e361ac9fa8
Change-Id: Ic525c92e73097752a7c690186dc2034785cac678 Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/25821 Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
77 lines
2.0 KiB
C
77 lines
2.0 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2011 Sven Schnelle <svens@stackframe.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; version 2 of
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* the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <assert.h>
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#include <console/console.h>
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#include <device/device.h>
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#include <device/smbus.h>
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#include "chip.h"
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#define SMBUS_BLOCK_SIZE 32
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static void ck505_init(struct device *dev)
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{
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struct drivers_i2c_ck505_config *config;
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int dev_nregs, nregs;
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u8 block[SMBUS_BLOCK_SIZE];
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int i;
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if (!dev->enabled || dev->path.type != DEVICE_PATH_I2C)
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return;
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config = dev->chip_info;
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dev_nregs = smbus_block_read(dev, 0, sizeof(block), block);
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if (dev_nregs < 0) {
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printk(BIOS_ERR, "Failed reading ck505 configuration!\n");
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return;
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}
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/* This means that the devicetree doesn't have to specify nregs */
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nregs = MIN(MIN(dev_nregs, config->nregs == 0 ? SMBUS_BLOCK_SIZE
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: config->nregs), ARRAY_SIZE(config->mask));
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printk(BIOS_DEBUG, "Changing %d of the %d ck505 config bytes.\n",
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nregs, dev_nregs);
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assert(ARRAY_SIZE(config->mask) == ARRAY_SIZE(config->regs));
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for (i = 0; i < nregs && i < SMBUS_BLOCK_SIZE; i++)
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block[i] = (block[i] & ~config->mask[i]) | config->regs[i];
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if (smbus_block_write(dev, 0, dev_nregs, block) < 0)
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printk(BIOS_ERR, "Failed writing ck505 configuration!\n");
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}
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static struct device_operations ck505_operations = {
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.read_resources = DEVICE_NOOP,
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.set_resources = DEVICE_NOOP,
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.enable_resources = DEVICE_NOOP,
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.init = ck505_init,
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};
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static void enable_dev(struct device *dev)
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{
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dev->ops = &ck505_operations;
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}
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struct chip_operations drivers_i2c_ck505_ops = {
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CHIP_NAME("CK505 Clock generator")
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.enable_dev = enable_dev,
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};
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