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From: Sascha Hauer <s.hauer@pengutronix.de>
To: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: barebox@lists.infradead.org
Subject: Re: [PATCH 7/8] i.MX: serial: Distil common clock ungating code
Date: Mon, 4 May 2015 09:01:19 +0200	[thread overview]
Message-ID: <20150504070119.GJ6325@pengutronix.de> (raw)
In-Reply-To: <1430619980-26243-8-git-send-email-andrew.smirnov@gmail.com>

On Sat, May 02, 2015 at 07:26:19PM -0700, Andrey Smirnov wrote:
> Move all of the common clock ungating code in early UART
> initialization into a dedicated subroutine that can be shared by all
> of the users.
> 
> Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
> ---
>  arch/arm/boards/freescale-mx6sx-sabresdb/lowlevel.c |  9 +--------
>  arch/arm/boards/karo-tx6x/lowlevel.c                | 10 +---------
>  arch/arm/boards/phytec-phycard-imx6/lowlevel.c      | 10 +---------
>  arch/arm/boards/phytec-phyflex-imx6/lowlevel.c      | 10 +---------
>  arch/arm/boards/variscite-mx6/lowlevel.c            | 10 +---------
>  arch/arm/mach-imx/include/mach/debug_ll.h           | 17 +++++++++++++++++
>  6 files changed, 22 insertions(+), 44 deletions(-)
> 
> diff --git a/arch/arm/boards/freescale-mx6sx-sabresdb/lowlevel.c b/arch/arm/boards/freescale-mx6sx-sabresdb/lowlevel.c
> index a8d16cb..fd154df 100644
> --- a/arch/arm/boards/freescale-mx6sx-sabresdb/lowlevel.c
> +++ b/arch/arm/boards/freescale-mx6sx-sabresdb/lowlevel.c
> @@ -21,16 +21,9 @@
> 
>  static inline void setup_uart(void)
>  {
> -	void __iomem *ccmbase = (void *)MX6_CCM_BASE_ADDR;
>  	void __iomem *iomuxbase = (void *)MX6_IOMUXC_BASE_ADDR;
> 
> -	writel(0xffffffff, ccmbase + 0x68);
> -	writel(0xffffffff, ccmbase + 0x6c);
> -	writel(0xffffffff, ccmbase + 0x70);
> -	writel(0xffffffff, ccmbase + 0x74);
> -	writel(0xffffffff, ccmbase + 0x78);
> -	writel(0xffffffff, ccmbase + 0x7c);
> -	writel(0xffffffff, ccmbase + 0x80);
> +	ungate_all_peripherals();
> 
>  	writel(0x0, iomuxbase + 0x24);
>  	writel(0x1b0b1, iomuxbase + 0x036C);
> diff --git a/arch/arm/boards/karo-tx6x/lowlevel.c b/arch/arm/boards/karo-tx6x/lowlevel.c
> index 3f9fb23..d7087f5 100644
> --- a/arch/arm/boards/karo-tx6x/lowlevel.c
> +++ b/arch/arm/boards/karo-tx6x/lowlevel.c
> @@ -22,7 +22,6 @@
> 
>  static inline void setup_uart(void)
>  {
> -	void __iomem *ccmbase = (void *)MX6_CCM_BASE_ADDR;
>  	void __iomem *iomuxbase = (void *)MX6_IOMUXC_BASE_ADDR;
> 
>  	writel(0x1, iomuxbase + 0x0314);
> @@ -30,14 +29,7 @@ static inline void setup_uart(void)
>  	writel(0x1, iomuxbase + 0x0330);
>  	writel(0x1, iomuxbase + 0x032c);
> 
> -	writel(0xffffffff, ccmbase + 0x68);
> -	writel(0xffffffff, ccmbase + 0x6c);
> -	writel(0xffffffff, ccmbase + 0x70);
> -	writel(0xffffffff, ccmbase + 0x74);
> -	writel(0xffffffff, ccmbase + 0x78);
> -	writel(0xffffffff, ccmbase + 0x7c);
> -	writel(0xffffffff, ccmbase + 0x80);
> -
> +	ungate_all_peripherals();
>  	setup_uart_ll();
> 
>  	putc_ll('>');
> diff --git a/arch/arm/boards/phytec-phycard-imx6/lowlevel.c b/arch/arm/boards/phytec-phycard-imx6/lowlevel.c
> index 1d48818..c8306ec 100644
> --- a/arch/arm/boards/phytec-phycard-imx6/lowlevel.c
> +++ b/arch/arm/boards/phytec-phycard-imx6/lowlevel.c
> @@ -26,19 +26,11 @@
> 
>  static inline void setup_uart(void)
>  {
> -	void __iomem *ccmbase = IOMEM(MX6_CCM_BASE_ADDR);
>  	void __iomem *iomuxbase = IOMEM(MX6_IOMUXC_BASE_ADDR);
> 
>  	writel(0x4, iomuxbase + 0x01f8);
> 
> -	writel(0xffffffff, ccmbase + 0x68);
> -	writel(0xffffffff, ccmbase + 0x6c);
> -	writel(0xffffffff, ccmbase + 0x70);
> -	writel(0xffffffff, ccmbase + 0x74);
> -	writel(0xffffffff, ccmbase + 0x78);
> -	writel(0xffffffff, ccmbase + 0x7c);
> -	writel(0xffffffff, ccmbase + 0x80);
> -
> +	ungate_all_peripherals();
>  	setup_uart_ll();
> 
>  	putc_ll('>');
> diff --git a/arch/arm/boards/phytec-phyflex-imx6/lowlevel.c b/arch/arm/boards/phytec-phyflex-imx6/lowlevel.c
> index 367d4dc..46f788c 100644
> --- a/arch/arm/boards/phytec-phyflex-imx6/lowlevel.c
> +++ b/arch/arm/boards/phytec-phyflex-imx6/lowlevel.c
> @@ -27,19 +27,11 @@
> 
>  static inline void setup_uart(void)
>  {
> -	void __iomem *ccmbase = (void *)MX6_CCM_BASE_ADDR;
>  	void __iomem *iomuxbase = (void *)MX6_IOMUXC_BASE_ADDR;
> 
>  	writel(0x4, iomuxbase + 0x01f8);
> 
> -	writel(0xffffffff, ccmbase + 0x68);
> -	writel(0xffffffff, ccmbase + 0x6c);
> -	writel(0xffffffff, ccmbase + 0x70);
> -	writel(0xffffffff, ccmbase + 0x74);
> -	writel(0xffffffff, ccmbase + 0x78);
> -	writel(0xffffffff, ccmbase + 0x7c);
> -	writel(0xffffffff, ccmbase + 0x80);
> -
> +	ungate_all_peripherals();
>  	setup_uart_ll();
> 
>  	putc_ll('>');
> diff --git a/arch/arm/boards/variscite-mx6/lowlevel.c b/arch/arm/boards/variscite-mx6/lowlevel.c
> index b0ab424..01878e6 100644
> --- a/arch/arm/boards/variscite-mx6/lowlevel.c
> +++ b/arch/arm/boards/variscite-mx6/lowlevel.c
> @@ -28,20 +28,12 @@
> 
>  static inline void setup_uart(void)
>  {
> -	void __iomem *ccmbase = (void *)MX6_CCM_BASE_ADDR;
>  	void __iomem *iomuxbase = (void *)MX6_IOMUXC_BASE_ADDR;
> 
>  	writel(0x03, iomuxbase + 0x0280);
>  	writel(0x03, iomuxbase + 0x0284);
> 
> -	writel(0xffffffff, ccmbase + 0x68);
> -	writel(0xffffffff, ccmbase + 0x6c);
> -	writel(0xffffffff, ccmbase + 0x70);
> -	writel(0xffffffff, ccmbase + 0x74);
> -	writel(0xffffffff, ccmbase + 0x78);
> -	writel(0xffffffff, ccmbase + 0x7c);
> -	writel(0xffffffff, ccmbase + 0x80);
> -
> +	ungate_all_peripherals();
>  	setup_uart_ll();
> 
>  	putc_ll('>');
> diff --git a/arch/arm/mach-imx/include/mach/debug_ll.h b/arch/arm/mach-imx/include/mach/debug_ll.h
> index 5b0b33b..d831a7d 100644
> --- a/arch/arm/mach-imx/include/mach/debug_ll.h
> +++ b/arch/arm/mach-imx/include/mach/debug_ll.h
> @@ -3,6 +3,7 @@
> 
>  #include <io.h>
>  #include <config.h>
> +#include <common.h>
>  #include <mach/imx1-regs.h>
>  #include <mach/imx21-regs.h>
>  #include <mach/imx25-regs.h>
> @@ -71,6 +72,18 @@ static inline void setup_uart_ll(void)
> 
>  #endif
> 
> +#define __IMX_CCM_BASE(soc) soc##_CCM_BASE_ADDR
> +#define IMX_CCM_BASE(soc) __IMX_CCM_BASE(soc)
> +
> +static inline void ungate_all_peripherals(void)
> +{
> +	int i;
> +	void __iomem *ccmbase = IOMEM(IMX_CCM_BASE(IMX_DEBUG_SOC));
> +
> +	for (i = 0x68; i <= 0x80; i += 4)
> +		writel(0xffffffff, ccmbase + i);
> +}
> +

