[PATCH v2 10/11] drm/msm/dsi_phy_10nm: Replace parent names with clk_hw pointers

Marijn Suijten
2022-06-01T22:08:22Z

parent_hw pointers are easier to manage and cheaper to use than
repeatedly formatting the parent name and subsequently leaving the clk
framework to perform lookups based on that name.

Signed-off-by: Marijn Suijten <marijn.suijten@somainline.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
drivers/gpu/drm/msm/dsi/phy/dsi_phy_10nm.c | 79 ++++++++++------------
1 file changed, 36 insertions(+), 43 deletions(-)

diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_10nm.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_10nm.c
index 8bd7b97b1b9b..ae57f95edf63 100644
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_10nm.c
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_10nm.c
@@ -574,24 +574,24 @@ static int dsi_10nm_set_usecase(struct msm_dsi_phy *phy)
*/
static int pll_10nm_register(struct dsi_pll_10nm *pll_10nm, struct clk_hw **provided_clocks)
{
- char clk_name[32], parent[32], vco_name[32];
- char parent2[32], parent3[32], parent4[32];
+ char clk_name[32];
struct clk_init_data vco_init = {
.parent_data = &(const struct clk_parent_data) {
.fw_name = "ref",
},
.num_parents = 1,
- .name = vco_name,
+ .name = clk_name,
.flags = CLK_IGNORE_UNUSED,
.ops = &clk_ops_dsi_pll_10nm_vco,
};
struct device *dev = &pll_10nm->phy->pdev->dev;
- struct clk_hw *hw;
+ struct clk_hw *hw, *pll_out_div, *pll_bit, *pll_by_2_bit;
+ struct clk_hw *pll_post_out_div, *pclk_mux;
int ret;

DBG("DSI%d", pll_10nm->phy->id);

- snprintf(vco_name, sizeof(vco_name), "dsi%dvco_clk", pll_10nm->phy->id);
+ snprintf(clk_name, sizeof(clk_name), "dsi%dvco_clk", pll_10nm->phy->id);
pll_10nm->clk_hw.init = &vco_init;

ret = devm_clk_hw_register(dev, &pll_10nm->clk_hw);
@@ -599,36 +599,34 @@ static int pll_10nm_register(struct dsi_pll_10nm *pll_10nm, struct clk_hw **prov
return ret;

snprintf(clk_name, sizeof(clk_name), "dsi%d_pll_out_div_clk", pll_10nm->phy->id);
- snprintf(parent, sizeof(parent), "dsi%dvco_clk", pll_10nm->phy->id);

- hw = devm_clk_hw_register_divider(dev, clk_name, parent,
- CLK_SET_RATE_PARENT, pll_10nm->phy->pll_base +
+ pll_out_div = devm_clk_hw_register_divider_parent_hw(dev, clk_name,
+ &pll_10nm->clk_hw, CLK_SET_RATE_PARENT,
+ pll_10nm->phy->pll_base +
REG_DSI_10nm_PHY_PLL_PLL_OUTDIV_RATE,
0, 2, CLK_DIVIDER_POWER_OF_TWO, NULL);
- if (IS_ERR(hw)) {
- ret = PTR_ERR(hw);
+ if (IS_ERR(pll_out_div)) {
+ ret = PTR_ERR(pll_out_div);
goto fail;
}

snprintf(clk_name, sizeof(clk_name), "dsi%d_pll_bit_clk", pll_10nm->phy->id);
- snprintf(parent, sizeof(parent), "dsi%d_pll_out_div_clk", pll_10nm->phy->id);

/* BIT CLK: DIV_CTRL_3_0 */
- hw = devm_clk_hw_register_divider(dev, clk_name, parent,
- CLK_SET_RATE_PARENT,
+ pll_bit = devm_clk_hw_register_divider_parent_hw(dev, clk_name,
+ pll_out_div, CLK_SET_RATE_PARENT,
pll_10nm->phy->base + REG_DSI_10nm_PHY_CMN_CLK_CFG0,
0, 4, CLK_DIVIDER_ONE_BASED, &pll_10nm->postdiv_lock);
- if (IS_ERR(hw)) {
- ret = PTR_ERR(hw);
+ if (IS_ERR(pll_bit)) {
+ ret = PTR_ERR(pll_bit);
goto fail;
}

snprintf(clk_name, sizeof(clk_name), "dsi%d_phy_pll_out_byteclk", pll_10nm->phy->id);
- snprintf(parent, sizeof(parent), "dsi%d_pll_bit_clk", pll_10nm->phy->id);

