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Date: Sun, 26 Jul 2020 00:34:53 +0530
From: Sekhar Nori <nsekhar@...com>
To: Kishon Vijay Abraham I <kishon@...com>,
Vinod Koul <vkoul@...nel.org>
CC: <linux-kernel@...r.kernel.org>, Sekhar Nori <nsekhar@...com>
Subject: [PATCH 1/3] phy: ti: am654: simplify regfield handling
regfield handling in current driver code is made complicated
by having a separate regfield variable for each field which
is allocated individually.
This quickly gets unwieldy once number of regfields increase.
Instead, use an array of regfields which are allocated in a
loop.
Signed-off-by: Sekhar Nori <nsekhar@...com>
---
drivers/phy/ti/phy-am654-serdes.c | 161 +++++++++++++-----------------
1 file changed, 69 insertions(+), 92 deletions(-)
diff --git a/drivers/phy/ti/phy-am654-serdes.c b/drivers/phy/ti/phy-am654-serdes.c
index 0a166d5a6414..ed7669c6a7a0 100644
--- a/drivers/phy/ti/phy-am654-serdes.c
+++ b/drivers/phy/ti/phy-am654-serdes.c
@@ -22,7 +22,7 @@
#define CMU_R07C 0x7c
#define COMLANE_R138 0xb38
-#define VERSION 0x70
+#define VERSION_VAL 0x70
#define COMLANE_R190 0xb90
@@ -80,27 +80,54 @@ static struct regmap_config serdes_am654_regmap_config = {
.max_register = 0x1ffc,
};
-static const struct reg_field cmu_master_cdn_o = REG_FIELD(CMU_R07C, 24, 24);
-static const struct reg_field config_version = REG_FIELD(COMLANE_R138, 16, 23);
-static const struct reg_field l1_master_cdn_o = REG_FIELD(COMLANE_R190, 9, 9);
-static const struct reg_field cmu_ok_i_0 = REG_FIELD(COMLANE_R194, 19, 19);
-static const struct reg_field por_en = REG_FIELD(SERDES_CTRL, 29, 29);
-static const struct reg_field tx0_enable = REG_FIELD(WIZ_LANEXCTL_STS, 29, 31);
-static const struct reg_field rx0_enable = REG_FIELD(WIZ_LANEXCTL_STS, 13, 15);
-static const struct reg_field pll_enable = REG_FIELD(WIZ_PLL_CTRL, 29, 31);
+enum serdes_am654_fields {
+ /* CMU Master Reset */
+ CMU_MASTER_CDN,
+ CONFIG_VERSION,
+
+ /* Lane 1 Master Reset */
+ L1_MASTER_CDN,
+
+ /* CMU OK Status */
+ CMU_OK_I_0,
+
+ /* Serdes reset */
+ POR_EN,
+
+ /* Tx Enable Value */
+ TX0_ENABLE,
+
+ /* Rx Enable Value */
+ RX0_ENABLE,
+
+ /* PLL Enable Value */
+ PLL_ENABLE,
+
+ /* PLL ready for use */
+ PLL_OK,
+
+ /* sentinel */
+ MAX_FIELDS
+
+};
+
+static const struct reg_field serdes_am654_reg_fields[] = {
+ [CMU_MASTER_CDN] = REG_FIELD(CMU_R07C, 24, 24),
+ [CONFIG_VERSION] = REG_FIELD(COMLANE_R138, 16, 23),
+ [L1_MASTER_CDN] = REG_FIELD(COMLANE_R190, 9, 9),
+ [CMU_OK_I_0] = REG_FIELD(COMLANE_R194, 19, 19),
+ [POR_EN] = REG_FIELD(SERDES_CTRL, 29, 29),
+ [TX0_ENABLE] = REG_FIELD(WIZ_LANEXCTL_STS, 29, 31),
+ [RX0_ENABLE] = REG_FIELD(WIZ_LANEXCTL_STS, 13, 15),
+ [PLL_ENABLE] = REG_FIELD(WIZ_PLL_CTRL, 29, 31),
+ [PLL_OK] = REG_FIELD(WIZ_PLL_CTRL, 28, 28),
+};
+
static const struct reg_field pll_ok = REG_FIELD(WIZ_PLL_CTRL, 28, 28);
struct serdes_am654 {
struct regmap *regmap;
- struct regmap_field *cmu_master_cdn_o;
