From b1d57dadb2da0e010e157fd2383523578c9dcc2e Mon Sep 17 00:00:00 2001 From: Sven Eckelmann Date: Fri, 19 Jan 2018 14:02:09 +0100 Subject: ar71xx: disable 40Mhz refclk for QCA953x The "QCA9531 v2.0 802.11n 2x2 2.4 GHz Premium SOC for WLAN Platforms" datasheet (80-Y7991-1 Rev. C - October 2014) doesn't specify support for a 40 Mhz reference clock. The register description for "Bootstrap Options" (page 31) defines following states for the bit 4 (REF_CLK): * 0 - CLK25 (default) * 1 - (reserved) Devices like the TP-Link CPE210 v2 has this bit set to 1 but is using a 25 Mhz reference clock. OpenWrt is still interpreted this bit as 40 Mhz and then break the bootup of the system due to this incorrect interpretation. Signed-off-by: Sven Eckelmann [refreshed patches] Signed-off-by: Piotr Dymacz --- ...20-MIPS-ath79-add-support-for-QCA953x-SoC.patch | 27 ++++++++-------------- 1 file changed, 9 insertions(+), 18 deletions(-) (limited to 'target/linux/ar71xx/patches-4.4/620-MIPS-ath79-add-support-for-QCA953x-SoC.patch') diff --git a/target/linux/ar71xx/patches-4.4/620-MIPS-ath79-add-support-for-QCA953x-SoC.patch b/target/linux/ar71xx/patches-4.4/620-MIPS-ath79-add-support-for-QCA953x-SoC.patch index 5cfb4e78d7..fcaff77619 100644 --- a/target/linux/ar71xx/patches-4.4/620-MIPS-ath79-add-support-for-QCA953x-SoC.patch +++ b/target/linux/ar71xx/patches-4.4/620-MIPS-ath79-add-support-for-QCA953x-SoC.patch @@ -44,7 +44,7 @@ meaning of the bits CPUCLK_FROM_CPUPLL and DDRCLK_FROM_DDRPLL is reversed. config ATH79_NVRAM --- a/arch/mips/ath79/clock.c +++ b/arch/mips/ath79/clock.c -@@ -354,6 +354,91 @@ static void __init ar934x_clocks_init(vo +@@ -354,6 +354,87 @@ static void __init ar934x_clocks_init(vo iounmap(dpll_base); } @@ -56,13 +56,9 @@ meaning of the bits CPUCLK_FROM_CPUPLL and DDRCLK_FROM_DDRPLL is reversed. + unsigned long ahb_rate; + u32 pll, out_div, ref_div, nint, frac, clk_ctrl, postdiv; + u32 cpu_pll, ddr_pll; -+ u32 bootstrap; + -+ bootstrap = ath79_reset_rr(QCA953X_RESET_REG_BOOTSTRAP); -+ if (bootstrap & QCA953X_BOOTSTRAP_REF_CLK_40) -+ ref_rate = 40 * 1000 * 1000; -+ else -+ ref_rate = 25 * 1000 * 1000; ++ /* QCA953X only supports 25MHz ref_clk */ ++ ref_rate = 25 * 1000 * 1000; + + pll = ath79_pll_rr(QCA953X_PLL_CPU_CONFIG_REG); + out_div = (pll >> QCA953X_PLL_CPU_CONFIG_OUTDIV_SHIFT) & @@ -136,7 +132,7 @@ meaning of the bits CPUCLK_FROM_CPUPLL and DDRCLK_FROM_DDRPLL is reversed. static void __init qca955x_clocks_init(void) { unsigned long ref_rate; -@@ -451,6 +536,8 @@ void __init ath79_clocks_init(void) +@@ -451,6 +532,8 @@ void __init ath79_clocks_init(void) ar933x_clocks_init(); else if (soc_is_ar934x()) ar934x_clocks_init(); @@ -247,14 +243,12 @@ meaning of the bits CPUCLK_FROM_CPUPLL and DDRCLK_FROM_DDRPLL is reversed. ath79_wmac_data.external_reset = ar933x_wmac_reset; } -@@ -150,6 +150,26 @@ static void ar934x_wmac_setup(void) +@@ -150,6 +150,21 @@ static void ar934x_wmac_setup(void) ath79_wmac_data.get_mac_revision = ar93xx_get_soc_revision; } +static void qca953x_wmac_setup(void) +{ -+ u32 t; -+ + ath79_wmac_device.name = "qca953x_wmac"; + + ath79_wmac_resources[0].start = QCA953X_WMAC_BASE; @@ -262,11 +256,8 @@ meaning of the bits CPUCLK_FROM_CPUPLL and DDRCLK_FROM_DDRPLL is reversed. + ath79_wmac_resources[1].start = ATH79_IP2_IRQ(1); + ath79_wmac_resources[1].end = ATH79_IP2_IRQ(1); + -+ t = ath79_reset_rr(QCA953X_RESET_REG_BOOTSTRAP); -+ if (t & QCA953X_BOOTSTRAP_REF_CLK_40) -+ ath79_wmac_data.is_clk_25mhz = false; -+ else -+ ath79_wmac_data.is_clk_25mhz = true; ++ /* QCA953X only supports 25MHz ref_clk */ ++ ath79_wmac_data.is_clk_25mhz = true; + + ath79_wmac_data.get_mac_revision = ar93xx_get_soc_revision; +} @@ -274,7 +265,7 @@ meaning of the bits CPUCLK_FROM_CPUPLL and DDRCLK_FROM_DDRPLL is reversed. static void qca955x_wmac_setup(void) { u32 t; -@@ -379,6 +399,8 @@ void __init ath79_register_wmac(u8 *cal_ +@@ -379,6 +394,8 @@ void __init ath79_register_wmac(u8 *cal_ ar933x_wmac_setup(); else if (soc_is_ar934x()) ar934x_wmac_setup(); @@ -550,7 +541,7 @@ meaning of the bits CPUCLK_FROM_CPUPLL and DDRCLK_FROM_DDRPLL is reversed. +#define QCA953X_BOOTSTRAP_SW_OPTION2 BIT(12) +#define QCA953X_BOOTSTRAP_SW_OPTION1 BIT(11) +#define QCA953X_BOOTSTRAP_EJTAG_MODE BIT(5) -+#define QCA953X_BOOTSTRAP_REF_CLK_40 BIT(4) ++#define QCA953X_BOOTSTRAP_REF_CLK BIT(4) +#define QCA953X_BOOTSTRAP_SDRAM_DISABLED BIT(1) +#define QCA953X_BOOTSTRAP_DDR1 BIT(0) + -- cgit v1.2.3