mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 12:43:55 +08:00
ARM SCPI updates/cleanups for v4.15
1. Fixes to get rid of sparse warnings 2. Use of FIELD_GET and GENMASK for better subfields handling 3. Make mbox_free_channels device-managed helping in removing unnecessary code 4. Various other cleanups to simplify and improve code readability -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABCAAGBQJZ23nZAAoJEABBurwxfuKY0P4QALsPA3LlPBMewuHXJgNEiybd yTSTquucp//AEBPwW6VKqPnE6rNTFgd2hID8yqxczX/vPKmsPpG8L2MPzHgU2Z/z ffGh911nb/PjV5R2PLaJdT2u16YUXa6wq6OvO7eKyOXuLOsi/LI764uscgXo/t1I zC4ywG0E5MIt2l/CdgqQU4U7ZxCjZV8mTK/wnJ6N4FOGT8iz4LWOc55gofeDscqJ U3Kr4xDxxfUutxeaBWAM939i0qtVvXnoaVFM0Hi617CNNZxRm6/ihqL3f5gEjhiO tUa3KYRrXdRlSrnZVoUzdeT50QxDKWmhaLyt1W9WGKeXDRBJozuqs25ASKHCbDto pjvK0ZJXFr5xG7LSjglFC8LgvvgQaYD9Xxd2wP8jhJZC5SdnxV50vugfTkFrADGN aqV13BC2fCzeKUSV3GnfctXlX8UKoElUbKp/MGlhMso3/msd2tc8ojBh/mxUKNFO L5docrK3GV3VXhb+47p9n6b24K/wmM18czSj83YDs8O3svZ/7xctYNwpjEO6WPBo JJcKZIMLEgc2blhk80fAa3E/PyFcXeKF+e8xUGUfZSNuOZqCqA/zWTvyQ7Id/QK+ L6BuxwPoAHyf+SHz5SR3ytqYDLGL7YdIWklvyNXccYLyV00dz/VWtf9monIcx8WQ SX8D9M88wgWwXWXXD3LH =zIHJ -----END PGP SIGNATURE----- Merge tag 'scpi-updates-4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux into next/drivers Pull "ARM SCPI updates/cleanups for v4.15" from Sudeep Holla: 1. Fixes to get rid of sparse warnings 2. Use of FIELD_GET and GENMASK for better subfields handling 3. Make mbox_free_channels device-managed helping in removing unnecessary code 4. Various other cleanups to simplify and improve code readability * tag 'scpi-updates-4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux: firmware: arm_scpi: silence sparse warnings firmware: arm_scpi: remove all single element structures firmware: arm_scpi: drop unnecessary type cast to scpi_shared_mem firmware: arm_scpi: improve struct sensor_value firmware: arm_scpi: improve handling of protocol and firmware version subfields firmware: arm_scpi: improve struct dvfs_info to make code better readable firmware: arm_scpi: remove scpi_remove firmware: arm_scpi: make freeing mbox channels device-managed firmware: arm_scpi: pre-populate dvfs info in scpi_probe firmware: arm_scpi: remove two unneeded devm_kfree's in scpi_remove firmware: arm_scpi: remove usage of drvdata and don't reset scpi_info to null
This commit is contained in:
Arnd Bergmann
commit
6710acf259
@ -28,6 +28,7 @@
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/bitmap.h>
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#include <linux/bitfield.h>
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/export.h>
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@ -72,21 +73,13 @@
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#define MAX_DVFS_DOMAINS 8
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#define MAX_DVFS_OPPS 16
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#define DVFS_LATENCY(hdr) (le32_to_cpu(hdr) >> 16)
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#define DVFS_OPP_COUNT(hdr) ((le32_to_cpu(hdr) >> 8) & 0xff)
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#define PROTOCOL_REV_MINOR_BITS 16
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#define PROTOCOL_REV_MINOR_MASK ((1U << PROTOCOL_REV_MINOR_BITS) - 1)
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#define PROTOCOL_REV_MAJOR(x) ((x) >> PROTOCOL_REV_MINOR_BITS)
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#define PROTOCOL_REV_MINOR(x) ((x) & PROTOCOL_REV_MINOR_MASK)
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#define PROTO_REV_MAJOR_MASK GENMASK(31, 16)
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#define PROTO_REV_MINOR_MASK GENMASK(15, 0)
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#define FW_REV_MAJOR_BITS 24
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#define FW_REV_MINOR_BITS 16
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#define FW_REV_PATCH_MASK ((1U << FW_REV_MINOR_BITS) - 1)
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#define FW_REV_MINOR_MASK ((1U << FW_REV_MAJOR_BITS) - 1)
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#define FW_REV_MAJOR(x) ((x) >> FW_REV_MAJOR_BITS)
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#define FW_REV_MINOR(x) (((x) & FW_REV_MINOR_MASK) >> FW_REV_MINOR_BITS)
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#define FW_REV_PATCH(x) ((x) & FW_REV_PATCH_MASK)
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#define FW_REV_MAJOR_MASK GENMASK(31, 24)
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#define FW_REV_MINOR_MASK GENMASK(23, 16)
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#define FW_REV_PATCH_MASK GENMASK(15, 0)
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#define MAX_RX_TIMEOUT (msecs_to_jiffies(30))
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@ -311,10 +304,6 @@ struct clk_get_info {
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u8 name[20];
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} __packed;
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struct clk_get_value {
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__le32 rate;
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} __packed;
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struct clk_set_value {
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__le16 id;
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__le16 reserved;
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@ -328,7 +317,9 @@ struct legacy_clk_set_value {
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} __packed;
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struct dvfs_info {
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__le32 header;
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u8 domain;
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u8 opp_count;
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__le16 latency;
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struct {
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__le32 freq;
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__le32 m_volt;
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@ -351,11 +342,6 @@ struct _scpi_sensor_info {