- struct regmap_field *config_version;
- struct regmap_field *l1_master_cdn_o;
- struct regmap_field *cmu_ok_i_0;
- struct regmap_field *por_en;
- struct regmap_field *tx0_enable;
- struct regmap_field *rx0_enable;
- struct regmap_field *pll_enable;
- struct regmap_field *pll_ok;
+ struct regmap_field *fields[MAX_FIELDS];
struct device *dev;
struct mux_control *control;
@@ -116,12 +143,12 @@ static int serdes_am654_enable_pll(struct serdes_am654 *phy)
int ret;
u32 val;
- ret = regmap_field_write(phy->pll_enable, PLL_ENABLE_STATE);
+ ret = regmap_field_write(phy->fields[PLL_ENABLE], PLL_ENABLE_STATE);
if (ret)
return ret;
- return regmap_field_read_poll_timeout(phy->pll_ok, val, val, 1000,
- PLL_LOCK_TIME);
+ return regmap_field_read_poll_timeout(phy->fields[PLL_OK], val, val,
+ 1000, PLL_LOCK_TIME);
}
static void serdes_am654_disable_pll(struct serdes_am654 *phy)
@@ -129,7 +156,7 @@ static void serdes_am654_disable_pll(struct serdes_am654 *phy)
struct device *dev = phy->dev;
int ret;
- ret = regmap_field_write(phy->pll_enable, PLL_DISABLE_STATE);
+ ret = regmap_field_write(phy->fields[PLL_ENABLE], PLL_DISABLE_STATE);
if (ret)
dev_err(dev, "Failed to disable PLL\n");
}
@@ -139,12 +166,12 @@ static int serdes_am654_enable_txrx(struct serdes_am654 *phy)
int ret;
/* Enable TX */
- ret = regmap_field_write(phy->tx0_enable, TX0_ENABLE_STATE);
+ ret = regmap_field_write(phy->fields[TX0_ENABLE], TX0_ENABLE_STATE);
if (ret)
return ret;
/* Enable RX */
- ret = regmap_field_write(phy->rx0_enable, RX0_ENABLE_STATE);
+ ret = regmap_field_write(phy->fields[RX0_ENABLE], RX0_ENABLE_STATE);
if (ret)
return ret;
@@ -156,12 +183,12 @@ static int serdes_am654_disable_txrx(struct serdes_am654 *phy)
int ret;
/* Disable TX */
- ret = regmap_field_write(phy->tx0_enable, TX0_DISABLE_STATE);
+ ret = regmap_field_write(phy->fields[TX0_ENABLE], TX0_DISABLE_STATE);
if (ret)
return ret;
/* Disable RX */
- ret = regmap_field_write(phy->rx0_enable, RX0_DISABLE_STATE);
+ ret = regmap_field_write(phy->fields[RX0_ENABLE], RX0_DISABLE_STATE);
if (ret)
return ret;
@@ -187,8 +214,8 @@ static int serdes_am654_power_on(struct phy *x)
return ret;
}
- return regmap_field_read_poll_timeout(phy->cmu_ok_i_0, val, val,
- SLEEP_TIME, PLL_LOCK_TIME);
+ return regmap_field_read_poll_timeout(phy->fields[CMU_OK_I_0], val,
+ val, SLEEP_TIME, PLL_LOCK_TIME);
}
static int serdes_am654_power_off(struct phy *x)
@@ -288,15 +315,15 @@ static int serdes_am654_pcie_init(struct serdes_am654 *phy)
{
int ret;
- ret = regmap_field_write(phy->config_version, VERSION);
+ ret = regmap_field_write(phy->fields[CONFIG_VERSION], VERSION_VAL);
if (ret)
return ret;
- ret = regmap_field_write(phy->cmu_master_cdn_o, 0x1);
+ ret = regmap_field_write(phy->fields[CMU_MASTER_CDN], 0x1);
if (ret)
return ret;
- ret = regmap_field_write(phy->l1_master_cdn_o, 0x1);
+ ret = regmap_field_write(phy->fields[L1_MASTER_CDN], 0x1);