Please add a imx6_ namespace to this function. The calling code always
knows that it is running on imx6, so you can use IMX6_CCM_BASE_ADDR
directly rather than using soc##_. The function above is imx6 specific
anyway since only this SoC has the gate registers on 0x68..0x80.

Sascha

-- 
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  reply	other threads:[~2015-05-04  7:01 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-05-03  2:26 [RFC, PATCH] i.MX: Add provisions to boot from IRAM Andrey Smirnov
2015-05-03  2:26 ` [PATCH 1/8] i.MX: Move UART definitions into a separate file Andrey Smirnov
2015-05-04  7:08   ` Sascha Hauer
2015-05-03  2:26 ` [PATCH 2/8] i.MX: serial: Add constants for UART clock divisor Andrey Smirnov
2015-05-03  2:26 ` [PATCH 3/8] i.MX: serial: Add baud rate calculation convenience functions Andrey Smirnov
2015-05-03  2:26 ` [PATCH 4/8] i.MX51: babbage: Implement CONFIG_DEBUG_LL Andrey Smirnov
2015-05-04  6:43   ` Sascha Hauer
2015-05-03  2:26 ` [PATCH 5/8] i.MX: serial: Add setup_uart_ll function Andrey Smirnov
2015-05-04  6:53   ` Sascha Hauer
2015-05-03  2:26 ` [PATCH 6/8] i.MX: serial: Convert i.MX51 and i.MX6 to use 'setup_uart_ll' Andrey Smirnov
2015-05-04  6:57   ` Sascha Hauer
2015-05-03  2:26 ` [PATCH 7/8] i.MX: serial: Distil common clock ungating code Andrey Smirnov
2015-05-04  7:01   ` Sascha Hauer [this message]
2015-05-04 18:04     ` Andrey Smirnov
2015-05-04 19:52       ` Sascha Hauer
2015-05-03  2:26 ` [PATCH 8/8] Makefile.lib: Make 'check_file_size' more flexible Andrey Smirnov
2015-05-04  7:14 ` [RFC, PATCH] i.MX: Add provisions to boot from IRAM Sascha Hauer

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