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* [PATCH] ARM: i.MX7: don't hardcode UART1 in imx7_early_setup_uart_clock
@ 2022-10-10  7:48 Ahmad Fatoum
  2022-10-12 12:32 ` Sascha Hauer
  2022-10-27 18:35 ` Bruno Thomsen
  0 siblings, 2 replies; 3+ messages in thread
From: Ahmad Fatoum @ 2022-10-10  7:48 UTC (permalink / raw)
  To: barebox
  Cc: Johannes Zink, Lars Pedersen, Bruno Thomsen, Andrey Smirnov,
	Ahmad Fatoum

imx7_early_setup_uart_clock() has a very generic sounding name, but so
far only set up clocks for UART1. This can lead board code authors
astray that intend to user a different UART for DEBUG_LL.

This issue affects board code for kamstrup-mx7-concentrator, meerkat96
and zii-imx7d-dev, which use UART4, UART6 and UART2 respectively.

As I don't have this boards available to test and clock changes may have
adverse effect elsewhere, we have all existing users setup UART1 as
before, but note with a comment that this may not be the original
author's intention.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
I have CC'd authors of the three likely misconfigured boards,
in case they want to fix them and test.
---
 arch/arm/boards/ac-sxb/lowlevel.c             |  2 +-
 .../boards/freescale-mx7-sabresd/lowlevel.c   |  2 +-
 .../kamstrup-mx7-concentrator/lowlevel.c      |  3 ++-
 arch/arm/boards/meerkat96/lowlevel.c          |  3 ++-
 arch/arm/boards/zii-imx7d-dev/lowlevel.c      |  3 ++-
 .../arm/mach-imx/include/mach/imx7-ccm-regs.h | 21 +++++++++----------
 6 files changed, 18 insertions(+), 16 deletions(-)

diff --git a/arch/arm/boards/ac-sxb/lowlevel.c b/arch/arm/boards/ac-sxb/lowlevel.c
index a910555f9bd7..a26454968304 100644
--- a/arch/arm/boards/ac-sxb/lowlevel.c
+++ b/arch/arm/boards/ac-sxb/lowlevel.c
@@ -93,7 +93,7 @@ extern char __dtb_z_ac_sxb_start[];
 
 static inline void setup_uart(void)
 {
-	imx7_early_setup_uart_clock();
+	imx7_early_setup_uart_clock(1);
 
 	imx7_setup_pad(MX7D_PAD_UART1_TX_DATA__UART1_DCE_TX);
 
diff --git a/arch/arm/boards/freescale-mx7-sabresd/lowlevel.c b/arch/arm/boards/freescale-mx7-sabresd/lowlevel.c
index a8733d62091f..6d393bf2b10e 100644
--- a/arch/arm/boards/freescale-mx7-sabresd/lowlevel.c
+++ b/arch/arm/boards/freescale-mx7-sabresd/lowlevel.c
@@ -17,7 +17,7 @@ extern char __dtb_imx7d_sdb_start[];
 
 static inline void setup_uart(void)
 {
-	imx7_early_setup_uart_clock();
+	imx7_early_setup_uart_clock(1);
 
 	imx7_setup_pad(MX7D_PAD_UART1_TX_DATA__UART1_DCE_TX);
 
diff --git a/arch/arm/boards/kamstrup-mx7-concentrator/lowlevel.c b/arch/arm/boards/kamstrup-mx7-concentrator/lowlevel.c
index 4a9eae80d153..511f01757c46 100644
--- a/arch/arm/boards/kamstrup-mx7-concentrator/lowlevel.c
+++ b/arch/arm/boards/kamstrup-mx7-concentrator/lowlevel.c
@@ -17,7 +17,8 @@ extern char __dtb_z_imx7d_flex_concentrator_mfg_start[];
 
 static inline void setup_uart(void)
 {
-	imx7_early_setup_uart_clock();
+	/* FIXME: Below UART4 is muxed, not UART1 */
+	imx7_early_setup_uart_clock(1);
 
 	imx7_setup_pad(MX7D_PAD_SAI2_TX_BCLK__UART4_DCE_TX);
 
diff --git a/arch/arm/boards/meerkat96/lowlevel.c b/arch/arm/boards/meerkat96/lowlevel.c
index 1c9baeacfb2a..e65726ef1c27 100644
--- a/arch/arm/boards/meerkat96/lowlevel.c
+++ b/arch/arm/boards/meerkat96/lowlevel.c
@@ -14,7 +14,8 @@ extern char __dtb_z_imx7d_meerkat96_start[];
 