/* DSI Byte clock = VCO_CLK / OUT_DIV / BIT_DIV / 8 */
- hw = devm_clk_hw_register_fixed_factor(dev, clk_name, parent,
- CLK_SET_RATE_PARENT, 1, 8);
+ hw = devm_clk_hw_register_fixed_factor_parent_hw(dev, clk_name,
+ pll_bit, CLK_SET_RATE_PARENT, 1, 8);
if (IS_ERR(hw)) {
ret = PTR_ERR(hw);
goto fail;
@@ -637,48 +635,43 @@ static int pll_10nm_register(struct dsi_pll_10nm *pll_10nm, struct clk_hw **prov
provided_clocks[DSI_BYTE_PLL_CLK] = hw;

snprintf(clk_name, sizeof(clk_name), "dsi%d_pll_by_2_bit_clk", pll_10nm->phy->id);
- snprintf(parent, sizeof(parent), "dsi%d_pll_bit_clk", pll_10nm->phy->id);

- hw = devm_clk_hw_register_fixed_factor(dev, clk_name, parent,
- 0, 1, 2);
- if (IS_ERR(hw)) {
- ret = PTR_ERR(hw);
+ pll_by_2_bit = devm_clk_hw_register_fixed_factor_parent_hw(dev,
+ clk_name, pll_bit, 0, 1, 2);
+ if (IS_ERR(pll_by_2_bit)) {
+ ret = PTR_ERR(pll_by_2_bit);
goto fail;
}

snprintf(clk_name, sizeof(clk_name), "dsi%d_pll_post_out_div_clk", pll_10nm->phy->id);
- snprintf(parent, sizeof(parent), "dsi%d_pll_out_div_clk", pll_10nm->phy->id);

- hw = devm_clk_hw_register_fixed_factor(dev, clk_name, parent,
- 0, 1, 4);
- if (IS_ERR(hw)) {
- ret = PTR_ERR(hw);
+ pll_post_out_div = devm_clk_hw_register_fixed_factor_parent_hw(dev,
+ clk_name, pll_out_div, 0, 1, 4);
+ if (IS_ERR(pll_post_out_div)) {
+ ret = PTR_ERR(pll_post_out_div);
goto fail;
}

snprintf(clk_name, sizeof(clk_name), "dsi%d_pclk_mux", pll_10nm->phy->id);
- snprintf(parent, sizeof(parent), "dsi%d_pll_bit_clk", pll_10nm->phy->id);
- snprintf(parent2, sizeof(parent2), "dsi%d_pll_by_2_bit_clk", pll_10nm->phy->id);
- snprintf(parent3, sizeof(parent3), "dsi%d_pll_out_div_clk", pll_10nm->phy->id);
- snprintf(parent4, sizeof(parent4), "dsi%d_pll_post_out_div_clk", pll_10nm->phy->id);
-
- hw = devm_clk_hw_register_mux(dev, clk_name,
- ((const char *[]){
- parent, parent2, parent3, parent4,
+
+ pclk_mux = devm_clk_hw_register_mux_parent_hws(dev, clk_name,
+ ((const struct clk_hw *[]){
+ pll_bit,
+ pll_by_2_bit,
+ pll_out_div,
+ pll_post_out_div,
}), 4, 0, pll_10nm->phy->base +
- REG_DSI_10nm_PHY_CMN_CLK_CFG1,
- 0, 2, 0, NULL);
- if (IS_ERR(hw)) {
- ret = PTR_ERR(hw);
+ REG_DSI_10nm_PHY_CMN_CLK_CFG1, 0, 2, 0, NULL);
+ if (IS_ERR(pclk_mux)) {
+ ret = PTR_ERR(pclk_mux);
goto fail;
}

snprintf(clk_name, sizeof(clk_name), "dsi%d_phy_pll_out_dsiclk", pll_10nm->phy->id);
- snprintf(parent, sizeof(parent), "dsi%d_pclk_mux", pll_10nm->phy->id);

/* PIX CLK DIV : DIV_CTRL_7_4*/
- hw = devm_clk_hw_register_divider(dev, clk_name, parent, 0,
- pll_10nm->phy->base + REG_DSI_10nm_PHY_CMN_CLK_CFG0,
+ hw = devm_clk_hw_register_divider_parent_hw(dev, clk_name, pclk_mux,
+ 0, pll_10nm->phy->base + REG_DSI_10nm_PHY_CMN_CLK_CFG0,
4, 4, CLK_DIVIDER_ONE_BASED, &pll_10nm->postdiv_lock);
if (IS_ERR(hw)) {
ret = PTR_ERR(hw);
--
2.36.1