diff options
Diffstat (limited to 'package/boot/arm-trusted-firmware-mvebu/patches/100-fix-plat-marvell-a3720-uart-fix-UART-clock-rate-valu.patch')
| -rw-r--r-- | package/boot/arm-trusted-firmware-mvebu/patches/100-fix-plat-marvell-a3720-uart-fix-UART-clock-rate-valu.patch | 60 |
1 files changed, 0 insertions, 60 deletions
diff --git a/package/boot/arm-trusted-firmware-mvebu/patches/100-fix-plat-marvell-a3720-uart-fix-UART-clock-rate-valu.patch b/package/boot/arm-trusted-firmware-mvebu/patches/100-fix-plat-marvell-a3720-uart-fix-UART-clock-rate-valu.patch deleted file mode 100644 index 6f887411b4..0000000000 --- a/package/boot/arm-trusted-firmware-mvebu/patches/100-fix-plat-marvell-a3720-uart-fix-UART-clock-rate-valu.patch +++ /dev/null @@ -1,60 +0,0 @@ -From 66a7752834382595d26214783ae4698fd1f00bd6 Mon Sep 17 00:00:00 2001 -From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> -Date: Thu, 13 May 2021 14:53:44 +0200 -Subject: [PATCH] fix(plat/marvell/a3720/uart): fix UART clock rate value and - divisor calculation -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -UART parent clock is by default the platform's xtal clock, which is -25 MHz. - -The value defined in the driver, though, is 25.8048 MHz. This is a hack -for the suboptimal divisor calculation - Divisor = UART clock / (16 * baudrate) -which does not use rounding division, resulting in a suboptimal value -for divisor if the correct parent clock rate was used. - -Change the code for divisor calculation to - Divisor = Round(UART clock / (16 * baudrate)) -and change the parent clock rate value to 25 MHz. - -The final UART divisor for default baudrate 115200 is not affected by -this change. - -(Note that the parent clock rate should not be defined via a macro, -since the xtal clock can also be 40 MHz. This is outside of the scope of -this fix, though.) - -Signed-off-by: Pali Rohár <pali@kernel.org> -Change-Id: Iaa401173df87aec94f2dd1b38a90fb6ed0bf0ec6 ---- - drivers/marvell/uart/a3700_console.S | 3 ++- - plat/marvell/armada/a3k/common/include/platform_def.h | 2 +- - 2 files changed, 3 insertions(+), 2 deletions(-) - ---- a/drivers/marvell/uart/a3700_console.S -+++ b/drivers/marvell/uart/a3700_console.S -@@ -45,8 +45,9 @@ func console_a3700_core_init - cbz w2, init_fail - - /* Program the baudrate */ -- /* Divisor = Uart clock / (16 * baudrate) */ -+ /* Divisor = Round(Uartclock / (16 * baudrate)) */ - lsl w2, w2, #4 -+ add w1, w1, w2, lsr #1 - udiv w2, w1, w2 - and w2, w2, #0x3ff - ---- a/plat/marvell/armada/a3k/common/include/platform_def.h -+++ b/plat/marvell/armada/a3k/common/include/platform_def.h -@@ -164,7 +164,7 @@ - * PL011 related constants - */ - #define PLAT_MARVELL_BOOT_UART_BASE (MVEBU_REGS_BASE + 0x12000) --#define PLAT_MARVELL_BOOT_UART_CLK_IN_HZ 25804800 -+#define PLAT_MARVELL_BOOT_UART_CLK_IN_HZ 25000000 - - #define PLAT_MARVELL_CRASH_UART_BASE PLAT_MARVELL_BOOT_UART_BASE - #define PLAT_MARVELL_CRASH_UART_CLK_IN_HZ PLAT_MARVELL_BOOT_UART_CLK_IN_HZ |