 static void setup_uart(void)
 {
-	imx7_early_setup_uart_clock();
+	/* FIXME: Below UART6 is muxed, not UART1 */
+	imx7_early_setup_uart_clock(1);
 	imx7_setup_pad(MX7D_PAD_SD1_WP__UART6_DCE_TX);
 	imx7_uart_setup_ll();
 	putc_ll('>');
diff --git a/arch/arm/boards/zii-imx7d-dev/lowlevel.c b/arch/arm/boards/zii-imx7d-dev/lowlevel.c
index 7579a2a8a050..0e316b602436 100644
--- a/arch/arm/boards/zii-imx7d-dev/lowlevel.c
+++ b/arch/arm/boards/zii-imx7d-dev/lowlevel.c
@@ -23,7 +23,8 @@ extern char __dtb_z_imx7d_zii_rmu2_start[];
 
 static inline void setup_uart(void)
 {
-	imx7_early_setup_uart_clock();
+	/* FIXME: Below UART2 is muxed, not UART1 */
+	imx7_early_setup_uart_clock(1);
 
 	imx7_setup_pad(MX7D_PAD_UART2_TX_DATA__UART2_DCE_TX);
 
diff --git a/arch/arm/mach-imx/include/mach/imx7-ccm-regs.h b/arch/arm/mach-imx/include/mach/imx7-ccm-regs.h
index aecf9a26d017..0ef0742bb65d 100644
--- a/arch/arm/mach-imx/include/mach/imx7-ccm-regs.h
+++ b/arch/arm/mach-imx/include/mach/imx7-ccm-regs.h
@@ -39,16 +39,15 @@
 #define IMX7_CCM_CCGR_SETTINGn_NEEDED_RUN_WAIT(n)	IMX7_CCM_CCGR_SETTINGn(n, 0b10)
 #define IMX7_CCM_CCGR_SETTINGn_NEEDED(n)		IMX7_CCM_CCGR_SETTINGn(n, 0b11)
 
-static inline void imx7_early_setup_uart_clock(void)
-{
-	void __iomem *ccm   = IOMEM(MX7_CCM_BASE_ADDR);
-
-	writel(IMX7_CCM_CCGR_SETTINGn_NEEDED(0),
-	       ccm + IMX7_CCM_CCGRn_CLR(IMX7_CCM_CCGR_UART1));
-	writel(IMX7_CCM_TARGET_ROOTn_ENABLE | IMX7_UART1_CLK_ROOT__OSC_24M,
-	       ccm + IMX7_CCM_TARGET_ROOTn(IMX7_UART1_CLK_ROOT));
-	writel(IMX7_CCM_CCGR_SETTINGn_NEEDED(0),
-	       ccm + IMX7_CCM_CCGRn_SET(IMX7_CCM_CCGR_UART1));
-}
+/* UART counting starts for 1, like in the datasheet/dt-bindings */
+#define imx7_early_setup_uart_clock(uart) do { \
+	void __iomem *ccm   = IOMEM(MX7_CCM_BASE_ADDR); \
+	writel(IMX7_CCM_CCGR_SETTINGn_NEEDED(0), \
+	       ccm + IMX7_CCM_CCGRn_CLR(IMX7_CCM_CCGR_UART ## uart)); \
+	writel(IMX7_CCM_TARGET_ROOTn_ENABLE | IMX7_UART ## uart ## _CLK_ROOT__OSC_24M, \
+	       ccm + IMX7_CCM_TARGET_ROOTn(IMX7_UART ## uart ## _CLK_ROOT)); \
+	writel(IMX7_CCM_CCGR_SETTINGn_NEEDED(0), \
+	       ccm + IMX7_CCM_CCGRn_SET(IMX7_CCM_CCGR_UART ## uart)); \
+} while (0)
 
 #endif
-- 
2.30.2




^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: [PATCH] ARM: i.MX7: don't hardcode UART1 in imx7_early_setup_uart_clock
  2022-10-10  7:48 [PATCH] ARM: i.MX7: don't hardcode UART1 in imx7_early_setup_uart_clock Ahmad Fatoum
@ 2022-10-12 12:32 ` Sascha Hauer
  2022-10-27 18:35 ` Bruno Thomsen
  1 sibling, 0 replies; 3+ messages in thread
From: Sascha Hauer @ 2022-10-12 12:32 UTC (permalink / raw)
  To: Ahmad Fatoum
  Cc: barebox, Johannes Zink, Lars Pedersen, Bruno Thomsen, Andrey Smirnov