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char name[20];
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};
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struct sensor_value {
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__le32 lo_val;
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__le32 hi_val;
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} __packed;
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struct dev_pstate_set {
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__le16 dev_id;
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u8 pstate;
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@ -419,19 +405,20 @@ static void scpi_process_cmd(struct scpi_chan *ch, u32 cmd)
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unsigned int len;
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if (scpi_info->is_legacy) {
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struct legacy_scpi_shared_mem *mem = ch->rx_payload;
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struct legacy_scpi_shared_mem __iomem *mem =
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ch->rx_payload;
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/* RX Length is not replied by the legacy Firmware */
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len = match->rx_len;
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match->status = le32_to_cpu(mem->status);
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match->status = ioread32(&mem->status);
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memcpy_fromio(match->rx_buf, mem->payload, len);
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} else {
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struct scpi_shared_mem *mem = ch->rx_payload;
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struct scpi_shared_mem __iomem *mem = ch->rx_payload;
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len = min(match->rx_len, CMD_SIZE(cmd));
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match->status = le32_to_cpu(mem->status);
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match->status = ioread32(&mem->status);
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memcpy_fromio(match->rx_buf, mem->payload, len);
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}
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@ -445,11 +432,11 @@ static void scpi_process_cmd(struct scpi_chan *ch, u32 cmd)
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static void scpi_handle_remote_msg(struct mbox_client *c, void *msg)
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{
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struct scpi_chan *ch = container_of(c, struct scpi_chan, cl);
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struct scpi_shared_mem *mem = ch->rx_payload;
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struct scpi_shared_mem __iomem *mem = ch->rx_payload;
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u32 cmd = 0;
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if (!scpi_info->is_legacy)
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cmd = le32_to_cpu(mem->command);
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cmd = ioread32(&mem->command);
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scpi_process_cmd(ch, cmd);
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}
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@ -459,7 +446,7 @@ static void scpi_tx_prepare(struct mbox_client *c, void *msg)
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unsigned long flags;
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struct scpi_xfer *t = msg;
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struct scpi_chan *ch = container_of(c, struct scpi_chan, cl);
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struct scpi_shared_mem *mem = (struct scpi_shared_mem *)ch->tx_payload;
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struct scpi_shared_mem __iomem *mem = ch->tx_payload;
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if (t->tx_buf) {
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if (scpi_info->is_legacy)
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@ -478,7 +465,7 @@ static void scpi_tx_prepare(struct mbox_client *c, void *msg)
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}
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if (!scpi_info->is_legacy)
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mem->command = cpu_to_le32(t->cmd);
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iowrite32(t->cmd, &mem->command);
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}
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static struct scpi_xfer *get_scpi_xfer(struct scpi_chan *ch)
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@ -583,13 +570,13 @@ scpi_clk_get_range(u16 clk_id, unsigned long *min, unsigned long *max)
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static unsigned long scpi_clk_get_val(u16 clk_id)
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{
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int ret;
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struct clk_get_value clk;
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__le32 rate;
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__le16 le_clk_id = cpu_to_le16(clk_id);
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ret = scpi_send_message(CMD_GET_CLOCK_VALUE, &le_clk_id,
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sizeof(le_clk_id), &clk, sizeof(clk));
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sizeof(le_clk_id), &rate, sizeof(rate));
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return ret ? ret : le32_to_cpu(clk.rate);
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return ret ? ret : le32_to_cpu(rate);
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}
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static int scpi_clk_set_val(u16 clk_id, unsigned long rate)
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@ -644,35 +631,35 @@ static int opp_cmp_func(const void *opp1, const void *opp2)
