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Date:   Fri, 14 Feb 2020 12:45:36 +0530
From:   Srinivas Neeli <srinivas.neeli@...inx.com>
To:     linus.walleij@...aro.org, bgolaszewski@...libre.com,
        michal.simek@...inx.com, shubhrajyoti.datta@...inx.com
Cc:     linux-gpio@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, git@...inx.com
Subject: [PATCH V2 6/7] gpio: zynq: Add pmc gpio support

From: Shubhrajyoti Datta <shubhrajyoti.datta@...inx.com>

Add PMC gpio support.
Only bank 0,1, 3 and 4 are connected to the multiplexed Input output
pins. Bank 0 and 1 to mio and bank 3 and 4 to extended multiplexed input
output pins.

Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@...inx.com>
Signed-off-by: Michal Simek <michal.simek@...inx.com>
---
Versal devices are the industry's first adaptive compute acceleration platforms.
https://www.xilinx.com/support/documentation/data_sheets/ds950-versal-overview.pdf

On the Versal platform, we are using two customized GPIO controllers(IP) which were used in Zynq/ZynqMp platform.
One of them present in the Platform Management Controller(PMC) block and other in Processing System(PS) block.

In PMC_GPIO only Bank0,1,3 & 4 are enabled and in PS_GPIO only Bank 0 & 3 are enabled.

You can find more details of GPIO IP in ZynqMP TRM General Purpose I/O(Chapter-27).
https://www.xilinx.com/support/documentation/user_guides/ug1085-zynq-ultrascale-trm.pdf
---
 drivers/gpio/gpio-zynq.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/gpio/gpio-zynq.c b/drivers/gpio/gpio-zynq.c
index b6261a3aec55..2ddb59b242e7 100644
--- a/drivers/gpio/gpio-zynq.c
+++ b/drivers/gpio/gpio-zynq.c
@@ -23,6 +23,7 @@
 #define ZYNQ_GPIO_MAX_BANK	4
 #define ZYNQMP_GPIO_MAX_BANK	6
 #define VERSAL_GPIO_MAX_BANK	4
+#define PMC_GPIO_MAX_BANK	5
 #define VERSAL_UNUSED_BANKS	2
 
 #define ZYNQ_GPIO_BANK0_NGPIO	32
@@ -815,6 +816,20 @@ static const struct zynq_platform_data versal_gpio_def = {
 	.bank_max[3] = 57, /* Bank 3 is connected to FMIOs (32 pins) */
 };
 
+static const struct zynq_platform_data pmc_gpio_def = {
+	.label = "pmc_gpio",
+	.ngpio = 116,
+	.max_bank = PMC_GPIO_MAX_BANK,
+	.bank_min[0] = 0,
+	.bank_max[0] = 25, /* 0 to 25 are connected to MIOs (26 pins) */
+	.bank_min[1] = 26,
+	.bank_max[1] = 51, /* Bank 1 are connected to MIOs (26 pins) */
+	.bank_min[3] = 52,
+	.bank_max[3] = 83, /* Bank 3 is connected to EMIOs (32 pins) */
+	.bank_min[4] = 84,
+	.bank_max[4] = 115, /* Bank 4 is connected to EMIOs (32 pins) */
+};
+
 static const struct zynq_platform_data zynqmp_gpio_def = {
 	.label = "zynqmp_gpio",
 	.quirks = GPIO_QUIRK_DATA_RO_BUG,
@@ -853,6 +868,7 @@ static const struct of_device_id zynq_gpio_of_match[] = {
 	{ .compatible = "xlnx,zynq-gpio-1.0", .data = &zynq_gpio_def },
 	{ .compatible = "xlnx,zynqmp-gpio-1.0", .data = &zynqmp_gpio_def },
 	{ .compatible = "xlnx,versal-gpio-1.0", .data = &versal_gpio_def },
+	{ .compatible = "xlnx,pmc-gpio-1.0", .data = &pmc_gpio_def },
 	{ /* end of table */ }
 };
 MODULE_DEVICE_TABLE(of, zynq_gpio_of_match);
-- 
2.7.4

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