On Mon, Oct 10, 2022 at 09:48:34AM +0200, Ahmad Fatoum wrote:
> imx7_early_setup_uart_clock() has a very generic sounding name, but so
> far only set up clocks for UART1. This can lead board code authors
> astray that intend to user a different UART for DEBUG_LL.
> 
> This issue affects board code for kamstrup-mx7-concentrator, meerkat96
> and zii-imx7d-dev, which use UART4, UART6 and UART2 respectively.
> 
> As I don't have this boards available to test and clock changes may have
> adverse effect elsewhere, we have all existing users setup UART1 as
> before, but note with a comment that this may not be the original
> author's intention.
> 
> Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
> ---
> I have CC'd authors of the three likely misconfigured boards,
> in case they want to fix them and test.
> ---
>  arch/arm/boards/ac-sxb/lowlevel.c             |  2 +-
>  .../boards/freescale-mx7-sabresd/lowlevel.c   |  2 +-
>  .../kamstrup-mx7-concentrator/lowlevel.c      |  3 ++-
>  arch/arm/boards/meerkat96/lowlevel.c          |  3 ++-
>  arch/arm/boards/zii-imx7d-dev/lowlevel.c      |  3 ++-
>  .../arm/mach-imx/include/mach/imx7-ccm-regs.h | 21 +++++++++----------
>  6 files changed, 18 insertions(+), 16 deletions(-)
> 
> diff --git a/arch/arm/boards/ac-sxb/lowlevel.c b/arch/arm/boards/ac-sxb/lowlevel.c
> index a910555f9bd7..a26454968304 100644
> --- a/arch/arm/boards/ac-sxb/lowlevel.c
> +++ b/arch/arm/boards/ac-sxb/lowlevel.c
> @@ -93,7 +93,7 @@ extern char __dtb_z_ac_sxb_start[];
>  
>  static inline void setup_uart(void)
>  {
> -	imx7_early_setup_uart_clock();
> +	imx7_early_setup_uart_clock(1);
>  
>  	imx7_setup_pad(MX7D_PAD_UART1_TX_DATA__UART1_DCE_TX);
>  
> diff --git a/arch/arm/boards/freescale-mx7-sabresd/lowlevel.c b/arch/arm/boards/freescale-mx7-sabresd/lowlevel.c
> index a8733d62091f..6d393bf2b10e 100644
> --- a/arch/arm/boards/freescale-mx7-sabresd/lowlevel.c
> +++ b/arch/arm/boards/freescale-mx7-sabresd/lowlevel.c
> @@ -17,7 +17,7 @@ extern char __dtb_imx7d_sdb_start[];
>  
>  static inline void setup_uart(void)
>  {
> -	imx7_early_setup_uart_clock();
> +	imx7_early_setup_uart_clock(1);
>  
>  	imx7_setup_pad(MX7D_PAD_UART1_TX_DATA__UART1_DCE_TX);
>  
> diff --git a/arch/arm/boards/kamstrup-mx7-concentrator/lowlevel.c b/arch/arm/boards/kamstrup-mx7-concentrator/lowlevel.c
> index 4a9eae80d153..511f01757c46 100644
> --- a/arch/arm/boards/kamstrup-mx7-concentrator/lowlevel.c
> +++ b/arch/arm/boards/kamstrup-mx7-concentrator/lowlevel.c
> @@ -17,7 +17,8 @@ extern char __dtb_z_imx7d_flex_concentrator_mfg_start[];