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}
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static struct scpi_dvfs_info *scpi_dvfs_get_info(u8 domain)
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{
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if (domain >= MAX_DVFS_DOMAINS)
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return ERR_PTR(-EINVAL);
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return scpi_info->dvfs[domain] ?: ERR_PTR(-EINVAL);
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}
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static int scpi_dvfs_populate_info(struct device *dev, u8 domain)
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{
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struct scpi_dvfs_info *info;
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struct scpi_opp *opp;
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struct dvfs_info buf;
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int ret, i;
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if (domain >= MAX_DVFS_DOMAINS)
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return ERR_PTR(-EINVAL);
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if (scpi_info->dvfs[domain]) /* data already populated */
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return scpi_info->dvfs[domain];
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ret = scpi_send_message(CMD_GET_DVFS_INFO, &domain, sizeof(domain),
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&buf, sizeof(buf));
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if (ret)
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return ERR_PTR(ret);
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return ret;
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info = kmalloc(sizeof(*info), GFP_KERNEL);
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info = devm_kmalloc(dev, sizeof(*info), GFP_KERNEL);
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if (!info)
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return ERR_PTR(-ENOMEM);
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return -ENOMEM;
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info->count = DVFS_OPP_COUNT(buf.header);
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info->latency = DVFS_LATENCY(buf.header) * 1000; /* uS to nS */
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info->count = buf.opp_count;
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info->latency = le16_to_cpu(buf.latency) * 1000; /* uS to nS */
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info->opps = kcalloc(info->count, sizeof(*opp), GFP_KERNEL);
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if (!info->opps) {
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kfree(info);
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return ERR_PTR(-ENOMEM);
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}
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info->opps = devm_kcalloc(dev, info->count, sizeof(*opp), GFP_KERNEL);
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if (!info->opps)
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return -ENOMEM;
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for (i = 0, opp = info->opps; i < info->count; i++, opp++) {
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opp->freq = le32_to_cpu(buf.opps[i].freq);
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@ -682,7 +669,15 @@ static struct scpi_dvfs_info *scpi_dvfs_get_info(u8 domain)
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sort(info->opps, info->count, sizeof(*opp), opp_cmp_func, NULL);
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scpi_info->dvfs[domain] = info;
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return info;
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return 0;
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}
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static void scpi_dvfs_populate(struct device *dev)
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{
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int domain;
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for (domain = 0; domain < MAX_DVFS_DOMAINS; domain++)
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scpi_dvfs_populate_info(dev, domain);
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}
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static int scpi_dev_domain_id(struct device *dev)
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@ -713,9 +708,6 @@ static int scpi_dvfs_get_transition_latency(struct device *dev)
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if (IS_ERR(info))
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return PTR_ERR(info);
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if (!info->latency)
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return 0;
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return info->latency;
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}
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@ -776,20 +768,19 @@ static int scpi_sensor_get_info(u16 sensor_id, struct scpi_sensor_info *info)
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static int scpi_sensor_get_value(u16 sensor, u64 *val)
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{
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__le16 id = cpu_to_le16(sensor);
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struct sensor_value buf;
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__le64 value;
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int ret;
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ret = scpi_send_message(CMD_SENSOR_VALUE, &id, sizeof(id),
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&buf, sizeof(buf));
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&value, sizeof(value));
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if (ret)
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return ret;
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if (scpi_info->is_legacy)
