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pwm: meson: Add compatible for the gxbb ao PWMs

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On the gxbb (and gxl) family, the PWMs of the AO domain require a
specific compatible because the possible input clocks are different
from the EE PWMs input clocks.

Since the number of possible input clocks is also different, the
'num_parents' field is added to all the Meson PWM data.

Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
This commit is contained in:
Jerome Brunet 2017-06-08 14:24:15 +02:00 • committed by Thierry Reding
parent a054c4d684
commit d396b20a1e
1 changed files with 29 additions and 3 deletions
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32
drivers/pwm/pwm-meson.c
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@ -103,6 +103,7 @@ struct meson_pwm_channel {
struct meson_pwm_data {
const char * const *parent_names;
unsigned int num_parents;
};
struct meson_pwm {
@ -381,6 +382,7 @@ static const char * const pwm_meson8b_parent_names[] = {
static const struct meson_pwm_data pwm_meson8b_data = {
.parent_names = pwm_meson8b_parent_names,
.num_parents = ARRAY_SIZE(pwm_meson8b_parent_names),
};
static const char * const pwm_gxbb_parent_names[] = {
@ -389,11 +391,35 @@ static const char * const pwm_gxbb_parent_names[] = {
static const struct meson_pwm_data pwm_gxbb_data = {
.parent_names = pwm_gxbb_parent_names,
.num_parents = ARRAY_SIZE(pwm_gxbb_parent_names),
};
/*
* Only the 2 first inputs of the GXBB AO PWMs are valid
* The last 2 are grounded
*/
static const char * const pwm_gxbb_ao_parent_names[] = {
"xtal", "clk81"
};
static const struct meson_pwm_data pwm_gxbb_ao_data = {
.parent_names = pwm_gxbb_ao_parent_names,
.num_parents = ARRAY_SIZE(pwm_gxbb_ao_parent_names),
};
static const struct of_device_id meson_pwm_matches[] = {
{ .compatible = "amlogic,meson8b-pwm", .data = &pwm_meson8b_data },
{ .compatible = "amlogic,meson-gxbb-pwm", .data = &pwm_gxbb_data },
{
.compatible = "amlogic,meson8b-pwm",
.data = &pwm_meson8b_data
},
{
.compatible = "amlogic,meson-gxbb-pwm",
.data = &pwm_gxbb_data
},
{
.compatible = "amlogic,meson-gxbb-ao-pwm",
.data = &pwm_gxbb_ao_data
},
{},
};
MODULE_DEVICE_TABLE(of, meson_pwm_matches);
@ -417,7 +443,7 @@ static int meson_pwm_init_channels(struct meson_pwm *meson,
init.ops = &clk_mux_ops;
init.flags = CLK_IS_BASIC;
init.parent_names = meson->data->parent_names;
init.num_parents = 1 << MISC_CLK_SEL_WIDTH;
init.num_parents = meson->data->num_parents;
channel->mux.reg = meson->base + REG_MISC_AB;
channel->mux.shift = mux_reg_shifts[i];