>  
>  static inline void setup_uart(void)
>  {
> -	imx7_early_setup_uart_clock();
> +	/* FIXME: Below UART4 is muxed, not UART1 */
> +	imx7_early_setup_uart_clock(1);
>  
>  	imx7_setup_pad(MX7D_PAD_SAI2_TX_BCLK__UART4_DCE_TX);
>  
> diff --git a/arch/arm/boards/meerkat96/lowlevel.c b/arch/arm/boards/meerkat96/lowlevel.c
> index 1c9baeacfb2a..e65726ef1c27 100644
> --- a/arch/arm/boards/meerkat96/lowlevel.c
> +++ b/arch/arm/boards/meerkat96/lowlevel.c
> @@ -14,7 +14,8 @@ extern char __dtb_z_imx7d_meerkat96_start[];
>  
>  static void setup_uart(void)
>  {
> -	imx7_early_setup_uart_clock();
> +	/* FIXME: Below UART6 is muxed, not UART1 */
> +	imx7_early_setup_uart_clock(1);
>  	imx7_setup_pad(MX7D_PAD_SD1_WP__UART6_DCE_TX);
>  	imx7_uart_setup_ll();
>  	putc_ll('>');
> diff --git a/arch/arm/boards/zii-imx7d-dev/lowlevel.c b/arch/arm/boards/zii-imx7d-dev/lowlevel.c
> index 7579a2a8a050..0e316b602436 100644
> --- a/arch/arm/boards/zii-imx7d-dev/lowlevel.c
> +++ b/arch/arm/boards/zii-imx7d-dev/lowlevel.c
> @@ -23,7 +23,8 @@ extern char __dtb_z_imx7d_zii_rmu2_start[];
>  
>  static inline void setup_uart(void)
>  {
> -	imx7_early_setup_uart_clock();
> +	/* FIXME: Below UART2 is muxed, not UART1 */
> +	imx7_early_setup_uart_clock(1);
>  
>  	imx7_setup_pad(MX7D_PAD_UART2_TX_DATA__UART2_DCE_TX);
>  
> diff --git a/arch/arm/mach-imx/include/mach/imx7-ccm-regs.h b/arch/arm/mach-imx/include/mach/imx7-ccm-regs.h
> index aecf9a26d017..0ef0742bb65d 100644
> --- a/arch/arm/mach-imx/include/mach/imx7-ccm-regs.h
> +++ b/arch/arm/mach-imx/include/mach/imx7-ccm-regs.h
> @@ -39,16 +39,15 @@
>  #define IMX7_CCM_CCGR_SETTINGn_NEEDED_RUN_WAIT(n)	IMX7_CCM_CCGR_SETTINGn(n, 0b10)
>  #define IMX7_CCM_CCGR_SETTINGn_NEEDED(n)		IMX7_CCM_CCGR_SETTINGn(n, 0b11)
>  
> -static inline void imx7_early_setup_uart_clock(void)
> -{
> -	void __iomem *ccm   = IOMEM(MX7_CCM_BASE_ADDR);
> -
> -	writel(IMX7_CCM_CCGR_SETTINGn_NEEDED(0),
> -	       ccm + IMX7_CCM_CCGRn_CLR(IMX7_CCM_CCGR_UART1));
> -	writel(IMX7_CCM_TARGET_ROOTn_ENABLE | IMX7_UART1_CLK_ROOT__OSC_24M,
> -	       ccm + IMX7_CCM_TARGET_ROOTn(IMX7_UART1_CLK_ROOT));
> -	writel(IMX7_CCM_CCGR_SETTINGn_NEEDED(0),
> -	       ccm + IMX7_CCM_CCGRn_SET(IMX7_CCM_CCGR_UART1));
> -}
> +/* UART counting starts for 1, like in the datasheet/dt-bindings */
> +#define imx7_early_setup_uart_clock(uart) do { \
> +	void __iomem *ccm   = IOMEM(MX7_CCM_BASE_ADDR); \
> +	writel(IMX7_CCM_CCGR_SETTINGn_NEEDED(0), \
> +	       ccm + IMX7_CCM_CCGRn_CLR(IMX7_CCM_CCGR_UART ## uart)); \

