/* 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, };