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| Path | csiph.com!goblin2!goblin.stu.neva.ru!aioe.org!bofh.it!news.nic.it!robomod |
|---|---|
| From | Andy Shevchenko <andriy.shevchenko@linux.intel.com> |
| Newsgroups | linux.kernel |
| Subject | [PATCH v6 5/5] serial: 8250_dw: allow lower reference frequencies |
| Date | Tue, 22 Sep 2015 18:00:02 +0200 |
| Message-ID | <qby94-1o7-31@gated-at.bofh.it> (permalink) |
| References | <qby93-1o7-3@gated-at.bofh.it> |
| X-Original-To | Stephen Boyd <sboyd@codeaurora.org>, linux-kernel@vger.kernel.org, heikki.krogerus@linux.intel.com, linux-clk@vger.kernel.org |
| X-Extloop1 | 1 |
| X-Ironport-Av | E=Sophos;i="5.17,573,1437462000"; d="scan'208";a="566326399" |
| X-Mailer | git-send-email 2.5.1 |
| Sender | robomod@news.nic.it |
| List-ID | <linux-kernel.vger.kernel.org> |
| X-Mailing-List | linux-kernel@vger.kernel.org |
| Approved | robomod@news.nic.it |
| Lines | 35 |
| Organization | linux.* mail to news gateway |
| X-Original-Cc | Andy Shevchenko <andriy.shevchenko@linux.intel.com> |
| X-Original-Date | Tue, 22 Sep 2015 18:54:12 +0300 |
| X-Original-Message-ID | <1442937252-50281-6-git-send-email-andriy.shevchenko@linux.intel.com> |
| X-Original-References | <1442937252-50281-1-git-send-email-andriy.shevchenko@linux.intel.com> |
| X-Original-Sender | linux-kernel-owner@vger.kernel.org |
| Xref | csiph.com linux.kernel:1230381 |
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We have couple of standard but rare used baudrates which are not supported by 1,8432MHz reference frequency. Besides that user can potentially ask for any baudrate (via BOTHER flag) and we currently don't fully support that. Since clk-fractional-divider is moved to use rational best approximation for reference frequency we may amend the driver to support whatever user wants. Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> --- drivers/tty/serial/8250/8250_dw.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c index 06324f1..df3eddf 100644 --- a/drivers/tty/serial/8250/8250_dw.c +++ b/drivers/tty/serial/8250/8250_dw.c @@ -224,10 +224,6 @@ static void dw8250_set_termios(struct uart_port *p, struct ktermios *termios, if (IS_ERR(d->clk) || !old) goto out; - /* Not requesting clock rates below 1.8432Mhz */ - if (baud < 115200) - baud = 115200; - clk_disable_unprepare(d->clk); rate = clk_round_rate(d->clk, baud * 16); ret = clk_set_rate(d->clk, rate); -- 2.5.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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[PATCH v6 0/5] clk: fractional-divider: do a clean up and update Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2015-09-22 18:00 +0200 [PATCH v6 3/5] clk: rockchip: save width in struct clk_fractional_divider Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2015-09-22 18:00 +0200 [PATCH v6 2/5] clk: fractional-divider: keep mwidth and nwidth internally Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2015-09-22 18:00 +0200 [PATCH v6 5/5] serial: 8250_dw: allow lower reference frequencies Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2015-09-22 18:00 +0200 [PATCH v6 4/5] clk: fractional-divider: switch to rational best approximation Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2015-09-22 18:00 +0200
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