if (ret)
return ret;
@@ -325,13 +352,13 @@ static int serdes_am654_reset(struct phy *x)
serdes_am654_disable_pll(phy);
serdes_am654_disable_txrx(phy);
- ret = regmap_field_write(phy->por_en, 0x1);
+ ret = regmap_field_write(phy->fields[POR_EN], 0x1);
if (ret)
return ret;
mdelay(1);
- ret = regmap_field_write(phy->por_en, 0x0);
+ ret = regmap_field_write(phy->fields[POR_EN], 0x0);
if (ret)
return ret;
@@ -587,66 +614,16 @@ static int serdes_am654_regfield_init(struct serdes_am654 *am654_phy)
{
struct regmap *regmap = am654_phy->regmap;
struct device *dev = am654_phy->dev;
+ int i;
- am654_phy->cmu_master_cdn_o = devm_regmap_field_alloc(dev, regmap,
- cmu_master_cdn_o);
- if (IS_ERR(am654_phy->cmu_master_cdn_o)) {
- dev_err(dev, "CMU_MASTER_CDN_O reg field init failed\n");
- return PTR_ERR(am654_phy->cmu_master_cdn_o);
- }
-
- am654_phy->config_version = devm_regmap_field_alloc(dev, regmap,
- config_version);
- if (IS_ERR(am654_phy->config_version)) {
- dev_err(dev, "CONFIG_VERSION reg field init failed\n");
- return PTR_ERR(am654_phy->config_version);
- }
-
- am654_phy->l1_master_cdn_o = devm_regmap_field_alloc(dev, regmap,
- l1_master_cdn_o);
- if (IS_ERR(am654_phy->l1_master_cdn_o)) {
- dev_err(dev, "L1_MASTER_CDN_O reg field init failed\n");
- return PTR_ERR(am654_phy->l1_master_cdn_o);
- }
-
- am654_phy->cmu_ok_i_0 = devm_regmap_field_alloc(dev, regmap,
- cmu_ok_i_0);
- if (IS_ERR(am654_phy->cmu_ok_i_0)) {
- dev_err(dev, "CMU_OK_I_0 reg field init failed\n");
- return PTR_ERR(am654_phy->cmu_ok_i_0);
- }
-
- am654_phy->por_en = devm_regmap_field_alloc(dev, regmap, por_en);
- if (IS_ERR(am654_phy->por_en)) {
- dev_err(dev, "POR_EN reg field init failed\n");
- return PTR_ERR(am654_phy->por_en);
- }
-
- am654_phy->tx0_enable = devm_regmap_field_alloc(dev, regmap,
- tx0_enable);
- if (IS_ERR(am654_phy->tx0_enable)) {
- dev_err(dev, "TX0_ENABLE reg field init failed\n");
- return PTR_ERR(am654_phy->tx0_enable);
- }
-
- am654_phy->rx0_enable = devm_regmap_field_alloc(dev, regmap,
- rx0_enable);
- if (IS_ERR(am654_phy->rx0_enable)) {
- dev_err(dev, "RX0_ENABLE reg field init failed\n");
- return PTR_ERR(am654_phy->rx0_enable);
- }
-
- am654_phy->pll_enable = devm_regmap_field_alloc(dev, regmap,
- pll_enable);
- if (IS_ERR(am654_phy->pll_enable)) {
- dev_err(dev, "PLL_ENABLE reg field init failed\n");
- return PTR_ERR(am654_phy->pll_enable);
- }
-
- am654_phy->pll_ok = devm_regmap_field_alloc(dev, regmap, pll_ok);
- if (IS_ERR(am654_phy->pll_ok)) {
- dev_err(dev, "PLL_OK reg field init failed\n");
- return PTR_ERR(am654_phy->pll_ok);
+ for (i = 0; i < MAX_FIELDS; i++) {
+ am654_phy->fields[i] = devm_regmap_field_alloc(dev,
+ regmap,
+ serdes_am654_reg_fields[i]);
+ if (IS_ERR(am654_phy->fields[i])) {
+ dev_err(dev, "Unable to allocate regmap field %d\n", i);
+ return PTR_ERR(am654_phy->fields[i]);
+ }
}
return 0;
--
2.17.1
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