit[6]
is to differentiate i.MX6ULZ from i.MX6ULL, 1'b1 means
i.MX6ULZ and 1'b0 means i.MX6ULL.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
---
arch/arm/mach-imx/anatop.c | 20 ++++++++++++++++++++
arch/arm/mach-imx/cpu.c | 3 +++
arch/arm/mach-imx/mach-imx6ul.c | 1 +
arch/arm/mach-imx/mxc.h | 7 +++++++
arch/arm/mach-imx/pm-imx6.c | 4 ++--
5 files changed, 33 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-imx/anatop.c b/arch/arm/mach-imx/anatop.c
index 61f3d94..45d618a 100644
--- a/arch/arm/mach-imx/anatop.c
+++ b/arch/arm/mach-imx/anatop.c
@@ -31,6 +31,8 @@
#define ANADIG_DIGPROG_IMX6SL 0x280
#define ANADIG_DIGPROG_IMX7D 0x800

+#define SRC_SBMR2 0x1c
+
#define BM_ANADIG_REG_2P5_ENABLE_WEAK_LINREG 0x40000
#define BM_ANADIG_REG_2P5_ENABLE_PULLDOWN 0x8
#define BM_ANADIG_REG_CORE_FET_ODRIVE 0x20000000
@@ -148,6 +150,24 @@ void __init imx_init_revision_from_anatop(void)
major_part = (digprog >> 8) & 0xf;
minor_part = digprog & 0xf;
revision = ((major_part + 1) << 4) | minor_part;
+
+ if ((digprog >> 16) == MXC_CPU_IMX6ULL) {
+ void __iomem *src_base;
+ u32 sbmr2;
+
+ np = of_find_compatible_node(NULL, NULL,
+ "fsl,imx6ul-src");
+ src_base = of_iomap(np, 0);
+ WARN_ON(!src_base);
+ sbmr2 = readl_relaxed(src_base + SRC_SBMR2);
+ iounmap(src_base);
+
+ /* src_sbmr2 bit 6 is to identify if it is i.MX6ULZ */
+ if (sbmr2 & (1 << 6)) {
+ digprog &= ~(0xff << 16);
+ digprog |= (MXC_CPU_IMX6ULZ << 16);
+ }
+ }
}

mxc_set_cpu_type(digprog >> 16 & 0xff);
diff --git a/arch/arm/mach-imx/cpu.c b/arch/arm/mach-imx/cpu.c
index c6b1bf9..c73593e 100644
--- a/arch/arm/mach-imx/cpu.c
+++ b/arch/arm/mach-imx/cpu.c
@@ -136,6 +136,9 @@ struct device * __init imx_soc_device_init(void)
case MXC_CPU_IMX6ULL:
soc_id = "i.MX6ULL";
break;
+ case MXC_CPU_IMX6ULZ:
+ soc_id = "i.MX6ULZ";
+ break;
case MXC_CPU_IMX6SLL:
soc_id = "i.MX6SLL";
break;
diff --git a/arch/arm/mach-imx/mach-imx6ul.c b/arch/arm/mach-imx/mach-imx6ul.c
index 6cb8a22..4ffe3c8 100644
--- a/arch/arm/mach-imx/mach-imx6ul.c
+++ b/arch/arm/mach-imx/mach-imx6ul.c
@@ -90,6 +90,7 @@ static void __init imx6ul_init_late(void)
static const char * const imx6ul_dt_compat[] __initconst = {
"fsl,imx6ul",
"fsl,imx6ull",
+ "fsl,imx6ulz",
NULL,
};

diff --git a/arch/arm/mach-imx/mxc.h b/arch/arm/mach-imx/mxc.h
index 026e2ca..b130a53 100644
--- a/arch/arm/mach-imx/mxc.h
+++ b/arch/arm/mach-imx/mxc.h
@@ -40,6 +40,8 @@
#define MXC_CPU_IMX6Q 0x63
#define MXC_CPU_IMX6UL 0x64
#define MXC_CPU_IMX6ULL 0x65
+/* virtual cpu id for i.mx6ulz */
+#define MXC_CPU_IMX6ULZ 0x6b
#define MXC_CPU_IMX6SLL 0x67
#define MXC_CPU_IMX7D 0x72

@@ -80,6 +82,11 @@ static inline bool cpu_is_imx6ull(void)
return __mxc_cpu_type == MXC_CPU_IMX6ULL;
}

+static inline bool cpu_is_imx6ulz(void)
+{
+ return __mxc_cpu_type == MXC_CPU_IMX6ULZ;
+}
+
static inline bool cpu_is_imx6sll(void)
{
return __mxc_cpu_type == MXC_CPU_IMX6SLL;
diff --git a/arch/arm/mach-imx/pm-imx6.c b/arch/arm/mach-imx/pm-imx6.c
index 529f4b5..87f45b9 100644
--- a/arch/arm/mach-imx/pm-imx6.c
+++ b/arch/arm/mach-imx/pm-imx6.c
@@ -313,7 +313,7 @@ int imx6_set_lpm(enum mxc_cpu_pwr_mode mode)
if (cpu_is_imx6sl())
val |= BM_CLPCR_BYPASS_PMIC_READY;
if (cpu_is_imx6sl() || cpu_is_imx6sx() || cpu_is_imx6ul() ||
- cpu_is_imx6ull() || cpu_is_imx6sll())
+ cpu_is_imx6ull() || cpu_is_imx6sll() || cpu_is_imx6ulz())
val |= BM_CLPCR_BYP_MMDC_CH0_LPM_HS;
else
val |= BM_CLPCR_BYP_MMDC_CH1_LPM_HS;
@@ -331,7 +331,7 @@ int imx6_set_lpm(enum mxc_cpu_pwr_mode mode)
if (cpu_is_imx6sl() || cpu_is_imx6sx())
val |= BM_CLPCR_BYPASS_PMIC_READY;
if (cpu_is_imx6sl() || cpu_is_imx6sx() || cpu_is_imx6ul() ||
- cpu_is_imx6ull() || cpu_is_imx6sll())
+ cpu_is_imx6ull() || cpu_is_imx6sll() || cpu_is_imx6ulz())
val |= BM_CLPCR_BYP_MMDC_CH0_LPM_HS;
else
val |= BM_CLPCR_BYP_MMDC_CH1_LPM_HS;
--
2.7.4