Merge tag 'imx-soc-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into arm/fixes

i.MX SoC changes for 5.1:
 - Support cpuidle for i.MX7ULP, states WFI, WAIT and STOP get added.
 - Support SoC revision detecting for i.MX7ULP by reading JTAG_ID
   register from SIM module.
 - Select PM and GPCv2 irqchip driver options for i.MX8 support, as they
   are essential for building an i.MX8 based system.
 - Skip build of ssi-fiq code if SND_SOC_IMX_PCM_FIQ is not enabled.

* tag 'imx-soc-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux:
  arm64: imx8mq: select PM support
  arm64: imx8mq: select GPCv2 irqchip driver
  ARM: imx: add i.MX7ULP SoC revision support
  ARM: imx: add i.MX7ULP cpuidle support
  ARM: imx: don't build ssi-fiq if not required

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 46 insertions, 0 deletions

diff --git a/arch/arm/mach-imx/mach-imx7ulp.c b/arch/arm/mach-imx/mach-imx7ulp.c
index 33937ebf66b5..11ac71aaf965 100644
--- a/arch/arm/mach-imx/mach-imx7ulp.c
+++ b/arch/arm/mach-imx/mach-imx7ulp.c
@@ -6,17 +6,57 @@
  */
 
 #include <linux/irqchip.h>
+#include <linux/mfd/syscon.h>
 #include <linux/of_platform.h>
+#include <linux/regmap.h>
 #include <asm/mach/arch.h>
 
 #include "common.h"
+#include "cpuidle.h"
 #include "hardware.h"
 
+#define SIM_JTAG_ID_REG		0x8c
+
+static void __init imx7ulp_set_revision(void)
+{
+	struct regmap *sim;
+	u32 revision;
+
+	sim = syscon_regmap_lookup_by_compatible("fsl,imx7ulp-sim");
+	if (IS_ERR(sim)) {
+		pr_warn("failed to find fsl,imx7ulp-sim regmap!\n");
+		return;
+	}
+
+	if (regmap_read(sim, SIM_JTAG_ID_REG, &revision)) {
+		pr_warn("failed to read sim regmap!\n");
+		return;
+	}
+
+	/*
+	 * bit[31:28] of JTAG_ID register defines revision as below from B0:
+	 * 0001        B0
+	 * 0010        B1
+	 */
+	switch (revision >> 28) {
+	case 1:
+		imx_set_soc_revision(IMX_CHIP_REVISION_2_0);
+		break;
+	case 2:
+		imx_set_soc_revision(IMX_CHIP_REVISION_2_1);
+		break;
+	default:
+		imx_set_soc_revision(IMX_CHIP_REVISION_1_0);
+		break;
+	}
+}
+
 static void __init imx7ulp_init_machine(void)
 {
 	imx7ulp_pm_init();
 
 	mxc_set_cpu_type(MXC_CPU_IMX7ULP);
+	imx7ulp_set_revision();
 	of_platform_default_populate(NULL, NULL, imx_soc_device_init());
 }
 
@@ -25,7 +65,13 @@ static const char *const imx7ulp_dt_compat[] __initconst = {
 	NULL,
 };
 
+static void __init imx7ulp_init_late(void)
+{
+	imx7ulp_cpuidle_init();
+}
+
 DT_MACHINE_START(IMX7ulp, "Freescale i.MX7ULP (Device Tree)")
 	.init_machine	= imx7ulp_init_machine,
 	.dt_compat	= imx7ulp_dt_compat,
+	.init_late	= imx7ulp_init_late,
 MACHINE_END