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/* only 32-bits supported, hi_val can be junk */
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*val = le32_to_cpu(buf.lo_val);
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/* only 32-bits supported, upper 32 bits can be junk */
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*val = le32_to_cpup((__le32 *)&value);
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else
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*val = (u64)le32_to_cpu(buf.hi_val) << 32 |
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le32_to_cpu(buf.lo_val);
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*val = le64_to_cpu(value);
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return 0;
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}
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@ -862,23 +853,19 @@ static int scpi_init_versions(struct scpi_drvinfo *info)
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static ssize_t protocol_version_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct scpi_drvinfo *scpi_info = dev_get_drvdata(dev);
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return sprintf(buf, "%d.%d\n",
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PROTOCOL_REV_MAJOR(scpi_info->protocol_version),
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PROTOCOL_REV_MINOR(scpi_info->protocol_version));
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return sprintf(buf, "%lu.%lu\n",
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FIELD_GET(PROTO_REV_MAJOR_MASK, scpi_info->protocol_version),
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FIELD_GET(PROTO_REV_MINOR_MASK, scpi_info->protocol_version));
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}
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static DEVICE_ATTR_RO(protocol_version);
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static ssize_t firmware_version_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct scpi_drvinfo *scpi_info = dev_get_drvdata(dev);
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return sprintf(buf, "%d.%d.%d\n",
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FW_REV_MAJOR(scpi_info->firmware_version),
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FW_REV_MINOR(scpi_info->firmware_version),
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FW_REV_PATCH(scpi_info->firmware_version));
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return sprintf(buf, "%lu.%lu.%lu\n",
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FIELD_GET(FW_REV_MAJOR_MASK, scpi_info->firmware_version),
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FIELD_GET(FW_REV_MINOR_MASK, scpi_info->firmware_version),
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FIELD_GET(FW_REV_PATCH_MASK, scpi_info->firmware_version));
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}
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static DEVICE_ATTR_RO(firmware_version);
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@ -889,39 +876,13 @@ static struct attribute *versions_attrs[] = {
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};
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ATTRIBUTE_GROUPS(versions);
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static void
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scpi_free_channels(struct device *dev, struct scpi_chan *pchan, int count)
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static void scpi_free_channels(void *data)
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{
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struct scpi_drvinfo *info = data;
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int i;
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for (i = 0; i < count && pchan->chan; i++, pchan++) {
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mbox_free_channel(pchan->chan);
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devm_kfree(dev, pchan->xfers);
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devm_iounmap(dev, pchan->rx_payload);
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}
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}
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static int scpi_remove(struct platform_device *pdev)
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{
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int i;
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struct device *dev = &pdev->dev;
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struct scpi_drvinfo *info = platform_get_drvdata(pdev);
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scpi_info = NULL; /* stop exporting SCPI ops through get_scpi_ops */
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of_platform_depopulate(dev);
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sysfs_remove_groups(&dev->kobj, versions_groups);
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scpi_free_channels(dev, info->channels, info->num_chans);
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platform_set_drvdata(pdev, NULL);
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for (i = 0; i < MAX_DVFS_DOMAINS && info->dvfs[i]; i++) {
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kfree(info->dvfs[i]->opps);
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kfree(info->dvfs[i]);
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}
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devm_kfree(dev, info->channels);
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devm_kfree(dev, info);
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return 0;
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for (i = 0; i < info->num_chans; i++)
|
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mbox_free_channel(info->channels[i].chan);
|
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}
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#define MAX_SCPI_XFERS 10
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@ -952,7 +913,6 @@ static int scpi_probe(struct platform_device *pdev)
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{
