On Tue, Feb 07, 2023 at 04:25:24PM +0000, Lucas Tanure wrote:
Shared boost allows two amplifiers to share a single boost circuit by communicating on the MDSYNC bus. The passive amplifier does not control the boost and receives data from the active amplifier.
Shared Boost is not supported in HDA Systems. Based on David Rhodes shared boost patches.
Signed-off-by: Lucas Tanure lucas.tanure@collabora.com
-int cs35l41_global_enable(struct regmap *regmap, enum cs35l41_boost_type b_type, int enable) +int cs35l41_global_enable(struct regmap *regmap, enum cs35l41_boost_type b_type, int enable,
struct completion *pll_lock){ int ret;
unsigned int gpio1;
switch (b_type) {
case CS35L41_SHD_BOOST_ACTV:
case CS35L41_SHD_BOOST_PASS:
regmap_update_bits(regmap, CS35L41_PWR_CTRL3, CS35L41_SYNC_EN_MASK, 0);gpio1 = enable ? CS35L41_GPIO1_MDSYNC : CS35L41_GPIO1_HIZ;regmap_update_bits(regmap, CS35L41_GPIO_PAD_CONTROL, CS35L41_GPIO1_CTRL_MASK,gpio1 << CS35L41_GPIO1_CTRL_SHIFT);ret = regmap_update_bits(regmap, CS35L41_PWR_CTRL1, CS35L41_GLOBAL_EN_MASK,enable << CS35L41_GLOBAL_EN_SHIFT);usleep_range(3000, 3100);if (!enable)break;if (!pll_lock)return -EINVAL;ret = wait_for_completion_timeout(pll_lock, msecs_to_jiffies(1000));if (ret == 0) {ret = -ETIMEDOUT;} else {regmap_update_bits(regmap, CS35L41_PWR_CTRL3, CS35L41_SYNC_EN_MASK, 0);regmap_update_bits(regmap, CS35L41_PWR_CTRL1, CS35L41_GLOBAL_EN_MASK,0 << CS35L41_GLOBAL_EN_SHIFT);usleep_range(3000, 3100);regmap_update_bits(regmap, CS35L41_PWR_CTRL1, CS35L41_GLOBAL_EN_MASK,1 << CS35L41_GLOBAL_EN_SHIFT);usleep_range(3000, 3100);}
This approach also makes me nervous, I was somewhat imagining the usage of regmap_multi_reg_write for this sequence was because it was very important that no other register writes could interleave in between these writes. But I don't know, so it could also have just been a random design choice. So we probably need David to confirm if that was the reason for the original code here.
Thanks, Charles