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mfd: qcom_rpm: Parametrize also ack selector size

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commit f37be01e6d upstream.

The RPM has two sets of selectors (IPC bit fields): request and
acknowledge. Apparently, some models use 4*32 bit words for select
and some use 7*32 bit words for request, but all use 7*32 words
for acknowledge bits.

So apparently you can on the models with requests of 4*32 select
bits send 4*32 messages and get 7*32 different replies, so on ACK
interrupt, 7*32 bit words need to be read. This is how the vendor
code apparently works.

Reported-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Linus Walleij
2016-06-22 08:27:17 +02:00
committed by popcornmix
parent 61d09701d9
commit 9540eb2fab
1 changed files with 12 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
drivers/mfd/qcom_rpm.c
View File

@@ -39,7 +39,8 @@ struct qcom_rpm_data {
unsigned int req_sel_off;
unsigned int ack_ctx_off;
unsigned int ack_sel_off;
unsigned int sel_size;
unsigned int req_sel_size;
unsigned int ack_sel_size;
};
struct qcom_rpm {
@@ -162,7 +163,8 @@ static const struct qcom_rpm_data apq8064_template = {
.req_sel_off = 11,
.ack_ctx_off = 15,
.ack_sel_off = 23,
.sel_size = 4,
.req_sel_size = 4,
.ack_sel_size = 7,
};
static const struct qcom_rpm_resource msm8660_rpm_resource_table[] = {
@@ -250,7 +252,8 @@ static const struct qcom_rpm_data msm8660_template = {
.req_sel_off = 11,
.ack_ctx_off = 19,
.ack_sel_off = 27,
.sel_size = 7,
.req_sel_size = 7,
.ack_sel_size = 7,
};
static const struct qcom_rpm_resource msm8960_rpm_resource_table[] = {
@@ -337,7 +340,8 @@ static const struct qcom_rpm_data msm8960_template = {
.req_sel_off = 11,
.ack_ctx_off = 15,
.ack_sel_off = 23,
.sel_size = 4,
.req_sel_size = 4,
.ack_sel_size = 7,
};
static const struct qcom_rpm_resource ipq806x_rpm_resource_table[] = {
@@ -382,7 +386,8 @@ static const struct qcom_rpm_data ipq806x_template = {
.req_sel_off = 11,
.ack_ctx_off = 15,
.ack_sel_off = 23,
.sel_size = 4,
.req_sel_size = 4,
.ack_sel_size = 7,
};
static const struct of_device_id qcom_rpm_of_match[] = {
@@ -419,7 +424,7 @@ int qcom_rpm_write(struct qcom_rpm *rpm,
writel_relaxed(buf[i], RPM_REQ_REG(rpm, res->target_id + i));
bitmap_set((unsigned long *)sel_mask, res->select_id, 1);
for (i = 0; i < rpm->data->sel_size; i++) {
for (i = 0; i < rpm->data->req_sel_size; i++) {
writel_relaxed(sel_mask[i],
RPM_CTRL_REG(rpm, rpm->data->req_sel_off + i));
}
@@ -448,7 +453,7 @@ static irqreturn_t qcom_rpm_ack_interrupt(int irq, void *dev)
int i;
ack = readl_relaxed(RPM_CTRL_REG(rpm, rpm->data->ack_ctx_off));
for (i = 0; i < rpm->data->sel_size; i++)
for (i = 0; i < rpm->data->ack_sel_size; i++)
writel_relaxed(0,
RPM_CTRL_REG(rpm, rpm->data->ack_sel_off + i));
writel(0, RPM_CTRL_REG(rpm, rpm->data->ack_ctx_off));