From: Vignesh R <vigneshr@ti.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH 0/4] dra7xx: QSPI: Increase SPI bus speed.
Date: Mon, 25 Jul 2016 15:45:43 +0530 [thread overview]
Message-ID: <20160725101547.18503-1-vigneshr@ti.com> (raw)
By configuring DPLL_PER_HS13 divider value to provide 76.8MHz clock as
QSPI fclk on dra7xx, it is possible to operate SPI slave clock at
768.MHz which is the maximum supported frequency as per AM572x DM
SPRS953A. This helps to increase flash read speed by ~2MB/s.
Tested on DRA74 Rev G & H, DRA72 Rev B & C EVMs.
Lokesh Vutla (1):
ARM: dra7xx: Change DPLL_PER_HS13 divider value
Vignesh R (3):
spi: ti_qspi: dra7xx: Add support to use 76.8MHz clock
configs: dra7xx: Update QSPI speed to 76.8MHz
ARM: dts: dra7xx: Update spi-max-frequency for QSPI
arch/arm/cpu/armv7/omap5/hw_data.c | 2 +-
arch/arm/dts/dra7-evm.dts | 2 +-
arch/arm/dts/dra72-evm.dts | 2 +-
drivers/spi/ti_qspi.c | 17 ++++++++++++-----
include/configs/dra7xx_evm.h | 2 +-
5 files changed, 16 insertions(+), 9 deletions(-)
--
2.9.2
next reply other threads:[~2016-07-25 10:15 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-25 10:15 Vignesh R [this message]
2016-07-25 10:15 ` [U-Boot] [PATCH 1/4] ARM: dra7xx: Change DPLL_PER_HS13 divider value Vignesh R
2016-07-25 13:38 ` Tom Rini
2016-07-29 8:42 ` Mugunthan V N
2016-07-29 18:18 ` Jagan Teki
2016-07-25 10:15 ` [U-Boot] [PATCH 2/4] spi: ti_qspi: dra7xx: Add support to use 76.8MHz clock Vignesh R
2016-07-25 13:38 ` Tom Rini
2016-07-27 6:35 ` Jagan Teki
2016-07-27 12:10 ` Vignesh R
2016-07-28 13:36 ` Jagan Teki
2016-07-29 8:42 ` Mugunthan V N
2016-07-25 10:15 ` [U-Boot] [PATCH 3/4] configs: dra7xx: Update QSPI speed to 76.8MHz Vignesh R
2016-07-25 13:38 ` Tom Rini
2016-07-27 6:36 ` Jagan Teki
2016-07-29 8:44 ` Mugunthan V N
2016-07-25 10:15 ` [U-Boot] [PATCH 4/4] ARM: dts: dra7xx: Update spi-max-frequency for QSPI Vignesh R
2016-07-25 13:38 ` Tom Rini
2016-07-25 13:46 ` Vignesh R
2016-07-28 13:39 ` Jagan Teki
2016-07-29 8:45 ` Mugunthan V N
2016-07-25 13:38 ` [U-Boot] [PATCH 0/4] dra7xx: QSPI: Increase SPI bus speed Tom Rini
2016-07-26 6:34 ` Vignesh R
2016-07-29 18:23 ` Jagan Teki
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