From: Anatolij Gustschin <agust@denx.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH v3 4/6] am335x-fb: setup display PLL
Date: Wed, 10 Jan 2018 14:07:46 +0100 [thread overview]
Message-ID: <20180110140746.36214744@crub> (raw)
In-Reply-To: <1515520896-18833-5-git-send-email-oe5hpm@oevsv.at>
On Tue, 9 Jan 2018 19:01:34 +0100
Hannes Schmelzer oe5hpm at oevsv.at wrote:
> The LCDC IP-core an be feed from several clock sources, one of those is
> a dedicated DPLL for generating a dividable base-clock for this IP-core.
>
> The TRM specifies the maximum input frequency for the LCCD with 200 MHz,
> so we must not exceed this value with the PLL frequency (which can lock
> much higher).
>
> This patch tries every combination of multipliers and divisors of the
> PLL and the IP-core itself for getting as near as possible the the
> requested panel->pxl_clk.
>
> Signed-off-by: Hannes Schmelzer <oe5hpm@oevsv.at>
Reviewed-by: Anatolij Gustschin <agust@denx.de>
next prev parent reply other threads:[~2018-01-10 13:07 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-09 18:01 [U-Boot] [PATCH v3 0/6] am335x-fb: support display PLL for lcd-clock / pixel-clock Hannes Schmelzer
2018-01-09 18:01 ` [U-Boot] [PATCH v3 1/6] mach-omap2: add AM335x Display PLL register definition Hannes Schmelzer
2018-01-10 13:04 ` Anatolij Gustschin
2018-01-09 18:01 ` [U-Boot] [PATCH v3 2/6] am335x-fb: cosmetic: update-copyright Hannes Schmelzer
2018-01-10 13:05 ` Anatolij Gustschin
2018-01-09 18:01 ` [U-Boot] [PATCH v3 3/6] am335x-fb: cosmetic: fix coding style Hannes Schmelzer
2018-01-10 13:05 ` Anatolij Gustschin
2018-01-09 18:01 ` [U-Boot] [PATCH v3 4/6] am335x-fb: setup display PLL Hannes Schmelzer
2018-01-10 13:07 ` Anatolij Gustschin [this message]
2018-01-09 18:01 ` [U-Boot] [PATCH v3 5/6] board/BuR: provide real clock-frequency instead a divider Hannes Schmelzer
2018-01-10 13:08 ` Anatolij Gustschin
2018-01-09 18:01 ` [U-Boot] [PATCH v3 6/6] board/BuR: drop LCDC clock manipulation from board code Hannes Schmelzer
2018-01-10 13:09 ` Anatolij Gustschin
2018-01-11 14:37 ` [U-Boot] [PATCH v3 0/6] am335x-fb: support display PLL for lcd-clock / pixel-clock Anatolij Gustschin
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