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soc: qcom: Add LLCC support for multi channel DDR

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Add LLCC support for multi channel DDR configuration
based on a feature register.

Signed-off-by: Komal Bajaj <quic_kbajaj@quicinc.com>
Acked-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20230830105654.28057-5-quic_kbajaj@quicinc.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
This commit is contained in:
Komal Bajaj 2023-08-30 16:26:52 +05:30 committed by Bjorn Andersson
parent 54e1f99d91
commit a78502a4b2
1 changed files with 24 additions and 1 deletions
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25
drivers/soc/qcom/llcc-qcom.c
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@ -12,6 +12,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/nvmem-consumer.h>
#include <linux/of.h>
#include <linux/regmap.h>
#include <linux/sizes.h>
@ -995,6 +996,24 @@ static int qcom_llcc_cfg_program(struct platform_device *pdev,
return ret;
}
static int qcom_llcc_get_cfg_index(struct platform_device *pdev, u8 *cfg_index, int num_config)
{
int ret;
ret = nvmem_cell_read_u8(&pdev->dev, "multi-chan-ddr", cfg_index);
if (ret == -ENOENT || ret == -EOPNOTSUPP) {
if (num_config > 1)
return -EINVAL;
*cfg_index = 0;
return 0;
}
if (!ret && *cfg_index >= num_config)
ret = -EINVAL;
return ret;
}
static int qcom_llcc_remove(struct platform_device *pdev)
{
/* Set the global pointer to a error code to avoid referencing it */
@ -1031,6 +1050,7 @@ static int qcom_llcc_probe(struct platform_device *pdev)
const struct qcom_llcc_config *cfg;
const struct llcc_slice_config *llcc_cfg;
u32 sz;
u8 cfg_index;
u32 version;
struct regmap *regmap;
@ -1052,7 +1072,10 @@ static int qcom_llcc_probe(struct platform_device *pdev)
ret = -EINVAL;
goto err;
}
cfg = &cfgs->llcc_config[0];
ret = qcom_llcc_get_cfg_index(pdev, &cfg_index, cfgs->num_config);
if (ret)
goto err;
cfg = &cfgs->llcc_config[cfg_index];
ret = regmap_read(regmap, cfg->reg_offset[LLCC_COMMON_STATUS0], &num_banks);
if (ret)