From: Anatolij Gustschin <agust@denx.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH 6/8] video: ssd2828: Allow using 'pclk' as the PLL clock source
Date: Sat, 10 Jan 2015 01:33:22 +0100 [thread overview]
Message-ID: <20150110013322.12298a9d@crub> (raw)
In-Reply-To: <1420797676-22515-7-git-send-email-siarhei.siamashka@gmail.com>
On Fri, 9 Jan 2015 12:01:14 +0200
Siarhei Siamashka <siarhei.siamashka@gmail.com> wrote:
> Instead of using the internal 'tx_clk' clock source, it is also
> possible to use the pixel clock signal from the parallel LCD
> interface ('pclk') as the reference clock for PLL.
>
> The 'tx_clk' clock speed may be different on different boards/devices
> (the allowed range is 8MHz - 30MHz). Which is not very convenient,
> especially considering the need to know the exact 'tx_clk' clock
> speed. Which may be difficult to identify without having device
> schematics and/or accurate documentation/sources every time.
>
> Using 'pclk' is free from all these problems.
>
> Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Acked-by: Anatolij Gustschin <agust@denx.de>
next prev parent reply other threads:[~2015-01-10 0:33 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-09 10:01 [U-Boot] [PATCH 0/8] video: Add support for SSD2828 (parallel LCD to MIPI bridge) Siarhei Siamashka
2015-01-09 10:01 ` [U-Boot] [PATCH 1/8] sunxi: axp221: Add ELDO[1-3] support Siarhei Siamashka
2015-01-09 17:05 ` Anatolij Gustschin
2015-01-11 12:05 ` Siarhei Siamashka
2015-01-11 13:43 ` Hans de Goede
2015-01-09 10:01 ` [U-Boot] [PATCH 2/8] include: Add header file with MIPI DSI constants from the Linux kernel Siarhei Siamashka
2015-01-09 17:15 ` Anatolij Gustschin
2015-01-11 12:05 ` Siarhei Siamashka
2015-01-09 10:01 ` [U-Boot] [PATCH 3/8] video: Add support for SSD2828 (parallel LCD to MIPI bridge) Siarhei Siamashka
2015-01-10 0:01 ` Anatolij Gustschin
2015-01-09 10:01 ` [U-Boot] [PATCH 4/8] video: sunxi: Hook up SSD2828 with the sunxi video driver Siarhei Siamashka
2015-01-10 0:21 ` Anatolij Gustschin
2015-01-09 10:01 ` [U-Boot] [PATCH 5/8] sun6i: Add LCD display support for MSI Primo81 tablet Siarhei Siamashka
2015-01-10 0:24 ` Anatolij Gustschin
2015-01-09 10:01 ` [U-Boot] [PATCH 6/8] video: ssd2828: Allow using 'pclk' as the PLL clock source Siarhei Siamashka
2015-01-10 0:33 ` Anatolij Gustschin [this message]
2015-01-09 10:01 ` [U-Boot] [PATCH 7/8] video: sunxi: Switch from 'tx_clk' to 'pclk' for SSD2828 Siarhei Siamashka
2015-01-10 0:39 ` Anatolij Gustschin
2015-01-09 10:01 ` [U-Boot] [PATCH 8/8] video: ssd2828: Use MIPI DCS commands to retrieve the LCD panel id Siarhei Siamashka
2015-01-09 10:28 ` [U-Boot] [PATCH 0/8] video: Add support for SSD2828 (parallel LCD to MIPI bridge) Siarhei Siamashka
2015-01-09 15:35 ` Hans de Goede
2015-01-10 9:17 ` Hans de Goede
2015-01-10 10:52 ` Ian Campbell
2015-01-11 12:09 ` Siarhei Siamashka
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