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authorWolfram Sang <wsa+renesas@sang-engineering.com>2015-06-09 10:14:40 +0300
committerWolfram Sang <wsa@the-dreams.de>2015-06-17 13:40:47 +0300
commitb6eba5598dc69d1f3a79183d2521da53d336006e (patch)
tree49e4aa6c85eb737bd237b2d1642bce27204b777e
parent3ded3743a026e0762fa74467eafc66ecc1c484cc (diff)
downloadlinux-b6eba5598dc69d1f3a79183d2521da53d336006e.tar.xz
ARM: shmobile: r8a7740: remove I2C errata handling
This is now done in the I2C driver. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Acked-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
-rw-r--r--arch/arm/mach-shmobile/setup-r8a7740.c55
1 files changed, 0 insertions, 55 deletions
diff --git a/arch/arm/mach-shmobile/setup-r8a7740.c b/arch/arm/mach-shmobile/setup-r8a7740.c
index 9832e48396a4..00291cc1772d 100644
--- a/arch/arm/mach-shmobile/setup-r8a7740.c
+++ b/arch/arm/mach-shmobile/setup-r8a7740.c
@@ -13,7 +13,6 @@
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
-#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/kernel.h>
#include <linux/init.h>
@@ -690,56 +689,6 @@ void __init r8a7740_meram_workaround(void)
}
}
-#define ICCR 0x0004
-#define ICSTART 0x0070
-
-#define i2c_read(reg, offset) ioread8(reg + offset)
-#define i2c_write(reg, offset, data) iowrite8(data, reg + offset)
-
-/*
- * r8a7740 chip has lasting errata on I2C I/O pad reset.
- * this is work-around for it.
- */
-static void r8a7740_i2c_workaround(struct platform_device *pdev)
-{
- struct resource *res;
- void __iomem *reg;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (unlikely(!res)) {
- pr_err("r8a7740 i2c workaround fail (cannot find resource)\n");
- return;
- }
-
- reg = ioremap(res->start, resource_size(res));
- if (unlikely(!reg)) {
- pr_err("r8a7740 i2c workaround fail (cannot map IO)\n");
- return;
- }
-
- i2c_write(reg, ICCR, i2c_read(reg, ICCR) | 0x80);
- i2c_read(reg, ICCR); /* dummy read */
-
- i2c_write(reg, ICSTART, i2c_read(reg, ICSTART) | 0x10);
- i2c_read(reg, ICSTART); /* dummy read */
-
- udelay(10);
-
- i2c_write(reg, ICCR, 0x01);
- i2c_write(reg, ICSTART, 0x00);
-
- udelay(10);
-
- i2c_write(reg, ICCR, 0x10);
- udelay(10);
- i2c_write(reg, ICCR, 0x00);
- udelay(10);
- i2c_write(reg, ICCR, 0x10);
- udelay(10);
-
- iounmap(reg);
-}
-
void __init r8a7740_add_standard_devices(void)
{
static struct pm_domain_device domain_devices[] __initdata = {
@@ -766,10 +715,6 @@ void __init r8a7740_add_standard_devices(void)
{ "A3SP", &usb_dma_device },
};
- /* I2C work-around */
- r8a7740_i2c_workaround(&i2c0_device);
- r8a7740_i2c_workaround(&i2c1_device);
-
r8a7740_init_pm_domains();
/* add devices */