42 lines
1.4 KiB
Diff
42 lines
1.4 KiB
Diff
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From 7776b6ebf1063d2f9fac33313c8d049b424fce46 Mon Sep 17 00:00:00 2001
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From: popcornmix <popcornmix@gmail.com>
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Date: Sat, 8 Jun 2013 22:14:13 +0100
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Subject: [PATCH 066/174] Only init gpio pins of selected i2c bus
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---
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drivers/i2c/busses/i2c-bcm2708.c | 8 +++++---
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1 file changed, 5 insertions(+), 3 deletions(-)
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--- a/drivers/i2c/busses/i2c-bcm2708.c
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+++ b/drivers/i2c/busses/i2c-bcm2708.c
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@@ -97,7 +97,7 @@ struct bcm2708_i2c {
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*
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* FIXME: This is a hack. Use pinmux / pinctrl.
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*/
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-static void bcm2708_i2c_init_pinmode(void)
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+static void bcm2708_i2c_init_pinmode(int id)
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{
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#define INP_GPIO(g) *(gpio+((g)/10)) &= ~(7<<(((g)%10)*3))
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#define SET_GPIO_ALT(g,a) *(gpio+(((g)/10))) |= (((a)<=3?(a)+4:(a)==4?3:2)<<(((g)%10)*3))
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@@ -105,8 +105,10 @@ static void bcm2708_i2c_init_pinmode(voi
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int pin;
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u32 *gpio = ioremap(0x20200000, SZ_16K);
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+ BUG_ON(id != 0 && id != 1);
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/* BSC0 is on GPIO 0 & 1, BSC1 is on GPIO 2 & 3 */
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- for (pin = 0; pin <= 3; pin++) {
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+ for (pin = id*2+0; pin <= id*2+1; pin++) {
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+printk("bcm2708_i2c_init_pinmode(%d,%d)\n", id, pin);
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INP_GPIO(pin); /* set mode to GPIO input first */
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SET_GPIO_ALT(pin, 0); /* set mode to ALT 0 */
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}
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@@ -279,7 +281,7 @@ static int bcm2708_i2c_probe(struct plat
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return PTR_ERR(clk);
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}
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- bcm2708_i2c_init_pinmode();
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+ bcm2708_i2c_init_pinmode(pdev->id);
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bi = kzalloc(sizeof(*bi), GFP_KERNEL);
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if (!bi)
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