linux-kernel - Re: [RESEND][PATCH/RFC] OMAP2: serial.c: Fix number of uarts in early

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Message-ID: <20100225184355.GF28173@atomide.com>
Date:	Thu, 25 Feb 2010 10:43:55 -0800
From:	Tony Lindgren <tony@...mide.com>
To:	Thomas Weber <swirl@....li>, Sergio Aquirre <saaguirre@...com>
Cc:	linux-omap@...r.kernel.org, Russell King <linux@....linux.org.uk>,
	Kevin Hilman <khilman@...prootsystems.com>,
	Santosh Shilimkar <santosh.shilimkar@...com>,
	Vikram Pandita <vikram.pandita@...com>,
	Syed Rafiuddin <rafiuddin.syed@...com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Thomas Weber <weber@...science.de>
Subject: Re: [RESEND][PATCH/RFC] OMAP2: serial.c: Fix number of uarts in
 early_init

* Thomas Weber <swirl@....li> [100225 01:36]:
> 
> The omap_serial_early_init prints the following errors:
> 
> Could not get uart4_ick
> Could not get uart4_fck
> 
> because all the uarts available in omap_uart[] will be initialized.
> Only omap4430 and omap3630 have 4 uarts at the moment.
> This patch reduces the number of uarts when cpu is not omap4430 or
> omap3630.

..and I only patched omap_serial_init and forgot about
the omap_serial_early_init..

Looks good to me, Sergio, care to test and Ack this? Also, sounds
like we still need to patch omap4 for uart4 for the clocks.

Regards,

Tony
 
> Signed-off-by: Thomas Weber <weber@...science.de>
> ---
>  arch/arm/mach-omap2/serial.c |   15 ++++++++++-----
>  1 files changed, 10 insertions(+), 5 deletions(-)
> 
> diff --git a/arch/arm/mach-omap2/serial.c b/arch/arm/mach-omap2/serial.c
> index b79bc89..da77930 100644
> --- a/arch/arm/mach-omap2/serial.c
> +++ b/arch/arm/mach-omap2/serial.c
> @@ -644,16 +644,21 @@ static void serial_out_override(struct uart_port *up, int offset, int value)
>  }
>  void __init omap_serial_early_init(void)
>  {
> -	int i;
> +	int i, nr_ports;
>  	char name[16];
>  
> +	if (!(cpu_is_omap3630() || cpu_is_omap4430()))
> +		nr_ports = 3;
> +	else
> +		nr_ports = ARRAY_SIZE(omap_uart);
> +
>  	/*
>  	 * Make sure the serial ports are muxed on at this point.
>  	 * You have to mux them off in device drivers later on
>  	 * if not needed.
>  	 */
>  
> -	for (i = 0; i < ARRAY_SIZE(omap_uart); i++) {
> +	for (i = 0; i < nr_ports; i++) {
>  		struct omap_uart_state *uart = &omap_uart[i];
>  		struct platform_device *pdev = &uart->pdev;
>  		struct device *dev = &pdev->dev;
> @@ -669,17 +674,17 @@ void __init omap_serial_early_init(void)
>  			continue;
>  		}
>  
> -		sprintf(name, "uart%d_ick", i+1);
> +		sprintf(name, "uart%d_ick", i + 1);
>  		uart->ick = clk_get(NULL, name);
>  		if (IS_ERR(uart->ick)) {
> -			printk(KERN_ERR "Could not get uart%d_ick\n", i+1);
> +			printk(KERN_ERR "Could not get uart%d_ick\n", i + 1);
>  			uart->ick = NULL;
>  		}
>  
>  		sprintf(name, "uart%d_fck", i+1);
>  		uart->fck = clk_get(NULL, name);
>  		if (IS_ERR(uart->fck)) {
> -			printk(KERN_ERR "Could not get uart%d_fck\n", i+1);
> +			printk(KERN_ERR "Could not get uart%d_fck\n", i + 1);
>  			uart->fck = NULL;
>  		}
>  
> -- 
> 1.6.4.4
> 
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