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authorFelix Fietkau <nbd@nbd.name>2019-01-11 15:22:35 +0100
committerPaul Burton <paul.burton@mips.com>2019-01-22 20:17:22 +0100
commit6810ed320ec621b37c395be67125f1f456f1e55a (patch)
treeea20015bf8fb2918923cc7dcef4c7465d2ce23d2 /arch/mips/ath79
parentMIPS: ath79: support setting up clock via DT on all SoC types (diff)
downloadlinux-6810ed320ec621b37c395be67125f1f456f1e55a.tar.xz
linux-6810ed320ec621b37c395be67125f1f456f1e55a.zip
MIPS: ath79: export switch MDIO reference clock
On AR934x, the MDIO reference clock can be configured to a fixed 100 MHz clock. If that feature is not used, it defaults to the main reference clock, like on all other SoC. Signed-off-by: Felix Fietkau <nbd@nbd.name> Signed-off-by: John Crispin <john@phrozen.org> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Paul Burton <paul.burton@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: James Hogan <jhogan@kernel.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: Pengutronix Kernel Team <kernel@pengutronix.de> Cc: linux-mips@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: devicetree@vger.kernel.org
Diffstat (limited to 'arch/mips/ath79')
-rw-r--r--arch/mips/ath79/clock.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/mips/ath79/clock.c b/arch/mips/ath79/clock.c
index c234818b30e1..699f00f096cb 100644
--- a/arch/mips/ath79/clock.c
+++ b/arch/mips/ath79/clock.c
@@ -42,6 +42,7 @@ static const char * const clk_names[ATH79_CLK_END] = {
[ATH79_CLK_DDR] = "ddr",
[ATH79_CLK_AHB] = "ahb",
[ATH79_CLK_REF] = "ref",
+ [ATH79_CLK_MDIO] = "mdio",
};
static const char * __init ath79_clk_name(int type)
@@ -342,6 +343,10 @@ static void __init ar934x_clocks_init(void __iomem *pll_base)
ath79_set_clk(ATH79_CLK_DDR, ddr_rate);
ath79_set_clk(ATH79_CLK_AHB, ahb_rate);
+ clk_ctrl = __raw_readl(pll_base + AR934X_PLL_SWITCH_CLOCK_CONTROL_REG);
+ if (clk_ctrl & AR934X_PLL_SWITCH_CLOCK_CONTROL_MDIO_CLK_SEL)
+ ath79_set_clk(ATH79_CLK_MDIO, 100 * 1000 * 1000);
+
iounmap(dpll_base);
}
@@ -698,6 +703,9 @@ static void __init ath79_clocks_init_dt(struct device_node *np)
else if (of_device_is_compatible(np, "qca,qca9560-pll"))
qca956x_clocks_init(pll_base);
+ if (!clks[ATH79_CLK_MDIO])
+ clks[ATH79_CLK_MDIO] = clks[ATH79_CLK_REF];
+
if (of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data)) {
pr_err("%pOF: could not register clk provider\n", np);
goto err_iounmap;