@@ -252,11 +252,20 @@ static u32 cpg_mode __initdata;
static u32 cpg_quirks __initdata;
#define PLL_ERRATA BIT(0) /* Missing PLL0/2/4 post-divider */
+#define RCKCR_CKSEL BIT(1) /* Manual RCLK parent selection */
static const struct soc_device_attribute cpg_quirks_match[] __initconst = {
{
.soc_id = "r8a7795", .revision = "ES1.0",
- .data = (void *)PLL_ERRATA,
+ .data = (void *)(PLL_ERRATA | RCKCR_CKSEL),
+ },
+ {
+ .soc_id = "r8a7795", .revision = "ES1.*",
+ .data = (void *)RCKCR_CKSEL,
+ },
+ {
+ .soc_id = "r8a7796", .revision = "ES1.0",
+ .data = (void *)RCKCR_CKSEL,
},
{ /* sentinel */ }
};
@@ -330,18 +339,25 @@ struct clk * __init rcar_gen3_cpg_clk_register(struct device *dev,
return cpg_sd_clk_register(core, base, __clk_get_name(parent));
case CLK_TYPE_GEN3_R:
- /*
- * RINT is default.
- * Only if EXTALR is populated, we switch to it.
- */
- value = readl(base + CPG_RCKCR) & 0x3f;
-
- if (clk_get_rate(clks[cpg_clk_extalr])) {
- parent = clks[cpg_clk_extalr];
- value |= BIT(15);
+ if (cpg_quirks & RCKCR_CKSEL) {
+ /*
+ * RINT is default.
+ * Only if EXTALR is populated, we switch to it.
+ */
+ value = readl(base + CPG_RCKCR) & 0x3f;
+
+ if (clk_get_rate(clks[cpg_clk_extalr])) {
+ parent = clks[cpg_clk_extalr];
+ value |= BIT(15);
+ }
+
+ writel(value, base + CPG_RCKCR);
+ break;
}
- writel(value, base + CPG_RCKCR);
+ /* Select parent clock of RCLK by MD28 */
+ if (cpg_mode & BIT(28))
+ parent = clks[cpg_clk_extalr];
break;
default:
Starting with R-Car H3 ES2.0, the parent of RCLK is selected using MD28. Add support for that, but retain the old behavior for R-Car H3 ES1.x and M3-W ES1.0 using a quirk. Inspired by a patch by Takeshi Kihara in the BSP. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Cc: Takeshi Kihara <takeshi.kihara.df@renesas.com> --- v2: - New. --- drivers/clk/renesas/rcar-gen3-cpg.c | 38 ++++++++++++++++++++++++++----------- 1 file changed, 27 insertions(+), 11 deletions(-)