diff options
| author | Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> | 2018-05-15 15:07:39 +0300 |
|---|---|---|
| committer | Simon Horman <horms+renesas@verge.net.au> | 2018-05-16 11:57:44 +0300 |
| commit | 086b399965a7ee7e50c3b3c57f2dba30ff0334b0 (patch) | |
| tree | 29a2376aa7de30d56d478c7f7a8aa796db6b32d3 /drivers/soc | |
| parent | 44b12d4311d7e296d178cbad019d0537de4f8890 (diff) | |
| download | linux-086b399965a7ee7e50c3b3c57f2dba30ff0334b0.tar.xz | |
soc: renesas: r8a77990-sysc: Add workaround for 3DG-{A,B}
This patch adds workaround for 3DG-{A,B} of R-Car E3 ES1.0 because
the SoC has a restriction about the order.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Diffstat (limited to 'drivers/soc')
| -rw-r--r-- | drivers/soc/renesas/r8a77990-sysc.c | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/drivers/soc/renesas/r8a77990-sysc.c b/drivers/soc/renesas/r8a77990-sysc.c index a8c6417fcd2b..15579ebc5ed2 100644 --- a/drivers/soc/renesas/r8a77990-sysc.c +++ b/drivers/soc/renesas/r8a77990-sysc.c @@ -7,12 +7,13 @@ #include <linux/bug.h> #include <linux/kernel.h> +#include <linux/sys_soc.h> #include <dt-bindings/power/r8a77990-sysc.h> #include "rcar-sysc.h" -static const struct rcar_sysc_area r8a77990_areas[] __initconst = { +static struct rcar_sysc_area r8a77990_areas[] __initdata = { { "always-on", 0, 0, R8A77990_PD_ALWAYS_ON, -1, PD_ALWAYS_ON }, { "ca53-scu", 0x140, 0, R8A77990_PD_CA53_SCU, R8A77990_PD_ALWAYS_ON, PD_SCU }, @@ -27,7 +28,41 @@ static const struct rcar_sysc_area r8a77990_areas[] __initconst = { { "3dg-b", 0x100, 1, R8A77990_PD_3DG_B, R8A77990_PD_3DG_A }, }; +static void __init rcar_sysc_fix_parent(struct rcar_sysc_area *areas, + unsigned int num_areas, u8 id, + int new_parent) +{ + unsigned int i; + + for (i = 0; i < num_areas; i++) + if (areas[i].isr_bit == id) { + areas[i].parent = new_parent; + return; + } +} + +/* Fixups for R-Car E3 ES1.0 revision */ +static const struct soc_device_attribute r8a77990[] __initconst = { + { .soc_id = "r8a77990", .revision = "ES1.0" }, + { /* sentinel */ } +}; + +static int __init r8a77990_sysc_init(void) +{ + if (soc_device_match(r8a77990)) { + rcar_sysc_fix_parent(r8a77990_areas, + ARRAY_SIZE(r8a77990_areas), + R8A77990_PD_3DG_A, R8A77990_PD_3DG_B); + rcar_sysc_fix_parent(r8a77990_areas, + ARRAY_SIZE(r8a77990_areas), + R8A77990_PD_3DG_B, R8A77990_PD_ALWAYS_ON); + } + + return 0; +} + const struct rcar_sysc_info r8a77990_sysc_info __initconst = { + .init = r8a77990_sysc_init, .areas = r8a77990_areas, .num_areas = ARRAY_SIZE(r8a77990_areas), }; |