You could do:

#define IMX7_CCM_CCGR_UART(n)	(148 + (n))		/* 0 <= n <= 5 */
#define IMX7_UART_CLK_ROOT(n)	(0xaf80 + (n) * 0x80)	/* 0 <= n <= 5 */

to avoid converting this into a macro.

Sascha

-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |



^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: [PATCH] ARM: i.MX7: don't hardcode UART1 in imx7_early_setup_uart_clock
  2022-10-10  7:48 [PATCH] ARM: i.MX7: don't hardcode UART1 in imx7_early_setup_uart_clock Ahmad Fatoum
  2022-10-12 12:32 ` Sascha Hauer
@ 2022-10-27 18:35 ` Bruno Thomsen
  1 sibling, 0 replies; 3+ messages in thread
From: Bruno Thomsen @ 2022-10-27 18:35 UTC (permalink / raw)
  To: Ahmad Fatoum; +Cc: barebox, Johannes Zink, Lars Pedersen, Andrey Smirnov

Hi Ahmad,

Den man. 10. okt. 2022 kl. 09.48 skrev Ahmad Fatoum <a.fatoum@pengutronix.de>:
>
> imx7_early_setup_uart_clock() has a very generic sounding name, but so
> far only set up clocks for UART1. This can lead board code authors
> astray that intend to user a different UART for DEBUG_LL.
>
> This issue affects board code for kamstrup-mx7-concentrator, meerkat96
> and zii-imx7d-dev, which use UART4, UART6 and UART2 respectively.
>
> As I don't have this boards available to test and clock changes may have
> adverse effect elsewhere, we have all existing users setup UART1 as
> before, but note with a comment that this may not be the original
> author's intention.
>
> Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
> ---
> I have CC'd authors of the three likely misconfigured boards,
> in case they want to fix them and test.
> ---
>  arch/arm/boards/ac-sxb/lowlevel.c             |  2 +-
>  .../boards/freescale-mx7-sabresd/lowlevel.c   |  2 +-
>  .../kamstrup-mx7-concentrator/lowlevel.c      |  3 ++-
>  arch/arm/boards/meerkat96/lowlevel.c          |  3 ++-
>  arch/arm/boards/zii-imx7d-dev/lowlevel.c      |  3 ++-
>  .../arm/mach-imx/include/mach/imx7-ccm-regs.h | 21 +++++++++----------
>  6 files changed, 18 insertions(+), 16 deletions(-)
>
> diff --git a/arch/arm/boards/ac-sxb/lowlevel.c b/arch/arm/boards/ac-sxb/lowlevel.c
> index a910555f9bd7..a26454968304 100644
> --- a/arch/arm/boards/ac-sxb/lowlevel.c
> +++ b/arch/arm/boards/ac-sxb/lowlevel.c
> @@ -93,7 +93,7 @@ extern char __dtb_z_ac_sxb_start[];
>
>  static inline void setup_uart(void)
>  {
> -       imx7_early_setup_uart_clock();
> +       imx7_early_setup_uart_clock(1);
>
>         imx7_setup_pad(MX7D_PAD_UART1_TX_DATA__UART1_DCE_TX);
>
> diff --git a/arch/arm/boards/freescale-mx7-sabresd/lowlevel.c b/arch/arm/boards/freescale-mx7-sabresd/lowlevel.c
> index a8733d62091f..6d393bf2b10e 100644
> --- a/arch/arm/boards/freescale-mx7-sabresd/lowlevel.c
> +++ b/arch/arm/boards/freescale-mx7-sabresd/lowlevel.c
> @@ -17,7 +17,7 @@ extern char __dtb_imx7d_sdb_start[];
>
>  static inline void setup_uart(void)
>  {
> -       imx7_early_setup_uart_clock();
> +       imx7_early_setup_uart_clock(1);
>
>         imx7_setup_pad(MX7D_PAD_UART1_TX_DATA__UART1_DCE_TX);
>
> diff --git a/arch/arm/boards/kamstrup-mx7-concentrator/lowlevel.c b/arch/arm/boards/kamstrup-mx7-concentrator/lowlevel.c
> index 4a9eae80d153..511f01757c46 100644
> --- a/arch/arm/boards/kamstrup-mx7-concentrator/lowlevel.c
> +++ b/arch/arm/boards/kamstrup-mx7-concentrator/lowlevel.c
> @@ -17,7 +17,8 @@ extern char __dtb_z_imx7d_flex_concentrator_mfg_start[];
>
>  static inline void setup_uart(void)
>  {
> -       imx7_early_setup_uart_clock();
> +       /* FIXME: Below UART4 is muxed, not UART1 */
> +       imx7_early_setup_uart_clock(1);
>

You are right, this should setup UART4 and not UART1.