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int count, idx, ret;
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struct resource res;
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struct scpi_chan *scpi_chan;
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struct device *dev = &pdev->dev;
|
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struct device_node *np = dev->of_node;
|
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@ -969,13 +929,19 @@ static int scpi_probe(struct platform_device *pdev)
|
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return -ENODEV;
|
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}
|
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|
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scpi_chan = devm_kcalloc(dev, count, sizeof(*scpi_chan), GFP_KERNEL);
|
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if (!scpi_chan)
|
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scpi_info->channels = devm_kcalloc(dev, count, sizeof(struct scpi_chan),
|
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GFP_KERNEL);
|
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if (!scpi_info->channels)
|
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return -ENOMEM;
|
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|
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for (idx = 0; idx < count; idx++) {
|
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ret = devm_add_action(dev, scpi_free_channels, scpi_info);
|
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if (ret)
|
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return ret;
|
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|
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for (; scpi_info->num_chans < count; scpi_info->num_chans++) {
|
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resource_size_t size;
|
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struct scpi_chan *pchan = scpi_chan + idx;
|
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int idx = scpi_info->num_chans;
|
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struct scpi_chan *pchan = scpi_info->channels + idx;
|
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struct mbox_client *cl = &pchan->cl;
|
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struct device_node *shmem = of_parse_phandle(np, "shmem", idx);
|
||||
|
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@ -983,15 +949,14 @@ static int scpi_probe(struct platform_device *pdev)
|
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of_node_put(shmem);
|
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if (ret) {
|
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dev_err(dev, "failed to get SCPI payload mem resource\n");
|
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goto err;
|
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return ret;
|
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}
|
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|
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size = resource_size(&res);
|
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pchan->rx_payload = devm_ioremap(dev, res.start, size);
|
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if (!pchan->rx_payload) {
|
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dev_err(dev, "failed to ioremap SCPI payload\n");
|
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ret = -EADDRNOTAVAIL;
|
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goto err;
|
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return -EADDRNOTAVAIL;
|
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}
|
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pchan->tx_payload = pchan->rx_payload + (size >> 1);
|
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|
||||
@ -1017,17 +982,11 @@ static int scpi_probe(struct platform_device *pdev)
|
||||
dev_err(dev, "failed to get channel%d err %d\n",
|
||||
idx, ret);
|
||||
}
|
||||
err:
|
||||
scpi_free_channels(dev, scpi_chan, idx);
|
||||
scpi_info = NULL;
|
||||
return ret;
|
||||
}
|
||||
|
||||
scpi_info->channels = scpi_chan;
|
||||
scpi_info->num_chans = count;
|
||||
scpi_info->commands = scpi_std_commands;
|
||||
|
||||
platform_set_drvdata(pdev, scpi_info);
|
||||
scpi_info->scpi_ops = &scpi_ops;
|
||||
|
||||
if (scpi_info->is_legacy) {
|
||||
/* Replace with legacy variants */
|
||||
@ -1043,23 +1002,23 @@ err:
|
||||
ret = scpi_init_versions(scpi_info);
|
||||
if (ret) {
|
||||
dev_err(dev, "incorrect or no SCP firmware found\n");
|
||||
scpi_remove(pdev);
|
||||
return ret;
|
||||
}
|
||||
|
||||
_dev_info(dev, "SCP Protocol %d.%d Firmware %d.%d.%d version\n",
|
||||
PROTOCOL_REV_MAJOR(scpi_info->protocol_version),
|
||||
PROTOCOL_REV_MINOR(scpi_info->protocol_version),
|
||||
FW_REV_MAJOR(scpi_info->firmware_version),
|
||||
FW_REV_MINOR(scpi_info->firmware_version),
|
||||
FW_REV_PATCH(scpi_info->firmware_version));
|
||||
scpi_info->scpi_ops = &scpi_ops;
|
||||
scpi_dvfs_populate(dev);
|
||||
|
||||
ret = sysfs_create_groups(&dev->kobj, versions_groups);
|
||||
_dev_info(dev, "SCP Protocol %lu.%lu Firmware %lu.%lu.%lu version\n",
|
||||
FIELD_GET(PROTO_REV_MAJOR_MASK, scpi_info->protocol_version),
|
||||
FIELD_GET(PROTO_REV_MINOR_MASK, scpi_info->protocol_version),
|
||||
FIELD_GET(FW_REV_MAJOR_MASK, scpi_info->firmware_version),
|
||||
FIELD_GET(FW_REV_MINOR_MASK, scpi_info->firmware_version),
|
||||
FIELD_GET(FW_REV_PATCH_MASK, scpi_info->firmware_version));
|
||||
|
||||
ret = devm_device_add_groups(dev, versions_groups);
|
||||
if (ret)
|
||||
dev_err(dev, "unable to create sysfs version group\n");
|
||||
|
||||
return of_platform_populate(dev->of_node, NULL, NULL, dev);
|
||||
return devm_of_platform_populate(dev);
|
||||
}
|
||||
|
||||
static const struct of_device_id scpi_of_match[] = {
|
||||
@ -1076,7 +1035,6 @@ static struct platform_driver scpi_driver = {
|
||||
.of_match_table = scpi_of_match,
|
||||
},
|
||||
.probe = scpi_probe,
|
||||
.remove = scpi_remove,
|
||||
};
|
||||
module_platform_driver(scpi_driver);
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user