[PATCH v3 09/19] PCI: qcom: Use bulk clock APIs for handling clocks for IP rev 2.3.3

Manivannan Sadhasivam
2023-03-10T04:10:37Z

All the clocks are enabled and disabled at the same time. So the bulk clock
APIs can be used to handle them together. This simplifies the code a lot.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
drivers/pci/controller/dwc/pcie-qcom.c | 88 ++++++--------------------
1 file changed, 20 insertions(+), 68 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index 939973733a1e..6b83e3627336 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -169,6 +169,12 @@ struct qcom_pcie_resources_2_3_2 {
struct regulator_bulk_data supplies[QCOM_PCIE_2_3_2_MAX_SUPPLY];
};

+#define QCOM_PCIE_2_3_3_MAX_CLOCKS 5
+struct qcom_pcie_resources_2_3_3 {
+ struct clk_bulk_data clks[QCOM_PCIE_2_3_3_MAX_CLOCKS];
+ struct reset_control *rst[7];
+};
+
#define QCOM_PCIE_2_4_0_MAX_CLOCKS 4
struct qcom_pcie_resources_2_4_0 {
struct clk_bulk_data clks[QCOM_PCIE_2_4_0_MAX_CLOCKS];
@@ -187,15 +193,6 @@ struct qcom_pcie_resources_2_4_0 {
struct reset_control *phy_ahb_reset;
};

-struct qcom_pcie_resources_2_3_3 {
- struct clk *iface;
- struct clk *axi_m_clk;
- struct clk *axi_s_clk;
- struct clk *ahb_clk;
- struct clk *aux_clk;
- struct reset_control *rst[7];
-};
-
/* 6 clocks typically, 7 for sm8250 */
struct qcom_pcie_resources_2_7_0 {
struct clk_bulk_data clks[12];
@@ -896,26 +893,17 @@ static int qcom_pcie_get_resources_2_3_3(struct qcom_pcie *pcie)
const char *rst_names[] = { "axi_m", "axi_s", "pipe",
"axi_m_sticky", "sticky",
"ahb", "sleep", };
+ int ret;

- res->iface = devm_clk_get(dev, "iface");
- if (IS_ERR(res->iface))
- return PTR_ERR(res->iface);
-
- res->axi_m_clk = devm_clk_get(dev, "axi_m");
- if (IS_ERR(res->axi_m_clk))
- return PTR_ERR(res->axi_m_clk);
-
- res->axi_s_clk = devm_clk_get(dev, "axi_s");
- if (IS_ERR(res->axi_s_clk))
- return PTR_ERR(res->axi_s_clk);
-
- res->ahb_clk = devm_clk_get(dev, "ahb");
- if (IS_ERR(res->ahb_clk))
- return PTR_ERR(res->ahb_clk);
+ res->clks[0].id = "iface";
+ res->clks[1].id = "axi_m";
+ res->clks[2].id = "axi_s";
+ res->clks[3].id = "ahb";
+ res->clks[4].id = "aux";

- res->aux_clk = devm_clk_get(dev, "aux");
- if (IS_ERR(res->aux_clk))
- return PTR_ERR(res->aux_clk);
+ ret = devm_clk_bulk_get(dev, ARRAY_SIZE(res->clks), res->clks);
+ if (ret < 0)
+ return ret;

for (i = 0; i < ARRAY_SIZE(rst_names); i++) {
res->rst[i] = devm_reset_control_get(dev, rst_names[i]);
@@ -930,11 +918,7 @@ static void qcom_pcie_deinit_2_3_3(struct qcom_pcie *pcie)
{
struct qcom_pcie_resources_2_3_3 *res = &pcie->res.v2_3_3;

- clk_disable_unprepare(res->iface);
- clk_disable_unprepare(res->axi_m_clk);
- clk_disable_unprepare(res->axi_s_clk);
- clk_disable_unprepare(res->ahb_clk);
- clk_disable_unprepare(res->aux_clk);
+ clk_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks);
}

static int qcom_pcie_init_2_3_3(struct qcom_pcie *pcie)
@@ -969,47 +953,15 @@ static int qcom_pcie_init_2_3_3(struct qcom_pcie *pcie)
*/
usleep_range(2000, 2500);

- ret = clk_prepare_enable(res->iface);
- if (ret) {
- dev_err(dev, "cannot prepare/enable core clock\n");
- goto err_clk_iface;
- }
-
- ret = clk_prepare_enable(res->axi_m_clk);
- if (ret) {
- dev_err(dev, "cannot prepare/enable core clock\n");
- goto err_clk_axi_m;
- }
-
- ret = clk_prepare_enable(res->axi_s_clk);
- if (ret) {
- dev_err(dev, "cannot prepare/enable axi slave clock\n");
- goto err_clk_axi_s;
- }
-
- ret = clk_prepare_enable(res->ahb_clk);
- if (ret) {
- dev_err(dev, "cannot prepare/enable ahb clock\n");
- goto err_clk_ahb;
- }
-
- ret = clk_prepare_enable(res->aux_clk);
+ ret = clk_bulk_prepare_enable(ARRAY_SIZE(res->clks), res->clks);
if (ret) {
- dev_err(dev, "cannot prepare/enable aux clock\n");
- goto err_clk_aux;
+ dev_err(dev, "cannot prepare/enable clocks\n");
+ goto err_assert_resets;
}

return 0;

-err_clk_aux:
- clk_disable_unprepare(res->ahb_clk);
-err_clk_ahb:
- clk_disable_unprepare(res->axi_s_clk);
-err_clk_axi_s:
- clk_disable_unprepare(res->axi_m_clk);
-err_clk_axi_m:
- clk_disable_unprepare(res->iface);
-err_clk_iface:
+err_assert_resets:
/*
* Not checking for failure, will anyway return
* the original failure in 'ret'.
--
2.25.1