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soc: renesas: identify RZ/A2 

Add support for identifying the RZ/A2M (R7S9210) SoC.
Also add support for reading the BSID register which is a different format
than the PRR.

Signed-off-by: Chris Brandt <chris.brandt@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
This commit is contained in:
Chris Brandt 2018-07-27 11:53:32 -05:00 committed by Simon Horman
parent 332df9828e
commit 175f435f44
1 changed files with 47 additions and 8 deletions
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55
drivers/soc/renesas/renesas-soc.c
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@ -46,8 +46,12 @@ static const struct renesas_family fam_rmobile __initconst __maybe_unused = {
.reg = 0xe600101c, /* CCCR (Common Chip Code Register) */
};
static const struct renesas_family fam_rza __initconst __maybe_unused = {
.name = "RZ/A",
static const struct renesas_family fam_rza1 __initconst __maybe_unused = {
.name = "RZ/A1",
};
static const struct renesas_family fam_rza2 __initconst __maybe_unused = {
.name = "RZ/A2",
};
static const struct renesas_family fam_rzg1 __initconst __maybe_unused = {
@ -72,7 +76,12 @@ struct renesas_soc {
};
static const struct renesas_soc soc_rz_a1h __initconst __maybe_unused = {
.family = &fam_rza,
.family = &fam_rza1,
};
static const struct renesas_soc soc_rz_a2m __initconst __maybe_unused = {
.family = &fam_rza2,
.id = 0x3b,
};
static const struct renesas_soc soc_rmobile_ape6 __initconst __maybe_unused = {
@ -194,6 +203,9 @@ static const struct of_device_id renesas_socs[] __initconst = {
#ifdef CONFIG_ARCH_R7S72100
{ .compatible = "renesas,r7s72100", .data = &soc_rz_a1h },
#endif
#ifdef CONFIG_ARCH_R7S9210
{ .compatible = "renesas,r7s9210", .data = &soc_rz_a2m },
#endif
#ifdef CONFIG_ARCH_R8A73A4
{ .compatible = "renesas,r8a73a4", .data = &soc_rmobile_ape6 },
#endif
@ -275,7 +287,7 @@ static int __init renesas_soc_init(void)
void __iomem *chipid = NULL;
struct soc_device *soc_dev;
struct device_node *np;
unsigned int product;
unsigned int product, eshi = 0, eslo;
match = of_match_node(renesas_socs, of_root);
if (!match)
@ -284,6 +296,31 @@ static int __init renesas_soc_init(void)
soc = match->data;
family = soc->family;
np = of_find_compatible_node(NULL, NULL, "renesas,bsid");
if (np) {
chipid = of_iomap(np, 0);
of_node_put(np);
if (chipid) {
product = readl(chipid);
iounmap(chipid);
if (soc->id && ((product >> 16) & 0xff) != soc->id) {
pr_warn("SoC mismatch (product = 0x%x)\n",
product);
return -ENODEV;
}
}
/*
* TODO: Upper 4 bits of BSID are for chip version, but the
* format is not known at this time so we don't know how to
* specify eshi and eslo
*/
goto done;
}
/* Try PRR first, then hardcoded fallback */
np = of_find_compatible_node(NULL, NULL, "renesas,prr");
if (np) {
@ -302,8 +339,11 @@ static int __init renesas_soc_init(void)
pr_warn("SoC mismatch (product = 0x%x)\n", product);
return -ENODEV;
}
eshi = ((product >> 4) & 0x0f) + 1;
eslo = product & 0xf;
}
done:
soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
if (!soc_dev_attr)
return -ENOMEM;
@ -315,10 +355,9 @@ static int __init renesas_soc_init(void)
soc_dev_attr->family = kstrdup_const(family->name, GFP_KERNEL);
soc_dev_attr->soc_id = kstrdup_const(strchr(match->compatible, ',') + 1,
GFP_KERNEL);
if (chipid)
soc_dev_attr->revision = kasprintf(GFP_KERNEL, "ES%u.%u",
((product >> 4) & 0x0f) + 1,
product & 0xf);
if (eshi)
soc_dev_attr->revision = kasprintf(GFP_KERNEL, "ES%u.%u", eshi,
eslo);
pr_info("Detected Renesas %s %s %s\n", soc_dev_attr->family,
soc_dev_attr->soc_id, soc_dev_attr->revision ?: "");