diff options
Diffstat (limited to 'target/linux/ath79/patches-4.19/0026-MIPS-ath79-export-switch-MDIO-reference-clock.patch')
| -rw-r--r-- | target/linux/ath79/patches-4.19/0026-MIPS-ath79-export-switch-MDIO-reference-clock.patch | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/target/linux/ath79/patches-4.19/0026-MIPS-ath79-export-switch-MDIO-reference-clock.patch b/target/linux/ath79/patches-4.19/0026-MIPS-ath79-export-switch-MDIO-reference-clock.patch new file mode 100644 index 0000000000..27adb56f56 --- /dev/null +++ b/target/linux/ath79/patches-4.19/0026-MIPS-ath79-export-switch-MDIO-reference-clock.patch @@ -0,0 +1,59 @@ +From 78538d673801902108797f2c813e70cfbce280c9 Mon Sep 17 00:00:00 2001 +From: Felix Fietkau <nbd@nbd.name> +Date: Tue, 6 Mar 2018 13:27:28 +0100 +Subject: [PATCH 26/33] 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> +--- + arch/mips/ath79/clock.c | 8 ++++++++ + include/dt-bindings/clock/ath79-clk.h | 3 ++- + 2 files changed, 10 insertions(+), 1 deletion(-) + +--- a/arch/mips/ath79/clock.c ++++ b/arch/mips/ath79/clock.c +@@ -42,6 +42,7 @@ static const char * const clk_names[ATH7 + [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(vo + 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( + 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; +--- a/include/dt-bindings/clock/ath79-clk.h ++++ b/include/dt-bindings/clock/ath79-clk.h +@@ -14,7 +14,8 @@ + #define ATH79_CLK_DDR 1 + #define ATH79_CLK_AHB 2 + #define ATH79_CLK_REF 3 ++#define ATH79_CLK_MDIO 4 + +-#define ATH79_CLK_END 4 ++#define ATH79_CLK_END 5 + + #endif /* __DT_BINDINGS_ATH79_CLK_H */ |