linux-kernel - [PATCH] ARM: at91: remove ISI code for AT91SAM9263

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Message-ID: <1400142868.20469.12.camel@x220>
Date:	Thu, 15 May 2014 10:34:28 +0200
From:	Paul Bolle <pebolle@...cali.nl>
To:	Andrew Victor <linux@...im.org.za>,
	Nicolas Ferre <nicolas.ferre@...el.com>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Russell King <linux@....linux.org.uk>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] ARM: at91: remove ISI code for AT91SAM9263

In v2.6.25 code was added for an Image Sensor Interface (ISI) for
AT91SAM9263. That code depended on the Kconfig macro
CONFIG_VIDEO_AT91_ISI and its MODULE variant. The related Kconfig symbol
has never been added to the tree. The net effect of this was that
at91_add_device_isi() was a NOP. No one noticed because no callers of
that function were added to the tree at that time.

The first caller of a function with that name was added in v3.4. But
that caller apparently only called the function defined for AT91SAM9G45.
(that function was also added in v3.4). So even then AT91SAM9263's NOP
version of at91_add_device_isi() remained unused. This means that the
ISI code for AT91SAM9263 can be removed.

Signed-off-by: Paul Bolle <pebolle@...cali.nl>
---
Untested!

Could someone please verify that this definition of
at91_add_device_isi() really never will be called.

 arch/arm/mach-at91/at91sam9263_devices.c | 57 --------------------------------
 1 file changed, 57 deletions(-)

diff --git a/arch/arm/mach-at91/at91sam9263_devices.c b/arch/arm/mach-at91/at91sam9263_devices.c
index 43d53d6156dd..f2dab0a872a1 100644
--- a/arch/arm/mach-at91/at91sam9263_devices.c
+++ b/arch/arm/mach-at91/at91sam9263_devices.c
@@ -897,63 +897,6 @@ void __init at91_add_device_lcdc(struct atmel_lcdfb_pdata *data) {}
 

 /* --------------------------------------------------------------------
- *  Image Sensor Interface
- * -------------------------------------------------------------------- */
-
-#if defined(CONFIG_VIDEO_AT91_ISI) || defined(CONFIG_VIDEO_AT91_ISI_MODULE)
-
-struct resource isi_resources[] = {
-	[0] = {
-		.start	= AT91SAM9263_BASE_ISI,
-		.end	= AT91SAM9263_BASE_ISI + SZ_16K - 1,
-		.flags	= IORESOURCE_MEM,
-	},
-	[1] = {
-		.start	= NR_IRQS_LEGACY + AT91SAM9263_ID_ISI,
-		.end	= NR_IRQS_LEGACY + AT91SAM9263_ID_ISI,
-		.flags	= IORESOURCE_IRQ,
-	},
-};
-
-static struct platform_device at91sam9263_isi_device = {
-	.name		= "at91_isi",
-	.id		= -1,
-	.resource	= isi_resources,
-	.num_resources	= ARRAY_SIZE(isi_resources),
-};
-
-void __init at91_add_device_isi(struct isi_platform_data *data,
-		bool use_pck_as_mck)
-{
-	at91_set_A_periph(AT91_PIN_PE0, 0);	/* ISI_D0 */
-	at91_set_A_periph(AT91_PIN_PE1, 0);	/* ISI_D1 */
-	at91_set_A_periph(AT91_PIN_PE2, 0);	/* ISI_D2 */
-	at91_set_A_periph(AT91_PIN_PE3, 0);	/* ISI_D3 */
-	at91_set_A_periph(AT91_PIN_PE4, 0);	/* ISI_D4 */
-	at91_set_A_periph(AT91_PIN_PE5, 0);	/* ISI_D5 */
-	at91_set_A_periph(AT91_PIN_PE6, 0);	/* ISI_D6 */
-	at91_set_A_periph(AT91_PIN_PE7, 0);	/* ISI_D7 */
-	at91_set_A_periph(AT91_PIN_PE8, 0);	/* ISI_PCK */
-	at91_set_A_periph(AT91_PIN_PE9, 0);	/* ISI_HSYNC */
-	at91_set_A_periph(AT91_PIN_PE10, 0);	/* ISI_VSYNC */
-	at91_set_B_periph(AT91_PIN_PE12, 0);	/* ISI_PD8 */
-	at91_set_B_periph(AT91_PIN_PE13, 0);	/* ISI_PD9 */
-	at91_set_B_periph(AT91_PIN_PE14, 0);	/* ISI_PD10 */
-	at91_set_B_periph(AT91_PIN_PE15, 0);	/* ISI_PD11 */
-
-	if (use_pck_as_mck) {
-		at91_set_B_periph(AT91_PIN_PE11, 0);	/* ISI_MCK (PCK3) */
-
-		/* TODO: register the PCK for ISI_MCK and set its parent */
-	}
-}
-#else
-void __init at91_add_device_isi(struct isi_platform_data *data,
-		bool use_pck_as_mck) {}
-#endif
-
-
-/* --------------------------------------------------------------------
  *  Timer/Counter block
  * -------------------------------------------------------------------- */
 
-- 
1.9.0

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