Reviewed-by: Bruno Thomsen <bruno.thomsen@gmail.com>

>         imx7_setup_pad(MX7D_PAD_SAI2_TX_BCLK__UART4_DCE_TX);
>
> diff --git a/arch/arm/boards/meerkat96/lowlevel.c b/arch/arm/boards/meerkat96/lowlevel.c
> index 1c9baeacfb2a..e65726ef1c27 100644
> --- a/arch/arm/boards/meerkat96/lowlevel.c
> +++ b/arch/arm/boards/meerkat96/lowlevel.c
> @@ -14,7 +14,8 @@ extern char __dtb_z_imx7d_meerkat96_start[];
>
>  static void setup_uart(void)
>  {
> -       imx7_early_setup_uart_clock();
> +       /* FIXME: Below UART6 is muxed, not UART1 */
> +       imx7_early_setup_uart_clock(1);
>         imx7_setup_pad(MX7D_PAD_SD1_WP__UART6_DCE_TX);
>         imx7_uart_setup_ll();
>         putc_ll('>');
> diff --git a/arch/arm/boards/zii-imx7d-dev/lowlevel.c b/arch/arm/boards/zii-imx7d-dev/lowlevel.c
> index 7579a2a8a050..0e316b602436 100644
> --- a/arch/arm/boards/zii-imx7d-dev/lowlevel.c
> +++ b/arch/arm/boards/zii-imx7d-dev/lowlevel.c
> @@ -23,7 +23,8 @@ extern char __dtb_z_imx7d_zii_rmu2_start[];
>
>  static inline void setup_uart(void)
>  {
> -       imx7_early_setup_uart_clock();
> +       /* FIXME: Below UART2 is muxed, not UART1 */
> +       imx7_early_setup_uart_clock(1);
>
>         imx7_setup_pad(MX7D_PAD_UART2_TX_DATA__UART2_DCE_TX);
>
> diff --git a/arch/arm/mach-imx/include/mach/imx7-ccm-regs.h b/arch/arm/mach-imx/include/mach/imx7-ccm-regs.h
> index aecf9a26d017..0ef0742bb65d 100644
> --- a/arch/arm/mach-imx/include/mach/imx7-ccm-regs.h
> +++ b/arch/arm/mach-imx/include/mach/imx7-ccm-regs.h
> @@ -39,16 +39,15 @@
>  #define IMX7_CCM_CCGR_SETTINGn_NEEDED_RUN_WAIT(n)      IMX7_CCM_CCGR_SETTINGn(n, 0b10)
>  #define IMX7_CCM_CCGR_SETTINGn_NEEDED(n)               IMX7_CCM_CCGR_SETTINGn(n, 0b11)
>
> -static inline void imx7_early_setup_uart_clock(void)
> -{
> -       void __iomem *ccm   = IOMEM(MX7_CCM_BASE_ADDR);
> -
> -       writel(IMX7_CCM_CCGR_SETTINGn_NEEDED(0),
> -              ccm + IMX7_CCM_CCGRn_CLR(IMX7_CCM_CCGR_UART1));
> -       writel(IMX7_CCM_TARGET_ROOTn_ENABLE | IMX7_UART1_CLK_ROOT__OSC_24M,
> -              ccm + IMX7_CCM_TARGET_ROOTn(IMX7_UART1_CLK_ROOT));
> -       writel(IMX7_CCM_CCGR_SETTINGn_NEEDED(0),
> -              ccm + IMX7_CCM_CCGRn_SET(IMX7_CCM_CCGR_UART1));
> -}
> +/* UART counting starts for 1, like in the datasheet/dt-bindings */
> +#define imx7_early_setup_uart_clock(uart) do { \
> +       void __iomem *ccm   = IOMEM(MX7_CCM_BASE_ADDR); \
> +       writel(IMX7_CCM_CCGR_SETTINGn_NEEDED(0), \
> +              ccm + IMX7_CCM_CCGRn_CLR(IMX7_CCM_CCGR_UART ## uart)); \
> +       writel(IMX7_CCM_TARGET_ROOTn_ENABLE | IMX7_UART ## uart ## _CLK_ROOT__OSC_24M, \
> +              ccm + IMX7_CCM_TARGET_ROOTn(IMX7_UART ## uart ## _CLK_ROOT)); \
> +       writel(IMX7_CCM_CCGR_SETTINGn_NEEDED(0), \
> +              ccm + IMX7_CCM_CCGRn_SET(IMX7_CCM_CCGR_UART ## uart)); \
> +} while (0)
>
>  #endif
> --
> 2.30.2
>



^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2022-10-27 18:37 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-10-10  7:48 [PATCH] ARM: i.MX7: don't hardcode UART1 in imx7_early_setup_uart_clock Ahmad Fatoum
2022-10-12 12:32 ` Sascha Hauer
2022-10-27 18:35 ` Bruno Thomsen

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