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| author | Daniel Golle <daniel@makrotopia.org> | 2020-02-02 18:02:11 +0200 |
|---|---|---|
| committer | Daniel Golle <daniel@makrotopia.org> | 2020-02-07 12:54:33 +0200 |
| commit | 16031ebaf89f68ff3328e8d4a922adb244c2d5ae (patch) | |
| tree | fa794e3a8002a9044f7e5621c9f286b1bba0f94f /target/linux/ath79 | |
| parent | b439d3bfb5bf6e5cc1e2ad5b7a086eb46995eeaf (diff) | |
| download | upstream-16031ebaf89f68ff3328e8d4a922adb244c2d5ae.tar.gz upstream-16031ebaf89f68ff3328e8d4a922adb244c2d5ae.tar.bz2 upstream-16031ebaf89f68ff3328e8d4a922adb244c2d5ae.zip | |
ath79: add support for Atheros AR934x HS UART
AR934x chips also got the 'old' qca,ar9330-uart in addition to the
'new' ns16550a compatible one. Add support for UART1 clock selector as
well as device-tree bindings in ar934x.dtsi to make use of that uart.
Reported-by: Piotr Dymacz <pepe2k@gmail.com>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Diffstat (limited to 'target/linux/ath79')
| -rw-r--r-- | target/linux/ath79/dts/ar934x.dtsi | 13 | ||||
| -rw-r--r-- | target/linux/ath79/patches-4.19/0039-MIPS-ath79-export-UART1-reference-clock.patch | 52 |
2 files changed, 65 insertions, 0 deletions
diff --git a/target/linux/ath79/dts/ar934x.dtsi b/target/linux/ath79/dts/ar934x.dtsi index c17623511b..e8c21fb710 100644 --- a/target/linux/ath79/dts/ar934x.dtsi +++ b/target/linux/ath79/dts/ar934x.dtsi @@ -133,6 +133,19 @@ #reset-cells = <1>; }; + + hs_uart: uart@18500000 { + compatible = "qca,ar9330-uart"; + reg = <0x18500000 0x14>; + + interrupts = <6>; + interrupt-parent = <&miscintc>; + + clocks = <&pll ATH79_CLK_UART1>; + clock-names = "uart"; + + status = "disabled"; + }; }; nand: nand@1b000200 { diff --git a/target/linux/ath79/patches-4.19/0039-MIPS-ath79-export-UART1-reference-clock.patch b/target/linux/ath79/patches-4.19/0039-MIPS-ath79-export-UART1-reference-clock.patch new file mode 100644 index 0000000000..8656fafe0e --- /dev/null +++ b/target/linux/ath79/patches-4.19/0039-MIPS-ath79-export-UART1-reference-clock.patch @@ -0,0 +1,52 @@ +--- 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_AHB] = "ahb", + [ATH79_CLK_REF] = "ref", + [ATH79_CLK_MDIO] = "mdio", ++ [ATH79_CLK_UART1] = "uart1", + }; + + static const char * __init ath79_clk_name(int type) +@@ -346,6 +347,9 @@ static void __init ar934x_clocks_init(vo + if (clk_ctrl & AR934X_PLL_SWITCH_CLOCK_CONTROL_MDIO_CLK_SEL) + ath79_set_clk(ATH79_CLK_MDIO, 100 * 1000 * 1000); + ++ if (clk_ctrl & AR934X_PLL_SWITCH_CLOCK_CONTROL_UART1_CLK_SEL) ++ ath79_set_clk(ATH79_CLK_UART1, 100 * 1000 * 1000); ++ + iounmap(dpll_base); + } + +@@ -651,6 +655,9 @@ static void __init ath79_clocks_init_dt( + if (!clks[ATH79_CLK_MDIO]) + clks[ATH79_CLK_MDIO] = clks[ATH79_CLK_REF]; + ++ if (!clks[ATH79_CLK_UART1]) ++ clks[ATH79_CLK_UART1] = 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/arch/mips/include/asm/mach-ath79/ar71xx_regs.h ++++ b/arch/mips/include/asm/mach-ath79/ar71xx_regs.h +@@ -351,6 +351,7 @@ + #define AR934X_PLL_CPU_DDR_CLK_CTRL_AHBCLK_FROM_DDRPLL BIT(24) + + #define AR934X_PLL_SWITCH_CLOCK_CONTROL_MDIO_CLK_SEL BIT(6) ++#define AR934X_PLL_SWITCH_CLOCK_CONTROL_UART1_CLK_SEL BIT(7) + + #define QCA953X_PLL_CPU_CONFIG_REG 0x00 + #define QCA953X_PLL_DDR_CONFIG_REG 0x04 +--- a/include/dt-bindings/clock/ath79-clk.h ++++ b/include/dt-bindings/clock/ath79-clk.h +@@ -15,7 +15,8 @@ + #define ATH79_CLK_AHB 2 + #define ATH79_CLK_REF 3 + #define ATH79_CLK_MDIO 4 ++#define ATH79_CLK_UART1 5 + +-#define ATH79_CLK_END 5 ++#define ATH79_CLK_END 6 + + #endif /* __DT_BINDINGS_ATH79_CLK_H */ |