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mailbox: qcom: Convert APCS IPC driver to use regmap

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This hardware block provides more functionalities that just IPC. Convert
it to regmap to allow other child platform devices to use the same regmap.

Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
This commit is contained in:
Georgi Djakov 2017-12-05 17:46:56 +02:00 committed by Jassi Brar
parent ca64af4392
commit c6a8b171ca
1 changed files with 19 additions and 5 deletions
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24
drivers/mailbox/qcom-apcs-ipc-mailbox.c
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@ -18,6 +18,7 @@
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/mailbox_controller.h>
#define QCOM_APCS_IPC_BITS 32
@ -26,19 +27,25 @@ struct qcom_apcs_ipc {
struct mbox_controller mbox;
struct mbox_chan mbox_chans[QCOM_APCS_IPC_BITS];
void __iomem *reg;
struct regmap *regmap;
unsigned long offset;
};
static const struct regmap_config apcs_regmap_config = {
.reg_bits = 32,
.reg_stride = 4,
.val_bits = 32,
.max_register = 0x1000,
.fast_io = true,
};
static int qcom_apcs_ipc_send_data(struct mbox_chan *chan, void *data)
{
struct qcom_apcs_ipc *apcs = container_of(chan->mbox,
struct qcom_apcs_ipc, mbox);
unsigned long idx = (unsigned long)chan->con_priv;
writel(BIT(idx), apcs->reg);
return 0;
return regmap_write(apcs->regmap, apcs->offset, BIT(idx));
}
static const struct mbox_chan_ops qcom_apcs_ipc_ops = {
@ -47,7 +54,9 @@ static const struct mbox_chan_ops qcom_apcs_ipc_ops = {
static int qcom_apcs_ipc_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct qcom_apcs_ipc *apcs;
struct regmap *regmap;
struct resource *res;
unsigned long offset;
void __iomem *base;
@ -63,9 +72,14 @@ static int qcom_apcs_ipc_probe(struct platform_device *pdev)
if (IS_ERR(base))
return PTR_ERR(base);
regmap = devm_regmap_init_mmio(&pdev->dev, base, &apcs_regmap_config);
if (IS_ERR(regmap))
return PTR_ERR(regmap);
offset = (unsigned long)of_device_get_match_data(&pdev->dev);
apcs->reg = base + offset;
apcs->regmap = regmap;
apcs->offset = offset;
/* Initialize channel identifiers */
for (i = 0; i < ARRAY_SIZE(apcs->mbox_chans); i++)