soc: imx: Read imx8mm soc revision from anatop

Like on imx6/7 we can read version information from a register in
anatop, and in the same format.

Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/drivers/soc/imx/soc-imx8.c b/drivers/soc/imx/soc-imx8.c
index fc6429f..cd10726 100644 (file)
--- a/drivers/soc/imx/soc-imx8.c
+++ b/drivers/soc/imx/soc-imx8.c
@@ -16,6 +16,9 @@
 #define IMX8MQ_SW_INFO_B1              0x40
 #define IMX8MQ_SW_MAGIC_B1             0xff0055aa
 
+/* Same as ANADIG_DIGPROG_IMX7D */
+#define ANADIG_DIGPROG_IMX8MM  0x800
+
 struct imx8_soc_data {
        char *name;
        u32 (*soc_revision)(void);
@@ -46,13 +49,39 @@ out:
        return rev;
 }
 
+static u32 __init imx8mm_soc_revision(void)
+{
+       struct device_node *np;
+       void __iomem *anatop_base;
+       u32 rev;
+
+       np = of_find_compatible_node(NULL, NULL, "fsl,imx8mm-anatop");
+       if (!np)
+               return 0;
+
+       anatop_base = of_iomap(np, 0);
+       WARN_ON(!anatop_base);
+
+       rev = readl_relaxed(anatop_base + ANADIG_DIGPROG_IMX8MM);
+
+       iounmap(anatop_base);
+       of_node_put(np);
+       return rev;
+}
+
 static const struct imx8_soc_data imx8mq_soc_data = {
        .name = "i.MX8MQ",
        .soc_revision = imx8mq_soc_revision,
 };
 
+static const struct imx8_soc_data imx8mm_soc_data = {
+       .name = "i.MX8MM",
+       .soc_revision = imx8mm_soc_revision,
+};
+
 static const struct of_device_id imx8_soc_match[] = {
        { .compatible = "fsl,imx8mq", .data = &imx8mq_soc_data, },
+       { .compatible = "fsl,imx8mm", .data = &imx8mm_soc_data, },
        { }
 };