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Commit 3f15815e authored by Anant Goel's avatar Anant Goel
Browse files

drivers: msm: pinctrl: Add custom TLMM direct connect list feature support 



Add support to provide a custom list of TLMM GPIOs, associated with
hardware IRQs, for direct connect interrupt support on the
sdmshrike target.

Change-Id: Ied5934e6d0162806370b636d343cc525e3b15954
Signed-off-by: default avatarAnant Goel <anantg@codeaurora.org>
parent d55696ba

Documentation/devicetree/bindings/pinctrl/qcom,sdmshrike-pinctrl

+7 −0
Original line number Diff line number Diff line
@@ -47,6 +47,13 @@ sdmshrike platform. 
	Definition: must be 2. Specifying the pin number and flags, as defined

		    in <dt-bindings/gpio/gpio.h>



- dirconn-list:

	Usage: optional

	Value type: <prop-encoded-array>

	Definition: a 3-tuple list which contains the mapping of GPIO pin to

		    hardware IRQ, and a boolean for enabling the TLMM direct

		    connect interrupt for the pin.



Please refer to ../gpio/gpio.txt and ../interrupt-controller/interrupts.txt for

a general description of GPIO and interrupt bindings.

drivers/pinctrl/qcom/pinctrl-sdmshrike.c

+57 −1
Original line number Diff line number Diff line
@@ -2257,7 +2257,7 @@ static struct msm_dir_conn sdmshrike_dir_conn[] = { 
	{-1, 209},

};



static const struct msm_pinctrl_soc_data sdmshrike_pinctrl = {

static struct msm_pinctrl_soc_data sdmshrike_pinctrl = {

	.pins = sdmshrike_pins,

	.npins = ARRAY_SIZE(sdmshrike_pins),

	.functions = sdmshrike_functions,
@@ -2270,8 +2270,64 @@ static const struct msm_pinctrl_soc_data sdmshrike_pinctrl = { 
	.dir_conn_irq_base = 216,

};



static int sdmshrike_pinctrl_parse_dt(struct platform_device *pdev)

{

	const __be32 *prop;

	struct msm_dir_conn *dir_conn_list;

	uint32_t dir_conn_length, iterator = 0;

	int i, length, *dir_conn_entries, num_dir_conns;



	prop = of_get_property(pdev->dev.of_node, "dirconn-list",

			&length);



	dir_conn_length = length / sizeof(u32);



	dir_conn_entries = devm_kcalloc(&pdev->dev,

				dir_conn_length, sizeof(uint32_t), GFP_KERNEL);

	if (!dir_conn_entries)

		return -ENOMEM;



	for (i = 0; i < dir_conn_length; i++)

		dir_conn_entries[i] = be32_to_cpu(prop[i]);



	if (dir_conn_length % 3) {

		dev_err(&pdev->dev,

			"Can't parse an entry with fewer than three values\n");

		return -EINVAL;

	};



	num_dir_conns = (dir_conn_length / 3);



	dir_conn_list = devm_kcalloc(&pdev->dev,

			num_dir_conns, sizeof(*dir_conn_list), GFP_KERNEL);

	if (!dir_conn_list)

		return -ENOMEM;



	for (i = 0; i < num_dir_conns; i++) {

		dir_conn_list[i].gpio = dir_conn_entries[iterator++];

		dir_conn_list[i].hwirq = dir_conn_entries[iterator++];

		dir_conn_list[i].tlmm_dc = dir_conn_entries[iterator++];

	}



	sdmshrike_pinctrl.dir_conn = dir_conn_list;

	sdmshrike_pinctrl.n_dir_conns = num_dir_conns;



	return 0;

}



static int sdmshrike_pinctrl_probe(struct platform_device *pdev)

{

	int len, ret;



	if (of_find_property(pdev->dev.of_node, "dirconn-list", &len)) {

		ret = sdmshrike_pinctrl_parse_dt(pdev);

		if (ret) {

			dev_err(&pdev->dev,

				"Unable to parse TLMM direct connects\n");

			return ret;

		}

	}



	return msm_pinctrl_probe(pdev, &sdmshrike_pinctrl);

}