| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <assert.h> |
| #include <console/console.h> |
| #include <device/device.h> |
| #include <device/smbus.h> |
| #include "chip.h" |
| |
| #define SMBUS_BLOCK_SIZE 32 |
| |
| static void ck505_init(struct device *dev) |
| { |
| struct drivers_i2c_ck505_config *config; |
| int dev_nregs, nregs; |
| u8 block[SMBUS_BLOCK_SIZE]; |
| int i; |
| |
| if (!dev->enabled || dev->path.type != DEVICE_PATH_I2C) |
| return; |
| |
| config = dev->chip_info; |
| |
| dev_nregs = smbus_block_read(dev, 0, sizeof(block), block); |
| |
| if (dev_nregs < 0) { |
| printk(BIOS_ERR, "Failed reading ck505 configuration!\n"); |
| return; |
| } |
| |
| /* This means that the devicetree doesn't have to specify nregs */ |
| nregs = MIN(MIN(dev_nregs, config->nregs == 0 ? SMBUS_BLOCK_SIZE |
| : config->nregs), ARRAY_SIZE(config->mask)); |
| |
| printk(BIOS_DEBUG, "Changing %d of the %d ck505 config bytes.\n", |
| nregs, dev_nregs); |
| |
| assert(ARRAY_SIZE(config->mask) == ARRAY_SIZE(config->regs)); |
| |
| for (i = 0; i < nregs && i < SMBUS_BLOCK_SIZE; i++) |
| block[i] = (block[i] & ~config->mask[i]) | config->regs[i]; |
| |
| if (smbus_block_write(dev, 0, dev_nregs, block) < 0) |
| printk(BIOS_ERR, "Failed writing ck505 configuration!\n"); |
| } |
| |
| static struct device_operations ck505_operations = { |
| .read_resources = noop_read_resources, |
| .set_resources = noop_set_resources, |
| .init = ck505_init, |
| }; |
| |
| static void enable_dev(struct device *dev) |
| { |
| dev->ops = &ck505_operations; |
| } |
| |
| struct chip_operations drivers_i2c_ck505_ops = { |
| .name = "CK505 Clock generator", |
| .enable_dev = enable_dev, |
| }; |